csteimel47591
Airman
- 10
- Oct 17, 2011
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??? Which one ???Some of the Japanese Baka aircraft employed a ducted engine/fan combination.
Post war Napier did just that and produced tha Nomad; a whopping two stroke 12 cylinder sleeve valve beastie, the compound diesel/gas turbine, which was designed to use a wide range of different fuels. The compressor section was 12 stage and was mechanically coupled to the piston engine. It put out 3,037 shp. It was intended to be fitted to Shackletons, but the idea was killed off by the turbo prop.A compressor powered by a piston engine
Post war Napier did just that and produced tha Nomad; a whopping two stroke 12 cylinder sleeve valve beastie, the compound diesel/gas turbine, which was designed to use a wide range of different fuels. The compressor section was 12 stage and was mechanically coupled to the piston engine. It put out 3,037 shp. It was intended to be fitted to Shackletons, but the idea was killed off by the turbo prop.
use a piston engine to compress air for a combustor and exhaust nozzle to create thrust.
Yep, the Baka was powered by a rocket engine; one variant was powered by a gas turbine.Which one ???
Okay, I know, but the compressor was mechanically coupled to the piston engine, but I see your point. I mentioned the Napier because a place I used to work at had one and it always impressed me; it's such a big and complex beastie - the guys working on it only got it fitted out, but not to a working state and it would have been so impressive seeing that thing roaring away on a test stand.
I guess the concept of a reciprocating engine driving a compressor didn't get to be put into practice because prior to the war there were a few people working on pure gas turbine engines, which offered a significant advantage over such a thing. Why go to all that effort when a centrifugal flow gas turbine has fewer moving parts than a V-12 piston engine and can produce enough thrust to push along an aircraft of similar size to your average fighter at a higher speed? Also, the first axial flow gas turbine was bench tested before the war, so development of jet engines would be more advantageous if you are going to go to the effort to research compressor design.
Say, using an R-2800 to power a compressor. Dumping 2000HP into a compressor should be suffice to produce enough thrust to power an aircraft like the ME-262.