John Bolding
Joined: 23 May 2006
Posts: 281
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 Posted: Wed Oct 11, 2006 5:47 am Post subject: Fuel Sensor and misc |
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One of the reasons that the 701 was able to go to the higher gross weight was the removal of the fuselage tank and use of wing tanks which takes the bending loads off the spar. As fuel (or any weight for that matter)is moved outboard you have to become increasingly aware of the moment of inertia of that fuel as it relates to spin recovery.
As long as we are talking about design here someone mentioned a few days ago that the only thing jury struts did was to prevent the struts from vibrating. Actually the PRIMARY function of the jury struts is to support the struts in mid span from negative loads. Tubes are a LOT stronger in tension than compression, the aero designers I get to hang out with use the term "long column bending load" when figuring the tube size and jury strut location.
Below is an excerpt from a Yahoo site for 701 builders, seems like another seat belt
attach fitting has pulled loose, imagine that, I'm sure he didn't have the doubler as it happened a while back but the "doubler" is dubious at best in my mind . I have a 2000# strain gauge and I think I'll fab up a test panel with and without the doubler just for fun.
"FWIW I was having a conversation with a guy at the Rocky Mountain
Regional FlyIn this summer who said there was a guy in his EAA
Chapter who put his 701 down in a field, hit a ditch, and the
seatbelt anchor, built to plans, pulled out and he went into the
panel. This guy's view was the anchor was inadequately engineered."
If anyone knows this fellow please contact me and I'll get as many pertinent facts as I can. LOW&SLOW John Bolding
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