"Use a 1 or 3 watt led with a suitable diffuser. They (leds and regulators) can be found at places like dealextreme.com for less then $10 total. Maybe you'd better build your own regulator so the strobe can flash & at higher amps."

"They are not smooth probably because it is such a light airframe. you could try to put some gyros on your plane (pg-03's or similar are not very expensive). Since you already have the servos to control you plane, the outlay would be quite minimal,…"

"With slow aircraft like you want, the airfoil does not matter too much. It all has to do with low reinolds numbers. A flat foam plate curved to have a 4% height at 40% of the chord gives good results, but you can leave it flat if you like too. 150…"

"So why do you think that a quadrotor would be suitable? It is still a helicopter-like contraption, and you need active stabilisation to stop it from crashing. I think you would be better served with a large coaxial heli, but you will be hard pressed…"

"If you are look ing for stable and cheap airframes, head over to the scratchbuilt foamies section at rcgroups. the best thing would be to go for a trainer-like plane, but with a full fuselage to stuff the gear in. The blue-baby springs to mind, but…"