Sig Four Star 40
Guy Fuller
Yes, reinforce back behind former F-3 with extra (scrap) plywood. Mine
broke there after around 500 flights. This was three years ago and it
has about anouther 500 flights on it now. The best kit plane I ever
built or have flown.
Later - Guy Fuller
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Jimmy1101
Hello,
I just purchased a Sig Four Star 40 and planning on puting a 46 FX on it.
Any advices on areas that need renforcment or things I should consider. This is
my First Kit and second plane. My trainer was an ARF. Thank you.
Clifford Norris
I flew mine with a 46SF and it did not need any modifications.
It's a great flying model I think you will like it.
Cliff
Jimmy1101 wrote in message
<19980216032...@ladder03.news.aol.com>...
LLKRAEMER
I really like my 4 Star. Easy to build and fun to fly.
A couple additional suggestions:
1. Use a better tail wheel assembly, I replaced the original with a Sullivan.
Just replace a little of the balsa with light ply to attach the better tail
wheel.
2. Add a servo. Mount the aileron servos in the wings to take the flex out of
the aileron control assembly.
Enjoy
JMeier7611
You will want to reinforce the landing gear block with at least "triplers", and
put a 10 oz tank in it. If you buy the "Sullivan Flex-I-Tank" you can still
get it in and out of the hole on the back. I would also strengthen the
stringers behind the cockpit with spruce so they are not so weak.
V/R, Joe
Lynwood Matteson
Jimmy1101 (jimm...@aol.com) wrote:
:
: Hello,
:
: I just purchased a Sig Four Star 40 and planning on puting a 46 FX on it.
: Any advices on areas that need renforcment or things I should consider. This is
: my First Kit and second plane. My trainer was an ARF. Thank you.
I am building one with that very engine, and found that this engine is so
heavy, that I had to move the servo tray back in the fuse (to avoid adding
weight), and am in the process of installing the battery rearward also. I
haven't covered it yet, so these mods were not too much of a problem. I
felt that I should test the CG balance of the plane before finalizing the
servo location. Do other builders do this, when using a
larger/heavier-than-called-for engine, or just add weight to balance after
the plane is finished?
Lynn
R.Hodgson
Move stuff!!!! Move batteries, servos, reciever...whatever it takes.
Only add weights when you have no other choice. Build light.
The lighter the better.
Cheers
--
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Lynwood Matteson
R.Hodgson (starshi...@netexpress.net) wrote:
: Lynwood Matteson wrote:
: >
: > Jimmy1101 (jimm...@aol.com) wrote:
: > :
: > : Hello,
: > :
: > : I just purchased a Sig Four Star 40 and planning on puting a 46 FX on it.
: > : Any advices on areas that need renforcment or things I should consider. This is
: > : my First Kit and second plane. My trainer was an ARF. Thank you.
: >
: > I am building one with that very engine, and found that this engine is so
: > heavy, that I had to move the servo tray back in the fuse (to avoid adding
: > weight), and am in the process of installing the battery rearward also. I
: > haven't covered it yet, so these mods were not too much of a problem. I
: > felt that I should test the CG balance of the plane before finalizing the
: > servo location. Do other builders do this, when using a
: > larger/heavier-than-called-for engine, or just add weight to balance after
: > the plane is finished?
: >
: > Lynn
:
:
: Move stuff!!!! Move batteries, servos, reciever...whatever it takes.
: Only add weights when you have no other choice. Build light.
: The lighter the better.
:
: Cheers
I just had a flashback!!! When I checked for balance, I did it with the
plane upright. I know common wisdom says low-wings should be done
inverted, but the plans show the balance point as the main spar UNDER the
wing. I forgot about the low-wing inverted rule, and did my balance check
upright. Did I overlook something in the instruction book that said to
invert it? Or is this plane an exception to the rule? I'll look when I get
home tonight, but in the meantime, it's buggin' me.
Lynn
R.Hodgson
>
> I just had a flashback!!! When I checked for balance, I did it with the
> plane upright. I know common wisdom says low-wings should be done
> inverted, but the plans show the balance point as the main spar UNDER the
> wing. I forgot about the low-wing inverted rule, and did my balance check
> upright. Did I overlook something in the instruction book that said to
> invert it? Or is this plane an exception to the rule? I'll look when I get
> home tonight, but in the meantime, it's buggin' me.
>
> Lynn
I have a scratchbuilt low wing and I balanced it both ways. I do
inverted first, then right side up to REALLY fine tune it.
Mark Czekaj
The Four Star is a great kit, the only problem with it is with the
engine upright as its shown the tank centerline is nowhere near the
height of the carb. After rekitting mine I installed the engine
horizontally. This setup has much better transition from idle to high
speed.
Mark
Mark Morland
Moving batteries and servos is much better than adding weight, but
nobody is perfect <g>. My 4 Star 40 (stolen, I want another) I put a
Saito .50 on. I was able to put the battery pack just behind the
bulkhead at the wing trailing edge, and that worked well.
Mark Morland
Kent, WA
On 19 Feb 1998 18:56:23 GMT, itlc...@dilbert.ucdavis.edu (Lynwood
Matteson) wrote:
>.....I had to move the servo tray back in the fuse (to avoid adding
>weight), and am in the process of installing the battery rearward also.... I
>felt that I should test the CG balance of the plane before finalizing the
>servo location. Do other builders do this....or just add weight to balance after
John Steidl
Jimmy1101 <jimm...@aol.com> wrote in article
<19980216032...@ladder03.news.aol.com>...
>
> Hello,
>
> I just purchased a Sig Four Star 40 and planning on puting a 46 FX on
it.
> Any advices on areas that need renforcment or things I should consider.
This is
> my First Kit and second plane. My trainer was an ARF. Thank you.
>
Just build the kit according to the instructions and you'll be fine. It
builds easy and flies great. The 46 FX will give you good performance, but
is certainly not too much power for the plane.
Carl D. Andrews
In article <35004c4a....@news.aa.net>, ma...@morland.aa.net (Mark
Morland) wrote:
I first flew my Four Star with a Saito 56. It flew great but required some
tail weight. 1oz on the rudder. I changed to a 40Surpass FS and was able to
take off the 1oz weight plus losing an additional 4oz of engine weight. With
this combo I can tell very little if any difference in the flight
characteristics or performance.
David Andrews
Mark Morland
Very interesting. Mine would just hover with the .50 and a 12x5
Graupner. A better pilot would have been able to hover consistently.
I regret that I had never weighed the plane. I do want to try the
Saito .56, a YS.53, or my TT.54 on the next one. I expect any of
those to pull considerably more than the Surpass 40. We would agree
that weight is the enemy!
Mark Morland
Dennis Collin
itlc...@dilbert.ucdavis.edu (Lynwood Matteson) wrote:
>: I just purchased a Sig Four Star 40 and planning on puting a 46 FX on it.
>: Any advices on areas that need renforcment or things I should consider. This is
>: my First Kit and second plane. My trainer was an ARF. Thank you.
> I am building one with that very engine, and found that this engine is so
>heavy, that I had to move the servo tray back in the fuse (to avoid adding
>weight), and am in the process of installing the battery rearward also. I
>haven't covered it yet, so these mods were not too much of a problem. I
>felt that I should test the CG balance of the plane before finalizing the
>servo location. Do other builders do this, when using a
>larger/heavier-than-called-for engine, or just add weight to balance after
>the plane is finished?
I'm running a OS .40 SF ringed engine in my 4*, and its performance is
excellent. Straight up and outa sight or knife edge until I get
bored. AND it'll fly slower than a Cub when I want to knock around.
Lands at a walking pace, and hovers in a mild breeze. More engine
doesn't equate to better performance, just more weight. Remember that
lighter is better!
Your 46FX isn't too much heavier, though, and you ought to be able to
move things around. Consider putting your battery pack as far aft as
you can (use a servo extension to reach the receiver) since that's the
heaviest item (except for the servos).
- Dennis
- Central Connecticut Radio Control Club
- AMA 563753
"Free advice is often worth the price"
Lynwood Matteson
Dennis Collin (dco...@connix.com) wrote:
planned to build a small battery box inside the space between F4 and F5,
accessing it through one of the "punchouts", then using the punchout as a
door/cover. I've already moved the servo tray from the F2 to F3 space, to
straddling the F3. That, and the battery move, just about balances out.
That should get me to the ballpark. When covered, I can finalize placement
of the battery box within the F4-F5 space.
Lynn