180 Autorotation in MD520N (Carey)

Carey's First 180 Autorotation in MD520 NOTAR!

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Entertainment

Tags:

• 180
• Autorotation
• in
• MD520N
• (Carey)

[3pack1991]

can you explain to me what is that "Autorotation".

[BPA6013]

The best I can explain it in layman's terms is an emergency procedure when the engine has malfunctioned and can no longer power the main rotor, the pilot reduces the collective pitch in the main rotor blades (flattens them out) and uses the air coming up through the rotor blades to drive them and maintain a safe rotor rpm. When approaching the ground, the pilot trades forward air speed by flaring (sitting it on the tail) and increasing rotor rpm to pull pitch and cushion the landing.

[falconx4444]

It's easy to do an auto in a 520. Try doing that in a Robinson R22 with a 17 knot crosswind.

[BPA6013]

Well I have....but....nevermind!  I'm glad we both get to fly helicopters! Good Luck to you!

[incubrian]

@BPA6013

hahaha awesome answer :) pwned

great vid btw man, thanks for uploading

[dfeers]

It was well executed for a practice auto. But you cant always land with a ground run. If you can you should try to minimmize that in case you have to land on soft or rough terrain. Just that amount of ground run into soft or wet soil or rocks will nose it over.

[brssmnky88]

very well executed!

[likeawhispr]

Google NOTAR and you'll find various explanations on how the aircraft operates w/out a tail rotor :)

[likeawhispr]

They do not have to replace the skids, and a lot of helicopters have special metal plates on the bottom of the skids to minimize wear from autorotations and practicing run-on landings (landing like an airplane on the skids). Usually such protective plates are found on training aircraft.

[nickekholm]

HOW DOES THIS WORK WITH NO TAIL ROTOR?

[oldfart387]

Did they have to replace the rails? (I mean the 'landing' rails. don't know what to call them)

[dodger202020]

@JaleelJohanson62 aerodynamic forces in certain regions of the rotor blades cause them to rotate in unpowered flight. This total aerodynamic force (TAF) keeps the blades spinning and also provide lift so you don't fall like a rock. Contrary to popular opinion the blade pitch is not flat and it's certainly NOT negative. Google "autorotation aerodynamics" and check out the first link. They explain it much better there than I can in a few hundred characters.

[dodger202020]

@1Masterofwar Maybe you need some study material. Feel free to google "autorotation aerodynamics" and read the first link.

[dodger202020]

@1Masterofwar Unlike you I *DO* know what I am talking about. There is NOT a negative pitch on the blades. If you really are a helicopter pilot (which I highly doubt, and I *AM* one) then you really need to relearn the aerodynamics of an autorotation. It is a combination of the induced airflow (now an upflow) combining with the relative wind to create a total aerodynamic force (TAF) that is upwards and slight forward of the axis of rotation. This takes place in the driving region.