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 Posted - July 31 2014 : 8:01:06 PM
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I'm building a rather odd project soon. I was wondering if anyone could help me with those NWSL gear boxes meant for steamer repowers. I need 2 and one will be facing the other way like a pair of diesel trucks. Also, need some high gear, be able to at least 70 MPH. Not too high or low. I can't understand the numbers!
" Heck with counting 'em rivets, TRAINS ARE FOR FUN! Not called the Mad Scientist for nothing either!"
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Posted - July 31 2014 : 8:13:37 PM
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I take it you are looking at the NWSL website?
Which gearboxes are you looking at?
What type of motor?
Wheel diameter?
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Posted - July 31 2014 : 8:23:18 PM
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A high torqing diesel style motor from a-line or something. Did see a 28:1 and the wheels will be rather wide and tall. Maybe a 1" wide or so and 1 1/2" tall I'm guessing. Looked at the online store of their's and like the non-idler style. Building a very unique slot car monster truck in 1:25 scale! I want one that has a very unique suspension set up so it take a good landing!
" Heck with counting 'em rivets, TRAINS ARE FOR FUN! Not called the Mad Scientist for nothing either!"
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Posted - July 31 2014 : 11:18:31 PM
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An actual 70 mph?
Or 1/24 scale 70 mph.
If it's 70 actual mph, you are going to need a very high rpm motor.
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Posted - August 01 2014 : 11:09:14 AM
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Scaled 70.
" Heck with counting 'em rivets, TRAINS ARE FOR FUN! Not called the Mad Scientist for nothing either!"
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Posted - August 01 2014 : 12:38:53 PM
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Just starting with the basics so that we are on the same page.
70mph in 1/25 scale is 4.1 feet per second (2.79 actual mph.)
1.5 inch tall tires will need to spin 630 rpm.
Typical HO train motor is 10,000 rpm. max?? (10,000/630)
or a 15.8 reduction gear box.
I think NWSL has 18:1 gear boxes.
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