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Would the F-35 new engine at block 4 update address the cooling issue?

TK3600 said:

Would the F-35 new engine at block 4 update address the cooling issue?

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Likely something they take into account, so it should have higher electricity generation or better generation (not needing to run as hot etc.).

siegecrossbow said:

It is a weasel word basically. F-35s are multirole fighters capable of aerial combat as well as precision strikes against naval targets. Let's say that one of the planes had some issues with mounting anti-ship missiles. Technically that's not fully mission capable. But that does not mean that the plane is incapable of carrying out missions! If we apply the same readiness criteria to other air forces then they'd be lucky to reach F-35 levels.

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The 53.1% is for Mission Capable aircrafts. For Fully Mission Capable aircrafts that figure drops to 29.3%.

Just 53.1% of the fighter fleet was found to be mission capable in February 2023, with 29.3 fully mission capable, according to prepared remarks [

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] delivered by Air Force Lt. Gen. Mike Schmidt, who heads the F-35 program.

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Overbom said:

The 53.1% is for Mission Capable aircrafts. For Fully Mission Capable aircrafts that figure drops to 29.3%.

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In that case it is problematic for a jet that has been in service for quite some time…

Navy Estimates 5 More Years for Virginia Attack Sub Production to Hit 2 Boats a Year​

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It will take five years for the two shipbuilders that build Virginia-class attack boats to deliver two submarines a year, according to the Navy’s latest estimates of the production schedule.

Three officials who have been briefed on the Navy’s estimates told USNI News that General Dynamics Electric Boat and HII’s Newport News Shipbuilding would put the program on a two-boat-per-year delivery schedule by 2028 with steady improvement in shipyard workforce recruitment and retention.

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The two yards are currently on a pace to deliver about 1.2 submarines a year, Navy officials told USNI News this week.

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“On the Virginia side of the house … they are significantly behind. They should be at two boats per year. … They have made some progress in moving in [the right] direction. I’m concerned particularly about the construction of the sterns and bows in Virginia and getting those up to Electric Boat up in Connecticut and integrating them all,” Secretary of the Navy Carlos Del Toro told the House Appropriations defense subcommittee this week.

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latenlazy said:

The F-35 needs more cooling capacity than they spec'd for the engine. Primary cooling capacity is supplied by the engines via a fixed diversion of bypass air. To provide the extra airflow for the necessary cooling capacity they need they've been running the engine harder which hurts its service life.

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This is correct. There's an interesting Twitter thread about it:


The moneyquote? "The engine has been underspecced since the beginning". Basically the much-vaunted "5th gen engine" is forced to run over its natural capacity because P&W couldn't produce one to spec.

mossen said:

This is correct. There's an interesting Twitter thread about it:

https://twitter.com/i/web/status/1641663470327177218

The moneyquote? "The engine has been underspecced since the beginning". Basically the much-vaunted "5th gen engine" is forced to run over its natural capacity because P&W couldn't produce one to spec.

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Shouldn't the government of other countries like Canada, South Korea, Japan, U.K. and now Germmany that have either purchased this fighter and will get them soon in the case of Germany get some kind of rebate? Or discount due to the fact that what they have been sold on isn't exactly what's been advertised considering the price tag on this fighter wunderkind aircraft?

One would assume that if there's an actual objective, critical FREE PRESS in those countries and governments that are actually working in the best interests of their respective countries that the opposition parties would be calling for the heads of their leaders for spending their FINITE money into something less than useful for the actual defense of their countries.

mossen said:

There's an interesting Twitter thread about it:

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Just read a comment in the replies saying something along the lines of "hey, at least we found out. I bet this is common in China and Russia and people don't know"

So much cope

Overbom said:

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Russia delivered three nuclear submarines in 2021. Two Borei-A and one Yasen-M. Two in 2022. One Project 09852 (Oscar II mod.) and one Borei-A. And that from a single shipyard.

gelgoog said:

Russia delivered three nuclear submarines in 2021. Two Borei-A and one Yasen-M. Two in 2022. One Project 09852 (Oscar II mod.) and one Borei-A. And that from a single shipyard.

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I might be wrong, but I believe before sequestration started I believe they were or were about to start building two subs per year. I don't remember the Virginia program having a lot of trouble with production back then, but I could be wrong.