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Hi,
I built a Super KAOS – electrified.
My major comments are as follows:
1. Take care in considering how to modify the motor mount.
2. Build it light, remove a lot of wood.
3. I built my S. KAOS and my Current Dirty Birdi to use 2 3S batteries. I mounted these so that I could move them around to adjust the CG and not need to add weight. I’d be glad to share more details if you wish.
Enjoy
Steve P.
Gotcha. Being new I had to ask. So the f15 disguised as a cub isn't going to work out well?
Stephen, thanks for the tips. If you'd elaborate on the motor mount, and motor selection that be great. A 3S battery vs a 4S. I assume you checked both ways?
Stephen, the DB you have...... The 60 size or 40 size?
It is a 60. I’m using an e-flight power 60.
As a mater-of-fact I’m right now replacing the old Power 60 with a new one.
Steve
I’ll take a couple of pictures and send you some info later this morning.
From: SPAme...@googlegroups.com [mailto:SPAme...@googlegroups.com] On Behalf Of Barry Demers
Sent: Wednesday, September 10, 2014 7:19 AM
To: SPAme...@googlegroups.com
Barry,
OK Here are some pictures and suggestions based on both the KAOS and DB builds. These pictures are from the Dirty Birdi, but as I said the S. KAOS build is almost identical.
Picture 1294 shows the top with the hatch removed. The way I made the hatch was to tack glue the top block during construction and then cut the two ends and break the take-bonds after I finished all of the shaping and sanding. I added extra braces to the fuselage build because of the size of the hatch.
Picture 1293 is a close up view. There are two battery trays for 3S batteries. This allows spreading out the weight both in front of and behind the CG. On the right side of the picture you can see a hole I cut out to allow access to wires related to the ESC and the disconnect plug. The batteries are held in with Velcro.
Pictures 1295 and 1296 are looking into the battery compartment areas. You will notice that I needed to open up the bulkheads to allow the batteries to be slipped in. The batteries that I am using are “GForce 25C 5000mAh 3S Car LiPO Pack (Hard Case) – from Value Hobby” . Be sure that you have the dimensions for whatever batteries that you want to use. I put Velcro on the trays and on the batteries and use Velcro straps to hold them down. So far there has been no problem with either plane regarding the batteries.
Picture ESC Mount shows the esc is mounted to the bottom. I decided to mount the ESC this way to allow for better cooling and not need to worry about airflow through the fuse too much.
Picture 1299 shows the cowling. I built an appropriately sized bulkhead positioned to get the prop in the correct place and used that instead of the one that came with the kit. I built up the nose completely and did all of the sanding and then cut cowl off with a band saw. I faced both sides of the cut with 1/32 ply and installed alignment pins.
Picture 1298 shows the hatch in place, but the cowl is not on. As I said I am in the processing of putting in a new Power 60 motor.
Some other notes:
1. I mounted the rudder and elevator servos in the tail, this turned out to be a good choice in both the S. KAOS and DB builds.
2. Because of the way I did the batteries I can balance the plane by shifting batteries and have not needed to add any weight.
3. For the DB I built the wing with no dihedral. I also used the rib jig holes to ensure alignment by slipping in dowels that extended through at least 3 ribs on either side.
I hope this helps.
Steve P.
From: SPAme...@googlegroups.com [mailto:SPAme...@googlegroups.com] On Behalf Of Barry Demers
Sent: Wednesday, September 10, 2014 7:19 AM
To: SPAme...@googlegroups.com
Vic,
So what I did was determine where the Power 60 needed to be to get the prop in the correct place. I then took the dimensions from the plans and cut a new bulkhead to the correct size for the new location. I did not use the bulkhead that came with kit.
I built-up the fuselage nose completely and did all shaping and sanding. I then used a band saw and cut the nose off leaving about ¾ of an inch in front of the bulkhead to make the removable cowl.
I then carved out the inside of the cowl to make room for the motor. I also made a 1/32 plywood face for both the cowl and the fuse and made matching holes for alignment pins. You can see these holes and dowels in the picture.
I attached some tabs to the cowl that extend into the fuse so I can attach the cowl with a couple of screws.
The cowl has an air outlet at the bottom, does not show up in the picture, to let air out directly rather than push the hot air through the fuse.
I hope this answers your question.
Steve P.
Barry,
Regarding weight, I suggest taking off anything you feel comfortable with. Electric does not generate the same level of vibration as fuel, so you can sacrifice a little strength.
My DB is 56 inches from prop spinner to rudder.
I got my DB kit from BlueJay – I thought the kit was great.
Steve P.
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Vic,
So what I did was determine where the Power 60 needed to be to get the prop in the correct place. I then took the dimensions from the plans and cut a new bulkhead to the correct size for the new location. I did not use the bulkhead that came with kit.
I built-up the fuselage nose completely and did all shaping and sanding. I then used a band saw and cut the nose off leaving about ¾ of an inch in front of the bulkhead to make the removable cowl.
I then carved out the inside of the cowl to make room for the motor. I also made a 1/32 plywood face for both the cowl and the fuse and made matching holes for alignment pins. You can see these holes and dowels in the picture.
I attached some tabs to the cowl that extend into the fuse so I can attach the cowl with a couple of screws.
The cowl has an air outlet at the bottom, does not show up in the picture, to let air out directly rather than push the hot air through the fuse.
I hope this answers your question.
Sent: Wednesday, September 10, 2014 9:49 AM
To: spamembers
Subject: Re: [SPA] Advice on which Kaos to build?
Steven, share those motor mount pics with all, I'd like to see your version. Vic K
On Wed, Sep 10, 2014 at 9:28 AM, Stephen Pacheco <spac...@pacheco-computer.com> wrote:
I’ll take a couple of pictures and send you some info later this morning.
From: SPAme...@googlegroups.com [mailto:SPAme...@googlegroups.com] On Behalf Of Barry Demers
Since I am no longer encumbered with having to work from a kit, I am spending a bit of time considering the other Kaos, currently the Killer. My plans show a tail dragger option. In electing this option I remove some slight amount of weight and transfer weight a bit further to the rear, both beneficial to the electric power build. Down side, the wing is longer than the Super, more area, that is just about a deal buster by itself. I suspect that I'd float on landing and slow down on rolls, making look real clumsy with the rudder. Through Sportsman, do I have a problem with a slower rolling plane, as compared to the Super? Maybe I worry too much. Also, its probably uncool to use a computer function to dial in flaperons using 2 aileron servos? Electric prop brakes aren't smiled on either, are they? So, if I put both planes on the balance beam I most likely come out still in favor of the Super.
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Barry,
I built my S. KAOS as trike and it was a real pain with the nose gear. I used a small servo up front “Y’d” to the rudder rather than try to get some type of pushrod all the way from the back to the front.
For my DB I have gone to a tail dragger. Less of a build problem and I mostly fly off grass, so it is less of a problem than the trike configuration.
Just as a side point the DB lands very nice, not a floater, but just a great glide to the runway. The S. KAOS should do just the same.
Steve P.
From: SPAme...@googlegroups.com [mailto:SPAme...@googlegroups.com] On Behalf Of Vic Koenig
Sent: Wednesday, September 10, 2014 3:32 PM
To: spamembers
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Thanks Bill. I recall being highly attracted to the Ultimate when DC first brought it out. To use this plane for 15 years says a lot about its competency.
Aw, Bill,had me all excited. Btw, think back on what you remember to be the best flying of the bunch. Now, do recall how much it weighed? Reason I ask is that I want to be aggressive on weight reduction, but I don't want to go too far. There is an optimum, but I'm not sure where that is for the Kaos. Suppose I can build as light as possible and experiment by adding in weight.
Thanks ,Jeff. This is encouraging. I was imagining that weight to be about a lb heavier. Come time to buy an electric motor, that lb saving will affect motor, possibly esc and battery as well.
Barry,
My Dirty Birdi is at 7Lbs 2Oz and I am using an E-Flight Power 60. This seems to be fine, but so far I only have 3 flights on the plane. I’ll update after I get a couple of more flights.
Steve
From: SPAme...@googlegroups.com [mailto:SPAme...@googlegroups.com] On Behalf Of Barry Demers
Sent: Friday, September 12, 2014 9:31 AM
To: SPAme...@googlegroups.com
Ok, here we go. Most all the plans I have are in pdf form. My typical approach is to import the pdf to my cad as an image layer, and then trace or datum to a separate layer. This will give me outlines, rib locations, etc. Then I remove the image from view and start filling in the blanks. I am now ready to fill in the blanks, but need to ask and verify a couple of items. First, duplication of canopy could be a problem. I can dig one out of the box and adapt? More critical is landing gear as reinforcing is involved. I understand that I can go to the opposite style gear at will. Tail dragger where trike was drawn, or vice versa. An excellent suggestion was to move mains to the fuselage from the wing, as that will make transportation much smarter, maybe even allow for one additional plane!
Third, two piecing the wing would improve transportation logistics.
Last, I'd like to look at making tail feathers removable.
Comments on these four points while in drawing phase would be much appreciated.
Barry
Thanks Bill. Is it considered to be good form to be moving the flying surface locations around, though? I personally don't have an issue, but from what I've been getting as posts this seems contrary. Moving the wing forward also lengthens the tail moment, shortens the prop moment.
Barry
Wow! 3% could add up considering the length of the arms. I'll need to start spinning some numbers around.
See, now that makes sense. These changes must affect the flight characteristics.
Trouble is there IS NO 3% rule now; we have voted to tighten up requirements, and are supposed to be building either to plans, or so close to the original planform that the deviation will not become an issue.
I have observed many good, active SPA members long enough to know that people are going to do what they are going to do, and there is no way to enforce a strict building code. To crack down hard would drive people away.
To some pilots, it is part of the fun to try to improve performance, and it is admittedly hard to put in the time, money, and energy to build a plane exactly to plans when you know you are building-in characteristics that (again supposedly) make a plane have inferior performance to what it CAN HAVE.
Bottom line--many of the more knowledgeable pilots simply don't build their plane exactly to plan. We are going to have to face the reality of that fact, and hope that deviations will be minor. Major "pushing of the envelope" will cause future problems.
Duane
From: SPAme...@googlegroups.com [mailto:SPAme...@googlegroups.com] On Behalf Of Vic Koenig
Sent: Friday, September 12, 2014 5:39 PM
To: spamembers
Subject: Re: [SPA] Advice on which Kaos to build?
There used to be a 3% rule that allowed us to move a wing for or aft. My electric Dirty Bird-E's fly best with the wing an inch farther forward. That's where I put them and that's well with in the 3 % rule. Vic Koenig
Duane, the temptation to modify is huge for me. For this SPA plane, however, I have drawn the outline direct from the pdf plans, and have located the flying surfaces as shown. I have chosen this plane specifically based on the fact that conventional gear is shown on the plan. Based on your post I am not going to place the mains on the fuse, but keep them on the wing. I will make them plug ins so that my transportation issues are addressed. As to formers and other internal components I believe I should be able to move those around to accommodate motors, batteries, etc.
This is my first plane within the SPA and I'd like to hold to the spirit of the "law", not take advantage of semantics. Being new, though, I need to ask questions so that I can get a feel for each.
Barry
Barry
Phil Spelt, KCRC Emeritus, Secretary AMA 1294 Scientific Leader Member SPA L-18, Board Member (865)435-1476v, (865)604-0541c
Phil Spelt, KCRC Emeritus, Secretary AMA 1294 Scientific Leader Member SPA L-18, Board Member (865)435-1476v, (865)604-0541c
Phil Spelt, KCRC Emeritus, Secretary AMA 1294 Scientific Leader Member SPA L-18, Board Member (865)435-1476v, (865)604-0541c
Phil Spelt, KCRC Emeritus, Secretary AMA 1294 Scientific Leader Member SPA L-18, Board Member (865)435-1476v, (865)604-0541c
Phil Spelt, KCRC Emeritus, Secretary AMA 1294 Scientific Leader Member SPA L-18, Board Member (865)435-1476v, (865)604-0541c
Phil Spelt, KCRC Emeritus, Secretary AMA 1294 Scientific Leader Member SPA L-18, Board Member (865)435-1476v, (865)604-0541c


Had a great flight back at 8000 feet. A slight headwind, but no storms. Just enough clouds to keep it interesting. I call it "cloud dancing." Just playing with the clouds...Jeff
<Asheville-14-1.jpg><Asheville-14-2.jpg>
Jeff, sorry about the heat issue. Here in Traverse City, MI. we have had frost advisories 3 days running, never mind this chilly rain. Maybe somewhere half way between?
Ya, Jeff wish your repair man could tweak the knob on our MI winters! Thank the Lord for Florida. Yes, we head that way for a month long respite long about Feb or March.
Phil Spelt, KCRC Emeritus, Secretary AMA 1294 Scientific Leader Member SPA L-18, Board Member (865)435-1476v, (865)604-0541c
Phil Spelt, KCRC Emeritus, Secretary AMA 1294 Scientific Leader Member SPA L-18, Board Member (865)435-1476v, (865)604-0541c
Phil Spelt, KCRC Emeritus, Secretary AMA 1294 Scientific Leader Member SPA L-18, Board Member (865)435-1476v, (865)604-0541c
Phil, we been doing this jaunt for about 10 years now. We used to tow 2 motorcycles, but Florida convinced us to sell.
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