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Old 08-08-2006, 10:59 AM   #1
jw.
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A question for the propeller boys.

A question for you folk who play around with modified props, or if you've not done it yourself you may have seen it done.

When finishing the blade surface the concave surface is easy enough but what tool is used to produce the convex surface on the front of the blade. Given that a rotary sander/grinder will make a hollow cut and a flat sander will make a flat cut. Is it just very careful light cuts or something like a small belt sander without a backing support so the belt conforms to the curve?

Ta.
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Old 08-08-2006, 11:14 AM   #2
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Rotary sander (soft, flexible disc) is all I've ever used, it's all in the wrist action. Plenty of gentle sweeping actions.

pretty sure some of the 'alleged' propeller workers, use a large 'flapwheel' type jobbie in a big, floor mounted polishing machine, (like a mahoosive bench grinder with different grade flapwheels in each end.)
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Old 08-08-2006, 11:24 AM   #3
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Thanks Jon. I've got a buffing machine with tapered spindles, I'll see what sort of flapwheel I can get to fit it. Somehow, moving the prop rather than the sander seems more natural.
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Old 08-08-2006, 11:29 AM   #4
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For F%ck sake don't let it 'catch' an edge!
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Old 08-08-2006, 12:12 PM   #5
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Hey JW what's up? Is your angle grinder broken?
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Old 08-08-2006, 01:11 PM   #6
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Quote:
Originally posted by Johnny Rocket
Hey JW what's up? Is your angle grinder broken?
Err, when I said sander I meant angle grinder.

Quote:
For F%ck sake don't let it 'catch' an edge!
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Old 13-08-2006, 11:46 PM   #7
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Just to finish the thread. An orbital sander makes a nice even surface. 180 grit on stainless gives a good satin finish.
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