Choihjin,

I remember the Smaragd but didn't realized you had lost it. Sorry to hear that. These things are real set backs sometimes for those of us that don't have a team working with them.

The rubber stock I use is from a motorcycle inner tube. The engine mount diameter is around 9cm so the rubber needs to have an unstretched diameter of around 8.5 cm. It works better when it is stretched a little to fit. Maybe a better way to state it is that the mount has a circumference of about 27 1/2 cm while the rubber tube should have something around 25 1/2 cm to 26 cm.

BTW- I have a different thread in RCU that shows how to build a soft rubber iso mount....Good luck. The OS 33GT is terrific power for the VQ. Half throttle everywhere for anything we need in Pattern

The glue is regular thin or medium ca. BUT you have got to make sure that the rubber is scrubbed clean and then sanded to remove any gloss. It will stick great to aircraft plywood