For any composite constructed Lancair engine/prop related vibration
analysis, the vibration sufferer should have performed two specific checks early
on:
1. Proper torque of the engine-mount to firewall bolts (tension can change
over time because of composite characteristics).
2, Proper torque of the engine to engine-mount bolts.
These torque checks should be done remembering that there must
not be more than three threads showing beyond the nut. perchance the nut is
torqued onto the shoulder of the bolt instead of the device it is holding.
See the engine-mount bolt example below:
Scott Krueger
In a message dated 8/1/2013 8:47:34 A.M. Central Daylight Time,
pjdmiller@gmail.com writes:
I spoke
to some of the sx300 folks last night at Oshkosh and nobody who has converted
to the hartzell scimitar (full length legacy prop) is experiencing vibration
issues. Those are lycoming 540 and 580s. I know at least four have
converted, maybe more by now.
--
For archives and unsub
http://mail.lancaironline.net:81/lists/lml/List.html