The aluminum billet version was
getting expensive. The material
alone was $66. I know I just bought some today. I had to pay $16
just to have it cut to lenght.
Then I was having trouble finding suitable 10 mm 1 mm pitch metric
screws. I never found any I was completely satisfied with. Making
our
own was getting expensive.
The welded version can use the stock 10 mm 1 mm pitch bolts as it
is
only .125 thick which can replace the stock clamping plate
The light really went on when I thought of welding the walls
directly
to the steel spline plate.
No bolts or screws needed to bolt the spline plate to the
coupling.
The spline plate is half the coupling.
Nothing could be easier or simpler.
The walls are rectangular .75" by 1.5" 4130 tubing from Aircraft
Spruce. I have some in stock.
There must be only three walls because there are six 10 mm bolts.
Here is what it looks like. It fits the stock 2 rotor flex plate
but
does not stress it. All torque is transmitted by the six 10 MM
bolts.
I will weld one up and send it to you for testing Mark.
Paul Lamar
What amazed me is the coincidences. The rectangular tubing just
happened to be the right dimensions. There are only two choice's
from aircraft spruce. 3/4 by 1 1/2 is one of them. This leaves
plenty
of room for a couple of needle thrust bearings between the spline
plate and the gear box adapter plate.
BTW asymmetric rubber bushing might work out to be the best
configuration. Most of the rubber on the compression side. The
acid
test will be the lowest engine RPM that does not cause resonance.
That does not mean it is not mitigating destructive torque pulses
at
higher RPM's. The kind that shear bolts and pins.
Paul Lamar
Carrie Beasely was right. Powdered metal. I won't weld to powdered
metal. Back to 2 pieces 4130 sheet metal. Hard as heck. I ruined a
band saw blade on it. It came with all this stuff inside for $37.
Hack saw in the lathe does not work well.
Schabs Parts 12715 old plank road New Lenox Il 60451
Paul Lamar
This fixes the clitch. New 4130 welded sheet front coupling. The
4130 2.75" OD tube .120" wall
clears the big nut and keeps the rubber from getting chewed up by
it.
This is what I will build. No welding to the powdered metal
spline plate.
Separate 4130 front coupling weldment.
Paul Lamar
The Rotary Engine News Letter.
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