Subject: Flex plate weights
From: Rotary Engine
Date: 6/15/2008, 6:34 PM
To: AAA Put this in the To box


Paul,

Do you or anyone know the weight of the automatic flexplate with the
starter ring attached?

Thanks

Doug - shaking  in Japan.

I have one up at the hangar but not planning on going there
in the next couple of days. Figure the volume of a 12 inch disk of 3/16 thick
steel at a density of .3 pounds per cubic inch. Then take half of
that for the large holes and you will have a good guess.

Paul Lamar

On my old spring style postal scale my AT flex plate weighs 1.83 kg [4 #].
Interestingly the balance that it bolts to is also 1.83 kg. The bolt
ring weighs .12 kg [.264 #]. and the six bolts that hold these three pieces
together are .12 kg too.

John

6 x 6 x 3.1416 x .187 = 21 cubic inches at .3 pound per cubic inch is 6.34 pounds
half of that is 3.17 pounds not that far off :)
-- 
Paul Lamar ...No rotor no motor.

Doug,
1792 grams, 63.21oz, 3.95lb.
George ( down under)

The flexplate weights vary by generation (and year?).  Here are a few I
have measured:
S4 - 1913g + 120g plate + 122g for 6 bolts
S5 - 1891g + 242g plate and 6 bolts
S5 - 1840g + 256g plate and 6 bolts
S6 - 2251g + (bolts included?)

Here are the numbers for an 87NA automatic rotating assembly:
Front CW + washer - 1274g
Front Rotor "D" - 4609g
Rear Rotor "C" - 4633g
Rear CW - 1861g
flexplate - 1913g + 120g plate + 122g for 6 bolts
eshaft - 6788g

Cheers
Cary

Cary,
What other weights do you have recorded?
George ( down under)
Hi George;

I almost addressed that last bit to you :)
I have weighed a lot of stuff - unfortunately, my record keeping is not
as good as my gram scale measurements.
What in particular are you/others looking for?
I have never bothered to collect a full set of letter rotor weights
measurements.

Cheers
Cary


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