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another spa3d le question

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S.P.A.D. Aircraft - Coroplast design Discuss the growing area of S.P.A.D.S. (Simple Plastic Airplane Designs). Coroplast type aircraft, pizza box planes, etc..

another spa3d le question

Old 03-26-2004, 10:44 AM
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red_guy
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Default another spa3d le question

hello guys,

after having a great time with my qhor (and i'm still having fun with it) i decided to make a spa3d.

i don't like creasing the flutes. i use a hobby drill and a dental mill to cut away one side of the coro. it works great for me, its fust and clean building. also it doesnt break at impact. it is very strong

is it ok if i cut one flute and bend the wing at 90 degrees so i will have a square leading edge???

doing so will the wing fly as well as having a round shaped LE???
regards
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Old 03-26-2004, 04:44 PM
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Scott Crownover
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Default RE: another spa3d le question

Leading edge shape isn't too critical, specially for ships flown slow and in high angle of attack as these. Probably will fly just fine, but I'm curious why you want to go to all that work and give up at least some residual strength. I crease em with a phillips screwdriver in less than 5 minutes.
Don't get me wrong, you may be contributing a good idea here. Let us all know how it holds up.


SC
Old 03-29-2004, 07:16 AM
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Default RE: another spa3d le question

it holds just fine. i've done this on my qhor and it didnt break. i have a tight working stace and i dont have clamps to hold the wing on the table. so cutting the coro with a hobby drill its easy for me

thanx for the reply
Old 03-30-2004, 02:38 AM
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Default RE: another spa3d le question

I also dont have a big working space but creasing the LE is easy fast and works great with the SPA3D, and most of the planes I now make is also rounded the same way

You might find it fine for the flying of this plane, but its a lot of drag on the LE, cant see any good reason for it,
Old 03-30-2004, 04:05 AM
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Default RE: another spa3d le question

Hi , have just built one of these.
Use a screw driver as Scott suggest ,is easy and dam quick.
Look at the leading edge on attached pic .
Perfect half round !!!!!!! [8D]
cheers torp.
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Old 03-30-2004, 04:13 AM
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Default RE: another spa3d le question

like I said, cant se a good reason not the crease the LE
Old 03-30-2004, 09:30 AM
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Default RE: another spa3d le question

I to, cut away the coro at my leading edges, it gives a real nice smooth edge and for strength haven't had a failure with the 30-40 planes I built this way, even had a nasty midair with a friend the leading edge stayed in tack,had a few rips in the wing skins and both fuse's came down in piece's like heavy snow.
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Old 03-31-2004, 12:43 AM
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Default RE: another spa3d le question

both you're planes have nice LE not the square shown by mean_machine. to cut the flutes makes to coro very easy to work with, and even if you cut 20 holes by mistake it will still the twice as strong as balsa
Old 03-31-2004, 07:29 AM
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Default RE: another spa3d le question

well, i exagerated a little with that LE of mine. one flute cut away wont let the coro bend at 90 degrees. it will be a round like shape.

with my first spad i tried to crease the LE and it was a pi$$ poor job. the wing came that bad the plane didnt fly at all. after that i started cutting the flutes and never had a problem

i wanted to know from the aerdynamics point of view, not the strength point of view. since i am the only spadder in my area the balsa guys dont stand a chance in a mid air crash [:'(]

regards,
mean
Old 03-31-2004, 07:30 AM
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Default RE: another spa3d le question

well, i exagerated a little with that LE of mine. one flute cut away wont let the coro bend at 90 degrees. it will be a round like shape.

with my first spad i tried to crease the LE and it was a pi$$ poor job. the wing came that bad the plane didnt fly at all. after that i started cutting the flutes and never had a problem

i wanted to know from the aerdynamics point of view, not the strength point of view. since i am the only spadder in my area the balsa guys dont stand a chance in a mid air crash [:'(]

regards,
mean
Old 04-01-2004, 08:04 AM
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Default RE: another spa3d le question

it will be ok, it should fly just fine.

After you flown it let us all know, then we all will know.

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