While patiently waiting for a new, high end phone, I have been cooking up a powered freefly glider (I have no RC parts).

I have experience in water rocketry and I have used one for the plane's powerplant. Version 5 was a high wing, T-tailed sweepwing. Just imagine a MiG-15 with its wing on top.

For fuel? Of course, water. Water with some dishwashing liquid. Actually its the foam (bubbles) that give its thrust, not the water. The water is just ~20ml.

I pressurize the rocket plane to 70psi while dangerously holding it on my hand (don't worry, these 350ml bottles explode at 195psi) and once I chuck it, the air hose goes taut, and let's go. The air hose is just held by friction. The nozzle is just 2mm in diameter, or a pen tube.

WHOOOOOSSSSHHHHHH....... Version 3 was reminiscent of my Trailblazer, it flew well (CoT and CoM aligned) and crashed into a house... lol. I scratched the design, because the booms tore the cardboard wings.

About version 4....

It had a dihedral, its wings were like a bird, and it had a good glide ratio. It was still a T- tail

But wow, the nozzle was slightly larger than the tube, and it was leaking, slightly. So when I chucked it, I was holding the air hose. That was the flaw. The plane went inverted and crashed hard onto the grass. Total destruction.

Version 5, the current one which I described earlier, has not been tested yet. Anyone want some pics? :D

So how did SP help me?

• Estimating the CoT, CoL and CoM. Also applying dihedral. Basically using what I've learned from this cool simulator.