Estes MRN Orbital Transport Laboratory Build, Part 6, Engine Mount, Nose Cone Trim

Here's the engine mount assembly drawing.
The rear of a single 20/50 centering ring is 1 7/8" from the rear of the motor mount tube.

Is that rear 20/60 ring really needed? Later another third ring is glued after the engine mount is in place.


I thought the dowel end would be glued along the top of the 20/50 ring, but the drilled hole goes through the BT-60 body tube and into the side of the ring. (To the right side of the dowel, into the center of the ring.





This is a dry fit of the end cap and nozzle over a scrap BT-20 tube.

The end cap will be a single layer of 110 lb. card stock.
The nozzle end is open and could  be easily dinged up on a hard landing. In a future post it will end up as a double layer, nested shroud.

The BT-60 body tube is short.
The shoulder base of the nose cone is pretty long! You'll want to have some room for wadding and the parachute.





The nose cone was slid in until about 3/4" was exposed. A pencil line was run around the body tube edge.
The nose cone base was cut off with a fine-tooth razor saw. The base was smoothed with a sanding block.