S.P.A.D. built a Darvistator. - Page 2 - RCCanada - Canada Radio Controlled Hobby Forum
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S.P.A.D.s Discuss SPADS

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Old 07-01-2008, 05:29 PM   #11
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Re: S.P.A.D. built a Darvistator.

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Thanks for the vote of confidence I havent flown in 10 years. I went to visit a friend and he had a SPAD ready to go and after 4 tanks of fuel I went and bought a Discovery.I have half a gallon of fuel threw it and built a SPAD

As for the plane its a dart wing 48" the fuse is 30" the CG was 3 3/4 inches from the leading edge of the wing I put a O.S. 40 in it now and its the same I used a long motor mount.
Like I say it flys nice up high but its twitchy I can pull up and it snaps around and I swear it flys backwords.lol its like it doesnt want to fly level and smooth?

I am going to Winnepeg this weekend and picking up some 2 mill coroplast to make the wing smoother. But before I build another one I have to get some more input to what I can do to fly it better.lol

Originally Posted by voyager_663rd View Post
To smooth it out, just add another 6" to the fuse length. Will calm it down substantially.

I found (in my learning days) that these short-coupled fuses were more than I felt competent with. Lengthened them a bit and solved a multitude of (ability) problems although that first vid of yours looked quite good.
"Too much plane and not enough pilot." W.W.
"Dont bring to the field what you cant go home without." Hd.
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Old 07-01-2008, 06:15 PM   #12
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Re: S.P.A.D. built a Darvistator.

grab me some 2mm....i'm good for it LOL...we'll get together and hammer a few together!

Bill......AKA "WW"
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Old 07-21-2008, 11:27 AM   #13
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Re: S.P.A.D. built a Darvistator.

Pulling 30' of streamer behind a 10' string can help settle down a twitchy plane some. I kind of like them short - turn and reverse faster, especially during combat. My twitchiest ones were the short .25 size V-tails that I put .47's on. I like .61's on the .40 size, need I say more.

Too much elevator throw makes for wierd loops at full throw - even snaps or square loops, as well, a sharp leading edge can make them 'hunt'. A sharp spar bend will also not fly as well as one with a rounded surface or a short flat top, ie: double thin spars 1" apart.

Been flying Spads for 10 years and picked up a few hints that work. The last .50 size Spad I built has a .76 on it and I made both wing and elevator mistakes - sharp leading edge, sharp spar top surface and too much throw on a 1 1/2" elevator. Rounded surfaces and reducing the throw turned it into a ----- - albeit as fast, tight turning one with a 12x10 prop.
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Old 07-21-2008, 11:31 AM   #14
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Thumbs up Re: S.P.A.D. built a Darvistator.

Further note- wrapping & gluing coro tightly onto a wire-cut foam core makes a plane that flies as well as any balsa plane. It needs only a thin wooden spar inlet into the foam. With the flutes running span-wise, a very smooth surface and leading edge result. Score the flute where the leading edge bends over the core and it will be smooth. A bit to a lot of tension results in the best surface. Here's one I did. I'll edit to include the pic. Sorry, don't know how to do thumbnails - yet. This plane flew like a long one- table and smooth, with no hunting in level flight. It's still flying after 8 years, with a smallish .47 on it's 4 3/4 pound weight - a bit pokey though.

Last edited by Daryl; 07-21-2008 at 11:34 AM.
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