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1. 12:36 PM - Re: torque on various bolts (icrashrc)
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| Subject: | Re: torque on various bolts |
Dana,
Sorry, i guess i wasn't clear. Cristals original question asked about both AN hardware
for motor mounts AND prop mounting hardware. I aksed for a chart suitable
for AN hardware as Aircraft Spruce lists it AND gave an example of what one
particular prop manufacturer specs. She's already been told more than once in
posts previous to mine that the prop manufacturer specs the proper torque value
for thier prop. I guess i should have left the Warp example out of my post
so as not to confuse you.
Scott
do not archive
[quote="Dana"]At 06:59 AM 11/22/2008, icrashrc wrote:
>
>
> This chart only goes up to 90,000psi bolts yet Aircraft Spruce lists AN
> hardware @ 120,000psi. Anyone have a chart for 120,000psi bolts?
>
> BTW, Warp shows AN 5 prop mounting bolts to be torqued to 200 inch/pounds.
>
>
The values in that chart are NOT suitable for propeller bolts! Prop bolt
torques are based on the required force to properly clamp the prop without
crushing it, which will be different depending on the prop
construction. Use the manufacturer's recommended torque values and nothing
else.
For wood props, here's a good writeup from Sensenich:
http://www.sensenichprop.com/sen_html/aircraft_cet/install/cf-a.pdf
-Dana
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http://forums.matronics.com/viewtopic.php?p=215892#215892
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