I have used small OS 2-stroke engines for many years. With no scientific records
kept, I have an impression that the .15LA and .25 LA seem more likely to suffer
flameouts in flight than the .15CVA and .25FX engines. Does anyone else have any
experience on this issue?

P.S. Please don't bother to tell me that every model must have the heaviest, most
costly engine that can be bolted to the firewall. Sometimes the LA engines are just
the right size.