Jet assisted take off

[BarrelRoll]

The idea is to use those small model rocket engines as micro-JATOs.
Could be useful for high wing loading UAVs.
Did anybody try this at home?

[d_wheel]

The idea is to use those small model rocket engines as micro-JATOs.
Could be useful for high wing loading UAVs.
Did anybody try this at home?

It has been quite a while since I built and launched rockets so am way behind on the latest developments. However, the motors we were using then only burned for a second or two. This would not be long enough to be of much assistance with large, heavy aircraft. If they are now producing longer burning rocket motors, then it might be plausible.

Later;

D.W.

[BarrelRoll]

I understand D-12 rocket engines can produce 20 Ns of total impulse.
http://www.a2zhobbies.com/rocket_info2.html
So technically it is possible to accelerate a 1 kg aircraft to 20 m/s (45 mph).
Is this estimate correct?

[murmur]

Barrel, your estimate is correct, but since you're going to need some way of stabilizing the "liftoff" at very low airspeeds (which sounds like some sort of "track" or "guide rail" to me), why not just use a slingshot, instead? Sure, it's a lot less smoke and noise, but aside from that disadvantage, a slingshot seems like less trouble.