Hi,
I bought a YS 91 SR two days ago, ran it in yesturday and half of today. I had four flights with it today after the run in and all I can say is OMG!!!!!!!!!!!
For lots of power and very consistant mixture running, this is the motor to have in a model helicopter. I had an OS 91 SZH fitted but was unhappy with it changing throughout the flight. I now no longer have these problems
Big smiles from Me
I bought a YS 91 SR two days ago, ran it in yesturday and half of today. I had four flights with it today after the run in and all I can say is OMG!!!!!!!!!!!
For lots of power and very consistant mixture running, this is the motor to have in a model helicopter. I had an OS 91 SZH fitted but was unhappy with it changing throughout the flight. I now no longer have these problems
Big smiles from Me


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