Jump to content

Propeller Strut.


Recommended Posts

I made one out of west  105, carbon unis and biax because that what I had lying around but you could make one from e glass which will be perfectly adequate and cheaper. Went to Lustys and got a standard cutlass bearing and cut the carbon to length wet it out and laid it up by draping over the bearing at the right angle . Made it overnight then shaped and fitted it the next day, still working so far :) 

  • Upvote 1
Link to post
Share on other sites

Stainless not ideal down there, Bronze is perfect and strong and appears to have some vibration damping properties compared with the carbon launch ones I have experienced, the weight is negligible and down where you want it , unfortunately the two foundries that understood the requirements (both in Porana road are both closed).

Dont use HDPE for a cutless bearing or you will have to machine it half worn out to allow for the water swell, use a brass shell / rubber cutless or Vesconite both of which have decades and decades of history in that application. 

  • Upvote 1
Link to post
Share on other sites

I went to Chatfields and they quoted about a grand for a bronze one with a cutlass, a composite one was basically nothing using leftovers plus the bearing. Now I remember how I did it, I made a 150 x 6 x 75  laminate first, then hot glued the cutlass bearing onto it at the right angle and did the rest of the layup over that.

Link to post
Share on other sites

Back when it was Chatfield engineering a standard 1" strut with replaceable bearing and foot (not the shaky tongue mount style) was $320.00 plus gst circa 2006

But they owned and operated their own foundry and fully equipped fettling bay and machine shop. No longer the case.

Link to post
Share on other sites

Those look really good. I am not sure about carbon, probably a glass one would be fine as it is only for a Davidson 29. I will take photos and measurements of my existing one. Thankyou for all the good information.

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...