Paul,
   Do you have any further info or photos on the Bell gearbox Dave Lemon
will be using for the time to climb record attempt and I would
appreciate any
info and/or photos you may have on Dave Garners Bell gearboxes he built
for his Turbo 12A engines on his twin.........

Thanks,
Kelly Troyer

Not Dave Lemon. Jim Mederer of Racing Beat.

Dave Garner is dead.

Jim Mederer did the bell GB adaptations on Dave Garner's huff and puff
back in 1973.

I have tons. Here are some.


Paul Lamar

 I stand corrected !!..........I am interested in any
further info or photos you have about converting the Bell
47 box for our use on the rotary........I had some photos
from discussions in years past and have a rudimentary grasp
of what Bell 47 parts are needed and I have a Bell 47
maintenance manual with transmission parts breakdown and
part numbers but would appreciate any more info you can
supply........The output shaft to the prop is a particular
unknown to me as to if it utilizes some reworked Bell 47
parts or if it was totally purpose made.........If you
would rather not clutter up the group please E mail me
directly........

 Curious If Jim Mederer is currently using the same basic
box he designed for Dave Garner's Twin ??..........


Thanks for any help and all your work on behalf of the Rotary Group,

Happy Holidays,

Kelly Troyer

The front of the box has been redesigned for the time to climb engine.
I don't have dwg's  in case you ask.

Here are a bunch of pictures.

Paul Lamar

Paul,



 Thanks a bunch for the photos of Jim's new Bell 47 based box.......What a machining work of art (spelled $$$)........I am presuming
that the housing extension is to allow for a resonance dampening system that the original Garner box did not have as the planetary
sun drive gear was bolted directly to the 12A counterweight (unless I am seeing wrong)........Is my assumption correct ??......Do you
have any additional photos of this resonance system by chance and was the lack of this system considered a major fault with the
Garner box for normal use or considered a necessity for the power levels needed for the time-to-climb engine ??.............

Would appreciate any old or new info you have or obtain concerning Jim's new box and how the project is progressing........

Thanks Again,



Kelly Troyer

No. It is direct connect. The design life is just a few minutes.
Rubber couplings mitigate the shock load on the gears.
Not just for torsional damping.



Paul Lamar

      Paul,

Why then the extra length for the new machined housing ??.............Weight and balance perhaps ??..............

(sorry if I am a pest about this)
    Thanks,

     Kelly Troyer



Kelly Troyer
Dyke Delta_"Eventually"
13B_RD1C_EC2_EM2

The first adaptation in 1973 had insufficient distance between the two prop
shaft bearings.

Paul Lamar

The Rotary Engine News Letter. Powered by Linux.
ACRE NL web site. http://www.rotaryeng.net
You Tube http://tinyurl.com/beqqxas
Copyright 1998-2014 All world wide rights reserved.