Chris's Holly Pumping Engine Build

[steam guy willy]

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

[crueby]

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.

[steam guy willy]

Hi Chris ,  Yes  of course .. makes for a more compact engine ?!!  I was looking in the previous posts  !!
Thanks

Willy

[Charles Lamont]

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.

[flopearedmule]

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!!

[crueby]

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!!

Thanks!!