ORIGINAL: mxaexm
I'm thinking of getting .40 for my Mid Star. I want to keep it as light as possible. Maybe OS 40fp or ST 40. I'm not a big fan of overpowering my airplan
Between the choice here, personally I'd go with the ST GS-40 - it'll have more power than the 40 FP. That said, I do have each engine and both will work. The OS is lighter if you either have one or can find one (OS no longer produces a 40 size plain bearing engine, you'll have to go up to a .46 LA for a new one and that is $20.00 more expensive than the GS-40 at Tower).
Hogflyer