5.5 gram wing loader
 

After seeing some of these indoor coaxial spinning ultra light models, at 50-60 grams AUW, I have got a new challenge on my hands, to build it as light as possible with the standard micro motor as I can't get a hand on one of those in this country. Bugger!
Few of my recent mini Bi-planes I have built were much too heavy for what I had in mind, actually bit of the handle, but a good lesson to keep the weight to minimum for "slow-low and close" outdoor flying fun.
Much better success with few mono wing ones, I have paid more attention to minimize the AUW, but still too heavy at some 8.5 grams w/load for my liking.
The latest I just finished as another experiment and a great lesson curve, I have managed to reduce the wing load to 5.5grams per decimeter square, with an
https://cimg9.ibsrv.net/gimg/www.rcu...978be6176b.jpg
Few of my recent mini Depron creations , starting with too heavy Bi-planes.
https://cimg1.ibsrv.net/gimg/www.rcu...988468e7ae.jpg
Better success with these mono wing 3mm Depron builds.
https://cimg4.ibsrv.net/gimg/www.rcu...e54e793377.jpg
Nice but still bit too heavy.
https://cimg5.ibsrv.net/gimg/www.rcu...126877cd3f.jpg
At to 220g AUW it comes to 8.5g/dm2 wing load, still too heavy.
https://cimg6.ibsrv.net/gimg/www.rcu...a83292dac6.jpg
My new project keeping it lighter.
https://cimg0.ibsrv.net/gimg/www.rcu...94e51f657a.jpg
Hoping to keep it under 150 grams.
https://cimg7.ibsrv.net/gimg/www.rcu...68f4138ed8.jpg
Touch of colour to add on some weight, LOL.
https://cimg6.ibsrv.net/gimg/www.rcu...894fc8a639.jpg
Modification of few props while static test runs.
https://cimg9.ibsrv.net/gimg/www.rcu...c20165696d.jpg
6mm Depron cut out wheels.
https://cimg4.ibsrv.net/gimg/www.rcu...9fb83f9176.jpg
Just about ready.
AUW at 150 grams which was my target or bellow.
This model gave me a good idea to reduce the weight even further so my next target is 120 or bellow.

Took it out for couple of test runs, unfortunalely too breezy to get a real picture.
https://cimg0.ibsrv.net/gimg/www.rcu...17520afcee.jpg
https://cimg1.ibsrv.net/gimg/www.rcu...c2011df50c.jpg
https://cimg2.ibsrv.net/gimg/www.rcu...8ba42449df.jpg
Airborne!

Still didn't get a chance to fly it in dead calm, but in light breeze I have found it slightly Ail. unstable so decided to spread its wings, LOL.
https://cimg3.ibsrv.net/gimg/www.rcu...f94c604648.jpg
Further wing extension for more stability.

Took it out again in just about dead calm, during twilight, test running GWS 8x4 prop, pretty nice, used only some 80mA out of the 300 packs in 3 min. flights.
https://cimg2.ibsrv.net/gimg/www.rcu...b84d7e190b.jpg
Twilight flying.
https://cimg4.ibsrv.net/gimg/www.rcu...648c762274.jpg
Twilight test hoveron new 8x4.
https://cimg7.ibsrv.net/gimg/www.rcu...8ff4ea2bb2.jpg
Twilight.

Twilight footage test running GWS8x4. (Dead Calm 150 gramer twilight test run on 8x4))

I have never expected to have so much joy flying this model; even captured a shooting star while flying this eve. LOL.
https://cimg4.ibsrv.net/gimg/www.rcu...b2b5b3df23.jpg
Make a wish!

Latest twilight fun. (Dead Calm150 twilight run)

At 5.5 grams/dm it came too heavy to my expectation, despite being a nice flier, so scrapping it out and replacing the full frame with larger, lighter new design, on its way.
https://cimg8.ibsrv.net/gimg/www.rcu...8d6e2d65c0.jpg
New frame replacement for the internal set up.
https://cimg2.ibsrv.net/gimg/www.rcu...e1f2c50e85.jpg
Wing load reduction with the new frame design.

After further check my new flying surface area will be 37dm, 12dm larger than replacemet so the wing load will be reduced from 5.5 to ~3.6, making it much slower, as my main target for slow-low and close.
https://cimg7.ibsrv.net/gimg/www.rcu...f208a6c112.jpg
Ready for carbonizing.

Officially de-commissioned, stripped down and in the trash bin, 'finito-basta'! LOL.
https://cimg3.ibsrv.net/gimg/www.rcu...9bb2407ba5.jpg
https://cimg4.ibsrv.net/gimg/www.rcu...45722c3260.jpg
There goes my loving labor.