Mischa, congratulations on one of the best aviation safety videos. Its also way up there in terms of quality of of content and ease of understanding of "dynamic rollover". The other explanations of helicopter classic subjects are also excellent explanations and demonstrations.
Thanks so much. I have been looking forward to getting more information on this and really appreciate your taking the time to address it. Thanks also for the partial demonstration with the recovery and prevention advice.
Good video about dynamic rollover, Mischa. But you omitted one big factor in getting into it: Yaw. If a skid is stuck and you don't have your yaw trim just right, tail rotor thrust will cause the ship to roll to the right. The T/R is way behind the pivot point, remember, giving it lots of leverage. No amount of left cyclic will stop the roll - only lowering the collective will. Yaw trim is SUPER important when lifting off from sketchy surfaces.
Hi, interesting difference in instruction philosophy. I had been trained from private through CFI (and trained my own students) to fix dynamic rollover only with down collective, since the net moment of a full cyclic deflection away from the pivot point would still be towards the pivot point once a significant roll has started. I had always thought of/taught static rollover as pertaining to when the blades were stopped, not as separate phase of the 'dynamic rollover' process. Considering how fast a roll can happen with a newer student who might be too eager with collective on takeoff, I feel safer having them immediately lower collective rather than take the millisecond to judge wether the angle is too extreme for a recovery with the cyclic.
You are absolutely correct. Static rollover happens without aerodynamic forces, when rotors stopped and typically while jacking up one side. Here the rollover happens after the CG goes out of the wheels. Dynamic rollover tip over point is far much earlier
@@venkyvenkatesh999 Let's not forget crosswinds... Down collective is the only remedy, unless full power n up collective can pull you up immediately, opposite cyclic won't help
Good points as always. This Video training expressing your experience will probably save lives! Thank You and I appreciate your experience and dedication to Aviation! Because of your channel, and others, I plan to get my Helicopter License in the near future!
Always have a multi tool on you for landing spot inspection where you suspect a hazard could exist - would be what I’d take away from this. Brilliant videos and content
My favorite racecar driver, Davey Allison, was killed by in a helicopter accident. Dynamic Rollover was listed as the cause. He was trying to land close to some buildings.
Awesome thank you so much! When i train for a. License it will be with you, i like your teaching style also, the way you encourage students instead of criticizing 👌
Good video. Question: is it possible to roll a helicopter over while in flight. While flying a Jet Ranger 206 simulator I attempted a very sharp turn with the intention of backtracking. I wasn't paying attention to the airspeed, which was quite low. I input lots of cyclic to the left, but didn't use much pedal. Suddenly the horizon flipped over and I flew inverted into the "ground". Talk about an unintentional maneuver.
I know weight is always the enemy, but I wonder with modern lightweight 'chip' cameras, if it would be possible for manufacturers to put a cam lens in the front curve of the tailboom, integrated into the PFD (in the case of the Cabri), which would provide a view of the skids during takeoff/landing. It's one area that has zero visibility. The interface would be a challenge to find room in the PFD, certainly, but pilots who do frequent off-field landings on complex surfaces might consider it a desirable option. I thought your story was great and I'm sure it will help a pilot who never thought of snagging something like that!
That's a cool idea. It would be nice to have a down/rearward view from underneath the cabin. Basically the same view as a backup camera in most cars these days. Would also give you a view of obstacles behind you that could interfere with your tail rotor.
Hi there. It was a nice explanation. However, many other conditions can lead to dynamic rollover, such as drifting sideways while pick up or sit dow. Strong especially gusty beam winds exceeding transition speed of the helicopter can induce serious dynamic rollover, which is lot more complicated to recover from. Once the roll over sets in the rate of roll can exceed the lateral control power of the cyclic, rendering recovery with cyclic impossible. And most important to study the tipping forces and moments and restoring forces and moments. Incidentally, rotor thrust forms major part of tipping force and hence should never try to lift off once the rollover starts. Weight is major restoring force and hence lowering collective restores the helicopter from the impending rollover
GREAT vid and explaination sir. But just one question staic rollover is a condition when rotors are not engaged and with effect of winds of slope..cg shifts out and rollover takes place. please correct me if am wrong. thanks..
Mischa I would love to be in your area in order to go to your flight school! If I ever run into some good money you guys are first in my list!!👍😅😂 Thanks for teaching us so many interesting subjects in helicopter flying
Another thing that helps is not flying Robinson's which all have that dorky looking, super long main rotor shaft that raises it's overall CG making the roll much quicker if a skid sticks.
A turbine engine above the cabin has a higher cg than the Robinson’s low mounted piston engine. The reason for the long mast is to prevent the main rotor from striking the tail boom. Take a look at a 206 and visualize it with the rotors in the same spot and without the engine compartment, the the mast would look equally long.
are you charging simon for the time that you talk into the camera? i would feel uncomfortable knowing that i just lost 50$ while my instructor talks to a camera.
It's the difference between falling over and being pulled over by main rotor thrust. For any helicopter, there's a limit to how far you can tilt the rotor disc relative to the fuselage by using the cyclic. If the cabin begins to roll (because of CG or because part of the heli is pinned to the ground), you can initially use cylic inputs to keep the disc level with the horizon, and thus pulling the helicopter straight up off the ground. If the cabin tilt angle exceeds the maximum cyclic throw (you run out of stick), the rotor becomes tilted with respect to the horizon and you end up with the rotor thrust pulling up and to the side; since the helicopter can't go up (it's stuck on something) only the sideward component manifests itself and the helicopter gets yanked over onto its side. The only way you can stop the rollover once you run out of cyclic is to take the thrust away by lowering the collective.
@ChavzRo, It's like anything, it's only as dangerous as you make it. Keep your wits about you, watch what the aircraft is doing and what the instrumentation is telling you. Early hours, solo pilots (like myself) have a habit of not having a lot of situational awareness, you learn quick or don't get to.
I've heard pilots who are both fixed wing and rotary certified say that the real difference between planes and helicopters is that planes want to fly, helicopters don't. Helicopters will fight you every step of the way and you have to beat them into submission just to get off the ground. 🤣
1st time passenger to pilot .Whats that big fan up there for?Pilot thats to keep me cool.Passenger.To keep you cool?Pilot Yea that thing stops you watch me sweat!
Dynamic rollover is usually followed by dynamic disassembly.
LOL was thinking the same thing.
LOL!
obsolete professor ...followed by a dynamic butt kicking!😱😠
🤣🤣🤣🤣🤣🤣🤣
Pilot Yellow, I really appreciate these videos. Your teaching style clicks with me and you seem like an excellent teacher.
Your channel is the gift that keeps on giving, thanks for keeping this up!
Mischa, congratulations on one of the best aviation safety videos. Its also way up there in terms of quality of of content and ease of understanding of "dynamic rollover". The other explanations of helicopter classic subjects are also excellent explanations and demonstrations.
Thanks so much. I have been looking forward to getting more information on this and really appreciate your taking the time to address it. Thanks also for the partial demonstration with the recovery and prevention advice.
Good video about dynamic rollover, Mischa. But you omitted one big factor in getting into it: Yaw. If a skid is stuck and you don't have your yaw trim just right, tail rotor thrust will cause the ship to roll to the right. The T/R is way behind the pivot point, remember, giving it lots of leverage. No amount of left cyclic will stop the roll - only lowering the collective will. Yaw trim is SUPER important when lifting off from sketchy surfaces.
That Bob Guy translating tendency will pull the fuselage over the pivot point?
Another great video... Thanks guys ;) I have the attitude that "Every take-off can kill you" . . . until it doesn't. Keep up the good work :)
That's a great attitude to have.
Hi, interesting difference in instruction philosophy. I had been trained from private through CFI (and trained my own students) to fix dynamic rollover only with down collective, since the net moment of a full cyclic deflection away from the pivot point would still be towards the pivot point once a significant roll has started. I had always thought of/taught static rollover as pertaining to when the blades were stopped, not as separate phase of the 'dynamic rollover' process. Considering how fast a roll can happen with a newer student who might be too eager with collective on takeoff, I feel safer having them immediately lower collective rather than take the millisecond to judge wether the angle is too extreme for a recovery with the cyclic.
You are absolutely correct. Static rollover happens without aerodynamic forces, when rotors stopped and typically while jacking up one side. Here the rollover happens after the CG goes out of the wheels.
Dynamic rollover tip over point is far much earlier
@@venkyvenkatesh999
Let's not forget crosswinds...
Down collective is the only remedy, unless full power n up collective can pull you up immediately, opposite cyclic won't help
8:01 Great advice.
fantastic story and explanation
Good points as always. This Video training expressing your experience will probably save lives! Thank You and I appreciate your experience and dedication to Aviation! Because of your channel, and others, I plan to get my Helicopter License in the near future!
Always have a multi tool on you for landing spot inspection where you suspect a hazard could exist - would be what I’d take away from this. Brilliant videos and content
My favorite racecar driver, Davey Allison, was killed by in a helicopter accident. Dynamic Rollover was listed as the cause. He was trying to land close to some buildings.
Awesome thank you so much! When i train for a. License it will be with you, i like your teaching style also, the way you encourage students instead of criticizing 👌
Thank you for explaining it how to not get into dynamic rollover and most importantly how to correct it if that happens.
Good video. Question: is it possible to roll a helicopter over while in flight. While flying a Jet Ranger 206 simulator I attempted a very sharp turn with the intention of backtracking. I wasn't paying attention to the airspeed, which was quite low. I input lots of cyclic to the left, but didn't use much pedal. Suddenly the horizon flipped over and I flew inverted into the "ground". Talk about an unintentional maneuver.
I know weight is always the enemy, but I wonder with modern lightweight 'chip' cameras, if it would be possible for manufacturers to put a cam lens in the front curve of the tailboom, integrated into the PFD (in the case of the Cabri), which would provide a view of the skids during takeoff/landing. It's one area that has zero visibility. The interface would be a challenge to find room in the PFD, certainly, but pilots who do frequent off-field landings on complex surfaces might consider it a desirable option. I thought your story was great and I'm sure it will help a pilot who never thought of snagging something like that!
That's a cool idea. It would be nice to have a down/rearward view from underneath the cabin. Basically the same view as a backup camera in most cars these days. Would also give you a view of obstacles behind you that could interfere with your tail rotor.
I know this is 8 months late but I do believe the new Airbus H160 does in fact have a tailboom camera, pretty neat.
That student pilot looks extremely nervous!
Hi there. It was a nice explanation. However, many other conditions can lead to dynamic rollover, such as drifting sideways while pick up or sit dow. Strong especially gusty beam winds exceeding transition speed of the helicopter can induce serious dynamic rollover, which is lot more complicated to recover from. Once the roll over sets in the rate of roll can exceed the lateral control power of the cyclic, rendering recovery with cyclic impossible.
And most important to study the tipping forces and moments and restoring forces and moments.
Incidentally, rotor thrust forms major part of tipping force and hence should never try to lift off once the rollover starts.
Weight is major restoring force and hence lowering collective restores the helicopter from the impending rollover
thanks for sharing this experience with us
Another great video. Slow controlled take offs is always a great idea.
Can you do something on tail strikes? What about main rotor hitting the tail boom? Thanks Mischa.
Good video thanks.also what's your thoughts on the misquote helicopter
I would be very cautious about taking this advice!
GREAT vid and explaination sir. But just one question staic rollover is a condition when rotors are not engaged and with effect of winds of slope..cg shifts out and rollover takes place.
please correct me if am wrong.
thanks..
Awww, Poor lad looks terrified :3
Good information... 👍
Is there a laser warning system on the helicopter wing that can alert the pilot of obstacles in the rotor range?
Oh, that's right! I know 5 people who went or are going down there this month.. & I had an invitation..
Isn't there such a thing as a pre-flight check that could include the skids?
Mischa I would love to be in your area in order to go to your flight school! If I ever run into some good money you guys are first in my list!!👍😅😂 Thanks for teaching us so many interesting subjects in helicopter flying
Thanks!
Another thing that helps is not flying Robinson's which all have that dorky looking, super long main rotor shaft that raises it's overall CG making the roll much quicker if a skid sticks.
A turbine engine above the cabin has a higher cg than the Robinson’s low mounted piston engine. The reason for the long mast is to prevent the main rotor from striking the tail boom. Take a look at a 206 and visualize it with the rotors in the same spot and without the engine compartment, the the mast would look equally long.
Drifting and strong beam winds I mentioned pertain to when one skid on ground.
Thnks again man. Great experience and lesson
I had landed and hadn't lowered the collective fully and wind cause Dynamic rollover scared the shit of me. Instinctively I corrected with cyclic.
How come there aren’t more cases of dynamic rollover in military flying?
Always good stuff. Thanks.
That's what happen to one of our fellow student. Good explanation Thanks!!!
Awesome video thanks
good reason to maybe have some bottom-mounted cameras?
good job guys I am not a pilot but its great
Can you please show us static roll over please?
Every time I do a pickup I mentally get ready for DR, coz it can happen sooooo quickly!
Dude on the left is looking like lets get this thing rolling.
Hobbs is running at 450 bucks and hour, get this shit airborne
Looks like he about to kill me when looking at camera. 🤣🤣
are you charging simon for the time that you talk into the camera?
i would feel uncomfortable knowing that i just lost 50$ while my instructor talks to a camera.
150.00
nice try, simon
Petty! Situational awareness... bad faith...your comment... it is part of his training don't you think?
What is the difference between static vs dynamic rollover?
It's the difference between falling over and being pulled over by main rotor thrust. For any helicopter, there's a limit to how far you can tilt the rotor disc relative to the fuselage by using the cyclic. If the cabin begins to roll (because of CG or because part of the heli is pinned to the ground), you can initially use cylic inputs to keep the disc level with the horizon, and thus pulling the helicopter straight up off the ground. If the cabin tilt angle exceeds the maximum cyclic throw (you run out of stick), the rotor becomes tilted with respect to the horizon and you end up with the rotor thrust pulling up and to the side; since the helicopter can't go up (it's stuck on something) only the sideward component manifests itself and the helicopter gets yanked over onto its side. The only way you can stop the rollover once you run out of cyclic is to take the thrust away by lowering the collective.
Great!
Should't be there a camera to show your skids? Just like a backup camera in a car...
How much is the hourly lessons?
300-350
How aboot that!!
0:00 off topic, but Simon looks like he has a joke he's just itching to yell out
You may need to spep out and move that log.
#oing a max takeoff sounds like where the problem occurred
Landing on the shore line. It's all quicksand over time.
I have dynamic rollover every time I try to get out of bed.
Simon looks a little nervous as you're explaining the drill.
How to avoid dynamic rollover, hows about just going up and doing the landing again, instead of risking it...occam's razor ...
I didn't really know how complex helicopter flying was. That machine wants to kill you all the time!!
@ChavzRo,
It's like anything, it's only as dangerous as you make it.
Keep your wits about you, watch what the aircraft is doing and what the instrumentation is telling you.
Early hours, solo pilots (like myself) have a habit of not having a lot of situational awareness, you learn quick or don't get to.
I've heard pilots who are both fixed wing and rotary certified say that the real difference between planes and helicopters is that planes want to fly, helicopters don't. Helicopters will fight you every step of the way and you have to beat them into submission just to get off the ground. 🤣
1st time passenger to pilot .Whats that big fan up there for?Pilot thats to keep me cool.Passenger.To keep you cool?Pilot Yea that thing stops you watch me sweat!
That guy doesn't look like he wants to be there lmao
Great video! Thanks for the story about the log. Could happen easily. I posted a video of me flying on my IG account theghardin if you want to see it.
Guaranteed Home, LLC great I’ll check it out.
And that was a Dynamic lesson... 🤔
Most painful example of dynamic rollover, search helicopter tows boat... slow painful pilot had a lot of time to reflect on his mistake
The guy beside you does not look like he has a lot of faith in what you are about to do.He really looks nervous!
Poor sound when not flying. Please use a headset that does not have breath-popping and plosives.
You guys brothers ? U shore do look alike !
I’ve got a better idea fly fixt wing instead much safer 👍
...until your engine quits mid flight and you don't happen to have a couple hundred feet of flat surface handy 😉
Im a Canadian.I when im waffling i like maple syrup.Thus I create a sticky situation!
Good video.... but your buddy wouldn't shut up.
99% of the comments come from average 16.000 flight hours frustrated pilots
I got my skid stuck once and I flipped over when she divorced me.
k ra, c fala d+
Pilot looks as though he hasn’t a clue what the guy on his left is saying.
Thats a sobering story. Might be a good idea to have 2 little wide FOV parking cameras that show the skids...