Ok last night took the 15 "combat tuned" as the box said and put on the bench with just a prime, it was 10PM was left at factory setting 9x5 rev up wood prop 2 flips OUCH chicken stick time backed off compression still kick back a couple of flips and ran on prime
it is louder than my paw without the exhaust ring ( this has none yet either) Will do the real thing about 4PM today when I get home from work it seemed to have a sharper exhaust tone almost like a glow engine. My guess this one is really going to spin timing appears a bit hot just from a few quick bursts on primes only last night will then run against the "stock 15" same props and fuel
martin