The F-35 Joint Program Office and Lockheed Martin have completed F-35 static, drop test, and durability testing and early results indicate a potential for an increased service life certification for the F-35A variant.

The company say that rigorous testing supports validation of the air frame’s strength and resilience to perform in the demanding environments it will experience throughout its operational lifetime and the final results will support fleet management and maintenance forecasting for decades of operations.

“The transformational F-35 pushes the boundaries of engineering and physics with supersonic speed, agility, high attitude and angle of attack, weapons capacity, vertical landings, carrier operations and much more,” said Greg Ulmer, Lockheed Martin’s vice president and general manager of the F-35 programme.

“Durability testing gives the men and women who fly the F-35 great confidence in the aircraft’s performance today and for decades to come.”

Ground testing includes a full scale durability airframe of all three variants, which were loaded in unique test rigs and laboratories to simulate ground and flight load conditions during fleet operations.

The F-35 service lifetime is 8,000 hours, and each test airframe is required to complete two life-times of testing, or 16,000 hours. The F-35A vastly exceeded the requirement by completing three full life times of testing, or a simulated 24,000 hours, which gives the programme confidence in a potential service-life increase.

“We look forward to analysing the results and bringing forward the data to potentially extend the aircraft’s lifetime certification even further,” said Ulmer.

“Already certified for one of the longest lifetimes of any fighter, an increase would greatly reduce future costs for all F-35 customers over several decades to come.”

The F-35A airframe completed its testing at BAE Systems in Brough in the UK and the F-35B and C variants were tested at Lockheed Martin in Fort Worth, Texas. All variants undergo final tear-down inspections at the National Institute for Aviation Research in Wichita, US.

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Please, please let the F-35B results also be good. We could do with some unexpected cost optimisations. Presumably in practice, if the F-35B results are similar, it would mean that some of the 138 over-the-total-lifetime-of-the-project aircraft planned for the UK could end up as extra frontline aircraft rather than being replacement purchases for worn-out older aircraft. Might that eke out another frontline squadron from the 138 total? The fear of course is that it could just as easily end up with HMG cutting the total buy on the basis that they could still form the same number of squadrons. In… Read more »

Daniele Mandelli

Morning Julian.

I cannot see us ordering more than an additional 48. Which gives 96 and enough to surge a Carrier and have a reduced number on the second.

Surging two Carriers with 36 F35 as some suggest I don’t think has ever been the plan.

Reducing the F35 order is an easy save for MoD.

And if British industry is building 15% of every aircraft built they are not losing much in not building parts of the 40 odd not ordered out of thousands.


(Chris H) Daniele – I am coming to that point of view as well. Not because I think the F-35B will not deliver as it will be a major asset for carrier strike and RAF roles for the next 20+ years but because by 2040 we will need a Typhoon replacement, we will be building ‘Tempest’ and this will negate the need for those extra 40 and will be better use of that £0.4 Bn or so. I believe there are also other future drivers here: The QE, being first of class, will be in for an earlier major refit… Read more »

Daniele Mandelli

Morning Chris. A Naval Tempest? That would be a fine thing indeed. Given HMG ability to bodge things rather than believing in ourselves with our own products over countless decades I will be happily amazed if that materialises! I’d have thought a navalised UAV more likely. I think the billions saved from reducing the F35 buy would be swallowed up reducing some of the deficit the MoD finds itself in in what it is committed to buy over the next decade to what money it thinks it will have ( thus the reason for the spun “MDP” ) which as… Read more »

Mr Bell

F35B costs: 40x £100 million each = £4 billion not £0.4 billion.

Mr Bell

£4 billion sounds a lot of money but actually for a country that gives £15 billion a year away on foreign aid is small change. What I am trying to say is we can easily afford 48 more F35Bs at least. You fight wars with weapons we have to hand. Not what you might get in the future, possibly, potentially. Look what happened to type 45 destroyer programme reduced to 6 hulls to doped up and advance the type 26 programme. The type 26 programme delayed, over budget and reduced to 8 ships to allow for type 31 programme. Knock… Read more »


(Chris H) Mr Bell – fair point on my maths … But I was not suggesting anything about what we fight a war with now, next year or in the next 20 years. I was looking ahead to 20135 and beyond when three major programmes come to a convenient hiatus. As Daniele suggests we really need to question buying F-35 beyond 96 anyway and I believe, given a) the speed of technology and aerospace advances, b) where QE will be in her life cycle and c) where Tempest let alone UAVs will be in 2035, that I agree with that… Read more »

Paul T

Julian- yes I’m afraid id agree with your second point,if F35 life could be extended HMG would see that as an opportunity to reduce the overall buy,being the pragmatist that I am.But as Daniele says another 48 would be just about sufficient to sustain operations for the two Carriers,in an ideal world id like to see the shortfall made up of another batch of Typhoons but I wouldn’t be confident of that happening either.

Nigel Collins

I found this link Julian which covers the testing of the F35B. Not sure if the source meets with everyone’s approval.


(Chris H) Nigel – Interesting that in the whole of the article no mention was made of the fact that the two F-35s (and A and a C) that had been stress tested to 3 times their expected service life of 8,000 hours were shipped toi that facility from here in the UK. Something that couldn’t actually be done in the USA as w have some of the most advanced airframe testing rigs and engineers in the world. This from 2009: And correct me if I am wrong but doesn’t your link article say that the F-35B testing was… Read more »

Nigel Collins

In reply to, “Please, please let the F-35B results also be good. We could do with some unexpected cost optimisations. Presumably in practice, if the F-35B results are similar, it would mean that some of the 138 over-the-total-lifetime-of-the-project aircraft planned for the UK could end up as extra frontline aircraft rather than being replacement purchases for worn-out older aircraft.” Not quite sure what exactly you’re getting at Chris? It’s not my article, and the testing on the F35B is still incomplete. What’s important to note are the costs involved to get the F35 up to Block 4 and the expected… Read more »

Nigel Collins

And just to repeat myself, Janes Defence March 2018 “The Pentagon is facing a major potential F-35 Block 4/C2D2 cost increase, This could add between USD6.9 billion and USD12.5 billion more to the Pentagon’s most expensive platform. The Pentagon is facing a cost increase for what was known as Block 4 modernisation of the Lockheed Martin F-35 Lightning II Joint Strike Fighter (JSF) ranging between USD6.9 billion and USD12.5 billion, according to a key lawmaker and a Defense Department official. Subcommittee Ranking Member Niki Tsongas of Massachusetts said the total cost for C2D2 could reach USD16.4 billion through FY 2024”… Read more »


(Chris H) Nigel – You quoted Julian not myself so I can’t comment further on that. However in my reply I was referring to the article to which you provided a link. All American bullcrap and not a mention of the key important facts that these very prescriptive, lengthy and accurate tests were carried out by BAE and a University here in the UK. Despite that inaccuracy I went along with it and used it to quote against your comment inferring the F-35B is flawed structurally. It isn’t as even a very early pre-production airframe was tested to exceed 2… Read more »


(Chris H) Nigel – Quote:
“And just to repeat myself”

No don’t. Please stop. Once again you are peddling irrelevant stuff because you have an agenda. We all understand that but keep to the topic? This is about structural testing not some distant software upgrade.

You even tried to deflect the conversation in your odd reply to my post about structural testing.

Nigel Collins

Interesting to note you find the testing and subsequent reports by the DOT&E JPO and the Pentagon bullcrap Chris?

As for the predicted costing on block 4 to give the F35 its full capabilities? I much prefer pointing out both sides of the coin, before we get drawn in any further with our limitless defense budget!


(Chris H) Nigel – nice deflection (again) but no I was calling bullcrap on the article to which you gave a link – ie “The Drive / The Warzone”. While the JPO was quoted later in the article it was not an article published BY the JPO. There is a difference.

And there you go again Nigel. You just cannot keep to the point and have to throw in other totally unrelated matters.

Colin Brooks

I do not see a long life for our naval F35B if it goes up against any Russian made 4th generation (or better) interceptors. I read a semi reliable US article saying that even the F22 should not be used against such opposition and that the US would use its own 4th gen fighters. F22 (like F35B) has a limited weapons load out if it wants to be stealthy.


Sorry Colin, but I must disagree. The F22 for example was primarily designed as an air dominance fighter that could super cruise (maintain supersonic speeds without using reheat) and make sustained turns whilst supersonic. This gives increased energy (range) to Air to Air missiles (AAM), but also enables the aircraft to minimize the time it is in the return fire zone. Because of the superior thrust to weight performance over say an F18 along with the vectoring exhaust nozzles still enables the aircraft to mix it with 4th gen aircraft. The aircraft employs different tactics to earlier 4th gen aircraft,… Read more »

Steve M

Like button required.

David Taylor

I am not sure whether Tempest should be built as STOVL only. I think technology may well over take the idea of a combat aeroplane before it leaves the CAD screen. If the F35x does have greater shelf it is a good thing then.


This is indeed great news – but I really dont agree with or see the need for reducing our order of F35’s from the 138 we have committed to. I would suggest we accelerate the puchase in fact and get an operational fleet of 128 or 8 good squadrons, with a minimum of 96 for the 2 carriers. In reality Tempest is a long way away and whilst I like it, I would really support us going all in on Taranis / Magma as this fills a need that every country in Europe has – something that is relatively inexpensive,… Read more »