[TR] Electric Fans: Something Different

[TERRY SMITH]

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?


Terry Smith, TR3A  TS 58667

New Hampshire

> On September 10, 2018 at 2:01 PM Rye Livingston <ryel at mac.com> wrote:
> 
>     For what it's worth, I switched to the 9lb alloy flywheel on my TR3.  I believe the stock one is 32 lbs.  I don't notice any difference getting started in 1st gear, and it does spin up nice and fast. 
> 
>     Rye
>     PH: 530-FIND-RYE
> 
>     On Sep 10, 2018, at 06:26 AM, John Macartney <john.macartney at ukpips.org.uk> wrote:
> 
> 
>         > >         I think I'm correct in saying one of the reasons for the heavier flywheel is
> >         that the wet liner four engine was originally designed for the Standard
> >         Vanguard with a two speed (low and high) gearbox with overdrive and also the
> >         Ferguson tractor - both of which engines needed to develop shedloads of
> >         torque at very low engine speeds. In both instances, much heavier flywheels
> >         were required. Even if the early TR's could have got away with lighter
> >         units, that would have meant having two different units. In those early post
> >         WW2 days, iron and steel in the UK was in such short supply that having a
> >         'common' flywheel across the range made economic sense from a production
> >         cost viewpoint. Just an opinion
> > 
> >         Jonmac
> > 
> >         -----Original Message-----
> >         From: Triumphs <triumphs-bounces at autox.team.net> On Behalf Of
> >         jpaynepbr at cox.net mailto:jpaynepbr at cox.net
> >         Sent: 23 July 2018 00:38
> >         To: 'TERRY SMITH' <terryrs at comcast.net>; Randall <tr3driver at ca.rr.com>;
> >         Andrew Uprichard <auprichard at uprichard.net>; George Haynes
> >         <ghaynestr4 at aol.com>; triumphs at autox.team.net mailto:triumphs at autox.team.net
> >         Subject: Re: [TR] Electric Fans: Something Different
> > 
> >         I believe the TR2/3/4 was more or less "balanced" internally. The flywheel
> >         weighs about 3x what it needs to. I believe they used the flywheel to
> >         smooth it out.
> > 
> >         Jonas Payne
> >         PBR Consulting Services, LLC
> >         702.882.6711
> > 
> > 
> > 
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