Coventry K4 3/4” Identification

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WJH
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Coventry K4 3/4” Identification

Post by WJH » Tue Feb 06, 2018 6:55 am

I have the frames, drivers, axles, and four of the six axle boxes to what I believe is a Coventry K4. I bought these parts a decade ago. The frames have a taper on one edge of the axle box cutouts for an adjustable wedge. I think replicating this feature in live steam is rather rare. The drivers have 17 spokes, the middle drivers are blind. The axle bearing surfaces are machined to .6875 and are within a few tenths of each other.

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steamingdon
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Re: Coventry K4 3/4” Identification

Post by steamingdon » Tue Feb 06, 2018 8:15 am

Keith Taylor will know for sure what this is part of. Why a blind driver? this should be interesting. :? Tapered axel boxes?
steamer

WJH
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Re: Coventry K4 3/4” Identification

Post by WJH » Tue Feb 06, 2018 9:45 am

John says the frames do not follow Coventry’s lines, not sure about the drivers either. Were 17 spokes common only to Pennsy designs?


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Trainman4602
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Re: Coventry K4 3/4” Identification

Post by Trainman4602 » Tue Feb 06, 2018 10:26 pm

The prototype K4 was originally built with a center (main) driver blind. That was unusual for a 3 drivered main line locomotive. Early on it was tired and they remained tired until they were scrapped.
ALLWAYS OPERATING MY TRAIN IN A SAFE MANNER USING AUTOMATIC AIR BRAKES

Jerry_H
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Re: Coventry K4 3/4” Identification

Post by Jerry_H » Thu Feb 08, 2018 12:59 am

17 spokes is not just a Pennsy thing. The Southern Ps4 pacific had 17 spoke drivers as did others.

Jerry
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WJH
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Re: Coventry K4 3/4” Identification

Post by WJH » Thu Feb 08, 2018 5:16 am

Hmm, guess I will sell the wheel castings and frame.
I just purchased a new 12x36 lathe decked out with a DRO, coolant system, micrometer carriage stop, etc.
Time to make room in the shop and sell some stuff...
John, I still want to support what you are doing, I promise to buy some castings from you.

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