Description:
The science of aeronautics & related technology. (Moderated)
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sci.aeronautics scheduled for sporge flood
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Sporge flooding of sci.aeronautics will commence in a few hours. This will render sci.aeronautics useless. For an example, see Sci.Crypt. Supernews filters out this sporgery spam. Get a better Usenet experience. Sign up for our risk-free trial today! [link]
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Supersonic diffuser
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...There is some discussion about supersonic wind tunnels in Liepmann and Roshko. Also look at "High-speed wind tunnel testing" by Pope and Goin. Olin Perry Norton
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Combining gearbox
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...Considering the 'sync' portion of the question: The problem here is to provide for load sharing without a tendency of the two engines to 'hunt.' In the service environment, it isn't practical to expect turbine engines to maintain a constant output throughout their service life and 'synchronization' becomes an expensive... more »
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What is the difference between total and stagnation pressure?
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...Static pressure is the pressure that an object feels. The total pressure is the pressure if the fluid loses all its velocity; it also a measure of the total energy for fluids moving at velocities below speeds where compressibility occurs : total pressure=static pressure + dynamic pressure ((density*velocity**2)/2)... more »
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American Society of Aeronautic Engineers
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I am researching professional societies in aeronautics. I am aware of the start of the IAS in 1930-32, I was also aware that the SAE has an aerospace division. In reading the history of the later, it turns out there was an American Society of Aeronautic Engineers that was merged in the SAE in 1916. I can find very little about this ASAE, however.... more »
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About Spoilers on cars
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...Maybe, maybe not. The devil is in the details. If the purpose of the spoiler is to create downforce (a lift force) then there is induced drag created. Some cars inherantly have a lift force at speed because of the body shape and interaction with the road surface. A spoiler that merely reduces this lift could be drag free (or even reduce drag). However,... more »
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UAV's
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...The laws of aerodynamics do not change depending on whether there is a pilot on board. Any good aero text will do. However, if you are talking about a SMALL uav, which will operate at lower Reynolds number than full size aircraft, the books on Model Aerodynamics by Martin Simmons are very good!... more »
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