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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@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@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@autox.team.net> On Behalf Of
> > jpaynepbr@cox.net mailto:jpaynepbr@cox.net
> > Sent: 23 July 2018 00:38
> > To: 'TERRY SMITH' <terryrs@comcast.net>; Randall
> > <tr3driver@ca.rr.com>;
> > Andrew Uprichard <auprichard@uprichard.net>; George Haynes
> > <ghaynestr4@aol.com>; triumphs@autox.team.net
> > mailto:triumphs@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
> >
> >
> >
> > ** triumphs@autox.team.net mailto:triumphs@autox.team.net **
> >
> > Donate: http://www.team.net/donate.html
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> >
> > http://autox.team.net/mailman/options/triumphs/john.macartney@ukpips.org.uk
> >
> >
> > ---
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> >
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<meta charset=3D"UTF-8">
</head><body><p style=3D"font-size: 12pt; font-family: helvetica, arial, sa=
ns-serif; color: rgb(51, 51, 51);">So what exactly is the energy co-efficie=
ncy 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?<br></p><p style=
=3D"font-size: 12pt; font-family: helvetica, arial, sans-serif; color: rgb(=
51, 51, 51);"><br></p><p style=3D"font-size: 12pt; font-family: helvetica, =
arial, sans-serif; color: rgb(51, 51, 51);">Terry Smith, TR3A  TS 5866=
7<br></p><p style=3D"font-size: 12pt; font-family: helvetica, arial, sans-s=
erif; color: rgb(51, 51, 51);">New Hampshire<br></p><blockquote type=3D"cit=
e">On September 10, 2018 at 2:01 PM Rye Livingston <ryel@mac.com> w=
rote: <br> <br><div>For what it's worth, I switched to the 9lb alloy fl=
ywheel 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 ni=
ce and fast. </div><div><br></div><div class=3D"ox-46ae33b836-x-apple-=
signature">Rye <br>PH: 530-FIND-RYE</div><div><br>On Sep 10, 2018, at 06:26=
AM, John Macartney <john.macartney@ukpips.org.uk> wrote: <br> <br>=
</div><div><blockquote type=3D"cite"><div class=3D"ox-46ae33b836-msg-quote"=
><div class=3D"ox-46ae33b836-_stretch"><span class=3D"ox-46ae33b836-body-te=
xt-content">I think I'm correct in saying one of the reasons for the he=
avier flywheel is<br>that the wet liner four engine was originally designed=
for the Standard<br>Vanguard with a two speed (low and high) gearbox with =
overdrive and also the<br>Ferguson tractor - both of which engines needed t=
o develop shedloads of<br>torque at very low engine speeds. In both instanc=
es, much heavier flywheels<br>were required. Even if the early TR's cou=
ld have got away with lighter<br>units, that would have meant having two di=
fferent units. In those early post<br>WW2 days, iron and steel in the UK wa=
s in such short supply that having a<br>'common' flywheel across th=
e range made economic sense from a production<br>cost viewpoint. Just an op=
inion<br><br>Jonmac<br><br>-----Original Message-----<br>From: Triumphs =
0;triumphs-bounces@autox.team.net> On Behalf Of<br><a href=3D"mailto:jp=
aynepbr@cox.net">jpaynepbr@cox.net</a><br>Sent: 23 July 2018 00:38<br>To: &=
#39;TERRY SMITH' <terryrs@comcast.net>; Randall <tr3driver@=
ca.rr.com>;<br>Andrew Uprichard <auprichard@uprichard.net>; Geo=
rge Haynes<br><ghaynestr4@aol.com>; <a href=3D"mailto:triumphs@auto=
x.team.net">triumphs@autox.team.net</a><br>Subject: Re: [TR] Electric Fans:=
Something Different<br><br>I believe the TR2/3/4 was more or less "bal=
anced" internally. The flywheel<br>weighs about 3x what it needs to. I =
believe they used the flywheel to<br>smooth it out.<br><br>Jonas Payne<br>P=
BR Consulting Services, LLC<br>702.882.6711<br><br><br><br>** <a href=3D"ma=
ilto:triumphs@autox.team.net">triumphs@autox.team.net</a> **<br><br>Donate:=
<a href=3D"http://www.team.net/donate.html";>http://www.team.net/donate.htm=
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s=3D"default-style"><br> </p></body></html>
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