Inch Pounds! Actually, the book just lists the numbers in a chart with no denotation as to whether it was inch or foot pounds. I guess real mechanics are supposed to know that stuff. I definitely got the numbers right (not too many zeros). Sorry if I caused any confusion. Just trying to help.
Rick ----- Original Message ----- From: Brian Garrett <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, November 11, 1999 11:06 PM Subject: Re: Torque Values for Wing Bolts on Mooney M-10 > Are you sure you havn't got too many zero's or should they be inch pounds > at those values? They seem incredibly high. These are bridge bolt numbers. > > At 15:58 12/11/99 , you wrote: > >According to the Standard Aircraft Handbook, 4th Edition, the torque for a > >5/8-18 Standard, Fine Thread bolt and nut (AN310, AN 315) is > >1,100-1,300(ft.lbs.). The 5/8-18 Fine Thread, Shear Nut (AN320, 316, AN23 > >thru AN31) is 660-740. > >The 5/8-11 Coarse Thread Standard is 700-900, and Coarse Thread Shear is > >425-540. The "AN" numbers is the same for coarse and fine thread. > > > >Rick > > > > > >----- Original Message ----- > >From: <[EMAIL PROTECTED]> > >To: <[EMAIL PROTECTED]> > >Cc: <[EMAIL PROTECTED]> > >Sent: Thursday, November 11, 1999 9:30 PM > >Subject: Re: Torque Values for Wing Bolts on Mooney M-10 > > > > > >> Tom, > >> > >> According to an A&P friend of mine who takes the wings off his plane every > >> winter, there are no torque values published by Erco or Alon for these > >bolts > >> (He didn't mention Mooney. Maybe they published a value.) According to > >him > >> you use the specs for the size bolt as published in the standard aircraft > >> hardware manuals. I THINK (as in - don't bet your life on it!!) that the > >> torque for the big 5/8 inch bolts is about 100 ft lbs. Not sure about the > >> smaller ones. > >> > >> I had a discussion about these bolts with a mechanical engineer friend of > >> mine, and he explained to me that the strength in the wing attach joint on > >> the Coupe comes from the friction developed between the spar attach > >fittings > >> when the wing bolts are torqued. According to him (and his text books), > >the > >> wing attach bolts are actually loaded in tension, not in shear. (I would > >> have bet money that those bolts were loaded in shear!! Shows what > >happens > >> when I bet money on something that I really don't know anything about!!) > >> > >> That's more than you asked, I know. Point is, make sure you get the > >correct > >> value and torque them properly. They're not supposed to be loose at all. > >> You should be able to borrow a handbook from any A&P and look up the > >values > >> in it. > >> > >> As always, this info is offered for entertainment purposes only... I'm not > >an > >> aeronautical engineer and am not offering professional advice. Consult an > >> aviation professional. Your mileage may vary. Rates subject to change. > >> One size probably won't fit all. Etc... > >> > >> Wayne DelRossi > >> Alon N5618F > >> > > > Regards, > > Brian Garrett > ************************************************************************** ** ** > Manager-Projects & Systems > Environmental Systems & Services Pty Ltd e-mail: [EMAIL PROTECTED] > 405 Tooronga Rd Ph +61 3 9864 5300 > Hawthorn East 3123 Fax +61 3 9822 8028 > Australia > ************************************************************************** ** ** >
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