Ldalmas

i have found an old 40 sr i would like to know if any one has had some expiance with this engine and what power should it give me?
Laurence

downunder

The true SR was the very first which was a rear induction engine made for RC pylon and C/L rat race. This then morphed into a front induction for sport flying and became the FSR (presumably the F meant front induction) but kept the same crankcase so the SR cast under the exhaust port stayed. They were all originally ringed engines (both Dykes and a normal single ring) then eventually became what OS called ABC but was actually ABN.

Almost everyone says the FSR was the best engine OS ever made. Except me, I go for the VF series then the FSR

Ldalmas

the problem with my fsr is that it is fairly power less as much as a 40 fp it is giveing me the same performance maybe a 100 revs more

Laurence