----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]----
Here are good discussions by Stefan.. & Jan: Harry Francis Blacksburg, VA. Subj: Wing Bolt Torque Values - Final Results Date: 11/22/1999 1:25:16 AM Eastern Standard Time From: [EMAIL PROTECTED] (Stefan Fanselow) Sender: [EMAIL PROTECTED] To: [EMAIL PROTECTED] As the one who initiated the discussion on the correct torque value for the wing bolts, I feel compelled to share with the group the final results of the discussion here on the forum and of my direct communication with Univair: 1.) The wing bolts need to be torqued properly, just "tightening them really well" is not sufficient. 2.) There are no recommended values by the manufacturer, so AC 43.13-16 is the appropriate source 3.) The large and the small bolts used for the main wing attachment are indeed shear bolts. The nuts are, however, tension type nuts. This had led to some confusion during the discussion about whether to use shear- or tension values. 4.) The proper torque values are 1100-1300 inch lbs for the large bolts/nuts at the leading edge and 100-140 inch lbs for the smaller bolts/nuts at the trailing edge. Both values are indeed shear values. I have (for obvious reasons) only confirmend these numbers for the Mooney M-10. I am assuming that they are the same for Ercoupes / Aircoupes, but I urge everybody referring to this information for their own assembly to check for themselves in case the type of airplane is different. Safe flying, and have fun. Stefan in Tokyo Mooney M-10 Cadet N9547V Subj: RE: [COUPERS] loose wings Date: 12/21/2000 8:32:28 PM Eastern Standard Time From: [EMAIL PROTECTED] (jan zanutto) Reply-to: [EMAIL PROTECTED] To: [EMAIL PROTECTED] CC: [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED], [email protected] ----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]---- When your wing hardware is properly torqued, there should not be any play whatsoever. If it is loose after torque, buy new bolts first and try them before removing wing attachments. My wings and fuselage are in my garage, wait a minute................... ......................3 minutes later........................................ well I'm back from the garage. The forward bolt holes measure .623" and the bolt measures .621". That's a close tolerance fit. The aft bolt holes measure .310", and the bolts are .309". So you have a .002" fit in front and a .001" fit in the rear. I would pull your wings off and measure all holes and bolts. You can replace the fittings by drilling out the hardware. __________________________________________________ To unsubscribe from this list please send mailto:[EMAIL PROTECTED] ___________________________________________________________ T O P I C A http://www.topica.com/t/17 Newsletters, Tips and Discussions on Your Favorite Topics
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