OS 25F ABC another blast from the past!
The OS 25F ABC engine was released to the market in 1982 and a review can be read here. http://sceptreflight.net/Model%20Eng...8F%20Heli...
OS FS-40 Surpass...by accident
So I was browsing Ebay last week and saw an auction for this little engine. When I saw it the auction time was down to the last hour....
