Is RAF grounded as well ?
ACW599,
Correct. PZ865 was up yesterday. Today was just 41 Squadron and a practice by the Dakota that wasn't broadcast on the DATIS.
Fake Sealion,
It was yesterday (21st). There was a broadcast for all aircraft to return. DATIS by about 15:30 local was broadcasting "No further take-offs"
TJ
Correct. PZ865 was up yesterday. Today was just 41 Squadron and a practice by the Dakota that wasn't broadcast on the DATIS.
Fake Sealion,
It was yesterday (21st). There was a broadcast for all aircraft to return. DATIS by about 15:30 local was broadcasting "No further take-offs"
TJ
I guess it all comes down to the bypass ratio - ie. how much goes down the core of the engine (the bit that does the "suck, squeeze, bang and blow").
Typhoon's Eurojet EJ200 has a 0.4:1 bypass ratio
Boeing 737's CFM-56 has a 5:1 to 6:1 bypass ratio (depending on the variant)
Tristar/B747's RB-211 has a 4:1 to 5:1 bypass ratio (depending on the variant)
Both can be damaged by contimination (such as sand, ice and ASH!), but the low-bypass-ratio EJ200 is far more likely to suffer damage over the high-bypass-ratio RB211 or CFM-56.
The F404s fitted to the F-18C/Ds of the Finnish Air Force (that were also damaged recently) has an even lower bypass-ratio of 0.34:1
So that's my opinion/theory.
B Word
Typhoon's Eurojet EJ200 has a 0.4:1 bypass ratio
Boeing 737's CFM-56 has a 5:1 to 6:1 bypass ratio (depending on the variant)
Tristar/B747's RB-211 has a 4:1 to 5:1 bypass ratio (depending on the variant)
Both can be damaged by contimination (such as sand, ice and ASH!), but the low-bypass-ratio EJ200 is far more likely to suffer damage over the high-bypass-ratio RB211 or CFM-56.
The F404s fitted to the F-18C/Ds of the Finnish Air Force (that were also damaged recently) has an even lower bypass-ratio of 0.34:1
So that's my opinion/theory.
B Word
Here's an interesting read... http://www.skybrary.aero/bookshelf/b...m_medium=email
It would seem to me that both our Military and Civilian regulators are completely unaware of its content - or they've given it a stiff ignoring!!!
The B Word
It would seem to me that both our Military and Civilian regulators are completely unaware of its content - or they've given it a stiff ignoring!!!
The B Word
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Apparently there was very little happening at Waddington today. From the grapevine in Town today, it wasn't just Typhoons that had issues with ash yesterday.
Last edited by dilly; 22nd Apr 2010 at 21:39.
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More political tampering ?
I csan't help thinking that this all has the look of damage limitation..........and not to jet engines!
Has the RAF been told to find as much ash damage as it can and then take drastic action? this would would be likely to take pressure off the govenment for the way they shut UK airspace last week.
I would like to take a look at the "ash damage" and compare is on a flying hour basis with what is found in the turbines when opperating from some of the sandy places that seem so popular with the RAF at the moment.
Only then would we be able to say if the RAF is being used as a political pawn in this election.
Has the RAF been told to find as much ash damage as it can and then take drastic action? this would would be likely to take pressure off the govenment for the way they shut UK airspace last week.
I would like to take a look at the "ash damage" and compare is on a flying hour basis with what is found in the turbines when opperating from some of the sandy places that seem so popular with the RAF at the moment.
Only then would we be able to say if the RAF is being used as a political pawn in this election.
For what it's worth, I tend to agree with B Word's bypass theory. I was mulling this over the other day and came to the same conclusion. Tucano engines have no bypass at all (as far as I know).
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From the ACO:
Seems like even winches operating at 0' are being affected.......
Urgent Announcement VGS & AEF FLYING
HQ Air Command has directed that all Cadet and Instructor flying on VGS and AEFs is cancelled over the weekend 24th and 25th April.
HQ Air Command has directed that all Cadet and Instructor flying on VGS and AEFs is cancelled over the weekend 24th and 25th April.
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Secret Lincs Base
All seems to have been very normal here today despite rumours. Plenty of 100LL burnt by various airframes and car alarms being set off by the avtur burners
For the VGS' it would appear that they couldn't think of anything so are saying it's because the pitot system has no filter on it for the Vikings...
Nuff said really, best flying weather in ages and someone in their ivory tower decides to stop the best advert for the RAF doing it's job...(Unpaid but that's another can of worms!!!).
Rant over, soap box dismantled, POETS!
OB
Nuff said really, best flying weather in ages and someone in their ivory tower decides to stop the best advert for the RAF doing it's job...(Unpaid but that's another can of worms!!!).
Rant over, soap box dismantled, POETS!
OB
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Anyone else think the headline in the latest Pravda (sorry, RAF News) is particularly amusing?
RAF News - ASH alert fails to ground RAF
RAF News - ASH alert fails to ground RAF