New answers tagged engine
2
Jendrassik's own patent from 1939 does not go in-depth into the alloys. However, for the turbine blade legs he mentions "austenitic [stainless] steel" as preferable (see PDF page 3).
From that era, a Swiss patent from 1937 on the materials of gas turbine parts also discusses austenitic steel, in particular (translated from German):
Alloy of an austenitic ...
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What is the time frame ? Vitalium ( cobalt + chromium + Mo ) was one of the first turbine blade materials. Otherwise 50 % iron is not unusual ; for example the Incoloy group. But most of the high temperature materials have nickel as the major element . And contain Cr, Mo, Co , W , etc , and 1 to 20% iron. A temperature of 550 C / 1022 F is certainly not ...
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I went and broke down how much fuel is burned to create one hp in the lycoming 720 vs the pt6 and the piston engine came out to be between 7-8 percent more efficient than the turboprop.
Pt6 approximately 088-.089 gallons per HP per hour
Lycoming 720 approximately. 081-.082 gallons per HP per hour
7
First and foremost, you follow the directions of the flight crew and any emergency services you encounter. This takes precedent over anything anyone else tells you. Failing to do so may put your life and the lives of those around you in danger.
That said, lets break this down into the possible sources of danger...
Brakes and Wheels
If you're evacuating ...
answered Jan 7 at 10:28
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2
One rule of thumb that firefighters are taught is that the 'safe' distance for the public to be from a fire is when it appears about the same size as your hand at arm's length.
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Now regarding the incompressible and frictionless gas: if it is incompressible then there will be no pressure difference generating lift. If it is frictionless, then there will be no way to interact with the gas. Both conditions are too limiting to work together. Out of the two I would prefer to keep the viscosity because incompressible is like water where ...
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Engine mounts and thrust links
How are engines mounted onto wings?
Modern engines are hanged to the pylon struts fixed to the wings, at two mounts, using an attachment device named hanger fitting in the terminology of CFMI. This is how a CFM56-7B is mounted onto the wing of a Boeing 737 NG:
CFM56-7B on the wing of a Boeing 737 NG. Adapted from CFM56-...
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The Aircraft Flight Manual or Flight Crew Operating Manual will specify the timeframe during which engine oil may be checked after engine shutdown. For the CF34-3B engine on a Challenger 605, checking must be done between 15 minutes and 2 hours following shutdown.
If done outside of this window, the engine must be dry-motored (cranked without introducing ...
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