Simple Cub - scratch build but way tail heavy?

[SteveRayK]

This is my simple cub. same exact issues guess I will power up. The good thing is I am building one with my Daughter while we are in isolation. Will do everything I can to make it nose heavy. Hopefully that’ll help

Good luck with the balance, in the end mine was just too heavy at 1200 gm flying weight, in retrospect twice as heavy as it should have been. The paint was a major culprit, along with heavy foam and rear mounted servos for the elevator and rudder. It had a few very heavy landings and I gave up on it. I think if you can build a FT Cub at 800 gm or preferably less, you should be able to fly it with something in the 2312 range and 10 x 5 prop (I've since built the Corsair and it's exactly that and flies beautifully and that's with a 2200mah 3s in it.) If it's over that, then it might be a challenge, especially to land. Cubs are supposed to be light and float in the air, mine was far from that.

Yours looks great, nice job, and great to get family involved. Good luck!

 

[Hai-Lee]

The trick to making a heavy cub float is to simply increase the wing incidence angle.
When I built my first cub, (which I still have), it was heavy and tail heavy.
I added more weight by fitting tundra tyres and fitted the battery in the powerpod.
The maiden was horrible and it just did not want to slow down without a loss of control. I increased the wing incidence for the second flight and the change was astounding. It took off so easily that it just seemed to float upwards. It would slow well and even fly in reverse with a moderate headwind and the landing was so slow and it seemed to float such that I was having difficulty to get it to stick on landing.

The cub is a good serviceable design with great possibilities as a trainer but it needs to be setup correctly and allowances made for its build weight.

Just what worked for me!

Have fun!