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Subject: 
Re: "Big Blue" Pneumatic 4-6-4 engine and tender
Newsgroups: 
lugnet.org.ca.rtltoronto, lugnet.trains
Date: 
Wed, 1 Nov 2006 17:55:40 GMT
Viewed: 
700 times
  
In lugnet.org.ca.rtltoronto, David Koudys wrote:
In lugnet.org.ca.rtltoronto, Anthony Sava wrote:

<snip>

I have a suggestion for the performance issue, but I'm no engineer so please
forgive me if it won't work.  Have you tried adding more weight above the
drivers?  I don't know how much those cylinders weigh, but they're full of air,
which can't help things any.  Perhaps the slippage is caused too little of the
engines weight is being distributed over the driving wheels.

I had a similar problem with a small train MOC of mine where I had the motor in
the tender, which was little more than the motor itself.  There just wasn't
enough weight on the motor and it kept slipping.  Troy has told me he sometimes
adds rolls of pennies to his MOCs to make the motors more efficiant.  Granted,
this is all about 9v motors, but the theory seems to be the same, at least to
me.

--Tony

Great ideas Anthony!

I did put a LEGO boat weight right on top of the drivers, and the 9v motor is
pretty close as well.  I haven't looked at it in a few days, but plan on
modifying it before the weekend to see if I can get it to do a complete circuit.

Thanks for responding!

Dave K

Another idea (and I'll stop after this, I promise!) would be a bit harder to
implement, but may work in the end.  How about removing one of your trailing
pairs of wheels and redesign in a fourth pair of drivers, making your train from
a 4-6-4 to a 4-8-2?  (or even a 4-8-0).  This way you could take advantage of
all that weight in the cab (as it looks like its full of bricks and equipment)
to increase the tractive effort.

--Tony



Message has 1 Reply:
  Re: "Big Blue" Pneumatic 4-6-4 engine and tender
 
In lugnet.org.ca.rtltoronto, Anthony Sava wrote: <snip> (...) Never worry about replying--that's what usergroups are for :) (...) Oh if I only had more BBB wheels--the ones you see ar ethe only ones I have :) This way you could take advantage of (...) (18 years ago, 1-Nov-06, to lugnet.org.ca.rtltoronto, lugnet.trains)

Message is in Reply To:
  Re: "Big Blue" Pneumatic 4-6-4 engine and tender
 
In lugnet.org.ca.rtltoronto, Anthony Sava wrote: <snip> (...) Great ideas Anthony! I did put a LEGO boat weight right on top of the drivers, and the 9v motor is pretty close as well. I haven't looked at it in a few days, but plan on modifying it (...) (18 years ago, 1-Nov-06, to lugnet.org.ca.rtltoronto, lugnet.trains)

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