Torque ? Wood prop, Continental IO-240

[jiott]

Whirlwind allows multiple tightening cycles for their Nordlock washers, I believe it was up to 12 cycles. They are quite impressive as a locking device. There is no way they can gradually back off; it takes full torque reverse "pop" to cam up over the ridges before they will turn in reverse. As long as they have that definite "pop" they are still good to go. I have nothing against traditional lockwiring, but my whirlwind prop bolts did not come with drilled heads.

[efwd]

Interesting. First I Googled Nordlock washer. wow, expensive by washer standards. Then I thought, "why replace inexpensive safety wire that has worked for everyone so far with such expensive washers?". I then watched www.youtube.com/watch?v=cDlmbMV9ICU. I learned why.
Eddie

[kmach]

Nordlock washers are on the Sensenich ground adjustable prop I have , they hold tight and "snap " when undoing. A great lock washer.