Three things needed rolling motion, exceedingly the critical angle, and a pivot point. Glad to see the response of dumping the collective before exceeding that angle!
Left pedal left pedal 😮 I’m still learning to pick up and don’t care how long it takes before the skids become light. Scary situation but good catch and way to start powering down to debrief and get the stress out before going back
Was this a weight and balance issue? I imagine this student was used to the weight of the instructor being in there and tried to solo. When he used his normal amount of right cyclic it was too much for the different center of gravity, and that’s what initiated dynamic rollover.
nicholas beattie You are correct that is very common but in this particular case he was already rated and working on commercial. He parked the helicopter on the ramp right on top of sticky hot tar and it momentarily held the skid down. It broke free about the time he lowered collective. The short video helps me show students how important a slow pickup is. Adam caught it and has learned to slow way down and be sure nothing is stuck
Gary Cleveland thanks for the reply! That makes sense. I hadn’t considered hot tar, but it’s a perfect culprit. I learned from this, thanks for posting. Great job to the pilot on the corrective action as well.
@@garycleveland2989 I got schooled today. I only fly RC's but I always thought it was the opposite. I thought it was lack of commitment by the pilot but I notice that seasoned pilots lift off slowly. If I always pitch it hard, sooner or later this will happen.
@@garycleveland2989 Yah man, maybe I don't understand what you're saying, but the right skid is the one that doesn't come up, but it's the left skid that's across the tar. So that doesn't make any sense to the theory that the tar is what made it stick. Plus the left skid moves laterally before rising in the air, so obviously it's not stuck. If the tar was sticking to the skid and holding it down, then it should have been the left that stayed and the right skid would be flying up. Help me out here.
Was this a supervised solo? I ask because the dual controls are still in. Lowering the collective immediately was the right thing to do. Curious though, the R-22 tends to pick-up right skid first (even with a 200 lb. guy in the right seat) Too much right cyclic? I am a 25 year Gold Seal/Master Instructor with a 99.8% pass rate on over 200 students. I tell my students ... "I'd rather you take 5 minutes and pick it up slowly than to raise the collective that fast." I know, everybody's got an opinion, right? I assume since you put the video on RU-vid you were looking for comments.
You don’t know how stuck your skid is. Experience shows that the use of smooth collective is more effective in avoidin rollover problems than using cyclic. W J wagtendonk principles of helicopter fligt
Also, I would imagine if you can do this in an R-22 you could help me do it in my R-44. Since I’m new to the aviation world, I wanna get as much safety training and dealing with any kind of mishaps as possible.
Static rollover is no lift vector and about a 45 degree angle, pulled over by gravity. Dynamic is with a lift vector pulling lateral and the helicopter pivots to the point of 5-8 degrees and then pulled on over by the main rotor.
The lift vector changes from vertical to more horizontal, which is a problem if there is a pivot point (like a skid). The cause could either be a stuck skid or that the cyclic is not centered for the pickup. In this video, a skid was stuck on fresh tar.
Pbbt. Obviously needed a bit more Johnson Spar and less Mhors Colander. Now I’ve never flown in a helicopter and don’t know anything about them, but it seems painful obvious to me.
Tony Dean I wish it was. But for fun let’s play that out lol. Lift the collective and you lift. You lift and you create torque. So apply left peddle to counter the extra torque. Then your tail rotor wants to make you slide to the right so you have to counter that with the cyclic. Any movement made in one control effects all the others. The best part is when it’s no longer a thought and you can just do it naturally by feel.
It is an interaction between rotor imbalance, and landing gear natural frequency and dampening, the main issue is when rotor frequency matches the landing gear natural frequency. Think the landing gear as a car suspension.
Anton Ramirez The helicopter flying handbook says to lower collective. Although human instinct makes us want to go lateral cyclic, lateral cyclic is ineffective during the rolling moment.
Think if it like a fire. A fire needs Oxygen (air), heat, and fuel to burn. Eliminate one of those and no fire. You are limited on how far to the side you can move the cyclic and it may not even help cause with lift + stuck pedal you will roll. Eliminate the lift and you are getting rid of what is making you roll.
