RE: 2.4 Gasser that has the reliability and quality if the DA-50?
keep the weight down - the lightest -most power is the EVO 1.6 on a pipe total weight inc pipe is 50 ozs.
On under 11 lbs it should do what you want - at ten lbs (which I am flying in a Showtime )-it is very quick -straight up
Next up is any engine close to same weight (the EVO is 32 ozs -a Roto 25 is 8 ozs heavier but has about same performance - piped
No in cowl stuff please--unless you go to a 40 n in cowl muffler -- then up goes the noise
Brison is 3/4 lbs heavier than bare EVO - ZDZ40 a bit less
The main thing - keep-the -weight- down.