View/reply online Reply to forum at MaintenanceTips@skywagons.club Reply directly to hilltop180 at firstname.lastname@example.orgGear shake is common to the 170, 180, and 185. I have seen it on all three types. My 170 has 6.00-6 tires, wheel pants, and cruises at 105mph indicated, the gear shakes. My 180 has 8.50-10 tires with 10" wheel adapters, cruises at 150mph with a P-Ponk 520, the gear shakes, my 185 on 8.50-10 with 10" wheel adapters did the same.
All three planes have the shims properly tapped into place and the gear is not loose. The gear has a positive angle of incidence of its own and the buffet is probably the gear stalling all the time and/or it could be a vortex-shedding issue that might go away with Snider full length gear fairings but I have no experience with those.
View/reply online Reply to forum at MaintenanceTips@skywagons.club Reply directly to Grant Wittenborn at Grant.Wittenborn@gmail.comI thought I'd resurrect this thread from 2006 in case any new information has come up.
I've got 8.50 x 10 tires/wheels installed on a newly acquired 185. I noticed that in smooth air in cruise I have an airframe vibration at about 1 HZ with an amplitude large enough I can feel it in my seat and see it moving the instrument panel. I look out the window and the gear is moving at the same frequency.
I'm suspecting an aerodynamic influence (vortex shedding) on the tires that is generating this movement. Couple that with the large mass of the tire/wheel combination, the long arm of the gear leg, and it's easy to see how a shake can develop.
One suggestion I've seen is to put a hub cap on the wheel to smooth the airflow around the cylindrical wheel. Any other ideas besides checking the wedges on the gear attach points?