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Old Aug 31, 2010, 09:16 AM
Mach .09 Super Achiever
Chophop's Avatar
Pleasant Valley Modelport
Joined Sep 2006
8,440 Posts
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How About a 14% Symmetrical Wing on an E-Starter ?

I have an E-Starter sitting around that I haven't flown for a few months. So I figure why not replace the undercambered foam wing that has 10* dihedral plus droop tips, with an NACA 0014 symmetrical balsa wing at 1* dihedral ?
Wouldn't a 14% symmetrical on a 700g plane make nice slow dives that leave time to do something but jam the elevator back to keep it from lawn darting ?
All the planes I made so far build too much speed in a dive or get pretty wild on a goofed up roll.
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Old Aug 31, 2010, 12:53 PM
An itch?. Scratch build.
eflightray's Avatar
South Wales U.K.
Joined Mar 2003
12,897 Posts
Excess speed in a dive comes from weight and a lack of drag.

That undercambered foam wing will probably have more drag than a fully symmetrical one.

What is it you want to do, dive slowly ?

You will need a lot of drag, (as in dive brakes on full size aircraft or flaps), add a whole load of lightness , perhaps run a fairly big diameter prop and run it slowly in a dive, (a slow turning prop is very draggy). A lot of incidence can also increase drag.
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Old Aug 31, 2010, 02:13 PM
Mach .09 Super Achiever
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Pleasant Valley Modelport
Joined Sep 2006
8,440 Posts
The stock wing doesn't seem so good for inverted flight, causes too much change in elevator response for my level.
I did order a Laser Stik .10 in hopes for a draggy slow responding aerobat. I am just not good enough in odd attitudes for any of my snappy planes except maybe the E-Starter which can sort of break wind and snap also.
Too bad none of my radios allow on demand butterfly mode.
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