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Wincharger Forums => Post Your Photos => Topic started by: Chronictinkerer on October 30, 2017, 06:49:06 PM



Title: Amateur Chronictinkerer making a 6' Wincharger propeller
Post by: Chronictinkerer on October 30, 2017, 06:49:06 PM
Rube goldburg fixture for cutting the concave portion of the propeller. A 7" saw blade attached to a 4" grinder attached to a right angled bracket. Set the saw blade to the height of the profile of your cut. You will SLOWLY slide the board under the blade. Make sure the fixture is solid.  It took two setups for my particular curve.


Title: Re: Amateur Chronictinkerer making a 6" Wincharger propeller
Post by: Chronictinkerer on October 30, 2017, 06:52:25 PM
The back view of the fixture. This is the rough cut. Sanding comes next


Title: Re: Amateur Chronictinkerer making a 6" Wincharger propeller
Post by: Chronictinkerer on October 30, 2017, 07:04:58 PM
I used an automobile airfile for fine sanding. I replaced the base of the airfile with a board.   I sanded a length of closed cell foam to the profile I needed and attached it to the board with 3M #77 spray glue.  I next glued #36 grit sand paper to the profiled closed cell foam. Believe it or not #36 grit leaves a smooth finish.


Title: Re: Amateur Chronictinkerer making a 6" Wincharger propeller
Post by: Chronictinkerer on October 30, 2017, 07:15:05 PM
The airfile moves only in one axis so lock it in a channel and move it back and forth. This leaves the exact profile you set in the closed cell foam.  This procedure finishes the shape for one side of the propeller.


Title: Re: Amateur Chronictinkerer making a 6" Wincharger propeller
Post by: Chronictinkerer on October 30, 2017, 07:20:46 PM
I used an electric planer to rough cut the convex portion of the propeller. Take very thin cuts and take your time.


Title: Re: Amateur Chronictinkerer making a 6" Wincharger propeller
Post by: Chronictinkerer on October 30, 2017, 07:33:33 PM
I used an air vibrating sander to finish the profile. I again used #36 grit sand paper. An air sander is 10 times faster than an electric one.
I still need to balance and shape the ends. I will finish the propeller with Man O' War Marine varnish. I spent three days on this project to get this far. It was fun and rewarding!!


Title: Re: Amateur Chronictinkerer making a 6" Wincharger propeller
Post by: Mike on November 01, 2017, 08:31:24 AM
Your prop looks great!  Now that you have all the fixturing built, are you going to make more?  Looks like you could knock them out pretty quick.   What type wood did you use? 


Title: Re: Amateur Chronictinkerer making a 6 foot Wincharger propeller
Post by: Chronictinkerer on November 01, 2017, 10:29:55 AM
I'm like you, I only want to make one. I cherry picked a tight grained piece of Douglas Fir.  The balance on a razor blade at this point is dead on. I will see what changes when I varnish it.  So far so good!