Subject: 3.17 box
From: rotaryeng
Date: 7/26/2013, 7:18 AM
To: AAA-rotaryeng



    Looks rather cannon prof.
    What is the overall length? Should be kept to 15 inches to fit in most cowls.

    Paul Lamar



    For a test item it may yield significant data. If it shows promise we can always try
    lightening it. The drive itself is just under 13 inches.

    Milo

    That is a nice sun gear spline. Where did you get it and the mating female part? A bit
    overkill for only 300 foot pounds.


    Paul Lamar


    Paul,

    We have enough pieces now to get good measurements, so far no glitches.
    Milo

    The critical measurement is from the bell housing mounting surface to
    the prop flange. If you are using a Mazda bell housing part of the PSRU
    must be recessed into the bell housing which I think you are doing.
    Is that a Mazda bell housing?

    Paul Lamar



    Yes it is a Mazda bellhousing, but it is not the one I want to use.
    We are still shopping for a RX8 automatic bell housing, if you or
    anyone else has one, please lend it to us.

    Milo


    You should build the box to bolt to Jeff's adapter plate
    as that has built in motor mounts. RX8 auto tranny bell housings
    are hard to come by and if bought new very very expensive.


    Paul Lamar

Paul,Milo,
   I was under the impressiom that the 93-95 RX7 and the 90+ Cosmo 13B
& 20B auto trans
 bell housings are virtually identical to the RX8 auto housings.......

Kelly Troyer


The 93 to 95 RX7 are even more rare than the RX8.
Same goes for the 90+ Cosmo.

The best thing to do is use Jeff plate and forget about a bell houising.
Sooner or later you are going to need a motor mount. Our universal motor
mount is designed
to be used with Jeff's adapter plate. It is the lowest cost way to go.


Paul Lamar


All,
We sold the engine off of our test trailer and still have the engine mount. We have an early model bell housing, but we do not know if the starter mount will marry up to the RX8 engine we have located. Jeffs set up is fine but our test of the 3.17 drive we are scrapping together with odd parts just to test the drive on a test stand, not in an airframe.

Milo



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