I have been adjusting the pitch of my DUC prop and have noticed that the bolts are no longer holding their torque and the washers stay flat when loosened.

Does anyone know where to order replacement washers and how many times you can loosen/tighten them before you should replace them?

Views: 808

Reply to This

Replies to This Discussion

Glad I could help.

I have around 15 hours on my Viking 90 with a DUC Flash prop and havent had any issues with the bolts loosening up, but I too would prefer safety wire to make it a sure thing.   I have considered drilling holes in the bolts to do just that but am afraid of what it might do the the strength of the bolt head.

I did buy a large quantity of the standard Bellville washers and replace them every time I take the prop off or change the pitch at Loren's suggestion above. I think a pack of 50 was $13. Cheap insurance!

Jan, why do you use Belleville type washers versus Nord-lock type?  What's the advantage?

I dont think that was Jan's choice.  That is what Duc-Helices supplies with their props and prop bolts.  I suspect it's just going with what the manufacure recommends.

RSS

New from Zenith:

Zenith Planes For Sale 
 

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


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, Dynon and Garmin avionics, and more.


Zenith Homecoming Tee:


Zenair Floats


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


Builder & Pilot Supplies:

Aircraft Insurance:

 
 

West Coast USA:

 
Pro Builder Assistance:

 

Transition training:

Lavion Aero

K&S Aviation Services

Aircraft Spruce & Specialty for all your building and 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.

© 2024   Created by Zenith.Aero.   Powered by

Badges  |  Report an Issue  |  Terms of Service