TT 70 engine ??
 

Anyone run or have any opinion on the TT 70 engine?

TT-70
 

I've got the 70 and the 50.
The 70 is on the stock TT pipe and a new weston pipe made for 50's (not 46) is on the TT-50H.
After 6 gallons through the 70 and 4 through the 50 they both run perfectly.
Very easy to start, break-in and tune - the high and low needles crossover the midrange nicely so it's very easy to get the perfect mix with different pipes, head speeds, and flying conditions.
They run very cool, have tons of power with just 15%, and both still have the original OS-8 plugs I broke them in with!!!!
My LHS matched Helihuts' price ($110) on the 50 and I opted for the 70 cause I've always had good luck with their airplane engines and the same shop sold me the ARF w/70 for kit price!!!
All this and a 3 year warranty you'll never need...What a value!!!
Stay away from the older ABC 46 and 61 though, the carbs' suck.
The new ones they got right on.

HAVE FUN!!!!!!!! Kirk