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Old Feb 13, 2003, 11:34 AM
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Aurora, Ontario, Canada
Joined Mar 2002
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Catapult hook position and construction

I'm doing a bit of scratch-building (mentally right now) and doing a rough set of drawings to see if I have enough dta to start a prototype.

Anyway, one of the things that I haven't been able to find a lot of information on is the catapult hook.

When I flew sailplanes, the usual hook was about an inch or so of 4-40 rod, end-threaded, which was bent to give about an inch of wire to hook the bungee's ring unto. The threaded end of the hook went through the bottom of the fuselage and through a blind nut with another nut providing the locking to keep everything from coming apart too easily. Positioning was in front of the CofG, about an inch or so for the cautious types, up to just behind for the competitive types.

The blind nut went into a short section of basswood or plywood (abut 1/4 thick by one inch wide) which was tied into two bulkheads to spread the load.

Now, for EDF's, is such an arrangement workable?

If anyone has pictures of their installation (inside and out), or scans from the instructions or plans, it would be greatly appreciated.

I'm sure that there are lots of newbie lurkers (like me) who'd like to pick up the knowledge of more experienced fliers and builders.
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