[SEL] Urgent engine question

[David Rotigel]

Hi Peter,
	The purpose of the weight (ie a heavier place in a flywheel) or a  
lighter place in the flywheel (ie material removed from a flywheel-- 
either by casting or by machining) is to "off set" the weight of the  
throws of the crank.
	Dave


--------
David Rotigel
rotigel at alltel.net



On Dec 30, 2007, at 4:35 AM, Peter Lowe wrote:

> Hi all
>
> My R&V vertical flywheels and crankshaft are in the machine shop being
> repaired and I need to know something urgently. They are sitting in  
> the
> lathe waiting for a reply.
> Reg and I know where they are and the machinist is an extemely  
> competant
> steam/ engine guy, but we need to make sure. My two flywheels have  
> been
> botched in Argentina and we need to get them right.
> Both flywheels are different and we are making two complete new hubs.
>
> 1.  On the flywheels, is the crankshaft keyway usually 180 Deg  
> opposite the
> flywheel counter weight.
>
> 2. Is the flywheel counter weight opposite the crank pin? so if the  
> engine
> were on TDC, the flywheel counter weights would be at the bottom.
>
> I am probably answering my own question here, but I have the crank  
> out and
> if it were facing TDC position the keyways are also on top, so the  
> flywheel
> weights would be at the bottom, YES or NO
>
> Regards
> Peter Lowe
> R&V Engine Registrar
> Australia
> Ph: 61-266453455
> http://www.oldengine.org/members/plowe/rv-engines/rvpage.htm
> http://www.oldengine.org/members/plowe/rv-engines/rv-register.htm
>
> _______________________________________________
> SEL mailing list
> SEL at lists.stationary-engine.com
> http://www.stationary-engine.com/mailman/listinfo/sel