Edmonds Aerospace Ecee

sport rocket glider

After my good experience with Edmonds Deltie, I decided to try this model from Rob Edmonds. I ordered it from Apogee Components (along with a second Deltie, a plan set for a Nike Hercules and a couple of his technical reports) and it arrived within 4-5 days.

This kit builds to a nice mini-motor (13mm) rocket glider - i.e. no parts are dropped at ejection. During boost, the movable portion of the canard is free to move. Actually, with the positioner placed under the movable portion the canard tends to have a negative incidence. The ejection charge pushes forward a body tube plug that forces the canard to positive incidence.

All the balsa parts for this kit are laser-cut, except for the nose and the BT plug. Like a Deltie, this results in a self-jigging kit that is extremely easy to build.

The only nit I have to pick is that Rob does not include an engine hook or an engine block in the kit. The engine is to be held in place with masking tape. I added an engine block to positively position the motor during boost, and I'll hope the tape will hold the motor casing at ejection.

Built: April/May, 1998
Launches:
11 July, 1998 - club launch 21 June, 1998 - MRFF-98 31 May, 1998 - 14AL-98
Modifications and Repairs:
16 July, 1998	added a little more shim to actuation plug.

11 July, 1998	added shim to actuation plug.
	Just before I left for the club launch I glued a shim (about as thick as a flat toothpick) to the actuation plug.

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Last Updated:	13 July, 1998
Author:	Alan Rognlie
Email:	arrognli@execpc.com