Author Topic: Chris's Holly Pumping Engine Build  (Read 101129 times)

Offline steam guy willy

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Re: Chris's Holly Pumping Engine Build
« Reply #2100 on: January 24, 2022, 07:05:15 PM »
Hi Chris , that is an interesting concept and has set my brain ticking over  !! So ..no need for heavy slide bars  I haven't seen this before !!

Willy

Online crueby

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Re: Chris's Holly Pumping Engine Build
« Reply #2101 on: January 24, 2022, 07:58:51 PM »
Hi Chris , that is an interesting concept and has set my brain ticking over  !! So ..no need for heavy slide bars  I haven't seen this before !!

Willy
Willy, the crossheads themselves still ride in guide bars in the engine frame, the pump plungers are piggybacking on the same guides.



Offline steam guy willy

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Re: Chris's Holly Pumping Engine Build
« Reply #2102 on: January 25, 2022, 02:58:27 AM »
Hi Chris ,  Yes  of course .. makes for a more compact engine ?!!  I was looking in the previous posts  !!
Thanks

Willy

Offline Charles Lamont

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Re: Chris's Holly Pumping Engine Build
« Reply #2103 on: January 25, 2022, 09:17:02 AM »
IIRC it was done at a smaller scale. Fire engine pumps, for example, used a scotch yoke between the piston and pump rods, and no guidebars. On these engines the crankshaft is there only for smooth running, valve drive and synchrony; no power output.

Offline flopearedmule

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Re: Chris's Holly Pumping Engine Build
« Reply #2104 on: April 26, 2022, 11:11:34 PM »
Hey Chris
Sorry I'm late to the party.
I just spent some time and got caught up.  This model is great!  Very nice work.
Congratulations!! :pinkelephant:

Online crueby

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Re: Chris's Holly Pumping Engine Build
« Reply #2105 on: April 26, 2022, 11:22:47 PM »
Hey Chris
Sorry I'm late to the party.
I just spent some time and got caught up.  This model is great!  Very nice work.
Congratulations!! :pinkelephant:
Thanks!!   :cheers: