Yeah I was wondering the same thing.

The SuperTigre .75 does fairly well, if you believe the marketing hype it's rated at 2.18 bHp while the TH .75 is 2.2bHp... not much of a difference.

I have one of each on different planes and it has NO problems pulling a 7-9lb plane around (Skybolt ARF) w/Unlimited Vertical let alone a .40-.46. as the poster asked about.

I think that the ST .75 is being confused with a four stroker of the same size.