H-6, H-8 and R4-RL Brake Valves on Engines

[NW Mailing List]

Just to add to the discussion -
 
A publication on the "Locomotive and the Air Brake" dated 1900 had the following description of the Engineer's D-8 Brake Valve:
 
"The engineer's brake valve is that part of the air brake equipment by means of which the engineer can control the action of the brakes.  The two kinds of brake valves now in use are the D-8 and the D-5, E-6 or F-6, the latter three terms denoting one and the same valve, the letter and number being changed as each new catalogue is issued.  The D-8 is gradually being supplanted by the F-6, but there are still a large number of the former in use."
 
I recall working on at least one of the Wabash 6BL units with the pressure maintaining feature - they would end up in Bellevue occasionally.
 
W.E. Honeycutt

> On 08/01/2024 7:36 PM EDT NW Mailing List <nw-mailing-list at nwhs.org> wrote:
>  
>  
> Thanks for straightening me ot, Bill.
> As a sidelight, one of the Wabash air gurus pt a pressure maintaining device on a 6BL brake but evidently not successful to warrant roster-wide application.l
> Having no hostlers to straighten ou consists, you wound up with some unhappy situations.  I came out of Moberly one bitter cold evening with a big train and a four unit consist of two of two ov the EMD SD40 demonstrators, a U25b and an ex NKP GP7 with a #6 brake/  I'll let you guess which one was in the lead.
>  - Ed King   
>  
> 
> On Thu, Aug 1, 2024 at 4:44 PM NW Mailing List via NW-Mailing-List <nw-mailing-list at nwhs.org mailto:nw-mailing-list at nwhs.org> wrote:
> 
> > I defer to Mr. King on the answer to the first question.
> > 
> > In connection with the second question, The RS-3's, RS-11's (Road Numbers 309 through 364) and GP-9's (Road Numbers 500 through 505 and 710 through 842) were built with 24RL.  The GP-7's inherited from the Nickel Plate and Wabash had No. 6 equipment.
> > 
> > There were some Nickel Plate and Wabash switchers that had 14-EL equipment.
> > 
> > W.E. Honeycutt
> > 
> > 
> > > On 07/29/2024 5:43 PM EDT NW Mailing List via NW-Mailing-List <nw-mailing-list at nwhs.org mailto:nw-mailing-list at nwhs.org> wrote:
> > >
> > > 
> > > Mr. King is probably the only man on this List who can answer these two questions...
> > >
> > > 1. Did not the N&W add the Pressure Maintaining feature to its schedule H-8 brake equipment on passenger engines, when pressure Maintaining came out ? Or did they just immediately convert some steam engines to the 24 brake, in order to get Pressure Maintaining?
> > >
> > > 2. Were any of the first few N&W Diesels delivered with the old H-8 brake valves? I have seen lots of H-8 valves on the Diesel engines of other roads, but cannot recall clearly about the early N&W RS-3s and GP-7s.
> > >
> > > Thanks.
> > >
> > > -- abram burnett
> > > Turnips Reimagined !
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