rec.aviation.homebuilt FAQ
Ronald James Wanttaja
marked by a vertical bar ("|") in the left margin. ("rn" and "trn"
users may search for new materials using "g^|".)
This document attempts to answer common questions asked by newcomers to
the rec.aviation.homebuilt newsgroup, or those curious individuals
unfamiliar with the domain of homebuilt aircraft. It assumes that the
reader already possesses limited familiarity with aviation in general.
It is not meant to answer any and all questions, but it is intended to
give the reader a foundation upon which to learn more on their own. The
article is laced with the author's perception of "conventional wisdom",
which does tend to change as time passes.
The following questions are answered in this FAQ:
Q301: What is the Experimental category, and what types of aircraft are
classified/operated in that category?
Q302: What is a kitplane versus a plans-built airplane?
Q303: What separates a homebuilt from an ultralight?
Q304: Why would someone want to build and fly a homebuilt when perfectly
good certified aircraft are available?
Q305: What is the 51% rule, and how does it affect me?
Q306: What are some common experimental types, kit-built or not?
Q307: What are the tradeoffs of metal vs wood vs composites?
Q308: What types of engines can I use?
Q309: Why do pilots get so upset over the choices between two and four
stroke engines?
Q310: Can I use non-certified props?
Q311: How do I license my completed airplane, and what inspections are
needed?
Q312: How are registration numbers assigned, and can I choose one?
Q313: Can I type-certify my airplane?
Q314: If I sell the airplane, am I liable for it later?
Q315: What operations are illegal in my homebuilt that might not be
in a type-certified airplane?
Q316: What happens if I buy a homebuilt that I didn't build?
Q317: Can I insure a homebuilt airplane?
Q318: Am I safe flying a homebuilt airplane?
Q319: What health hazards might be involved while building?
Q320: What design should I choose?
Q321: Where can I see one of my choices, and can I fly one?
Q322: How long will it take to finish?
Q323: How do I know if I can afford it?
Q324: What tools and facilities will I need?
Q325: Will my marriage survive?
Q326: How do my maintenance costs compare to a certified airplane?
Q327: Who is the EAA, and what do they offer me?
How can I join, and are there any local builder clubs?
Q328: Where can I find parts or materials for my project?
Q329: Can I find more written info?
Q330: Are there any BBS'es where I can get more info?
Q331: Is there anyone on Usenet who knows about the GarageRocket 432?
Q332: I'm having trouble with construction, where can I get help?
Q333: What financing is available for building a plane?
The core of this FAQ was written by Steve Cornelius (formerly at
scorn...@ips.iacd.honeywell.com) with updates by Ron Wanttaja
(want...@halcyon.com). Comments, corrections, or suggestions always
welcome, please forward them to want...@halcyon.com.
Vast helpful assistance and input was provided by:
scorn...@ips.iacd.honeywell.com (Steve Cornelius)
ran...@cv.hp.com (Randy Stockberger)
charles...@dartmouth.edu (Corky Scott)
ve...@bellcore.com (G A Venkatesh - "venky")
----------------------------------
Subject: Legal category
Q301: What is the Experimental category, and what types of aircraft are
classified/operated in that category?
A: The Experimental category is essentially an "operating
classification" that has a legal bearing on the operation of the
aircraft, just like Normal, Utility, or Aerobatic categories have.
There are several sub-classifications in the category, such as
Amateur-built, Racing, Exhibition, Limited, R & D, and others.
Experimental/amateur-built aircraft are the primary emphasis in
this newsgroup. It refers to non-type-certified aircraft that are
built, maintained, and flown by individuals, thus the term
"homebuilt". Amateur-built aircraft are intended by the FAA to
serve as educational "vehicles" for their builders and pilots.
(sorry 'bout that pun...)
The original justification for making the category legal was that
it increased the pool of individuals knowledgeable in the area of
aircraft production. Thus the nation had "experts" in aircraft
production to draw upon in times of national emergency. Silly as
this may sound today, it was taken seriously in the mid '50s when
the category addition was being proposed.
Note that a type-certified airplane may also be re-categorized as
experimental if it's modified in a form such that the FAA will not
approve on a standard 337. This is often the case for prototype/
modified certified aircraft, or for highly specialized
applications (although these are often categorized as "Restricted"
too).
----------------------------------
Subject: Kitplanes
Q302: What is a kitplane versus a plans-built airplane?
A: Kitplanes are aircraft designs that are sold as a package of parts
and subassemblies to be assembled by the owner. They are primarily
a market response to the lack of new and affordable type-certified
production aircraft. The kitplane attempts to strike a balance
between those desiring a finished airplane, versus those wanting
to build. They also allow people to build a new aircraft when they
may not possess the time or ability to build from scratch. Cost of
a kitplane is generally higher than that of plans-built.
The "plans-built" aircraft is scratch built from a set of
engineering drawings only, the builder makes most all of the parts
from raw materials. This was the "original" form of homebuilding.
These take longer to complete than a kitplane, but can also be
less expensive and more rewarding to those who enjoy building. For
the popular designs, quite a few prefab parts do exist, especially
the ones that are too difficult or costly to fabricate yourself.
----------------------------------
Subject: Homebuilt .vs. Ultralight
Q303: What separates a homebuilt from an ultralight?
A: Ultralights and Experimentals may both be built by the owner, but
the ultralight may carry no passengers (except for instruction). It
also has limits on weight, speed, and fuel, which the homebuilt has
none of (outside of operating restrictions in part 91).
Often, licensed ultralight owners have chosen to obtain
airworthiness certificates so that they can overcome one or more of
these restrictions. This reclassifies the ultralight as an
experimental, and the pilot certificate, medical, and currency
requirements become effective.
----------------------------------
Subject: Homebuilt .vs. Certified
Q304: Why would someone want to build and fly a homebuilt when perfectly
good certified aircraft are available?
A: In a sense, Cessnas & Pipers can be compared to older Chevys and
Fords, in that they attempt to be "all things to all people". Such
compromises may be acceptable for most, but not all pilots.
One of the remarkable things about homebuilts is the sheer
diversity of designs & intended purposes. There are some compact
aircraft that store in your garage and fly off of any short field.
Right next to it might be another that carries 4 people 300mph at
18,000 ft. Next to that one is one that cost less that $10K to
build. Another could be flown in unlimited-class aerobatics.
Note that your garden variety Skyhawk can't do any of these things,
but it's still a quite a useful & desirable airplane. It all
depends on what you want it to do.
----------------------------------
Subject: FAA 51% Rule
Q305: What is the 51% rule, and how does it affect me?
A: In order for an aircraft to qualify as amateur-built, at least half
the work must be done by the builder, less than half may be
performed by a kit supplier or other outside sources.
The genesis of this rule surrounded the original Christen Eagle
kit. An FAA official insisted that Frank Christenson's biplane kit
was too complete, that the builder didn't need to do enough work.
Frank went to some length to prove to the FAA that this wasn't
true.
Now the FAA maintains a list of "approved" kits that have been
proven to comply with the 51% rule. Note that a kit does *not*
need to be on the list to be legally sold, it just serves as proof
to the FAA that the type complies with the rule. Some kit suppliers
opt not to put their products on the list, the reason being that
once approved, any changes to the product require reapproval by
the FAA. If your kit is not on the list, you will have to prove
51% compliance at inspection time.
The inspector does his job based on a set of guidelines published
in the "inspectors handbook" issued by the FAA to their field
inspectors. The guidelines for the 51% rule are established in this
handbook. All decisions made by the inspector are effectively
determinations "by the Administrator" (if you're familiar with the
FARs, you'll understand the phrase immediately :).
The "51% approved" list is available from the FAA's experimental
safety BBS in Oke City, see the number listed. Compliance decisions
that determine listed kits are made by an engineering group
internal to the FAA.
----------------------------------
Subject: Types
Q306: What are some common experimental types, kit-built or not?
A: Sorry, the list is just too long for the scope of a FAQ.
Keep an eye on the many magazines which cater to homebuilders;
any book magazine stand should carry a wide selection. All
run advertisements by both designers and builders, so try to
follow them for a while.
----------------------------------
Subject: Materials
Q307: What are the tradeoffs of metal vs wood vs composites?
A: This can be a heated subject amongst builders, we'll try to
approach the subject generally and gracefully.
Metal construction has the widest acceptance by the non-aviating
public. It is relatively simple to work with, and is inexpensive. A
metal structure is strong and of moderate weight and cost. But with
improper care it corrodes, and recent events (like the Hawaiian 737
that lost it's top) have reminded us that metal does have a finite
fatigue life.
Wood is the oldest aircraft structural material, but has a poor
public acceptance. The strength-to-weight ratio and fatigue
resistance of wood is excellent, the problem is simply its
susceptability to rot. Properly protected and stored, a wooden
airframe will last decades. But if not cared for, it will be
destroyed in a few short years. Wood also tends to be expensive,
and the supply is erratic.
Composites, "compost" jokes aside, have received much attention
recently from private and commercial builders alike, largely due to
work done a few years ago by Burt Rutan. Composite aircraft can be
quite strong structurally, and be built at very reasonable costs.
The airplanes have very low drag figures and beautiful finishes.
It is easy to work with. But there are concerns about longevity of
the material. Most resins create an airframe that must be painted
white to prevent excessive heat buildup in the sunshine, since
epoxies and vinylesters soften significantly with an increase in
temperature.
All methods are perfectly viable. Which one you choose all depends
on your preferences, abilities, and your needs for the airplane.
----------------------------------
Subject: Powerplants
Q308: What types of engines can I use?
A: Literally any! For years, homebuilders have relied on certified
engines. But as the cost of these engines rises, alternatives have
been found. Several companies are building specialty engines
specifically for experimental use, and others are hard at work
adapting automotive engines.
The Rotax engines have received lots of attention. There are both
two and four stroke geared engines for experimental use and most
are water cooled. All are fairly reasonable in cost compared to
their certified counterparts. These products develop power in the
40 to 100hp category.
Some builders are enthusiastic about auto conversions, some are
not. Early on, a few builders were pulling engines out of junked
autos with poor results. Untuned engines were not ready for such
high-manifold pressure operations and suffered burnt plugs, blown
pistons, etc. But other builders have taken the time to customize
and tune auto engines to the application, and the results are
improving. The all-aluminum small-block Chevrolet is becoming the
poor-mans "Mini Merlin" and produces excellent power (not to
mention sound!). Some are also experimenting with Wankel-type
rotaries, as their power-to-weight ratio and physical compactness
make them excellent candidates for aircraft use. Power in auto
conversions can run from 80 to 400+ hp.
Water-cooled engines aside, builders have used air-cooled
Volkswagen conversions for years, and several companies are now
producing parts and completed engines. One company (Mosler Engines)
actually has one of their VW Type IV engines certified in
Australia. VW engines sound similar to their Lycoming or
Continental counterparts but rev higher, in the 3100rpm range.
Modified stock crankshafts seem to show a tendency to break, but
the custom cranks do better (and cost more). Parts are usually
reasonable (but notice I didn't say "cheap").
If you are looking for an IFR cruiser to carry passengers, it may
be best to stick with certified engines and swallow the cost. But
if your purpose is a VFR weekend toy with good forced-landing
options and you like to tinker with motors, you might consider a
conversion. Again, your choice really depends on the mission.
A word of warning: When choosing a certified engine, the engine
must be equipped and maintained as it normally would be for a
certified aircraft. This means that all AD and bulletins must be
complied with. This can have some impact on your flight test
period. If you make any mods to such an engine, it will be
considered a non-certified engine for all intents and purposes by
the FAA, which will increase the test period from 25 to 40 hours.
It will also reduce the market value of an otherwise expensive
engine.
----------------------------------
Subject: Powerplant types
Q309: Why do pilots get so upset over the choices between two and four
stroke engines?
A: The four-stroke air-cooled engine has been the mainstay of light
aviation for over 50 years and this shows no immediate signs of
change. Yet some two-stroke designs have attracted strong
followings in recent years. Why has this happened?
The two most obvious factors are probably cost and weight. A 65hp
Rotax costs and weighs roughly 60% of its certified Continental
A-65 counterpart. For the newer generation of "portable"
lightplanes, this reduced weight is an obvious design advantage.
The owners of these types often have to be conservative with their
flying dollars as well, so the Rotax wins over many of them. When
they consider that it can be majored by the owner in his garage
for a few hundred dollars in an afternoon, the decision is easily
made.
Yet there are pilots out there who think of the idea of a
"chainsaw" engine as anathema to a proper aircraft. Improper
mixture control in a two-stroke can damage the engine quickly. The
vibration through the airframe is of a higher pitch. The higher
operating speed of the engine requires a geared speed reduction
system. Probably the worst offense: the sound of two-stroke
aircraft is simply unpleasant to some eardrums.
The reliability questions of two-strokes may have some basis. Then
again, it is often found that problems resulted from improper
installation, operation, or maintenance. Possibly there is truth
here, since the $10,000 certified engine understandably gets
"fussed" over considerably more. Its care and feeding are well
understood by most pilots since we are usually trained behind
such engines anyway.
Should you choose a two-stroke? Again, it all depends on your
preferences and requirements. If you need more than 65hp, your
decision is essentially made for now. But if it's a consideration
for you, study your options and carefully evaluate your needs.
Ride behind both and see if you're comfortable with them.
----------------------------------
Subject: Propellers
Q310: Can I use non-certified props?
A: Absolutely. You can use certified, original, or modified props.
----------------------------------
Subject: Licensing
Q311: How do I license my completed airplane, and what inspections are
needed?
A: You *did* document the construction, didn't you?
Before you are issued an airworthiness certificate, an FAA
inspector will require an inspection of the aircraft and all
documentation of its construction. They used to require a
"pre-cover inspection of the internal structure, but no longer.
Now they prefer that in-progress inspections are done by an EAA
Technical Counselor, and the inspector will look for his/her
comments in the construction log. When the FAA inspector arrives,
they expect the aircraft to be ready for inspection (all covers
removed), all taxi tests done and logged, and all documentation
ready for review.
When the inspector is satisfied that your airplane is ready for
inflight testing, they will issue a restricted airworthiness
certificate that describes a test period and testing requirements
(or they may insist on changes or repairs if deficiencies are
noted). The testing period is usually 40 flying hours (often 25 if
you use a certified engine & prop), and limits you to a fixed
testing area, normally a 25 mile radius from the home airport and
over unpopulated areas. Passengers are not allowed during the
testing period. While testing, keep a *detailed* log of all
activities, repairs, and changes.
The inspector will evaluate your testing at the end of the
test period, at which point he or she will issue a permanent
airworthiness certificate. At that point, you are free to carry
passengers and fly most anywhere you like.
If any major modifications or repairs are done later, the airplane
may need a re-inspection and retest. Call your local FSDO before
doing this to find out what they want to see.
You can also be issued a Repairmans Certificate for your airplane
only (*not* the type in general). This allows you to perform all
repairs, inspections, annuals, etc. on the airframe, since they
figure if you built it, you should be able to fix it. Note that in
FAR part 45, an "annual" is referred to as a "condition check",
which is legally different from an "annual inspection", even if
both actions are intended to accomplish the same goal.
Please note that the above information is valid only in the USA,
other countries usually have very similar requirements, with some
slight differences. Check with your local authorities before
committing any large sums of money or time to a project.
Also note that this procedure is the general case. It is entirely
possible that you may experience variations in the procedure. For
instance, one netter commented that his inspector waived the second
inspection and allowed standard experimental privileges immediately
after the test time was flown off and logged. As FAA policy often
varies between regions, expect some slight exceptions.
----------------------------------
Subject: Registration
Q312: How are registration numbers assigned, and can I choose one?
A: N numbers in the US are assigned by the FAA Aircraft Registry in
Oklahoma City. You must get one assigned before you have your
finished airplane inspected. It's sometimes suggested that you
wait until about 6 months before estimated completion, since they
will charge you an annual fee for reserving a number.
Requesting an assigned number will cost $5. If you want to request
a special number, it costs $10. If you request one, they suggest
you submit a list of choices, like 5 or so in order of your
preference.
----------------------------------
Subject: Certification
Q313: Can I type-certify my airplane?
A: Not recommended. The costs are extremely prohibitive (which is
often why the designers refuse to do it), and there is little
benefit. Remember that the only major restriction on experimental
operations is use of the aircraft for hire.
----------------------------------
Subject: Liability
Q314: If I sell the airplane, am I liable for it later?
A: Unfortunately, there is potential for a liability problem. Even
though "free" legal advice is often available on the net, I advise
you to contact your attorney if you find this issue troubling.
Some advocate having the buyer sign a "release form", which
would be promise not to sue if anything goes wrong. These
are essentially worthless... the buyer can't sign over his or
her *spouse's* rights, nor those of any one he or she sells
the airplane to.
----------------------------------
Subject: Legal operations
Q315: What operations are illegal in my homebuilt that might not be
in a type-certified airplane?
A: Operations for hire are *expressly* forbidden - no paid cargo or
passengers are permitted. Also, flight over densely populated areas
is also against the regs, but this does not seem to be enforced
strongly unless the "reckless operation" clause in part 91 is
called into play.
This is not as restrictive as you might think. Often clubs are
formed around homebuilt aircraft, and it is legal for you to pay an
instructor to give you a checkout or BFR in your airplane.
So in general, you can do most anything with your homebuilt that
you can do with normal private pilot privileges.
----------------------------------
Subject: Purchase
|Q316: What happens if I buy a homebuilt that I didn't build?
|A: You get poor, like all airplane owners :) Anyway, you will not
| be able to obtain a repairman certificate, since you didn't
| build the airplane. The airplane can be inspected and maintained
| by an A&P... an Inspection Authorization is not required. Also,
| if the original owner retains his or her Repairman Certificate,
| they can continue working on your plane...that is, if you can
| talk them into it.
| There is a "gentleman's agreement" between the FAA and EAA that
| allows the owner of a homebuilt to perform maintenance on the
| aircraft, as long as an A&P signs off the work within a year.
| In other words, the A&P's annual inspection not only covers the
| inspection of the airplane, but it counts as the yearly signoff
| for work done by the owner in the past year.
Parts for kitplanes may or may not be available depending on the
source. For either kit or plans-built, one thing to insist upon is
having the plans in your possession or available. This way should a
part need to be fabricated later, you still have the specs to do it
by.
----------------------------------
Subject: Insurance
Q317: Can I insure a homebuilt airplane?
A: Yes you can. The insurance company may have their own requirements
above the FARs, but they normally will insure one. You may find
lower limits on passenger liability coverage though.
However, there is a growing problem with higher performance
kitplanes such as the Glasair III, Lancair IV, 320, and 235. A
significant number of pilots have bought into these designs since
they offer performance levels in excess of that available from
Wichita. In an unfortunate few cases there has been poor
construction, and little to no training in aircraft that fly far
ahead of the average 172 or Cherokee pilot.
One example of changes: Where fast kitplanes are concerned, a major
aviation insurance company is insisting on periodic construction
inspections by company reps, and thorough checkouts in type
(+10hrs) before they will underwrite a policy for that aircraft.
Check this out before you make a commitment.
----------------------------------
Subject: Flight safety
Q318: Am I safe flying a homebuilt airplane?
A: You are as safe as you want to be. Little definitive data exists
comparing homebuilts to certified aircraft. One set of opinions
holds that accident rates are about the same for both certified
and homebuilt aircraft, once the test period for the homebuilt is
complete. Certified aircraft seem to have more unintentional IMC
accidents, while homebuilts fare worse in accidents resulting from
over-stress from aerobatics, forced landings, etc.
Safety is still a function of the pilots ability to make
intelligent decisions, as with all aviation.
----------------------------------
Subject: Builder safety
Q319: What health hazards might be involved while building?
A: The most obvious hazards are those involved with common shop
practices, such as wearing protective lenses, handling power tools
properly, etc. Follow common sense in shop practice, and you should
be just as safe as if you were building household furniture.
However, a more subtle danger exists where chemicals are concerned.
Composite structures require handling of chemical resins that are
more exotic that simple adhesives. Paint systems also require extra
care. Epoxies and Polyurethane finishes pose the worst problem.
Epoxies emit fumes that, while annoying, seem generally harmless
at first. But after exposure, your body builds an allergic reaction
to the substance. Once that threshold has been crossed, you will
be "sensitized" for the rest of your life. The isocyanate content
of polyurethane paint can trigger severe respiratory spasms once
you become sensitized to them. Again, the reaction potential never
goes away. Some paint and primer products also have carcinogenic
potentials as well.
The solution is skin and respiratory protection, and good
ventilation of the shop. *All* paints require at least filter
respiration, isocyanate based paints require a fresh-air system as
well. Wear protective gloves and eyewear. Above all, put an
exhaust fan in your shop and use it, so as not to affect the whole
household.
Before you open an unfamiliar substance, read *all* the supplier's
warnings about protection. If you don't understand them, the
supplier should be happy to explain the requirements. Whatever you
do, *please* don't ignore those precautions.
You may invest years and thousands of dollars in your airplane.
Make sure you're still healthy enough to fly it when the time
comes.
----------------------------------
Subject: Choosing a project
Q320: What design should I choose?
A: It's all up to the individual, but I'd highly suggest that you pay
particular attention to the following 2 items:
(1) Your desired mission for your airplane.
(2) Your available resources (money, space, ability, etc.)
Once you've a realistic and unemotional (!) handle on these items,
start checking out designs until you find 2 or 3 designs that fit
your situation best. Then go ahead and start checking out
differences between them. Don't dwell too much on factors like
"I've never done any welding" since you're going to have to learn
to do lots of things you never considered before. Also, designers'
claims for performance are often "stretched" a bit, so wait to
talk to owners before making any final decisions.
When you're at this point, it's time to start checking out real
aircraft. This is where the fun begins....
----------------------------------
Subject: Evaluating types
Q321: Where can I see one of my choices, and can I fly one?
A: Oshkosh is great place to see virtually everything side-by-side,
but it's not the best place to take a ride because of traffic. If
you do go to OSH, there will be builders' forums, dinners, and
parties for type-specific gatherings. Make sure you take advantage
of these. Same thing goes for Sun'n'Fun if you can make that
instead.
Smaller fly-ins may be better for taking a ride *if* your favorite
type shows up. If your pet design is a little more obscure, it may
take some effort.
Once you've expressed interest in a type (usually by buying the
$10-$20 "info pack"), the seller may provide you with the addresses
& phones of customers who are willing to demo. This is not as
unusual as one might think - builders often love to show off their
toys! But if the design is a single seater, forget the ride.
For most popular kitplanes, the companies usually keep a
demonstrator around. You will probably have to go to them unless
they are "touring" your area giving demos.
Some people do actually build and fly aircraft without ever having
seen or ridden in one. But if there's a way to avoid that, do!
----------------------------------
Subject: Completion time
Q322: How long will it take to finish?
A: Always longer than you think! A well-known writer in homebuilt
topics is often quoted as saying "Firewall-forward is half the
work", and "The jobs you thought were simple take forever, and the
jobs you thought were tough turn out to be easy".
Designers often try to minimize their estimates of completion time
for obvious reasons. And time varies significantly with builder
skill and experience. So the best way to estimate this is to talk
to other builders who have finished their projects.
For simple fixed-gear kitplanes, 500-1500 hours seems common. For
complex kitplanes (such as retractables) 1500-3000 is more
realistic. For plans-built airplanes, anywhere from 1000-8000+
hours are involved. All of these numbers are highly dependent on
the type, and on builder skills.
Don't be too dependant on "goal fixation", take the time to do the
job right. Above all, don't push it to try and get finished for a
major fly-in. The risks aren't worth it. Besides, the better
attention you pay to small details will make you feel all that
much better when you do fly it to a big event.
----------------------------------
Subject: Completion cost
Q323: How do I know if I can afford it?
A: Well, if you have to ask....
The "nickel & dime" costs in construction can really add up fast.
Generally, if the cost of a kit is already a real stretch, you have
a problem. Sometimes the finished cost of a kitplane will exceed
twice the cost of the kit itself.
Plan for this. Add up all the costs you can think of, then add 20%
for the stuff you *didn't* know about. Plan for contingencies: if
you make a mistake covering a wing, you may have to redo it (the
price of learning how). Be realistic with your estimations.
Scratch building is a little easier in that your expectations have
to be lowered. You expect a certain monthly amount to be spent
towards supplies, so you simply buy what you can afford, and hope
that it stays ahead of your building speed. You know that you're
trading time for money, and since completion is so far away it
doesn't seem so obvious.
Again, talk to other builders, and be honest with yourself about
what you can afford. An awful lot of projects never get finished
because the money supply ran out.
----------------------------------
Subject: Builder requirements
Q324: What tools and facilities will I need?
A: Many designers will specify the tools needed for construction in
their particular case. Again (sorry!) other builders are also a
good source.
Every builder will need a set of basic mechanics tools. Nothing
fancy, but cheap tools often cost you money and time too. Another
shop accessory almost everyone needs is a small portable (or big :)
air compressor. For painting, to cleaning parts, to driving rivets,
to general shop cleanup, compressed air is a welcome asset. A small
variable speed power drill is another virtual necessity.
A small grinder and a drill press are other useful items. For wood,
a small table saw and bandsaw are indispensable. An orbital sander
is needed for wood and composite finishing. Wood builders simply
*never* have enough clamps, or so it seems. There are many, many
other items which are often nice, but not necessarily mandatory.
Builders often get quite carried away with tools, and its true that
they can make a job easier and faster. But if you're in a squeeze
for a particularly expensive tool, think about how often you will
use it. It's entirely possible that you're better off renting one,
or borrowing one from a friend.
It's often amazing to hear of the places airplanes have been
created. One grand-champion airplane from the '92 season was built
on the owners back patio! But the favorite shop by far is the
ubiquitous suburban garage. Most airplanes can have the majority
of the work done on components in the garage, usually moving to
the hangar at the final assembly stage.
Whatever space you use, make sure it's well lighted and ventilated.
Composite aircraft may require winter heat in order for resins to
cure properly. Above all, make sure you can get the assembly *out*
of the shop before you start. More than one builder has had to
"modify" his basement to extract a completed wing....
----------------------------------
Subject: Marital discord
Q325: Will my marriage survive?
A: This is too often the sad joke on the prop-tags at fly-ins: "Cost:
$64000 plus Linda" or "Brenda's Nightmare" placarded on the panel.
We've also heard of cases where a choice had to be made between the
lover and the airplane, and the plane won. Such is the magnet of
aviation....
Discuss this at length with your significant other. Explain the
commitment and be truthful. If they fly, great! But if not,
seriously weigh the situation and enter with his or her blessing.
Talk it over well with the kids too, if you have them. Some of them
thrill at the idea of building "our very own plane". Others will
think you've lost your mind. Kids can be great helpers too. What
better way to prove to them the practical value of education?
Consider establishing a planned work schedule. This does two
things, it lets the family know when you will be available, and
it helps keep your work habits consistent (keeping you on track
to finish it).
Once started, don't forget dinners out, long walks, helping the
kids with homework, and bathing the dog. They all need you too.
Have the number of the nearest florist on the shop wall, just in
case.
Then again, sometimes sanding the perfect finish on an elevator
can make a lousy day disappear in a hurry...
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Subject: Maintenance cost
Q326: How do my maintenance costs compare to a certified airplane?
A: Probably lower for the homebuilt, but it's not an absolute
guarantee. Parts prices will be far less, and if you're the
original builder, labor cost is zero. But if your engine
installation or wiring has problems, expensive parts can break in
a hurry.
Take care of it, and it should take care of you.
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Subject: Experimental Aircraft Association
Q327: Who is the EAA, and what do they offer me?
How can I join, and are there any local builder clubs?
A: The Experimental Aircraft Association was formed in the '50s for
the purpose of sharing information amongst homebuilders. Originally
regional in scope, the EAA rapidly grew in later years. EAA
headquarters in Oshkosh WI is the sponsor and site of the annual
aviation party now known worldwide simply as "Oshkosh".
EAAs political involvement is somewhat different from the AOPA. The
AOPA was formed in support of all types of pilots, and tends to be
more of a pilot aid and lobbying organization, while the EAA
focuses more on building and flying for sport. This is not to say
that they don't take a political stance for their membership,
however. They have been active in the area of simplified
certification requirements for new training aircraft, and they had
a part in the creation of auto-fuel STC's for certified light
aircraft. Frankly, if you're a pilot, both organizations deserve
your support.
The foundation of EAA's membership support is through the
organization of hundreds of local "chapters" where members get
together on a routine basis.
Some chapters have club-wide projects, some stress education, and
some are only social in function. Most have at least one "Technical
Counselor" that can help you with your project, or provide
inspections. Involvement with a chapter is not a bad idea if you're
just getting started.
I can't stress the function of the Tech Counselor enough. If
you're about to begin a project, you will need someone to check
out your work and sign the construction log to effect. The
sooner you get to know these people, the better off you'll be.
The membership office is at (800)322-2412. The general office
number is (414)426-4800. If you join, they will provide local
chapter info upon request. Their address is:
EAA Aviation Center
P.O. Box 3086
Oshkosh, WI 54903-3086
http://www.eaa.org/
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Subject: Parts and Supplies
Q328: Where can I find parts or materials for my project?
A. Grab any homebuilder's magazine and scan the advertisements.
There are pleny of outfits just itching to set you up.
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Subject: Books
Q329: Can I find more written info?
A: First, join the EAA. Among other benefits, they have an
extensive catalog of books covering homebuilding. Anything
writen by Tony Bingelis is a good start.
Available from the FAA (call your local FSDO) and suggested:
AC 20-27D - Certification and Operation of Amateur-Built Aircraft.
AC 90-89 - Amateur-Built aircraft Flight Testing Handbook.
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Subject: Computer Info
Q330: Are there any BBS'es where I can get more info?
A: The FAA runs the "Experimental Safety BBS" in Oke City. Access is
free, and usage is anonymous if desired. The service is provided
to the homebuilt community as an effort to help disseminate
information about potential safety problems with experimental
aircraft. A list of "51% Approved" kits is online, and a list of
most AD's on certified engines and accessories commonly used in
homebuilts is also available.
The number is (800)426-3814 @ 2400-N-8-1, after working hours.
The password is "safety". (Sorry, there is no Internet access).
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Subject: Other builders
Q331: Is there anyone on Usenet who knows about the GarageRocket 432?
A: There is a "builders list" regularly reposted to
rec.aviation.homebuilt. Most, if not all, will be quite
willing to talk about their project.
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Subject: Finding Assistance:
Q332: I'm having trouble with construction, where can I get help?
A: If you're having trouble with plans or type-specific details:
The first place to check is with the kit or plans supplier. They
may be able to assist over the phone, or direct you to someone in
your area who has been through this before. This also allows the
supplier to know where the weak spots in their documentation are
so that it can be fixed later.
The local EAA chapter may know of other builders of your type
nearby, or there may even be a type club in the area. Check with
these groups also, they'll be glad to assist.
If you're stuck on construction technique (welding, painting, etc):
Again, check with the local EAA chapter for someone who has some
experience with the technique causing you trouble. All of us end up
learning a few skills in the course of construction, so don't be
afraid to ask for help when it's needed. Remember, you'll be
trusting your life to the airplane, so learn to do it right.
Certain skills will require practice, so please don't run right out
and try things on a new airframe first. If you're learning to weld
for instance, sacrifice some tubing and practice on it until the
quality of your workmanship becomes acceptable. It will be cheaper
and easier in the long run. Save the samples also, the inspector
will feel better looking at a "destructible" sample.
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Subject: Homebuilt Aircraft Financing
Q333: How can I finance my kit purchase?
A: The best way is to select a kit that either builds from scratch
or is available as subkits. Financing increases your cost quite
a bit.
Netters have identified two companies which have financing
available for homebuilders. Here are some of their terms, as supplied
in October, 1995:
NAFCO/EAA Finance Plan
(800) 999-3712
$10,000 minimum loan, no maximum. They'll fund 70% of the total cost
for up to five years, then will extend the loan until aircraft
completion. Loan rate is based on the prime rate and the amount
borrowed: 3% over prime for $10,000-$15,000, 2.5% over prime for $15K
to $25K, 2% over prime for loans $25K to $50K, and prime +1.5% for
over $50,000.
Green Tree Financial Corporation
(800) 851-1367 extension 3692
$5,000 minimum, no maximum. Finance 90% of the total cost for up to 15
years. Interest rate for less than $25,000 is currently 13%, $25K< is
11%.
Other options include: Borrow from 401K finance plan (~8% interest),
signature loan from credit union (the current rate at my CU is
11.75%), or home equity loan (~8.5%).
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[end of rec.aviation.homebuilt FAQ]
Ron Wanttaja
want...@halcyon.com