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The Mack Super Pumper was a locomotive engined fire fighter (2018)

(bangshift.com)
148 points mstngl | 1 comments | 03 Nov 25 20:37 UTC | HN request time: 0s | source
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giobox ◴[03 Nov 25 21:23 UTC] No.45804622[source]▶
That "deltic" engine just for the water pumping is incredible, I'd never seen that cylinder layout before.

> https://en.wikipedia.org/wiki/Napier_Deltic

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hydrogen7800 ◴[03 Nov 25 22:14 UTC] No.45805088[source]▶
Piston engines got pretty wild before turbines eventually took over the world. The most efficient ones were more efficient than today's turbines in terms of BSFC[0]. One of the most interesting to me was the Napier Nomad[1], which used turbo- and super-charging. However, the turbo had secondary fuel injection and effectively ran as a turbine to drive the compressor.

[0]https://en.wikipedia.org/wiki/Brake-specific_fuel_consumptio... [1]https://en.wikipedia.org/wiki/Napier_Nomad

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1. jabl ◴[03 Nov 25 22:56 UTC] No.45805476[source]▶
Napier Nomad is one of my favorite engine designs. More info at https://oldmachinepress.com/2019/08/05/napier-nomad-compound...