Good news, then bad news, then better news!
The good news: My Kwak flew great on its maiden, and just slow enough for the tiny field I use as a flying space.
The bad news: The Kwak flies just slow enough for my flying space. With the F pack, it's good for big circles around the field and that's about it.
The better news: I found a solution to my space issue!
Introducing the Biplane Kwak (clever name, I know
).
I took the plans for the Kwak's wing and simply made a second, scaled down wing. The bottom wing has a span of 18.5 inches and a chord of 5.5 inches. It's pretty tiny! You'll also probably notice that i did away with my wing floats. I did this in favor of cleaning up the airplane aerodynamics-wise and weight-wise. The foamboard that I used is also a very early batch of the FT water proof foamboard, and it's much more water *resistant* then waterproof
. That being said, this thing probably wont fly off water in the near future, so the floats didn't have a use.
The AUW went from 271 grams with the FT F pack and a 2s 600 mah battery to 288 grams with the same setup. The flight characteristics changed much more than the weight did though! It flies perfectly for me now, with the comfortable slow flight being reduced about 1/3 in speed! There was also a noticable increase in drag at higher speeds, however my style of flying is slow and lazy, with high velocites being left to the many speed enthusiasts out there
.
Overall this is a great airplane, thanks for making it possible Airc!!
EDIT: Attached are the plans of the bottom wing for the Biplane Kwak. I am working on PDFs of the position of the wing in the fuselage right now, along with a small sheet of tips and instructions for the process.