I thought the work I've done over the last couple of weeks might be of interest to some of you. 5 weeks ago I had yet another aluminum spinner crack. This one had lasted several hundred hours, but it seems that the stresses left from spin forming and from me making such large cuts around the blades on my prop, they are all destined to eventually fail. I really liked this particular spinner in that it turned true, so decided rather than spend $150 for another aluminum dome, I thought I would pull a mold and make an exact replica of my spinner. By the time I was done buying supplies and tooling to making the mold, I had spent many times over the cost of a new spinner dome, but the new one shouldn't fail, and if it does, I have the mold to fabricate another. Now that the mold is completed, I can produce additional spinners for myself for a relatively low cost.
I published this page to demonstrate the process, not to sell spinners as I don't have the time to go into production (and you wouldn't want to pay my labor rate!). <http://jeffsplanes.com/KR/Spinner/Spinner.html> -Jeff Scott Los Alamos, NM
