Originally Posted by
1967brutus
It still surprises me, because AA5BY over on RCGroups reported a Sig LT25 to fly very well with a Saito 30 on gas...
But it might also simply be me, having a different definition of "underpowered". As long as a trainer can take off from a lawn-quality grass runway, maintain a climb at a 20 degree angle or do a loop from level flight, I consider it adequately powered.
with the fs40 on gas, it did not have enough power to climb at more than about 5 degrees and if i tried to turn at more than about 10 degree bank it would lose altitude. it was way underpowered so i don't understand how aa5by could fly the same plane with a similar sized or smaller engine. i do recall he never actually posted video of his engines running on gas....