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Bill,
I'm guessing
1. the timber is firmly attached to the flywheel/flexplate at the opposite
end of the
scales or the centre ( centre would be better).
2. That the timber itself (with screws) was balanced e.g equi-distance each
side of the flywheel etc.
3. That the timber went through the centre of the heaviest section of the
flywheel/flexplate (counter weight), which was closest to the scales.
Mind you I had to read it a couple of times, but it's a good idea when
changing form manual to auto flexplate to check for this.
I think I will rig something up to check for myself - thanks for the tip!!
George ( down under)
I bought an RX-8 counterweight and at the same time I bought a '86 to '91
flexplate. (I thought.) Apparently, I have an RX-8 flexplate instead.
Thus, if anyone has a spare flexplate that will fit the RD-1C at a
reasonable price, I'd appreciate it.
>>>> Simple way to measure the moment of the flywheel and counterweight
<<<
Since the flexplate was wrong, and there are no numbers on any of the
parts, I wanted to make sure I had the correct counterweight.
I figured out a simple way to determine if I have the correct
counterweight. I bought a lawnmower blade balancer at the corner hardware
store. (It is a plastic cone on a spindle.) I put the manual flywheel from
my RX-8 engine on the balancer. I put a laboratory scale next to the
flywheel. I put a small spirit level on the flywheel center. Using a strip
of wood with a pair of screws in it, (one just for balance) I leveled the
flywheel by touching the scale with the tip of one of the screws. I
twisted
the screw in and out until the flywheel was perfectly level. The scale
read
5.9 oz, and the screw was 8.5 inches from the center of the flywheel.
Thus,
the counterweight built into the flywheel had a moment of 50 in-oz.
I then set up the auto counter weight the same way. I got 5.76 oz. With
the 8.5 inch distance to center, this worked out to 49 in-oz. Considering
the crudeness of the measurement set-up, these numbers are the "same."
Thus, I have the correct counterweight.
It looks like they sent me a "matching" RX-8 counterweight and flexplate.
Bill Dube <LED@Killacycle.com>
http://www.killacycle.com/Lights.htm
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