Originally Posted by
motoman326
Old thread but I hope it gets revived....I found one of these in a collection but I need a muffler extension for my biplane. Anybody know what is the OS equivalent?
Thanks
John
If so I don't believe there is an O.S. equivalent. I tried looking for those years ago and found nothing that matches up with the O.S. engines.
The Tower engines were made by the same company that made them for GMS so I often used their stuff or substituted Pitts style GMS mufflers or made my own extension. Someone with a mini mill could knock one out for you.
In your case you want exactly the same spacing as the GMS .76 engines.