Crash at Shoreham Air show

Author
Discussion

CAPP0

19,601 posts

204 months

Wednesday 21st March 2018
quotequote all
saaby93 said:
it's an easy mistake to set the wrong type of pressure and get the height wrong.
With my very limited flying experience, I assume you're referring to QNH vs QFE? Even as a student I knew/know there's a difference, and if someone is going to carry out stunt manoeuvres you'd rather hope they (a) also know the difference and (b) get it right.

Unless of course the tower gave it wrongly.

Can't have been a 315ft difference at Shoreham anyway surely?

Caruso

7,439 posts

257 months

Wednesday 21st March 2018
quotequote all
There may be theoretical rules and limits, but you can't continuously mentally calculate those in real time so you rely on experience, gut feel and a margin of error.

It seems to me in this case the margin for error was not enough to compensate for small mistakes made going into and during the manoeuvre.

TTmonkey

20,911 posts

248 months

Wednesday 21st March 2018
quotequote all
TTmonkey said:
What gets me is he's never made a statement. Never stood up and apologised or expressed his regret. I don't recall him expressing his condolences, maybe he did. But it doesn't seem to be public record.

11 men, the majority not even watching the air show, not involved in any way, taken from their families that day. Minding their own business, going places and doing things.
DELETED: Comment made by a member who's account has been deleted.
I'm sure he had much legal advice.

You don't have to take it, or hide behind it. Even if he's not to blame, he can stand up and express his regrets and condolences. He could make a statement, he didnt have to give a question and answer interview,

Europa1

10,923 posts

189 months

Wednesday 21st March 2018
quotequote all
DELETED: Comment made by a member who's account has been deleted.
In which case he was badly advised, in my view. We have moved away from "expressing contrition = admission of liability".

anonymous-user

55 months

Wednesday 21st March 2018
quotequote all
Caruso said:
It seems to me in this case the margin for error was not enough to compensate for small mistakes made going into and during the manoeuvre.
Personally, if it was me, and I was operating a jet aircraft above a crowd of thousands of people and a busy main road, I would leave a massive margin for error.

saaby93

32,038 posts

179 months

Wednesday 21st March 2018
quotequote all
Caruso said:
There may be theoretical rules and limits, but you can't continuously mentally calculate those in real time so you rely on experience, gut feel and a margin of error.

It seems to me in this case the margin for error was not enough to compensate for small mistakes made going into and during the manoeuvre.
Well yes that's taken as read, it wouldnt have happened otherwise but as far as I can tell we dont know why there wasnt enough margin for error

A pilots not going to loop at 2,700 ft of he knows he needs 3,500ft
So why did he only get to 2700ft?

Edited by saaby93 on Wednesday 21st March 22:52

pip t

1,365 posts

168 months

Wednesday 21st March 2018
quotequote all
saaby93 said:
Would GPS be a more accurate method of height measurement?
Not at the speeds involved I wouldn’t have thought. You only have to look at the lag when you accelerate hard in a car while the GPS speed catches up. In a stable cruise possibly, but not during the kind of manoeuvres engaged in during an air show.
The technology is available - were it better I would assume it would be used in aircraft for that purpose.

Caruso

7,439 posts

257 months

Wednesday 21st March 2018
quotequote all
saaby93 said:
Caruso said:
There may be theoretical rules and limits, but you can't continuously mentally calculate those in real time so you rely on experience, gut feel and a margin of error.

It seems to me in this case the margin for error was not enough to compensate for small mistakes made going into and during the manoeuvre.
Well yes that's taken as read, it wouldnt have happened otherwise but as far as I can tell we dont know why there wasnt enough margin for error

A pilots not going to loop at 2,700 ft of he knows he needs 3,500ft
So why did he only get to 2700ft?
The margin for error, gut feel and experience are down to the pilot. Probably why he's now up for 11 counts of manslaughter by gross negligence and one of endangering an aircraft. There may well be mitigating circumstances that come out during the trial, but these need to come from the pilot now that it seems all other reasons such as mechanical failure etc have not been made an issue by investigations so far.

ian in lancs

3,774 posts

199 months

Wednesday 21st March 2018
quotequote all
saaby93 said:
Well yes that's taken as read, it wouldnt have happened otherwise but as far as I can tell we dont know why there wasnt enough margin for error

A pilots not going to loop at 2,700 ft of he knows he needs 3,500ft
So why did he only get to 2700ft?

Edited by saaby93 on Wednesday 21st March 22:52
apparently too close to the ground to start with, too little power/speed to climb to required altitude at top of loop. That combination didn't result in sufficient clearance to the ground to come out of the dive so he flew it into the ground instead of completing the loop.

saaby93

32,038 posts

179 months

Wednesday 21st March 2018
quotequote all
Caruso said:
saaby93 said:
Caruso said:
There may be theoretical rules and limits, but you can't continuously mentally calculate those in real time so you rely on experience, gut feel and a margin of error.

It seems to me in this case the margin for error was not enough to compensate for small mistakes made going into and during the manoeuvre.
Well yes that's taken as read, it wouldnt have happened otherwise but as far as I can tell we dont know why there wasnt enough margin for error

A pilots not going to loop at 2,700 ft of he knows he needs 3,500ft
So why did he only get to 2700ft?
The margin for error, gut feel and experience are down to the pilot. Probably why he's now up for 11 counts of manslaughter by gross negligence and one of endangering an aircraft. There may well be mitigating circumstances that come out during the trial, but these need to come from the pilot now that it seems all other reasons such as mechanical failure etc have not been made an issue by investigations so far.
some people seem to be missing the point
Surely he'd only think it was safe to continue from 2700 ft if everything was telling him he was at least at 3500ft

you dont think hmm 2700 ft I'll just confim i'm going to hit the ground

anonymous-user

55 months

Wednesday 21st March 2018
quotequote all
saaby93 said:
Lord Marylebone said:
saaby93 said:
Not really - theres more here
https://www.youtube.com/watch?time_continue=11&amp...
What they havent found is why he was too low both at entry or at top of manouevre
Someone suggested earlier it may have been because the altimeter was set wrong
Has anything followed up on that

https://www.gov.uk/aaib-reports/aircraft-accident-...
I'm guessing it is the pilots responsibly to ensure the instruments are reading correctly and set correctly before fight?
I imagine everything has been looked into carefully.
I dont think guessing and imagining are going to be too useful wink

There was enough guessing at the begiing of the thread, about whether as the weather conditions changed the altimeter would be wrong and it's an easy mistake to set the wrong type of pressure and get the height wrong.

At waht point does making a mistake become culpable
Someone else said they only realised theyd got it wrong when the fields were much bigger than they should be coming out of a loop.
Would GPS be a more accurate method of height measurement?
Mistaking 450' for 500' maybe, but he was over 300' lower than he should've been.
There are little mistakes, which a good pilot can recover from or allow for, and then there are glaringly obvious would-have-to-be-almost-wilfully-ignoring-it clear grounds for an abort mistakes.
A lot of the figures point to the latter.

anonymous-user

55 months

Wednesday 21st March 2018
quotequote all
saaby93 said:
some people seem to be missing the point
Surely he'd only think it was safe to continue from 2700 ft if everything was telling him he was at least at 3500ft

you dont think hmm 2700 ft I'll just confim i'm going to hit the ground
The thing is, with some manoeuvres, the point at which it becomes "obviously" flawed beyond all doubt are often past the point at which a recovery can be initiated.
It's also a measure of professionalism as to how much of a margin of error a pilot is willing to accept. It seems in this case the pilot thought he could nibble much further in to the limits than anyone else seems to consider reasonable, hence he'll probably do some time inside.

saaby93

32,038 posts

179 months

Wednesday 21st March 2018
quotequote all
Crossflow Kid said:
saaby93 said:
some people seem to be missing the point
Surely he'd only think it was safe to continue from 2700 ft if everything was telling him he was at least at 3500ft

you dont think hmm 2700 ft I'll just confim i'm going to hit the ground
The thing is, with some manoeuvres, the point at which it becomes "obviously" flawed beyond all doubt are often past the point at which a recovery can be initiated.
It's also a measure of professionalism as to how much of a margin of error a pilot is willing to accept. It seems in this case the pilot thought he could nibble much further in to the limits than anyone else seems to consider reasonable, hence he'll probably do some time inside.
what have you seen that suggests that?

Chuck328

1,581 posts

168 months

Wednesday 21st March 2018
quotequote all
Lord Marylebone said:
Personally, if it was me, and I was operating a jet aircraft above a crowd of thousands of people and a busy main road, I would leave a massive margin for error.
This is pretty much what it comes down to. His day job legally and procedurally provides him with massive safety margins. On this occasion he failed to add them in.


saaby93

32,038 posts

179 months

Wednesday 21st March 2018
quotequote all
Chuck328 said:
Lord Marylebone said:
Personally, if it was me, and I was operating a jet aircraft above a crowd of thousands of people and a busy main road, I would leave a massive margin for error.
This is pretty much what it comes down to. His day job legally and procedurally provides him with massive safety margins. On this occasion he failed to add them in.
what have you seen that suggests that?

anonymous-user

55 months

Wednesday 21st March 2018
quotequote all
saaby93 said:
Chuck328 said:
Lord Marylebone said:
Personally, if it was me, and I was operating a jet aircraft above a crowd of thousands of people and a busy main road, I would leave a massive margin for error.
This is pretty much what it comes down to. His day job legally and procedurally provides him with massive safety margins. On this occasion he failed to add them in.
what have you seen that suggests that?
The deaths of 11 people?

saaby93

32,038 posts

179 months

Wednesday 21st March 2018
quotequote all
Lord Marylebone said:
saaby93 said:
Chuck328 said:
Lord Marylebone said:
Personally, if it was me, and I was operating a jet aircraft above a crowd of thousands of people and a busy main road, I would leave a massive margin for error.
This is pretty much what it comes down to. His day job legally and procedurally provides him with massive safety margins. On this occasion he failed to add them in.
what have you seen that suggests that?
The deaths of 11 people?
That could be any number of things - I was asking what led chuck to belive he failed to add in a margin?
If the AIB thinks 3500 ft was what would noramally be required and you add in a couple hundred feet of margin thats 3700 ft
How did he end up with 2700ft?
(On that basis he performed a miracle with it pancaking gradually into the trees)

Chuck328

1,581 posts

168 months

Thursday 22nd March 2018
quotequote all
saaby93 said:
That could be any number of things - I was asking what led chuck to belive he failed to add in a margin?
Try this (posted the page before) for starters...

Not only was there no margin for error, the whole maneuver was well below regarded safe parameters.

https://news.sky.com/story/shoreham-airshow-disast...


anonymous-user

55 months

Thursday 22nd March 2018
quotequote all
saaby93 said:
Crossflow Kid said:
saaby93 said:
some people seem to be missing the point
Surely he'd only think it was safe to continue from 2700 ft if everything was telling him he was at least at 3500ft

you dont think hmm 2700 ft I'll just confim i'm going to hit the ground
The thing is, with some manoeuvres, the point at which it becomes "obviously" flawed beyond all doubt are often past the point at which a recovery can be initiated.
It's also a measure of professionalism as to how much of a margin of error a pilot is willing to accept. It seems in this case the pilot thought he could nibble much further in to the limits than anyone else seems to consider reasonable, hence he'll probably do some time inside.
what have you seen that suggests that?
24 years on front line support helicopters with the RAF including one season as display crew do ya?
Entering a manoeuvre where the minimum height required is 500" at say, 475' is a bit cheeky but recoverable as the margin is small and a pilot "might" be able to justify it, or at least get away with it and quietly learn a lesson for next time.
Entering the same manoeuvre over 300' out, well below half the height required, and not thinking that's a problem is madness or negligence or both.

Edited by anonymous-user on Thursday 22 March 01:50

anonymous-user

55 months

Thursday 22nd March 2018
quotequote all
saaby93 said:
If the AIB thinks 3500 ft was what would noramally be required and you add in a couple hundred feet of margin thats 3700 ft
How did he end up with 2700ft?
A few options there:
1) the instruments were faulty/incorrectly set although the inquiry would reveal that.
2) the pilot misread the instruments (several times) and ignored other visual cues ("oooh, the trees look big!")
3).the pilot knew he was below the recommended height but decided a combination of the aircraft's performance and his ability to squeeze that performance out of it would make up the shortfall.

It would seem the AAIB et al have gone for option 2 or 3, both of which involve a degree of negligence.