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Re: [TR] Electric Fans: Something Different

To: Randall <tr3driver@ca.rr.com>, john.macartney@UKPIPS.Org.uk, Rye Livingston <ryel@mac.com>
Subject: Re: [TR] Electric Fans: Something Different
From: TERRY SMITH <terryrs@comcast.net>
Date: Wed, 12 Sep 2018 09:09:35 -0400 (EDT)
Cc: triumphs@autox.team.net, George Haynes <ghaynestr4@aol.com>
Delivered-to: mharc@autox.team.net
Delivered-to: triumphs@autox.team.net
Importance: Medium JzkoYxJa+9awFp30Cf0e+uptesyo3KARF/Z05/pZJ0EyqQKDmsZAmJgUmBIAersd8MiA3n+KtsPskm31mO/0y4DSRIwAe0MuXzkyJ7mJTSY73wIfA5cX3CAR gf8auPzPRvYtZdkGUuRsmtvKBYrqqNj7nev4j4oZbmuTxGqwsc0Dxtxp5nIF0b97iHXtaOM6OKJGQTZgO5fvEkC48oifcDt778N9q3gDxBrBKN+/8jAuoJTA zwU7K5egKhn/nJhzbGzLzwDq4Uaxd6nc1B2OrmoMDobxjD8ANKU=
References: <4432b804-1ddc-4cda-af70-659ee3619a24@me.com> <1072177261.91358.1536672428557@connect.xfinity.com> <CB2AEFB343924273826B28E0D08A8BC3@LAPTOPM3GPCDH8>
Hmmmm.  Interesting.  Thanks, Randall.  So I guess how much one takes off a 
flywheel depends on the effect desired.  More off gives faster acceleration but 
can make for finicky stalls and engine vibration.  None off means slower 
acceleration.  Is there a mathematical middle ground in terms of ounces that 
can be removed to optimize all variables?


> On September 11, 2018 at 12:14 PM Randall <tr3driver@ca.rr.com> wrote:
> 
> 
> > So what exactly is the energy co-efficiency of heavy vs. 
> > light flywheel?  Heavy means more torque to take you up a 
> > steeper hill in higher gear, whereas light means less mass to 
> > move on acceleration so prompter speed?  Something like that?
> 
> Heavier means the engine has more resistance to sudden changes in speed (aka
> inertia).  So you get less drop in rpm when you let the clutch out
> (especially on a hill).  Acts like more torque, but isn't really since it
> only applies to sudden changes in engine rpm.
> 
> But more inertia also limits how quickly the engine can spin up.  It takes
> power to accelerate that heavy flywheel, so a lighter flywheel acts like
> more power when accelerating (but again isn't really more power, just less
> resistance).
> 
> A heavier flywheel also tends to damp out the vibration from each cylinder
> firing, so the engine seems smoother.
> 
> -- Randall  
>
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