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MrSkidkicker
Registrace 30. 07. 2009
Tail Rotor Aerodynamics: Can live with them......Can't live without them.
The tail rotor requires a flapping hinge to compensate for dissymmetry of lift. By turning it 45 degrees, the flapping hinge name changes to the delta hinge. Watch the video to see how the delta hinge will benefit the tail rotor function.
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Video
The Constant Speed Propeller
zhlédnutí 49KPřed 3 lety
Moving the constant speed propeller from Feather to Reverse.
The Freewheeling Unit. Why do helicopters need one?
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Description and disassembly of the Freewheeling unit found in helicopters.
Bell 205 landing in Sudbury, Ontario. MNR. YSB
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Pilot: Norm Kerr Engineer: MrSkidkicker Well deserved return to the nickel capitol after a long fire tour.
Turbine Wheel. Spinning with Compressed Air at Different Angles. High RPM. Great Sound
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Today we spin up a turbine wheel using compressed air.
Turbine Engine Combustor Design
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Operation and inspection of turbine engine combustors. A combustor is a component or area of a gas turbine, ramjet, or scramjet engine where combustion takes place. It is also known as a burner, combustion chamber or flame holder. In a gas turbine engine, the combustor or combustion chamber is fed high pressure air by the compression system.
Main Rotor Droop Stops and Flap Restraints
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In order to restrict movement of the flapping hinge, droop stops and flap restraints may be incorporated into the rotor design. Watch to find out how they function automatically.
Centrifugal Compressors for Turbine Engines. 1 or 2 in series but never 3.
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The compressor in most turboshaft and turbo prop engines will include a centrifugal compressor pressurizing the air to over 120 psi.
Bernoulli's Principle and Coanda Effect. In my bathroom!
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Watch, as the mysteries of airflow come to life while watching paint dry.
Wahoo Kickr Version 5: Initial impressions, spacing for derailleur rigging and tension delay.
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Are you having trouble having to adjust your Wahoo Kickr every time you switch from street to trainer mode? I may have the solution for you
Twin Engine Rotary and Fixed Wing Indication: Do we need it?
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Engine indication in detail with the BO 105 and King air.
Brayton Cycle
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Print the handout from iLearn and fill it in while you watch the video.
Rigid Rotor Head
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This rotor head is from the BO 105. It has only one axis of movement. The other two functions of a rotor system are performed at the blade and not at the rotor head.
Fully Articulated and Semi-Rigid Rotor Systems
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Fully Articulated and Semi-Rigid Rotor Systems
Movement of the pilot valve, beta valve and beta sense ring
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Movement of the pilot valve, beta valve and beta sense ring
Rotary Wing Powered and Unpowered Flight
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Rotary Wing Powered and Unpowered Flight
Governor flyweights and pilot valve explained.
zhlédnutí 3,1KPřed 4 lety
Governor flyweights and pilot valve explained.
In Viet Nam we did extensive rebuild's.Although the engine man I would rig all the control's people don't realize how hard it is.
V.N. jan.70 we had the experimental huey C mod.come in from Bell at the605th. With Bell engineers.dual hyd.H.D.cobra head,masive rotors and canted tail boom.Flight tested it in country.
We called that one part a sombrero. Obvious
For gyrocopter blade chord is matter? For gyrobee having 210mm chord and 11ft long blade(per blade) but I have 178mm chord and 12.2ft long (per blade) is it ok to use ? Or chord and all to be match?
it's crazy these little gears are handling 500+ shaft horsepower.
Thank you so much for your great video, it helped me a lot in understanding details about rotors
If one engine on a twin-engine plane stalls and the prop fails to feather, will the plane crash ?
What is the maintenance required to the transmission when an overtorque has happened?
you look like a wojak lmao
Круто
Great real-world shot of a complex theory. However how does an engine spinning at 5000rpm engage a rotor that's at standstill and start it spinning up without shredding something?
Great question. The turbine wheel that drives the compressor can turn independently of the turbine that drives the rotor. If you watch some startup videos, the engine will start and reach idle speeds , eventually the rotor catches up.
@@MrSkidkickeryes and I’ve even seen some helos that can have their rotors completely stopped while the turbine is at full idle. Then they release the rotor brake and the rotors slowly start spinning. What I don’t understand is how this can be. How does the turbine exert its effort onto the rotor so gently and slowly. Is it it the exhaust air blowing through the compressor that powers it? Or it is some fancy gear? I don’t understand how it’s able to exert enough force for the rotors to lift a helicopter off the ground, while also allowing that same rotor to come to a full stop. Feels like magic
Great .....All The Best For YOU
Where is the vertical thrust bearing located and is there just one?
best explanation
Fix It Again Tony!!!
Awesome video, it helped me alot. Thanks!!!
As an Aircraft mechanic back in the 90's I worked with a helicopter crew chief who was in Vietnam, he said in comparison they had very little trouble with the wooden rotor blades of the Bell 47
Cool to see. FYI (unless I missed it)... the feathered position is generally the default for multiengines. For a single engine, the default position is the opposite for max power.
Conan the Cimmerian music
Whoever has videoed this should have shown the complete view instead of panning up and down. Good explanation, poor videography
I had a sprag unit fail on a large radio control helicopter in flight, the engine rpm went through the roof but rotor rpm was dropping quickly, I still managed to pull off one of my greatest autorotations of all time. 😀🇦🇺
...that's so cool! thanks for sharing :)
What happens if the transmission fails? Will the rotors continue to spin because to the free wheeling unit? Can you still auto?
Great!!!
"Flaps as a whole unit" means that it teeters.
Thank you
Just found this video. So....why do all modern gyrocopters use only a 2 blade, large diameter flappy rotor? I would think a smaller diameter 3 blade rotor would be less drag, less stick shake, and less retreating blade factor. I think autogyros are great except for how slow they are. If you really want to GO SOMEWHERE, rather than just fly around at 70kts, you need a machine that can cruise at....maybe 120kts. Why so slow. Do you know?
Gyrocopters are as cheap as possible, so they usually have simple two-blade teetering rotors; some even tilt the rotor rather than using cyclic pitch control.
I love the design always have… So for that reason I've always flown radio controlled helicopters at the moment but the newest one is fully articulated. Most are. But the people that came together to invent all of these things made something really remarkable
I like that balanced head. So even number of blades it is. No droop. As RPM increases, allow for more flapping. What if you actually want to roll or pitch the helicopter? Maybe we need a second swashplate to govern the flapping. Maybe gyro forces absolutely dominate and the fuselage only needs a small torque.. or it just dangles like cargo on a rope.
Greetings Mr, IM from Indonesian
From Odisha
Please mobile no
Are you sure reduction to 390 RPM?
100%! Pun intended.
very nice!!!
Brilliant video. Thank you.
question, the AStar spin at approx 390 you said, others spin/operate at more like 245, thats a significant different, for a rotor system, be interesting to hear, understand how a rotor system is designed to gravitate to the one or other end of that rpm range.. can't recall which heli the other was other than it's also a 3 blade design,
What helicopter of the same size (and rotor diameter) turns the main rotor at only 245 RPM? Rotor rotational speed is determined by rotor diameter and desired tip speed (typically roughly Mach 0.8).
This is the airbus h125 gearbox I had to join the 144m monthly overhaul project at last year...
I used to bake buns for Norm. He also went on a search mission for my Dad in cousin in Bisco! Heck of a man!
Fascinating
W professor
surprising that it grips a smooth shaft, that it doesn't have the same number of indents. it should also be possible to design it such that when reversing that it lifts the contacts completely so there is no wear when freewheeling.
Você consegue fazer uma imagem explosiva de cada peça e passar as medidas
what about using high temp materials
I'm not good at english and not good reading at MM but this really big help for me in this video. Thank you for doing this videos. I hope you make another videos thats installed in engine and how does work with a governor,FEEDback ring,beta valve,beta nuts etc.
Great info! Didn't realize they work like helicopter blades.
that was great actually, thanks for the explanation. it was really helpful.
awww...no more magic 😂
Very good 👍
Aircraft props are the most overlooked and misunderstood aspects of aviation. Everyone just seems to take them for granted until they fail.
Concur on that. It is interesting to me to think about while they are doing all that he explained, that there are tremendous forces/environmental factors acting on it at the same time, and yet it stays together/performs safely for many years.
Thank you a lot, awesome info.