J.A.W. wrote: ↑
Mon Jan 13, 2020 9:00 am
Somehow gg, I'd think going 'diesel' is def' a step too far for F1, so the same 'multi-fuel' function
aspect designed in, as a NATO military requirement (& which goes back to the Leyland L60 tank-mill
of ~55 years ago), as well as being a feature of the hi-tech/efficiency Napier Nomad turbo-compound
aero-engine 2T (cancelled ~65 y/o) which allows for an advanced 'petrol/liquid fuel' response, is more
likely of interest, esp' given the ability of 2T to provide an 'exciting sounding' exhaust, even at fairly
placid RPM levels, due to its firing urgency/pulse-blowdown fundamentals...
Mr F1 Pat Symonds sees 'synthetic fuel made using surplus green energy' - (I wonder where is this surplus green energy ?)
re the post quoted above ........
and http://archive.commercialmotor.com/arti ... on-engines
and http://archive.commercialmotor.com/arti ... at-chobham
Commer TS3 and even 5 litre BMC and 2.5 litre Land Rover engine multi-fuelled !
though from these links we wouldn't know how multi-fuel running was achieved (anyway just a gimmick in the L60) ....
MF seems to mean running a 'diesel' engine using another liquid fuel - probably needing raised CR, maybe lower boost
no change ??? to the Nomad III using JP-4 'wide-cut' jet fuel (regardable as kerosene/heavier gasoline fractions blend)
NB not dual-fuel - this means a diesel run on pilot diesel injection (the minor fuel) 'carefully' igniting gas (the main fuel)
the Nomad of course used all or almost all the turbine energy to compress the large amounts of air
(its exhaust energy state could be raised by adding further fuel (to the exhaust) but of course the efficiency then plummeted)
the Nomad was about using diesel or jet fuel costing 62% of Avgas 100/130 and c. 50% of Avgas 115/145 costs
posterity seems required to count the Nomad's (low) exhaust thrust as contributing to equivalent horsepower ehp
but ignore the Wright Turbo-Compound's exhaust thrust (ehp didn't exist when Wright sold their first 10000 TCs)
a former co-worker witnessed the shooting-down of a Ju 86P that unwisely tried to land at Manston
its high-boosted high altitude engines transmitted little power from crankshaft to crankshaft via the gears ...
because the supercharger took so much power from the crankshaft driving it