Old 04-08-2015, 08:29 AM
  #16  
Gray Beard
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Join Date: Apr 2003
Location: Hemderson, NV
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I made a couple from the clear plastic from a CD case and it melted enough to stick onto the thrust washer grooves and I had to peel it off. My problem isn't usually the prop hitting the back plate but the back plate hitting the cowl. My measurements are good during the build but that dumbass married to my wife tends to forget about the engine thrust angle. I always start out at zero thrust then add thrust as needed during the trim flights. That kind of messes with my measurements!!
I have noticed that during the prop testing the smaller pitched props will touch the back plate.