which engine is stronger, YS 91 or Saito 100
Michael;
All I can tell you is I've always enjoyed the AC. Now a small point of Interest was that all of the Okinawan's that I just left in April changed out their AC engines for FZ last year. Why? I can only say by flying the FZ it's uplines and response surpassed the AC on F3A aircraft. They increased the pitch of their props by 1 or 2, some even went to 13 or 14 12's. The Japanese are very particular when it comes to having the best(finicky is more the word). They spend $2K just on an F3A 60 size Acft and put 91FZ on them. There was one F3A aircraft that was $10K it was all Carbon Fibre(Off subject). But all said and done the FZ is suberb, doesn't miss a heartbeat through the whole tank. With a tuned pipe it is quiet and sounds great.
Have Fun
BTW Michael my Son-in-law which I taught him and partially was teaching my Grandson live in Marysville. They fly mostly at Beale.