SailNet Community - View Single Post - martec feathering 2 blade prop
View Single Post
  #2  
Old 03-13-2009
Faster's Avatar
Faster Faster is offline
Just another Moderator
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 14,943
Thanks: 76
Thanked 214 Times in 206 Posts
Rep Power: 10
Faster has a spectacular aura about Faster has a spectacular aura about Faster has a spectacular aura about
We had one for years on one of our boats... it was getting old and setting up some vibration as the gap where the blades fit had opened up some... In the end we replaced it.

This was not a geared model, so occasionally only one blade would open. This set up a horrible wobble that felt like the strut was going to be torn out. We got into the habit of spinning it briefly in reverse before going forward - seemed to prevent that. The geared types ensure that both blades open together - I believe Martec makes a geared model too.

Slippery while sailing, need to be rotated to a vertical axis to ensure that a blade is not hanging down at slow speeds, and questionable reverse (a problem with most folders, not just Martec) - since we were no longer racing we were quite happy with the 3 blade Campbell prop we replaced it with.
__________________
Ron

1984 Fast/Nicholson 345 "FastForward"

".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
Reply With Quote Share with Facebook