The Calif A21SJ with a max t/o mass of roughly 1700 pounds has 200 pounds of
thrust.
A DG800 with approx 1000 pounds also has 200 pounds of thrust.

That gives decent climb rates, but in the first place it allows to
accelerate to max climb speed on grass before you hit the fence on the far
side.

"Tony Verhulst" wrote in message
...
wrote:
1000 lbs at 25/1 Lift to drag needs 40 pounds of thrust to remain in
level flight. Any thrust above that number would result in either
climb or a faster level speed. So in theory, using those numbers,
40.0000001 pounds of thrust would get the job done - eventually.

The above 25/1 occurs at only one airspeed - faster or slower will require
more power. To self launch, you need, minimally, to accelerate to that
speed. Oh yeah, ya wanna launch from grass too? So, how much power do you
need? I dunno, but suspect that it will be a lot more than 40.0000001
pounds of thrust.

Tony V.