Have you ever wondered how the P-8 Poseidon maritime patrol aircraft fleet deals with the corrosion caused by saltwater?
The information came to light after a written question was submitted in Parliament.
Kevan Jones, MP for North Durham, asked via a written Parliamentary question:
“To ask the Secretary of State for Defence, whether there is a dedicated saltwater washdown facility or capability at RAF Lossiemouth for the P-8 Poseidon maritime patrol aircraft.”
Jeremy Quin, Minister of State for the Ministry of Defence, replied:
“The Post-Flight Rinse Facility at RAF Lossiemouth for the Poseidon MRA1 uses fresh water to rinse salt spray from aircraft after completing the last flight of the day to prevent salt corrosion on the aircraft skin.
Additionally, separate facilities are available to provide a full external wash of the Poseidon aircraft as part of the standard maintenance regime for the aircraft.”
On their website, the Royal Air Force say that Boeing’s Poseidon MRA1 (P-8A) is a multi-role maritime patrol aircraft, equipped with sensors and weapons systems for anti-submarine warfare, as well as surveillance and search and rescue missions.
“The Poseidon’s comprehensive mission system features an APY-10 radar with modes for high-resolution mapping, an acoustic sensor system, including passive and multi-static sonobuoys, electro-optical/IR turret and electronic support measures (ESM). This equipment delivers comprehensive search and tracking capability, while the aircraft’s weapons system includes torpedoes for engaging sub-surface targets.”
The UK plans to operate a fleet of 9 of these aircraft, 5 have already been delivered.
Nip down to the Car Wash in Elgin’.
Must be boys on jankers that could give it a dhoby.
Yell at it.
Ermm, hang on, I know this one…… Wash It ? 🙄
UK should have purchased the Kawasaki P1 (much better maritime patrol aircraft to P8) and used as the basis for various airborne electronic platforms such as AWACs, Sentinel, and even future Joint Rivet type aircraft. Also would make a good bomber (arsenal ship) for permissible environment conflict zones like the Sahel, Afghanistan and even Iraq and Syria ( with standoff weapons).
This would also have helped entice the Japanese to become part of team Tempest. Over a 30 year period I project the Uk would have bought at least 2 dozen of these platforms. I don’t see the UK investing in the B737-8 (800) platform after the AWACs is delivered.
The Boeing platform is essentially obsolete before it was ordered. Now we have All these problem with th MAX derivative which was supposed to be the newest and greatest iteration of a 60 year old design.
How is the P-1 better? Specifics pls. Also what is the cost of a P-1 compared to the P-8? Btw, can the P-1 carry the advanced AESA radar under it’s belly like the US P-8s have?
Got to agree with @Branaboy on this. The P-1 was specifically designed as a ASW aircraft able to operate at low altitudes much like the Nimrod, which solves the dropping of stores issue the P-8 had to overcome.
It’s also equipped with a AESA radar that gives 360 deg coverage, which isn’t a under belly fit.
The only draw back is its cost, but, that’s more down to volume of sales, or rather lack of them. We locked at it post Nimrod but in the end chose the P-8.
Try ‘looked’ !!!
The P-8A has it own nose radar for general search (including periscope). True it does not have 360 coverage.
The AAS radar is for land warfare – distinguish tanks, trucks, bad guys in SUV etc.
Wasn’t implying that P-8 hasn’t got a good radar fit, or isn’t a capable aircraft, just that the P-1 is a specifically designed ASW Aircraft, so, doesnt have as many compromises/work around to function.
As you say in your other post. p-8 airframe is also used for Wedgetail, so commanality between assets.
Agreed that the 737 frame is a compromise. But even a dedicated designing the P-1 is a result of compromise.
The real asset in either design is the ability (how easy it is) to upgrade the electronic hardware as the frame ages.
When the MOD decided on the P-8A vs the P-1 one factor would be how often will the hardware and software gets updated. With the P-8A they will rely on the US Navy to foot the bill for the development work. I doubt the Japanese Navy will improve the P-1 as much or as often.
bt
Wouldn’t disagree with that, expect the cost of any upgrades will be significantly cheaper with the larger user base of the P-8, probably all had a role to play in the final selection of airframe.
Which dropping of stores issue are you referring to, if you don’t mind?
If it drops from high, the torpedo wont splash at a close enough distance to home in on the sub. Torpedo parachutes are just drogues or stabilisers to stop the thing tumbling in the air and to ensure the correct angle of water entry. They don’t slow the torpedo down at all .
To get around that the MK54 ( Mk50 front end on a Mk46 back end) has a Longshot winged glider kit attached to it so that it can fly the torpedo to a gps coordinate to release the torpedo at low altitude.Great idea and it will save fatigue on P8 airframes as they don’t need to get low to drop a torpedo.
However the Mk54 is carp. The Mk 46 which makes up the the Mk54’s back end propulsion bit, was replaced in the UK by Sting Ray because the MK46 was to slow and couldn’t catch or sink a fast deep diving titanium/twin hull nuclear sub. We have now gone back in time 35+ years and are about to reintroduce an Oto Fueled torpedo that has serious operational capability shortcomings.
Sting Ray needs to be integrated ASAP to the Longshot kit.
MK-54 is crap indeed. I know a thing or two about it which i cannot repeat here as I’m not sure it’s public knowledge. But take it from me, it’s crap. We were forced into buying it because of the Longshot kit. Also question marks about P-8 radar. Very good radar no doubt, but has no 360 coverage and however good it might be (special modes), projecting on the sea surface at a high angle of incidence will make it more problematic detecting small periscopes at shorter ranges. It’s simple physics. Also not sure whether we can use UK stock of excellent sonobuoys (best multi static technology in the world). Doubt they are compatible with P8’s sonics processing system. Will we be forced again to buy inferior American kit? Can anyone enlighten me on that? Cheers
Hi Richard,
There have been many comments on here about the MK54 and none of them positive in the slightest. Your comments regarding the P8 also suggest that much of the UK’s top end ASW kit is not compatible with the off the shelf P8.
Whilst having the P8 is a big improvement on nothing I think that arguement has been used behind closed doors to cuts integration costs. The worry I have is that the next step will be to forgo our sono buoy tech and torpedoes in favour of cheaper US systems.
On the plus side we have at least started pre-concept work on a new lightweight torpedo which might yet get integrated into the P8, hopefully, this will be as part of a midlife update on the aircraft which would see UK systems usefully integrated into the platform.
This demonstrates that buying off the shelf does not always get you what you want, even if it gets you something quickly and far more cost effectively. I think the P8 procurement was a quick win purchase, hopefully, we will do a comprehensive mid-life upgrade.
The P8 / MK54 are better than nothing, but I do hope they are an initial capability.
Cheers CR
Wasn’t the idea to start off with US kit to get them up and running and then eventually switch to our own torpedos and sonobuoys?
I’d guess that got canned for budget reasons.
If the UK torpedoes will fit into the P-8A bomb bay, it could be easily handled by the stores management computer. Whether it could be dropped at high altitude is a different matter.
Integration UK hardware into the P-1 would cost as much.
Again flying at low altitude is is a double edge sword. You only fly low to take a closer look or to drop torpedoes or sonorous. Most of the time you are searching at medium altitude in order to have a larger radar search radius.
If you do not have to drop down low to release your ordinance or sonobouy, then you save all that energy trying to gain that altitude again.
bt
I believe the radar being referred to here is the AN/APS-154. It’s one of the usn most jealously guarded assets and up to now it seems almost certain that they will not sell to any other country.
Hi Gunbuster,
I do not think that the Sting Ray will ever be intergrated onto the P8. Like you I thought this was a foolish mistake especially given the development of the Mod 1 which is now underway.
However, it seems that the UK is going to develop the Future Lightweight Torpedo. It was in its pre-concept phase in 2019 / 20 and there are a number BAE Systems pictures of a mockup of the weapon, but no more detail as yet. So we will probably be stuck with the MK54 until I would think / hope the new torpedo comes along and is integrated with the P8, madness if not.
Cheers CR
Thank you for the explanation GB
The wings on the P8 are high altitude optimised (ie airliner wings with a swept leading and training edge).
The P1 has higher are wings optimised to be able to fly low and slow (swept leading edge, straight trailing edge, with higher area allowing better maneuverability). Thus allowing conventional tactics and delivery of ordanance.
The P8 required new tactics & delivery systems because of the wings.
The P1 is also a 4 engine design that allows for idling 2 engines to increase loiter time, unlike the P8
The P1 also has a magnetometer integrated for sub hunting because it can flow low/slow. The P8 doesn’t as it flies high.
The magnetometer is an option on the P-8A which the US Navy chose not to buy as the US Navy believe their acoustic sensor works better against titanium hull subs anyway.
The India chose to include the magnetometer as can be seen on their P-8I’s.
@GB beat me to it. As he points out they have it sorted now. The P-1 not being based on a civil airliner, and having a ‘thicker wing’ is able to operate at low altitudes where the air is denser, so can release it’s weapons at a much lower altitude.
Jet engines flying at low altitudes aren’t really detected by SMs unless almost ‘on top’, so they have a small advantage over helicopters or prop driven ASW aircraft.
Like dan said, the P-8A is already be able to carry the AAS radar that is developed to take up the Rivet Joint mission. How much would it cost to develop the same for the P-1?
The P-8A has two engines, that leave room on the wing for additional weapons to the ones that can be fitted in the bomb bay. With the P-8A you will have access to US Navy arsenal. With the P-1, not so much.
Just because the P-8A operates better at altitude, it does not mean it can not drop to 200 ft to do a visual. They do this all the time when rescuing stranded sailors.
Oh also, the 737 platform will be common with the 3 Wedgetail frame the UK is buying
Back when we were still flying Wasps from frigates it was a heck of a lot of WD40. Much of the structure was aluminium and magnesium alloys, the flight always joked that if it got too salty you could hear it fizzing.
in reply to Branaboy, you are so right. But that would have required a huge amount of long term thinking from the MOD and the politicos, and we all know how good they are at that.
Wash it in freshers, do a comp wash and spray PX 24 everywhere.
How low does the p8 operate? Surly as it’s just a commercial airliner with a few senors fitted and a bomb bay it would not operate as such low level as to come into close contact with sea spray so dads karacher to give it a wash down should suffice?
That’s what I was thinking. I understand you may get salt water suspended in air above the ocean up to x meters or whatever but I wouldn’t have thought it would need special facilities. Live and learn
I believe their Ski’s kick up a fair amount of Salty stuff every time they take off and land…… Another reason why we should have had Cat’s and Traps…….
How would that help the P8s?
If I knew what “Senors and Karachers” were, I guess I’d agree mate….. 😂
9 P8’s still aren’t enough for a credible ASW capability. At least 20 aircraft required.
Hi JJ, kind of related, there’s a lot of P8 assets in Lossiemouth in what looks like one humungous shed…so I hope this busy airfield has top notch Sky Sabre protecting it! If they did expand the fleet I wonder if they would locate another 3-6+ P8s somewhere else in the UK as you wouldn’t want all your AEW/ASW eggs in the one airfield basket! Would you? I’m happy to hear different opinions on this.
Suspect the Norwegian P8s’ and Crews will be using the facilities at the shed’. A joint use’ shed ?
The “Shed end” ? LOL. That facility is some shed!
And a bloody big target! Lol.
Could start re-using St Mawgan to cover the SW Approaches
“has top notch Sky Sabre protecting it!”
Not that I’m aware of. The RAF Regiment got rid of their SAM capability years ago and British Army use of Rapier FSC, and Sky Sabre, as far as I’m aware is for use on the battlefield, not static defending UK installations.
That is kind of suggesting that there is no SAM defence of any UK air bases happening then? Isn’t that a huge risk even in peace time? Not that a “Pearl Harbour” type attack could happen again but a surprise attack by any forces especially with sub launched cruise missiles could. I find it hard to believe the RAF has no SAMs and is there such a thing as a RN equivalent? The RN Naval bases should have some fall back SAM ability. It’s worse case scenario and others have mentioned it before, considering we have the huge RAF Fylingdales BM radar station we appear to no medium to long range SAM defence at all across the whole of the UK – isn’t this a huge exposure? I wonder if there’s any reason for it, besides costing too much money? Isn’t complementary and tiered defence systems the way to go? Against a possible missile or drone attack that the UKs only got Sky Sabre (only currently 28 units being built?), some StarStreak and that’s it besides aircraft. Are there any feasibility studies for truck or container based Aster30+/ Camm-ER being considered? Does the Defence Minister ever bring this up – because I don’t see it anywhere? We might have to touch base with the RUSI to get this on their agenda?
Hi Quentin
“That is kind of suggesting that there is no SAM defence of any UK air bases happening then”
Not on a permanent basis. 16 Regiment RA could in theory deploy anywhere but their main role is on the battlefield with the regular army. As an example elements of the air defence group are in Cornwall now.
“I find it hard to believe the RAF has no SAMs and is there such a thing as a RN equivalent?”
In the Cold War there were squadrons of Bloodhounds arrayed along the east coast, I think 4 squadrons of RAF Regiment with Rapier defending USAF installations, and another 2 RAF Reg Rapier squadrons in Scotland, at Leuchars and Lossimouth. With the end of the Cold War all have been removed, and today the RAF Regiment is in a Force Protection role, that is ground defence, not SAM.
RN SAM’s are on Frigates and Destroyers, while the RM have a troop of Starstreak.
“considering we have the huge RAF Fylingdales BM radar station we appear to no medium to long range SAM defence at all across the whole of the UK “
RAF Fylingdales has nothing to do with SAM defence against aircraft. It is there along with the other US BMEWS for early warning and space object tracking. I believe some specific US infrastructure there ( and at Menwith ) is involved in BM defence and their Interceptor missile system.
“I wonder if there’s any reason for it, besides costing too much money?”
I guess one reason is money and more importantly there was no real threat post cold war justifying it. If that threat returns it could be looked at but something goes to pay for it. We have an expeditionary posture.
I’m not against the idea at all, I know other nations have Patriot and I would welcome it.
One could list literally dozens of critical defence infrastructure across the UK with no SAM defence at all. Russia has such a system, but Russia has to have one with the might of the US bomber fleet threatening it from any direction and a vast area to cover.
Be interested in the corrosion to the F35 on the aircraft carriers. The Navy plains purchased/transferred by the RAF off Arc Royal were corroded to hell and had to be rebuilt.
planes
Note that Martin Baker (UK) have been proving the mission seats for most if not all P-8 (A and I) delivered.
Do they have a similar system on board the new carriers for the F35 fleet while at sea ?
I seem to remember the aircraft wash was stopped at Kinloss as it reactivated the salt that was already on the airframe, where it then sat and rotted the metal without the benefit of a good airflow. We didn’t have a wash at St Mawgan.