Editing Napier Nomad (section)

===Nomad I===
[[File:NomadSchematic 185kBpng360kB.png|thumb|right|Schematic drawing of Napier Nomad I and II.]]
The initial Nomad design (E.125) or Nomad 1 was incredibly complex, almost two engines in one. One was a [[Twincharger|turbo-supercharged]] two-stroke diesel, having some resemblance to half of a [[Napier Sabre|Napier Sabre's]] [[H engine|H-24]]. Mounted below this were the rotating parts of a [[turboprop]] engine, based on the [[Napier Naiad|Naiad]] design, the output of which drove the front propeller of a contra-rotating pair. To achieve higher boost, the crankshaft drove a centrifugal supercharger, which also provided the scavenging needed for starting the engine from rest. During take-off additional fuel was injected into the rear [[turbine]] stage for more power, and turned off once the aircraft was cruising.{{sfnp|Lumsden|2003|page=170}}

The compressor and turbine assemblies of the Nomad were tested during 1948, and the complete unit was run in October 1949. The prototype was installed in the nose of an [[Avro Lincoln]] [[heavy bomber]] for testing: it first flew in 1950 and appeared at the [[Farnborough Air Display]] on 10 September 1951.{{sfnp|Lumsden|2003|page=172}} In total the Nomad I ran for just over 1,000 hours, and proved to be rather temperamental, but when running properly it could produce {{cvt|3000|hp|MW}} and {{convert|320|lbf|kN|abbr=on}} thrust. It had a [[specific fuel consumption (shaft engine)|specific fuel consumption]] (sfc) of {{convert|0.36|lb/hph|g/kWh|abbr=on}}.

The prototype Nomad I is on display at the [[National Museum of Flight]] at [[East Fortune|East Fortune Airfield]] in [[Scotland]].