"Ed Anderson" <eanderson@carolina.rr.com> wrote:

"""
 Paul, if you have all metal type  (NOT NYLON Inserts) lock-nuts for the
 bolts and a crush plate with a recess that the heads of the bolts will seat
 into preventing  them from turning, then   it is not necessary to safety
 wire the bolts.  That is the way I flew my Ross drive and my current RD-1C
 drive.  However, You must use all metal type lock-nuts!
"""

Interesting.  Where did you get that specification from?  I was under the impression that the only time all metal locknuts were specified was when heat would be an issue.  We have nylok nuts on the prop bolts of the Eagle540, provided and specified by the engine manufacturer.  They are torqued as per the specs in AC43-13 (etc) and we haven't seen any problem with them so far during ground runs.  If the all-metal jobs are truly better and need to be used to meet some specification, I'd sure like to know about it.  This is the first I'd heard of it.  Thanks....

   <Marv>