05-14-2013, 09:25 PM
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Junior ??? Rocketeer
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Join Date: Mar 2005
Location: Knightdale, NC
Posts: 1,470
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Dr. Bob Craddock and I decided that this engine pair from G. Harry Stine's collection was probably used on the Mark I, making it the first two-stage model rocket. The cardboard sleeve holding the upper stage and lower stage together was built in with the two engines. Only the bottom had the usual fuse the the earliest Rock-a-chute engines had.
He would not let me separate them to see if there was delay in the bottom stage.
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Carl McLawhorn
NAR#4717 L2
semroc.com
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