actually seems as though the description or illustration is a great one to show SWP, but the explanations are not entirely accurate. Not far off but not accurate. SWP happens when you have 3 things, High decent rate, All or some power (and pitch to blades trying to produce lift) and finally, under ETL or effective translational lift a.k.a. no lateral airspeed
In an autorotative state, the collective must be lowered to "flatten out" the blades, thus allowing them to be Driven by the upward flow of air aka Autorotation. Opposite of settling with power, where you would have pitch still in the equation. If you didnt take pitch out of blades in an auto, you would lose all inertia in the system and the blades would stop spinning due to drag
All aircraft designs mean there will be some differences in how it reacts or how the pilot should react as well. In general, this provides a basis for further detailed discussion for particular situations as you show below.
Kind of a misnomer. Windmill Brake state is more aligned with the end of an autorotation. I suppose if you did nothing to recover from the Settling with Power condition that you would pass through the Autorotative State and so on.
Really this gets to the static airflow sequences through a rotor disk from and much of it is concentrated with SWP.
hello, something I don't understand, at high descent velocity you say it extract energy like a windmill, how is it possible without twist the spin of rotator?
- It is not a normal operating state for the rotor system; some energy must be extracted to prevent a rotor overspeed. This can usually be accomplished by increasing collective pitch, which adds more drag to the system.
So is it possible to land OK coming straight down w/ no vertical air speed and without a special high inertia rotor system? Does full down collective have to pitch the blades negative? How much?
it is possible to come straight down, but it is usually not recommended nor safe. you gain a significant amount of lift with forward airspeed. the blades will not be negative. the relative wind actually shifts to such a degree that on a large part of the blades you will have a greater angle of attack
it is impossible to read the last pop up. it shoes exactly as the video ends! I really want to read that! Can you make that happen or message me the last paragraph?
@toddj8633 Not at all impossible! Just STOP the vid using the 'start/stop' button on the left of the control ribbon. If needed, position the cursor at about 1:35, click to run from there, and 'stop' immediately the last pop-up paragraph appears on screen.
perhaps some audio might help.
having more than one stimuli often helps retention of information in many people. Also makes for more enjoyable veiwing.
thanks for posting, look forward to seeing more.
MrBraden007 1 year ago
@MrBraden007
Good idea. Although I have many instructors who use these videos to teach from and it allows them to discuss as it plays.
burgesco1 1 year ago
@burgesco1 oh ok, they could mute the sound?
MrBraden007 1 year ago
@burgesco1
MUTE? /facepalm
ToWi1989 8 months ago
actually seems as though the description or illustration is a great one to show SWP, but the explanations are not entirely accurate. Not far off but not accurate. SWP happens when you have 3 things, High decent rate, All or some power (and pitch to blades trying to produce lift) and finally, under ETL or effective translational lift a.k.a. no lateral airspeed
joseppi2219 1 year ago
In an autorotative state, the collective must be lowered to "flatten out" the blades, thus allowing them to be Driven by the upward flow of air aka Autorotation. Opposite of settling with power, where you would have pitch still in the equation. If you didnt take pitch out of blades in an auto, you would lose all inertia in the system and the blades would stop spinning due to drag
joseppi2219 1 year ago
@joseppi2219
All aircraft designs mean there will be some differences in how it reacts or how the pilot should react as well. In general, this provides a basis for further detailed discussion for particular situations as you show below.
burgesco1 1 year ago
it's a workout
KALEIDOSCOPEN 1 year ago
Lol, just when I watched this video.. A helicopter flies over my house..
ThaisBlackXboxLive 1 year ago
Excellent visual example of SWP. Govt. computers cannot access Youtube, but I would like to use it for a brief. Is there another way to access this?
Thank you,
T
teembo100 2 years ago
Kind of a misnomer. Windmill Brake state is more aligned with the end of an autorotation. I suppose if you did nothing to recover from the Settling with Power condition that you would pass through the Autorotative State and so on.
Really this gets to the static airflow sequences through a rotor disk from and much of it is concentrated with SWP.
burgesco1 2 years ago
Excellent visual example of SWP. Govt. computers cannot access Youtube, but I would like to use it for a brief. Is there another way to access this?
Thank
teembo100 2 years ago
sorry "rotor"?
kalish86 2 years ago
hello, something I don't understand, at high descent velocity you say it extract energy like a windmill, how is it possible without twist the spin of rotator?
kalish86 2 years ago
It says:
- It is not a normal operating state for the rotor system; some energy must be extracted to prevent a rotor overspeed. This can usually be accomplished by increasing collective pitch, which adds more drag to the system.
Dem0nHamster 2 years ago
So is it possible to land OK coming straight down w/ no vertical air speed and without a special high inertia rotor system? Does full down collective have to pitch the blades negative? How much?
LarryCanFly 2 years ago
it is possible to come straight down, but it is usually not recommended nor safe. you gain a significant amount of lift with forward airspeed. the blades will not be negative. the relative wind actually shifts to such a degree that on a large part of the blades you will have a greater angle of attack
torpedo0126 1 year ago
it is impossible to read the last pop up. it shoes exactly as the video ends! I really want to read that! Can you make that happen or message me the last paragraph?
toddj8633 2 years ago
@toddj8633 Not at all impossible! Just STOP the vid using the 'start/stop' button on the left of the control ribbon. If needed, position the cursor at about 1:35, click to run from there, and 'stop' immediately the last pop-up paragraph appears on screen.
Simples!
7sinbad7 1 year ago