finchero

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recently after getting bored with my zagi's limitations, I decided to build a fast better wing. I looked every where on the net for a electric powered delta wing with no success so I decided to build my own.
after playing with a homemade foam cutter what I came up with was as follows

wing span 29.5in
tip cord 4.5in
center cord 16in
auw (electronics and all) 36.5oz
cg 7in from leading edge

the airfoil was made from hand (thin semi-symmetrical)
center fuselage was reinforced with red coroplast for impact resistance since the airfoil is all eps foam.
wing lets were placed in the center for that jet like appearance, also made of coro reinforced with push rod wire.

the power system is as follows
mega 16/15/3 w/5.7x3 prop
castle creations 45amp phoenix
3s3p lithium polymer(10-12 cell sub-c packs would work as well)

I am very pleased with the speed and lack of fear from the likes of zagi flap.
speed is about an insane 85mph at level flight and my guess of 120mph on descent

the lithiums give me a flight time of 21-30 min
I haven't flown my zagi since

you have to be very quick on your toes, I hand launch this plane by gripping the nose and at full throttle tossing it up at about a 45 degree angle.the first flight I had a friend toss it up so I could set the control throws. each launch after that is easily done solo
this is my best plane yet, next I plane to use the same airfoil to build my first jet.
glad I used the coroplast fuselage it has saved from a few crashes and hard landings

ScYcS

http://www.rcuniverse.com/forum/tire...1302157/tm.htm

you built another one? or is this the same one from the above post?! I fear I don't understand...

finchero

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no I just love myself. actually it was a mistake, thanks

finchero

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here's an updated pic with my new canopy, less drad at the expense off 1 added ounce

john 8750

Did you say your CG is about 40-45%? How's the wing loading?
I need to know. I'm planning a delta wing soon.
Thanks.

finchero

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oh no make sure you set you cg at 15%mac no more!!! wing loading is somewhere between 17-21oz. its auw is 38oz. it flys fast and lands at a quick glide.this plane is the best I've owned it's fun, fast, aerobatic, and pretty easy to hand launch once you have it trimmed. if you build a delt make sure that a friend hand launches the first one because you'll need all your attention at the trims. the coroplast I used at the nose and along the inner cord has made this plane very crash proof. remember to cut your wing cores thin for less drag, I used a thin semi-symetrical airfoil reinforce with two carbon fiber spars.good luck

john 8750

Thanks.
Your specs were a bit mis-leading. You said that the root cord was 16 inches and the CG was at 7 inches. THats more than 15%.
Am I not understanding something?
Thanks again, looks like a lot of fun!

finchero

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http://spadslopers.com/cg.htm use this web site.my half span is 14.75", center wing cord 16", tip cord 4.5", sweep 12.5", and 15% mac. this roughly gives me 6.78 inch cg(more like 17%.but I balance it a little nose heavy so assume 15%