Re: [Titanaircraft] Re: rear wing hold-down bolts

Guy,

I was also thinking that 60-85 ft. lbs seems like a lot of torque for an AN-6 bolt. Wouldn't an AN-6 bolt yield, break, or pull the threads off the nut at that torque?. From my engine building days, I recall stock small-block Chevy 3/8" hardened connecting rod bolts were torqued to 45 ft.lbs, and high-performance, high-tensile strength connecting rod bolts in after-market rods may be torqued as high as 55-60 ft lbs. Our AN-6 prop bolts are torqued to just 30 ft. lbs. Anyway, just a thought or brain exercise (I need a lot of that). :-)

--Kimberly

----- Original Message -----
From: Guy
To: Titanaircraft@yahoogroups.com
Sent: Sunday, November 29, 2009 1:59 AM
Subject: [Titanaircraft] Re: rear wing hold-down bolts

The aft wing fitting attachment bolts need to be tight. If you want to torque them, 60 to 85 ft/lbs. is plenty.

The main wing bolts (the front bolts) hold wing fittings in a clevis on the fuselage. Those bolts are in double shear. The nuts only have to hold the bolts in place. There are no flight loads on the nuts. Snug them up until they stop.

-- Guy

--- In Titanaircraft@yahoogroups.com, "ls78705" <lstavenhagen@...> wrote:
>
> Hi all,
>
> JD or anyone, here's a dumb question for you. Is there a particular torque you need to tighten the wing attach bolts to? I was doing a routine inspection of the wing attach areas yesterday and noticed the rear nuts were a little loose.
>
> However, I can quite see how the attachment is done and I'm reticent to crank the nuts down too tight, for fear of bending/squishin something. It looks like the mounting plate things riveted and glued to the rear of the wing fit flat against the tabs on the cage in the back, and so could (should?) be tightened pretty snug like the front ones are.
>
> Help me, Obiwan....
>
> LS
>

[Non-text portions of this message have been removed]

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