It occurred to me the current damper is not working as well as it should.
 Rubber is just as incompressible as hydraulic oil and the current
 rubber dampers are completely enclosed in the current design.
 There is no room for them to distort and absorb the shock.

 I think we need to copy the motor cycle style torque damper.
 Making them round makes no sense. They should be more or less
 cubes of rubber in housing large enough to distort.

 I am working on a 3D for a new design. It will be similar to
 this Yamaha design. We may be able to buy the rubber parts
 from a motor cycle parts seller.

 Paul Lamar

 Paul,

 My EM-2 showed 27gph fuel flow on yesterday's takeoff roll.  I figure
that's
 about 325hp.  Please design the damper for 350hp, or more.

 Thanks,
 Mark S Tx


 27 GPH is 162 pounds per hour assuming fuel weighs six pounds per gallon.
 162 pounds per hour at a BSFC of .6 is 270 HP. I don't think you are
 seeing 325 HP. What engine RPM was that? Manifold pressure?

 At a leaned BSFC of .5 it would be 325 HP. Are you leaning while
 taking off?

 OK Mark. Here are some rubber parts I came up with.
 I'll buy something and design around them using short peices of 4130 steel
 rectangular tubing from AC Spruce tig welded to our custom flex plate.

 If the 4130 flex plate is water jet cut the rectangular holes in the flex
 plate to locate the tubing are no problem.

 Everybody that thinks they may want one of these things let me know
 as it cost a few bucks to have the water jet program made. In other words
one
 must make a quantity to keep the cost in check.

 Paul Lamar

 Count me in.
 C. Smith

 Hi Paul,

 I will be interested in these damper plate.Do I need to do a lot of
machining to
 fit it into my drive?.If so then I will send my plate cause as you know
there is
 no much machining in Saipan.Thanks

 Michael Hart

 I will make it interchangeably.

 Paul Lamar


Hello Paul,

I am interested in the damper plate.

William Hagood

Here is revision one. Lots of holes cost very little more when laser or
water jet cutting.

If you have a damper already keep the Ford part.

Paul Lamar

Paul,     If I understand the 3D, there is a reinforced rubber piece that
has 12 rectangular holes  with the two plates inserted into the  opposite
sides of the  rubber. I am concerned that if the rubber can compress to
absorb torque pulses that it will bulg out axialy like hydraulics and force
the plates apart distorting them.  The motorcycle hubs have a lot more
material around the rubber inserts.  Also rubber inserts from a larger bike
such as a Kawasaki  KZ1400  or Suzuki Hyabuska which are near 200 HP bikes
seem like a more appropriate choice to source the rubber cushions from.

george grimes

Keep reading George. I addressed that concern.
We can mold our own with liquid silicone rubber.

Paul Lamar