wnorth(at)sdccd.edu
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 Posted: Tue Oct 30, 2007 9:08 am Post subject: Prop Indexing and Jacking |
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Humpf,
Prop indexing is not only a function of that which is convenient to hand
propping, which if indexed properly(there's a pun in there) will put the
right side descending blade up high and going through a compression stroke
as you pull it down, but it is also a function of crankshaft and engine
balance design.
For this reason many certified prop/engine have indexing marks to help
ensure proper(pun again) installation.
RE Jacking, I made a heavy flat plate of 3/8 aluminum that is 1.5 inches
wide and about 6 inches long with a u-bolt that straps it on to the tapered
axel just inside of the wheel. I welded some .5" edges to the bottom side to
stiffen it and provide some grip for a jack/board underneath. A couple of
bricks and a five foot 2x6 underneath this plate and I can lever the wheel
off the ground easily, and the plate fits into my tool kit easily. I figure
I can always find either a scissors jack or a board and some bricks at any
airport.
If you look at the plate end on with the u-bolt it looks like this
<[
and sideways it looks like this
1_____
with the one being the u-bolt that slips over the axel and is tightened as
close to the brake backing plate as on can get it. I do remove the brake
first, but one has to do this to get the wheel off anyways.
W
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