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Dale Rogers wrote:
Hi All,
Okay, I admit I'm taking the easy way out. I haven't done an
exhaustive search of the archives. Is there an easy way to
ascertain the eccentric shaft centerline, for purposes of designing
an engine mount? I've decided I want to try a plugs-up mount for
my test stand. Some things might be easier to fit in, using that
orientation.
So far, only two strategies have come to mind: take the eccentric
shaft out, and replace it with two apertures; or machine a pointed
mandrel which can be bolted to the pulley flange.
A dowel hammered into a piece of scrap plywood that was drilled accurately could be bolted to the pulley to make a nice pointer. I used a laster level that has the filter to make a straight line. Mounted it on a camera tripod off to the front corner and fiddled with it till it cut a watermark through the aircrafts lateral and longitudinal horizontal centerlines. You have to work in the semi-dark, but measuring the upthrust was done with a ruler at the prop flange. I put the laser in front of the airplane and got a vertical line cutting through the center of the airplane, and again the side offset was measured with a ruler at the prop flange.
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,|"|"|, Ernest Christley |
----===<{{(oQo)}}>===---- Dyke Delta Builder |
o| d |o http://ernest.isa-geek.org |
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