by kittyfritters » Tue Nov 27, 2007 1:28 pm
Further note on Guillow's thrust buttons.
Working on my very late models for the last "G" Challenge I noticed that even some of the Guillow's thrust buttons that have the front bearing extension are still useless. The shaft hole is too large and you still cannot get a reliable thrust line adjustment.
Hold the thrust button level and look at it from the side with the prop shaft through it. The prop shaft should be free to turn in the hole, but if you can get the prop shaft to wiggle, up and down, or side to side in the bearing, you have a bad one. If yours is bad the lack of lateral control of the prop shaft will be very visible. Throw the thrust button away and replace it with something (Dare or Peck are good) that holds the prop shaft laterally.
Howard