Semroc Goblin Build Part 4 Engine Mount Install

This is both finished engine mounts.
The D engine mount at the top has the thinner RAH-5055S rings.

The 5055 rings in the original Estes kit were thicker like the 18mm adapter shown below.



The D engine mount is installed in the rear of the 55 tube in Step 15.

Again I used the flat side of my sanding block to be sure the BT-50 engine mount tube and the BT-55 main airframe tube ends were even.

Note I haven't glued the fins on yet.
I've found it easier to mark the fins alignment lines after the mount is in place.

You don't have much time to center the engine hook between two fins and get the tubes flush before the glue sets up.
With this method you use a wrap around fins marking guide.
Rotate the guide until the engine hook is centered between two fins, then mark the four fin alignment lines.