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C.G. on a delta wing?

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Old 10-02-2004, 11:24 PM
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green river rc
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Default C.G. on a delta wing?

I'm designing and building a 30/40 size delta wing and am not exactly sure how to balance it. I saw somewhere on RCU a formula but I can't find it, can anyone point me in the right direction? Thanks for your time.
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Old 10-03-2004, 02:21 AM
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Default RE: C.G. on a delta wing?

I don't have my formulas handy right now but i do have this illustration,give this a try for now,I will get back to you on the formulas.,Slade
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Old 10-03-2004, 02:38 AM
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Default RE: C.G. on a delta wing?

Heck,Here is a calculator with the formulas,why didn't they have this stuff 30 years ago,sure would have saved a few braincramps!LMAO!


http://www.palosrc.com/instructors/cg.htm
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Old 10-06-2004, 07:03 PM
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Default RE: C.G. on a delta wing?

Hi
Take a look to
www.crazyherb.com
this guy is a member of rcuniverse
search for "giant delta"
Happy landings
Jose
South America
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Old 10-06-2004, 07:13 PM
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Default RE: C.G. on a delta wing?

Quick and dirty:

Balance it at 25% 1/3 out from the center line.
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Old 10-06-2004, 10:39 PM
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Default RE: C.G. on a delta wing?

Sorry for not getting back sooner guys.

All of you answered my question, but.....it's really a flying wing I suppose, (shaped like a Diamond Dust) the engine is up front. About 2 1/2" of the nose is lopped off to accomidate the engine and for the spinner to blend in. I assume I just continue the leading edge line like the engine was not there to get the root cord measurement? I'll run out to the shop and snap a picture of the frame.
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Old 10-06-2004, 10:52 PM
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Default RE: C.G. on a delta wing?

If it's the same size and shape, (platform), I think I still have my DD plans I can check for the CG.
If it's 36 in span you just go 1/3 of 18 inches, which is 6 inches from the center line, measure the chord there then 25% of that.
You'll need about 3X the elevator throw than aileron in your elveron mix, these things really roll, I get about 10 rolls a second on high rates. My DD is the only plane I use Dual Rates on, it really needs it.
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Old 10-06-2004, 11:20 PM
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Default RE: C.G. on a delta wing?

It does not have the same dimensions as the Diamond Dust, I was just refurring to the basic design and shape. I'm told that if a delta is to nose heavy, it wont turn.
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Old 10-07-2004, 01:22 AM
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Default RE: C.G. on a delta wing?

Quote:
ORIGINAL: green river rc

I'm told that if a delta is to nose heavy, it wont turn.
If it's nose heavy you'll just hear splat when you handlaunch it. Deltas aren't as forgiving as conventional layouts, you got to be pretty close to get them flying, but they are FUN!
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