The F-35B swivel nozzle in action during a night landing

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dreaminginteal@reddit

I helped bring this into the world... It was at a pretty advanced state of development by the time I was involved, but I did a little bit! I provided them with a display that showed in real time the thrust vectors from all nozzles (including the attitude control system ones) as well as all control surface positions. Or rather, that showed what those quantities were in our simulation of the aircraft.

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Dear_Ad4079@reddit

https://youtube.com/shorts/w5IdnOlaZAA?si=omRokh1NQCdoDAnt

How does it feel to see this as some of the product of your work? I work in a similar capacity and it's pretty haunting.

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ubuntuNinja@reddit

Don't you have anything better to do with your life? Harassing people isn't going to turn them to your cause.

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Dear_Ad4079@reddit

What cause is that? Where is the harassment?

It’s something that’s has been troubling me lately. Awareness is not a bad thing unless you prefer to keep your grass on the sand; that is your choice and has nothing to do with me.

I guess if you call not wanting neighborhoods blown to bits by the technology we (myself included) the cause then is that something you support?

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Lmao_touch_grass_bro@reddit

Lmao

Touch grass bro.

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dreaminginteal@reddit

r/UsernameChecksOut

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rhino_aus@reddit

Man's capacity for violence and cruelty is not a new invention. It would be unthinkable to try and assign blame to the person who invented gunpowder or the pointy stick. I know things I have designed have killed people, but they would still be dead even if I hadn't because intimately the State decided that they were to die, and the people decided who runs the State. I'd certainly rather the Ukrainians didn't have to use bow and arrow or large rocks to defend themselves.

I do what I do to ensure that the consequence for other nations choosing violence is so high as to be untenable; it's all of our job to ensure that we elect leaders who do not choose a path of aggression, and I am a part of that as well. I do not believe these things contradict.

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dreaminginteal@reddit

Oh, it's pretty easy, once you master the whole "complete denial" bit of double-think. After that, you have a lot of excuses you can tell yourself (e.g., it was only a small part, it was just control systems work, I was only helping visualize the stuff they already knew, nothing I did is directly in there). And once that fails, there's substance abuse...

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Dear_Ad4079@reddit

Lmfao. Check on all accounts. Happy to be sober now finally, but now what?

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Scarnhorst_2020@reddit

So, this might seem like a dumb question, but can the F-35B still use afterburner with the nozzle pointed down during landing/takeoff?

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ElkeKerman@reddit

I don’t think I realised it could hover with afterburner on

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ctesibius@reddit

I think this is infra-red, in which case the normal exhaust would show like this.

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ElkeKerman@reddit

But NV is near-infrared right, which isn't necessarily the same as thermal?

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ctesibius@reddit

Thermal emission spans a wide range of frequencies, up to and including visible - which is why you can see a candle or the reheated exhaust of a jet. So while this might not show the heat from someone's face, that doesn't mean it won't show something hotter. The hotter it is, the shorter the wavelengths of emission.

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ElkeKerman@reddit

https://www.twz.com/no-the-f-35b-does-not-use-afterburner-in-vertical-landing-mode

I found this article while looking up something else - I don't think I realised that there was any visible-light emission from non-afterburner exhaust!

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Sixshot_@reddit

Look at NVG footage of the Harrier landing, you'll see the same effect from the rear hot nozzles

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DionStabber@reddit

It doesn't use the afterburner hovering, it's just that it looks like that in this night vision camera.

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ElkeKerman@reddit

So are there Mach diamonds in normal engine exhaust?

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LordofSpheres@reddit

Mach diamonds will occur whenever there is supersonic exhaust that's overexpanded by the nozzle, so yes, actually. There's no need for afterburner. Afterburner just makes them readily visible to the naked eye.

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ElkeKerman@reddit

Ah cool - I don’t know why I was downvoted, I was genuinely curious whether that was the case!

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MrWoohoo@reddit

It really makes me wonder about the weight of the moving nozzle and the extra lift fan how that compares to an arresting hook. It seems like the hook a much lighter solution..

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Eric848448@reddit

The navy’s C variant uses an arresting hook. This is the USMC’s B variant, meant to land on much shorter ships.

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Virtual_Area8230@reddit

Now include the weight of the catapults, arrestor system, and flight deck that goes with that hook.

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Mighty_moose45@reddit

Basically the real answer is yes you are technically right but you would need a much larger boat for that to work and it’s a lot cheaper to have the plane be. VTOL/STOVL than to make the carrier twice as big. One costs millions more the other costs billions.

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cat_prophecy@reddit

Well aircraft that only have a hook can't takeoff or land vertically.

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elingeniero@reddit

The F35B is very compromised compared with the A and C. It basically only exists for political reasons. Cool tech, but ineffective.

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DionStabber@reddit

The hovering also burns an absolutely insane amount of a fuel to the point that they pretty much have to aerial refuel right after take off in a lot of cases.

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P-38Lighting@reddit

They usually use the VTOL for landing and not takeoff, the F-35B still has great STOL so it can operate from the amphibious assault ships / helicopter carriers using the small runway & still land in the small back part without taking up the limited deck space

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Xeelee1123@reddit (OP)

Source: https://youtu.be/FJqzF_k2u7Y

Source: https://www.f35.com/f35/news-and-features/Everything-You-Need-to-Know-about-the-F35B.html

Source: https://en.wikipedia.org/wiki/Lockheed_Martin_F-35_Lightning_II