Timeline for Why are push-propellers so rare, yet they are still around?
Current License: CC BY-SA 3.0
12 events
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| Jul 19, 2017 at 1:30 | comment | added | Jenia Be Nice Please | what is the 5587? Is it drag of the engine or something? | |
| Nov 3, 2016 at 7:40 | comment | added | slebetman | @falstro: That diagram does not show the loading factor on the shaft. It shows the thrust and drag contributions of different parts of the engine. The compressor stages generate most of the thrust compared to the hot gas expansion at the tail. So a jet engine is more of a propeller engine where the prop is ducted rather than an air-breathing turbocharged rocket engine. | |
| Feb 16, 2016 at 0:05 | comment | added | ptgflyer | Also, pushers allow higher tail angles without having to worry about airflow seperation, and they decrease scrubbing drag and increase laminar flow because there is no propwash on the aircraft. | |
| Apr 11, 2014 at 11:13 | comment | added | DeltaLima♦ | @PeterKämpf looking at the Avanti is ok, but have you ever listened to it? I really like it but it's not exactly silent. It is the example of a loud pusher prop design. | |
| Apr 11, 2014 at 6:39 | comment | added | falstro | @DeltaLima I'm not convinced the turbofan or jet engines are either push or pull just because of loading on the shaft; helicopters often have turbine engines, yet it's the fact that the rotor is on top pulling it up that makes it a puller configuration, isn't it? Having the rotor on the bottom, would make it a pusher, which of course would be insane. Not impossible though, space shuttles would be an example of a vertical take-off craft in pusher configuration. | |
| Apr 10, 2014 at 20:34 | comment | added | Peter Kämpf | The interference with the wing wake is a serious issue, but only when the prop axis is in the plane of the wing. Once it is lifted above or lowered below, the prop blade will slice through it gradually than hitting it over the whole span, making noise and dynamic loading tolerable. Please take look at the Piaggio Avanti: This is an excellent design. | |
| Apr 10, 2014 at 16:14 | history | edited | voretaq7 | CC BY-SA 3.0 |
formatting
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| Apr 10, 2014 at 11:04 | history | edited | DeltaLima♦ | CC BY-SA 3.0 |
Added Jet engine pull explanation
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| Apr 10, 2014 at 8:36 | comment | added | DeltaLima♦ | @falstro Just above that list is a list of advantages. That are the reasons people built pushers. And once they are built, they are around for a while. Although you don't see them often. | |
| Apr 10, 2014 at 8:21 | comment | added | Thunderstrike | @falstro you can have an unobstructed view out front, they also are quieter since the engine is at the back. they may be safer as well, since they are difficult to stall if they have a canard configuration: youtube.com/watch?v=H50zFi11OMU (just to name a few) | |
| Apr 10, 2014 at 7:55 | comment | added | falstro | I noticed this list as well. So why are there pushers at all? | |
| Apr 10, 2014 at 7:48 | history | answered | DeltaLima♦ | CC BY-SA 3.0 |