Dragster @ 310 mph !
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Dragster @ 310 mph !
Apologize in advance for CNN's ad-based video intros .... be patient.
http://www.cnn.com/video/#/video/spo....race.crash.ap
bubba
http://www.cnn.com/video/#/video/spo....race.crash.ap
bubba
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#8
I had the same thing happen to an unmanned scale C02 rocket dragster that I built in the Power and Energy class in the 8th grade. Mine was an undetectable mill flaw that weakened the frame. If I'd milled it down probably another .001" then I would have seen it and would have scraped that entire frame. But then normal material would have probably been to weak if it was .001" thinner........ I was pushing the envelop to save weight and win. Hard lessoned learned the easy way.
Last edited by PSS-Mag; 09-18-2007 at 07:49 PM.
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Originally Posted by BROTHERDAVE
cant be brittle and flex
made from chromoly which is strong and flexable.
chromoly is not brittle
made from chromoly which is strong and flexable.
chromoly is not brittle
There is a point of rigidity they try to create, but allowing for flex. If there is a flaw either from the mill or if a welder accidently crystlizes a joint, then as it flexes back and forth it will eventually snap.