Its probably no coincidence that the only 2 tracked vehicles in NATO designed to be multifuel, turned out to be mechanical disasters.
Uhm no. The Leopard 1 engine is multifuel and runs fine. Which is the one example that imediately come to my mind. For lower costs and more power it has shifted towards pure Diesel fuel engines today. Which brings its own problems when the Diesel fuel optimized COTS engines choke on JP4 kerosene supplied by US forces.
I thought they had converted that to be a pure diesel at an early stage?
They can run Challenger 2 on JP4, and did in 2003 from what they siphoned off from a USMC pipeline. Had lowered power output though.
Right the Perkins V12 is also multifuel. When burning kerosene you have lower energy density in the fuel and thus less power output in the end.
My M813a1 was set up for JP8 and ran fine (save for the plastic garbage I found in the tank).
Whats the heating value diff between kerosene and diesel, shouldn't be much at all. You dont really need a multi-fuel for that switch. Its MoGas thats the hard part. Thats what needs the MAN hypercycle combustion stuff.
Yes, the diesel engine will combust Kerosene (or olive oil or old frying oil or...) What kills many modern engines are the fuel injection pumps, that are built with the expectation of the lubricity of diesel fuel and they break when other fuels run through them. also modern turbo engiens are highly optimised in how the injection is controlled etc. whcih is all FUBAR, when not using the proper fuel. The margins have been made much narrower in search for more power.
Adding, looking at some charts, Jp8 and no1 diesel come from the same distillate fractions from raw feed stock. No 2 diesel is a thicker fraction, lower down the distillation column. Gasoline is a higher, more aromatic fraction, next bracket up from kerosene and no1 diesel.
Because diesel fuel has the highest density of the three, you of course have more mass to burn. Which means higher energy density. IIIRC the Abrams manual states a number on the power loss with various fuels.