I saw a photo on another RC forum which intrigued me. I thought it was a cool-looking, unique design but, when I examined it more closely, I realized that it was two differently sized flying wings, sitting next to each other.
Still, inspiration will not be denied. I decided to try and build the plane I thought I saw. And … here we go.
//edit: I just found my initial outline sketch, made in Photoshop:
Here are my super-detailed plans, complete with approximate measurements.
I started off by making a small cutout from some 1/4″ foam and tossing it around my basement to try and establish an approximate CG for the final plane.
Next, I spent some time transferring my sketch to the Rediboard / Dollar Tree foamboard I’m using for the project.
Time to get started on the control surfaces. First, I cut out some foamboard (sans paper) and glue a bamboo skewer to one end. The (hopefully) straightens and strengthens the wobbly foam, and creates a sort of 'bevel' to accommodate elevon movement.
Next, a layer of packing tape skin.
A half strip of fiber-reinforced tape serves as a hinge.
Thanks, guys. Here are a couple more shots. This one's from just before the flight.
And this one's the launch.
I'm thinking the way to go is to extend the nose a bit, so I can push the battery farther forward. I'd pull weight off the tail but it's all RediBoard with the paper off and a few bamboo skewers - not much there to remove.
Is not the fact that is flies tail heavy suggesting that it is not actually a 'double' wing but a single wing with a large, close coupled, flat section tailplane?
And your point would be.....?
The "fact" as inferred here, that it is "tail heavy" due to it's suggested "tailplane" appearance........"single wing", does not define "tail heavy" just because it appears to be a "close coupled flat section" airfoil design....!
It certainly appears, to the viewer on this end, to be more of a custom "canard" design that has a C/G aft approx. 2/3rd's it's fuselage length......thus the "tail heavy" aspect.
Mark.........impressed with the design, and (be it a handful) without more forward weight/length.......it flies......!
Been following this build of yours only because it's outside (the wheel house) of what I come to appreciate from previous Basement RC models......Double Wing caught my attention as related to a "bi-plane" concept............
Alright, guys. I took it out today with the new, bullnose mod which allows me to push the battery forward another couple of inches. And it flew Fan--tastic!! One upside of having to use a relatively big 2200mAh battery is that it flew for 12 minutes and still had 60% charge left.
(It's also got about 1/4 of a paint job...)
And thanks for all the positive comments. I really appreciate them.
I’m also quite satisfied that, at 7.5″ from the original nose, the CG is exactly where my little model predicted it would be.
Here, I’ve marked the CG, as derived from actually flying the plane, with a red line. I’ve marked the same spot on my little crude model. If you squint you can see that it falls just behind the spot I originally marked NH (nose heavy) and well in front of the spot marked TH? (tail heavy?).