original design Foray

competition, 4-A Cluster Altitude

line drawing (.GIF) of Foray - 4A Cluster Altitude model (2k)
WOOSH (NAR section 558) held a 4-A Cluster Altitude event at MWRC-97 and I tried to design a model to compete in it. Unfortunately, my building skills are not as advanced as I might like and I was unable to complete it in time for the contest - but I *will* complete it.

The model planned uses 2 'T' motors (expected to be A10-0T or A3-4T) and two Apogee 10.5mm micro-motors (planned A2-7) in a diamond pattern - with the micro-motor tubes touching and the 13mm tubes forming the points of the diamond. It uses four forward-swept elliptical 1/16" thick plywood TTM (Thru wall To motor Mount) fins and transitions from BT-50 for the rear of the model to BT-5 for the recovery section. I intend to use streamer recovery and a load of carpenter's chalk (dayglo orange) to assist spotting the ejection.

Built:     Started in August 1997 - temporarily on hold...
Launches:
Repairs:

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Last Updated: 3 February, 1998
Author: Alan Rognlie
Email: arrognli@execpc.com
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unless otherwise noted, all images are copyright © 1997, 1998 by Jeanne Rognlie - all rights reserved