They were good engines...ran perfect...they were about
the first carbs that had the double needle set up.
O.S. had just come out with the 7B carb in the FSR's
but everyone else had single needle stuff with airbleeds
and rotating disks and stuff, like the K&B's and the
Perry carb ones.

The S.T.'s were big in control line contest stuff, at the
time....but weren't big sellers in R/C mainly because
they were UGLY !!! I bought this engine, and
a .61 S.T. at the original Hobby Shack in Fountain
Valley, Cal. for $34.95 each. I ran the .61 for almost 25
years in a Rebel Biplane, and it still runs perfect.

My friend has it now, and still flies it ! I'll clean the
little one after while....gotta get some yard work done
today....and I'll post another pic.

Dave.