5/20 13mm Engine Adapter

I know Estes has new plastic engine adapters, but sometimes I like to go old school.
Most all of us know a 13mm T engine casing fits into an 18MM empty casing. An 18mm casing will fit into a 24mm casing.
In this case my 13mm engine was too tight for the 18mm casing I had.

Take the tip of your knife to start the peel inside the casing.
Start the inside peel at one end using long needle nosed pliers.

Don't just pull straight up. Peel a bit and let go with the pliers.
Grab again, this time lower down the peel. Repeat.

When you get half way down, turn over the casing and start a second peel from the other side. You should meet the peels in the middle.

You'll still have to friction fit the engine in the larger casing.

Fred Shector made this suggestion on TRF:
TIP: Start the masking tape just over the top of the casing. this prevents the tape from rolling back over itself inside the mount.
It also make for easier removal after the flight.
Don't cover the ejection charge!





Here's the 13mm A10-3t engine in the 18 mm adapter.

Believe it or not, this A10-3t engine in the larger casing actually weighs less than a 18 mm A8-3 engine!