Good Gawd ! ?
Whut wuz that there recipe fur anyhow ?
Do it make good bar-b-q?
-----Original Message-----
From: Ryan Smith [mailto:shmitty99@hotmail.com]
Sent: Tuesday, June 01, 1999 8:32 PM
To: spitfires@autox.team.net
Subject: Re: Rotational inertia?
Here's a mathmatical proof.
for a purely rotational example:
KE=0.5Jw
Where KE is kinetic energy, J is the MASS moment of interia, and w (actually
omega)is angular acceleration defined by vL (where L is the distance from
the center where the velocity is measured).
Ok assuming your engine can only produce a finite amount of power which is
energy per unit time, KE is constant or at least has a finite limit. The
mass moment of intertia for a disc is J=0.5mR^2. So if the amount of mass
is reduced and the radius stays the same the angular acceleration must
increase to equal the constant KE.
This is simplified since a flywheel is not a true disk but it mass moment of
inertia obviously is still a function of mass.
Ryan Smith
72 Emerald Green Spitfire
Mechanical Engineering, VPI&SU
>From: Kma4444@aol.com
>Reply-To: Kma4444@aol.com
>To: sPITFIRES@autox.team.net
>Subject: Rotational inertia?
>Date: Tue, 1 Jun 1999 18:45:21 EDT
>
>Technically , it is the moment of inertia . A flywheel that weighs 15 lbs
>and
>carries it's mass at the extreme egdes as does the 1500 wheel . has a much
>higher MOI than does a 15 pound flywheel that carries it's major mass
>closer
>to it's centerline .
>A flywheel and clutch package that lowers your MOI will indeed make your
>vehicle accelerate quicker , all other things being equal .
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