Neto

I have a new(still Italian) ST 61 rear for pattern, i just want to know how does it works?, its a powerfull engine? and does it is friendly to set up?

thanks
Ernesto Delgado

ChuckN

The ST S-61K front intake/rear exhaust engine is a good engine from the past. It's a short stroke engine that makes it's power a little higher in the rpm range than the most recent .61 pattern engines and spins much faster than a 4-stroke. Prop the motor like a regular sport .61 and not like the late great Y.S.61LS, O.S.61RF, or Webra LS Speed and you will have a fine performer.

Neto

chuck:

Thanks very much for the reply! you are the first person who i can talk about this engine. In your personal opinios...which size of prop do you recomend me for this engine?, i am going to use it for a pattern ship and obviously to fly the pattern sequence.

thanks

ChuckN

According to Supertigre you should run props from 11 x 7 3/4 to 12 x 8 with a tuned pipe.

Neto

OK perfect thanks very much!, you don´t remember your tach readings with your engine??