The kit supplies six 20/60 centering rings. These are die-cut, thinner than what you might find in a current Estes kit. That's fine, the way they are used makes for a very strong internal structure.
TIP: With die-cut rings you will have one side that is slightly rounded. Plan ahead - use that rounded edge to your advantage. Push the tube in rounded edge first, not the squared edge on the other side. You'll usually find a smoother fit without rolling back the edge of the body tube.
The first ring is glued 3 1/4" from the rear of one of the BT-20 tubes.
A 2050 ring butts up against the larger ring and is glued in place.
A second 20/60 ring is pushed up against the 20/50 ring and is glued.
At the rear the same 20/60, 20/50, 20/60 "sandwich" is done again, this time with the forward ring 1/2" from the end of the tube.
The engine block is glued in.
The yellow spacer tube is marked at 1/2" and presses the block in up to that mark.
TIP: There is no engine hook on this model. While the instructions suggest friction fitting the engine for flight, I'd recommend a simple wrap of tape around the exposed tube and engine.
No comments:
Post a Comment