[modeleng] Re: are ye all trying to tell me something...

One thing to watch out for in your calculations will be the running
speed of the motor.... IIRC the C5 puts out about 2800rpm at 12V and
with rising voltage that will go  up in an almost linear fashion.... You
shouldn't have too much trouble with running them at 24V, they are as
stated brutally underated, all the protection circuitry on the C5 (apart
from the overheat) is there to protect the battery from motor......
chrisc

-----Original Message-----
From: modeleng-bounce@xxxxxxxxxxxxx
[mailto:modeleng-bounce@xxxxxxxxxxxxx] On Behalf Of JULIAN HARRISON
Sent: 18 November 2006 20:38
To: modeleng@xxxxxxxxxxxxx
Subject: [modeleng] Re: are ye all trying to tell me something...

Have not yet fully considered the designs for transmitting the power but
your point re worms is totally valid and I agree would not be practical
in this instant. rotation will have to go through a gearbox and probably
some form of diff to allow the transmission path to be 90 degrees to the
motor.
   
  Can anyone tell me the usual maximum revs of a crankshaft on a
traction engine so I can plan the reduction my gearbox will need from
the motor. I intend using as few coggs as pos. I may even build a belt
into the transmission somewhere.
   
  Julian
  In Leicester UK.
   
  
Clif Walker <clif.gwr@xxxxxxxxxxxxxx> wrote:
  Hi Julian,

You cannot use a Worm drive as they do not allow for overun. i.e As soon
as 
you removed power from the motor unless you are stationary, the wheels
would 
try to drive the motor and as a Worm will not drive that way, either the

wheels will lock solid or something will break

Regards

Clif
>
> I intend putting a worm drive on the spiggot and possibly buildong a
small 
> gearbox of two or three gear wheels to give the crank some welly.
>
>> ----- Original Message ----- 
> From: "JULIAN HARRISON"
> To:
> Sent: Friday, November 17, 2006 8:49 AM
> Subject: [modeleng] Re: are ye all trying to tell me something...
>
>
> We don't use soap anymore it's now handwash.
>
> Whats wrong with electric? I am considering building a engine in the
> region of 3" scale. It will have all the bells and whistles of a steam
> traction engine but not steam. I plan to drive the crank and hence
> everything else with a 12v motor from a Sinclair C5.
>
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