How's about adapting a flange-style u-joint to the output of the engine and
running a driveshaft? 'Course the driveshaft might get launched spinning at
9k or so, and so might the truck axle pinion and bearings.
Might be a better arrangement to use a stick-shift transmission (in granny)
between the engine and the truck axle, use the axle for brakes and measure
torque at the engine mount. Same cat.

Jack Ford

----- Original Message -----
From: <Lehanover@aol.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Saturday, January 22, 2005 11:10 AM
Subject: [FlyRotary] Re: Dynos II (was Re: changed to Octane)


> In a message dated 1/22/2005 12:08:34 PM Central Standard Time,
> dale.r@cox.net writes:
>
> Build a disc to bolt to the companion flange of a truck differential and
the
> flywheel of a rotary.
>
> How about elongating half of the bolt holes in the backing plate, in an
arc
> to conform with the bolt circle diameter. Use smaller bolts and drop in a
small
> needle bearing around each bolt/stud. Now the backing plate can articulate
a
> bit around the centerline of the axle. Mount the transducer to a bracket
> welded to the housing, and the other end to the backing plate. Calibrate
the output
> with a torque wrench.
>
> There you go. A truck axle dyno.
>
> Don't forget the math to take out the effect of the differential ratio,
lest
> you report some giant numbers.
>
>
> Lynn E. Hanover
>
> >>  Homepage:  http://www.flyrotary.com/
> >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
>