I prefer to have the upper ring a little lower, overlapping the upper bend of the engine hook. It's a stronger mount when the hook can't tear through the engine mount tube at ejection.
I used one of my Odd'l Rockets heavy wall BT-20H tubes for the engine mount.
To get the 20/50 ring to fit over the slightly larger outside diameter, the inside of the two rings is peeled. It's an easy adjustment, just don't peel off too much.
The picture on the right shows the ring overlapping the top of the engine hook. The penciled box shows where the hook is underneath.
On the left - the Kevlar line is tied off. The line is passed through the notch in the ring. Glue the ring in place.
The lower ring has a 1/8" segment cut out of it to allow movement of the engine hook.
I glued the lower ring on about 1/8" up from the low end of the tube, not even with the end as the instructions showed.
TIP: Slide the ring into your BT-50 tube to hold the ends down while the glue dries.
Chris, is that black electrical tape that you are using, or something else.
ReplyDeleteBTW, thanks for the tube cutting walk through!
Hi Eero,
DeleteThat is black electrical tape. I prefer it over masking tape. I have cut open engine mounts on older models where I had used masking tape. The masking tape had torn, dried out and was cracking off the tube. The electrical tape will last much longer.