MPC USS Enterprise Build, Part 2, Interesting Parts

Here's the fin can with the engine cap lock ring in place.
Look at the inset picture. There is no internal engine mount tube.
The engine sits centered between four plastic ribs. No engine block, the top of the ribs wrap over the top of the engine.


The locking engine cap is much like the Quest and Estes style.
Two tabs fit in notches. The cap is turned to lock it.
Look inside the fin can on the left. For a more secure fit, you'll want to turn the cap to the left so there is more locking area to the next rib. Turning to the right might lead to an ejected engine.



The model is designed with an upper and lower body tube joined by the light blue connector. It's a LONG model with a lot of area to pressurize at ejection. A Quest engine (Chinese Sky engine) might not eject the parachute.
I'll make it a mid break using a split BT-60 coupler.







The inside of the tube shows the rolled thin wall plastic.

The print seam on the lower section overlaps the illustration.