Thanks Michael,
Makes perfect sense to me. :o( That's why you guys are out there.
Alex
----- Original Message -----
From: "Michael Marr" <mmarr@notwires.com>
To: "Eureka Saws Co, Inc." <ambritts@ptdprolog.net>; "Randall"
<tr3driver@ca.rr.com>
Cc: "Triumph List" <triumphs@autox.team.net>
Sent: Saturday, November 04, 2006 01:48 PM
Subject: Re: [TR] OD Testing
>
>
>
> > OK, here's what we got. Switch lever up. (off) Start car, shift to 4th
> > gear.
> > RPM's = 2000 (just +), speed is 40 mph. Holding the gas pedal constant
and
> > engaging switch lever (down), rpm's stay the same and the speed goes to
50
> > mph. Switch lever back to up position speed drops back to 40 mph. Sounds
> > like a wiring issue. Reversed but where? Switch is colored coded so
can't
> > be
> > there.
>
> What you have described is exactly what should happen in the configuration
> you have described (i.e. constant engine speed, wheels in air with no
> resistance). In this configuration, when OD is switched on, the rotating
> element with the greater moment of inertia will maintain its speed and the
> rotating element with tyhe lesser moment of interia will change its speed.
> If you look at the rotating masses and their moments in the
> engine/flywheel/geartrain pre O/D, vs the drive shaft, diff, half shafts
and
> wheels, it makes sense that the engine speed will stay the same and the
post
> O/D drivetrain will accelerate, particularly when the engine is under
power.
> Somebody that remembers their machine design classes better than I can do
> the math!
>
> Michael Marr
> 1960 TR3A
> Plainfield, IL
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