I had a "mishap" hard landing with my 601 and need to do some repairs to the firewall area. When I removed the engine a Viking 110, I noticed bushings on the bottom two mount 3/8 inch thick. With bushings the bolts are barely long enough. This would have raised the thrust line somewhat.
Does any one else have this and if I remove them what will be the handling difference?


Views: 237

Reply to This

Replies to This Discussion

I have the Viking 110 and I had to shim the mount to get the thrust line correct with the plans, only needed a couple of washers. I think that it  is different on every plane. If it was flying correct before, and you are not changing the angle of the firewall, I would not change it. As long as you have at least 1 thread showing on the bolt, you should be good.


New from Zenith:

Zenith Planes For Sale 

Classified listing for buying or selling your Zenith building or flying related stuff...


Weather Maps

Custom Instrument Panels
for your Zenith

Custom instrument panels are now available directly from Zenith Aircraft Company exclusively for Zenith builders and owners. Pre-cut panel, power distribution panel, Approach Fast Stack harnesses, Dynon and Garmin avionics, and more.

Custom Upholstery Kits for your Zenith Aircraft:

Zenith Vinyl Upholstery Kits

Zenith Apparel from EAA:

Zenair Floats

Flying On Your Own Wings:
A Complete Guide to Understanding Light Airplane Design, by Chris Heintz

Builder & Pilot Supplies:

How to videos from HomebuiltHELP.com

Developed specifically for Zenith builders (by a builder) these videos on DVD are a great help in building your own kit plane by providing practical hands-on construction information. Visit HomebuiltHelp.com for the latest DVD titles.

Aircraft Insurance:


West Coast USA:

Pro Builder Assistance:


Transition training:

Golden Eagle Aviation

Pianosa Flying Farm

Aircraft Spruce & Specialty for all your building and pilot supplies!

© 2020   Created by Zenith.Aero.   Powered by

Badges  |  Report an Issue  |  Terms of Service