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Installing a Bow Thruster - West System



Installing a Bow Thruster

adobe

Island Heights, New Jersey architect, John B. Wilson, installed a bow thruster in his 26' Albermarle sport fisherman, using WEST SYSTEM® products. The toughest part of the job was cutting through the 1" solid hull laminate. After trying several tools, he had success with a Roto Zip® with a 1/4" carbide bit by making two 1/2" deep passes. The only other difficult job was cutting away a portion of the floor in the storage area under the V-berth to make room for the 5" diameter thrust tube. The Vetus unit Wilson used delivers 77 lbf of thrust. In hindsight, Wilson says he should have used the next size larger unit. It delivers more thrust and uses the same size tube, but the larger motor would have been more difficult to fit under the V-berth. Wilson's photos documented the sequence of steps in the installation:

    hole cutout for thruster tube
  1. The holes for the thruster tube were cut through each side of the hull, after determining the thruster's location.


  2. holes in hull ground to a bevel for thruster tube bonding
  3. The edges of the holes were ground to a 1:12 taper to increase bonding area and allow the reinforcing fabric to be faired flush with the hull surface.


  4. The holes for the thruster tube were cut through each side of the hull, after determining the thruster's location
  5. The holes for the thruster tube were cut through each side of the hull, after determining the thruster's location.


  6. edges of the holes were ground to a 1:12 taper to increase bonding area and allow the reinforcing fabric to be faired flush with the hull surface
  7. The edges of the holes were ground to a 1:12 taper to increase bonding area and allow the reinforcing fabric to be faired flush with the hull surface.


  8. The holes for the thruster tube were cut through each side of the hull, after determining the thruster's location
  9. The holes for the thruster tube were cut through each side of the hull, after determining the thruster's location.


  10. The edges of the holes were ground to a 1:12 taper to increase bonding area and allow the reinforcing fabric to be faired flush with the hull surface
  11. The edges of the holes were ground to a 1:12 taper to increase bonding area and allow the reinforcing fabric to be faired flush with the hull surface.


  12. The holes for the thruster tube were cut through each side of the hull, after determining the thruster's location.
  13. The holes for the thruster tube were cut through each side of the hull, after determining the thruster's location.


  14. The edges of the holes were ground to a 1:12 taper to increase bonding area and allow the reinforcing fabric to be faired flush with the hull surface.
  15. The edges of the holes were ground to a 1:12 taper to increase bonding area and allow the reinforcing fabric to be faired flush with the hull surface.






Epoxyworks 20 / Fall 2002

Copyright © 2002, Gougeon Brothers, Inc. All rights reserved.
Last Modified on 10/28/02.
Reproduction in any form, in whole or in part, is expressly forbidden without the consent of the publisher. EPOXYWORKS, Gougeon Brothers, WEST SYSTEM, Episize, Scarffer and Microlight as used throughout this publication, are trademarks of Gougeon Brothers, Inc., Bay City, Michigan, USA.


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