Helicopter down outside Leicester City Football Club
GBB...I don't think members of the helicopter community should be suggesting " helicopters are inherently dangerous" or that you "can't recover from a tail rotor failure".Ive been flying helicopters for over 40 years, practised autorotation after a tail rotor failure 100s of times and never been involved in an accident. We should all be talking about how safe helicopters are these days ,not talking them down.
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Torquetorque. I think the line of inquiry this rumour network is currently going down, and I stress RUMOUR\CONJECTURE is that the tail rotor failed due to it hitting something, either ac backing up and clipping something or for whatever reason a decent post TDP and again tail rotor strike. Pure tail rotor drive failure would be very rare and unlucky- but not impossible.
Torquetorque. I think the line of inquiry this rumour network is currently going down, and I stress RUMOUR\CONJECTURE is that the tail rotor failed due to it hitting something, either ac backing up and clipping something or for whatever reason a decent post TDP and again tail rotor strike. Pure tail rotor drive failure would be very rare and unlucky- but not impossible.
It looks taking off from a bottom of a bucket IT IS NOT normal operations
For those that think a recovery from TR failure in such a situation where you are low (<400ft), climbing vertical or backup t/o profile using lots of power is as simple as entering autorotation and guiding the a/c to a landing site then I challenge you to have a go in a realistic sim. Not at 1000ft doing 60 kts in the day. Make it 200ft with 100% torque at night and for realism throw in a 3 second delay. Let me know how you get on.
These types of operations are normal, of course they are. Helicopters fly these profiles in challenging conditions every day so please don't think this was an abnormal operation.
If you are referring to the poorly powered heavy twin 206 that ran out power then it's not the same as a complete TR failure which is a POSSIBLE consideration here.
These types of operations are normal, of course they are. Helicopters fly these profiles in challenging conditions every day so please don't think this was an abnormal operation.
If you are referring to the poorly powered heavy twin 206 that ran out power then it's not the same as a complete TR failure which is a POSSIBLE consideration here.
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These crews have been picking up the owner from that same place week after week after week for many years so actually it IS normal operations for them,
Avoid imitations
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if you watch the video is shows them doing a 180’ spot turn. Which if they landed into wind would now put them down wind. That is assuming when they landed they didn’t turn.. would need to see all the footage to be sure. However looking at google earth there are some nasty 200’+ wires to the north. Departing into a prevailing SW’ly down the river valley along the open ground would be a much more appealing departure direction.
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Just to let anyone know that doesn't realise, the video isn't from last night, you can see the Champions League hoardings in the background. And the 'final moments' video is also not from last night.
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I really can't provide an answer to that. Perhaps the wind velocity wasn't seen as the over-riding factor. It's not totally out of the ordinary to have to depart downwind because that's the only way out of a landing site. For private ops, "Cat A" isn't a mandatory requirement, although it is preferable, for obvious reasons.
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In one of the pictures of the wreck, correct me if I am wrong, but I think one of the tail rotor blades can be seen and it is in one piece and not bent. From this one could assume no collision with a fixed object and not under power when it hit the ground.
So may be a failure in the transmission. Did anybody else notice this?
So may be a failure in the transmission. Did anybody else notice this?
I really can't provide an answer to that. Perhaps the wind velocity wasn't seen as the over-riding factor. It's not totally out of the ordinary to have to depart downwind because that's the only way out of a landing site. For private ops, "Cat A" isn't a mandatory requirement, although it is preferable, for obvious reasons.
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police name all on board
Sky news have published the police statement at 22.09.
May they all RIP.
https://news.sky.com/story/live-leic...crash-11538203
May they all RIP.
https://news.sky.com/story/live-leic...crash-11538203
The five people were on board the helicopter when the incident happened. While formal identification has not yet taken place, they are believed to be Leicester City Football Club chairman Vichai Srivaddhanaprabha, two members of his staff, Nursara Suknamai and Kaveporn Punpare, pilot Eric Swaffer and passenger Izabela Roza Lechowicz.
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In one of the pictures of the wreck, correct me if I am wrong, but I think one of the tail rotor blades can be seen and it is in one piece and not bent. From this one could assume no collision with a fixed object and not under power when it hit the ground.
So may be a failure in the transmission. Did anybody else notice this?
So may be a failure in the transmission. Did anybody else notice this?
It is there.....just read the latest update that lists the names.
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It seems clear they made a towering departure facing downwind, encountering a tailwind component of perhaps 15-20 Kts once they came above the shelter of the stadium roof.
That being the case I suggest that if - and I emphasise IF, a tailrotor failure occurred the scant chance of a recovery from a higher power condtion than a high hover at that height goes from scant to zip. However another more feasible scenario crosses my mind.
It would be very useful to know about the tail rotor authority/control characteristics of this type in high power, downwind conditions at a representative weight. Anyone familiar on type care to comment?
It seems to me that the combination of a sudden onset downwind exposure followed by a spiralling, out of control descent is perhaps more likely to be relevant than the highly unlikely coincidence of a t/r failure just at that critical point. This followed by a rapid dump of the collective in an attempt to recover Nr would fit with an eyewitness reporting a gear-crunching noise (I paraphrase) - perhaps blade stall - followed by relative silence as pitch is reduced.
I can easily visualise a scenario where a tailwind surprises you at 300ft, high power and downwind with the result we've all seen. A bootful of pedal to stop the yaw, a natural grab at the lever to curb the suddden descent and all of a sudden you're spinning, overpitched, Nr plummeting...
I hope to hell this doesn't turn out to be another pressonitis event like Battersea or Gillingham but I'm not holding my breath.
Any input on that downwind tail rotor authority?
Whatever the cause this accident is so in the public eye that helicopters in general are taking vast amounts of abuse (ignorant abuse but damaging nonetheless) in the media and net. If we are unlucky ths sort of hysteria could well lead to irrational knee-jerk reactions similar to those that all but destroyed vintage jet displays and virtually eradicated inland airshows altogether after Shoreham. I sincerely hope my fears are unfounded.
My other feeling is that some of the TV coverage of their departure seems to end rather abruptly. I'd expect the camera to keep rolling until the helo had disappeared from sight so there may well be good, high definition video of the event in the hands of the authorities. Equally I'd be astonished if there are not several amateur videos from outside the stadium that haven't seen the light yet. They may well help.
Last edited by meleagertoo; 28th Oct 2018 at 23:10.