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3

The Heinkel Hes 3b, which powered the Heinkel He 178, had a radial turbine. This was the first operational jet engine to power an airplane.


1

I'm interested in turboprops, turbojets, turbofans, even very tiny ones for RC aircraft. I don't know about any practical designs for aircraft that use a centrifugal turbine. That seems unlikely to me, given the history of development of turbine aircraft engines as compared to other turbine designs (especially the automotive turbocharger, which predates ...


7

Aluminum is corroded by salt when wet. Anodization and paint or coatings provide some corrosion resistance, but removing any salt is a big help. Also some components in sea water such as sodium sulfate can cause "hot corrosion" (a specialized high temperature relatively fast corrosion) in many turbine high alloys.


63

The helicopter shown is an Anti-Submarine Warfare Helicopter. ASW helicopters generally have the ability to detect submarines either Passively or Actively. Passively, sonar-buoys are dropped into the sea and act as ‘microphones’. The returns from these can be triangulated to track submarines. To achieve this, the helicopters altitude will generally be 1500ft ...


4

Looking up the Jendrassik CS1, Google belatedly brought me to this question; though my Hungarian is non-existent, I suspect the '50% reaction' refers to the turbine's design parameters; a 50% degree of reaction means the pressure drop across a turbine stage is shared equally between stator and rotor (i.e. between fixed and moving blades). As to materials, ...


6

Turbo or not, you lean mostly because the mixture required for takeoff is far richer than necessary for lower power settings, even at sea level. Aircraft engines are partly air cooled and partly liquid cooled - the full-time liquid cooling is oil, and on takeoff, there is part time liquid cooling in the form of excess gasoline from the full rich mixture. ...


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