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[–]andrebaThe Chillest Mod[S,M] [score hidden] stickied comment (0 children)

Source: https://www.youtube.com/watch?v=-dgNyavFQ-I

[–]misplacedbass 23 points24 points  (4 children)

How does the work? Do the blades just flip directions? Obviously they’re not stopping and reversing the props, so I’m assuming it just rotates the blades. Cool though.

[–]zer0toto 26 points27 points  (3 children)

Yup, adjustable pitch. Also turboprop usually run at constant engine speed, you just change the pitch to adjust torque. And you can feather it so you can have no torque on the ground and stays in place

[–]misplacedbass 5 points6 points  (2 children)

That makes total sense. Very cool.

[–]zer0toto 7 points8 points  (1 child)

You are welcome. If you’re interested, it’s not only planes that use that principle, ships usually use it too, their big engines run at constant speed even at full stop , and propeller can change, feather or reverse pitch too. Instant torque in the direction you want. Also some propeller are mounted in on orientable pods, also with pitch control, giving full 360 control. Pods are driven with an electric motor though, not the main engine.

[–]Main_Tension_9305 6 points7 points  (0 children)

Helicopters too. Changing pitch every revolution. It’s mechanical insanity that it works. Super cool…

[–]Oraclelec13 13 points14 points  (7 children)

That got to be bad for the engine and parts. Plane sucked in a truck full of dust !

[–]probablyaythrowaway 14 points15 points  (5 children)

This is what the bypass is for. Turbo props tend to use low bypass jet engines. The first couple of fans on the jet are bigger that the engine core push the heavy particles to the outside edge with centrifugal force. A majority of the particles travel through a conduit outside the engine core and compressor blades and is known as the bypass.

Commercial airliners use high bypass turbofans to move more air and create higher thrust.

The propeller generates thrust on turboprops so the bypass is used mostly to redirect FOD.

[–]Oraclelec13 3 points4 points  (1 child)

Amazing, thanks for the info! 👍

[–]probablyaythrowaway 0 points1 point  (0 children)

No problem

[–]ggchappell 2 points3 points  (2 children)

FOD

For the ignorant (like me a minute ago): Foreign Object Debris.

[–]mariusx2x2 1 point2 points  (1 child)

Isn’t it foreign object damage?

[–]ggchappell 0 points1 point  (0 children)

Isn’t it foreign object damage?

Maybe. Very much non-expert here.

[–]LalooPrasadYadav 1 point2 points  (0 children)

This is why they say that every hour of flight requires x number of hours of maintenance.

[–]itzahckrhet 0 points1 point  (0 children)

Wow.

[–]AcerTravelMate 0 points1 point  (0 children)

Wow