Questions tagged [propfan]
The propfan tag has no usage guidance.
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Using a spring balance to find static EDF Thrust
I have been attempting to measure the static thrust of my EDF with a spring balance. It is part of a group university project. The EDF specs are as follows: 90mm freewing 9 blade 1900 Kv thats rated ...
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Electric ducted fan with thrust tube thrust and exit velocity calculation
I am working on an electric ducted fan rocket that has thrust vector control, see image 1. The 90mm EDF is located a bit higher above this blue section, near 1., so I believe the blue section becomes ...
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What is the function of the aft stator in CFM's open rotor engine design?
CFM revealed their design for a open rotor propfan engine with two stages of blades - one active set of blades rotating in the forward and an static sets of blades on the aft.
According to The ...
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Why are high-bypass turbofans faster than turboprops?
The turboprop, and especially the high-blade-count propfan, differs from the high-bypass turbofan principally in throwing away the draggy outer ducting. This makes it easier to obtain a greater ...
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What integration of aircraft propulsion would be more efficient at sea level high speed flight? A turbofan, unducted fan or a turbojet?
For educational purposes I am designing a small single seat twin engine aircraft that will be as efficient as possible at sea level and at a variety of speeds 150-500+ mph. The goal is to be able to ...
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How does a propfan work?
Could someone give me a simple working of a propfan? Also I've heard the 2 sets of blades in a propfan rotate in opposite directions. Is this true? And if so why?
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How does propellers' pitch change during the use of reverse thrust in turboprop/propfan propelled planes?
Which way do proplellers turn during the use of reverse thrust in turboprop/propfan propelled planes:
A) Do the leading and trailing edges of propellers remain the same or...
B) Do the propellers ...
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How to calculate power required to drive an isolated fan of a TurboFan engine?
If I isolate the fan from a TurboFan jet engine (specifically GE90) and power it electrically with a motor,
how much power is required for the electrical source to drive the fan to give the same ...
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Why are most turbofans tractors, but most propfans pushers?
Turbofans and propfans are, in concept, quite similar: both have a turbojet core, plus one or more additional turbine stages that drive a fan(s) which blows air around the core (this is known as ...
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