jet engine - How does a propfan work? - Aviation Stack Exchange
Nov 5, 2019 · To keep it simple (source for all that follows is Wikipedia - Propfan): You can think of the contemporary propfan as a turboprop that has two high rpm contra-rotating propellers or …
Is the Progress D-27 really a propfan? - Aviation Stack Exchange
Aug 12, 2014 · A propfan consists of swept, rotatable airfoil blades pivotally mounted to a hub for pitch change movement with respect thereto, and having a solidity ratio of 1.0 or greater at the …
propfan - What integration of aircraft propulsion would be more ...
Feb 13, 2020 · Roughly speaking a propfan would combine some of the best aspects of turbofan and turboprop in a way that would be beneficial for your project. However, during my (so far …
Why are most turbofans tractors, but most propfans pushers?
The An-70 is the only production propfan aircraft, making the Progress D-27 the only mass-produced operational propfan. So its configuration is the norm. As for the reasons for …
efficiency - What is the function of the aft stator in CFM's open …
Jun 29, 2021 · Another thing is the scalability. A contra-rotating propfan like that on the McDonnell Douglas MD-94X demonstrator produced ~100 kN of thrust, which is what you'd expect on a …
Why are high-bypass turbofans faster than turboprops?
Nov 21, 2020 · 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 …
Are UDF/Propfan Engines Thrust Producing or Power Producing?
Nov 18, 2023 · Here is a chart showing full throttle thrust lapse (vs. Mach) for a GE-36 propfan at 35,000 ft. I've multiplied thrust lapse by Mach to give something related to power. From this, it …
Newest 'propfan' Questions - Aviation Stack Exchange
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.
propfan - Using a spring balance to find static EDF Thrust
Sep 3, 2021 · 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 …
What is the difference between a turbofan and a turboprop engine ...
May 19, 2014 · Work has been done on creating a "propfan" engine, in an attempt to get the efficiency of a turboprop and the speed of a turbofan. They have yet to come up with a viable …