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File 148458655143.jpg - (138.36KB , 960x640 , oshkosh-jltv-1.jpg )
21501 No. 21501 ID: de867f hide watch quickreply [Reply]
And while we're on the subject...
JLTV thread!
https://oshkoshdefense.com/jltv/
To me, this vehicle has a certain resemblance to the International Navistar MXT-MV Husky used by the British army, in that it follows a pick-up truck layout with a MRAP body. Which rather makes me wonder why the MXT wasn't a contender for the JLTV contract?
>> No. 21530 ID: ad2b13
It suffers from the same problem all multiroles suffer, which is lack of efficiency. And as the other thread is being discussed, it also leaves a gap in low-intensity general work that makes every military functional.

Other than that it's an ok vehicle, considering it replaces humvees juryrigged with extra armor.

>Which rather makes me wonder why the MXT wasn't a contender for the JLTV contract?
Other way around, I think the British are going to buy the JLTV.


No. 21496 ID: f11f4d hide watch quickreply [Reply]
  >2:13
This is what the future you chose sounds like.


File 147284605250.jpg - (2.20MB , 3872x1816 , Antonov_An-225_front_left_view.jpg )
21255 No. 21255 ID: d4c8ee hide watch expand quickreply [Reply]
https://www.flightglobal.com/news/articles/an-225-revival-proposed-in-new-antonov-china-pact-428949/

>Ukrainian aircraft designer Antonov has agreed to cooperate with a Hong Kong-based Chinese company, intending first to revive production of a partially-assembled An-225 freighter and then restore the series production.

>The agreement with Airspace Corporation of China signed on 30 August breathes life into the Soviet-era manufacturing programme for the world’s largest aircraft, which has remained dormant for 22 years.

>In the late-1980s, Antonov completed the first six-engined An-225 by stretching the fuselage of the four-engined An-124, lengthening the wing and adding a split tail. The aircraft was designed to carry a payload up to 225,000kg payload either internally or externally. In particular, the An-225 was needed to carry the Buran, the Soviet space shuttle.

>The collapse of the Soviet Union led to the cancellation of the space shuttle programme. The first An-225 was moved into storage for several years, while a second An-225, which is designed with a single, straight tail, was left uncompleted inside Antonov’s factory complex in Kiev.

>The new agreement begins discussions to allow Airspace Corporation of China and Antonov to resume assembly of the second An-225 in phase one. A follow-on second phase would restart series production of the heavy airlifter in China under license, Antonov says. Both phases would be initiated after the signing of separate contracts.
3 posts omitted. Click Reply to view.
>> No. 21264 ID: 7e827c
>>21255
I worked at an airport for UPS and got to see one of these in person. I wish I got to see it closer, but it was mind-bendingly large.
>> No. 21482 ID: bb86e7
I got to see a An-124 in flight, (donor design for the 225) and that thing was so large it seemed to just hang there in the sky while on landing approach.
>> No. 21483 ID: bb86e7
What the heck do they plan on hauling that makes this necessary instead of something smaller?
>> No. 21485 ID: cca113
>>21483
The existing one gets used a lot for outsize cargo (and occasionally as a flying RO/RO ferry, from what I'm seeing on Google Images). A lot of it tends to be industrial parts, especially power-generating equipment like gas turbines and transformers, to places where land/sea transport would be impossible or prohibitively expensive.
>> No. 21489 ID: d4c8ee
File 148356990231.jpg - (69.02KB , 541x415 , Axum_obelisk_returned_to_Ethiopia_4976789.jpg )
21489
>>21485
Also sometimes you need to move around a ancient Ethiopian obelisk.


No. 20698 ID: 9dcda2 hide watch quickreply [Reply]
  > reading blogs
> see mention of adaptive cycle jet engine
> interest piqued
> see video
> boner status: operational

Bypass ratio is the biggest trade off with engines. This is going to be huge.
>> No. 20699 ID: 9dcda2
  >>20698
Game changer. If I were the .mil, I would be asking for retrofits to existing jets.
>> No. 20701 ID: d4c8ee
>>20699
"But you've already got a desert full of perfectly good TF33s!" -Congress
>> No. 21479 ID: bb86e7
Second Video does not work.

So variable bypass ratio for fuel savings, plus an extra airstream for active cooling of avionics and such instead of dumping it into the fuel, requiring fuel to be temperature managed BEFORE IT EVEN GETS INTO THE AIRCRAFT! (Looking at You F-35) Looks good to me.

In the first video, I strongly suspect that this is not the actual variable bypass geometry, since it involves two nearly right angle turns for the supplemental air.
>> No. 21487 ID: c01ca7
File 148347456569.jpg - (100.23KB , 640x640 , sphagetti.jpg )
21487
>>21479
>requiring fuel to be temperature managed BEFORE IT EVEN GETS INTO THE AIRCRAFT!
One way we were told to do this is by painting our trucks white in the summer. Works well enough at a stateside base, however when you get into locales where you don't want to stand out and it's hot as fuck...
>> No. 21488 ID: bb86e7
>>21487
I knew about this, but the necessity for the aircraft smacks of bad design imho.


File 146639950187.jpg - (0.98MB , 2203x2938 , u4fK3xp.jpg )
20709 No. 20709 ID: f49edb hide watch expand quickreply [Reply]
Blowouts, man.
1 post omitted. Click Reply to view.
>> No. 21042 ID: f87148
File 146670327473.jpg - (9.22KB , 275x183 , orangutan_oh_sht.jpg )
21042
>>21040

Cleanup on aisle C5!
>> No. 21170 ID: 699348
File 147011871838.jpg - (29.15KB , 600x400 , confusion.jpg )
21170
>>21042
I wasn't MX and i'm not especially technically inclined when it comes to airplanes but my understanding was that after this shit happened they were cleaning the guy out of some surrounding AGE equip.
>> No. 21171 ID: 6ccdcf
>>21040
>>21170

My grandfather told me his most traumatic moment while he was in Vietnam was when he watched his best friend die under very similar circumstances. They were doing some maintenance around a tire of a plane (can't remember what) and he leaned on it. The moment he did that, there was a massive blowout and his buddy instantly died.

My grandfather normally cried when he told that story.
>> No. 21279 ID: f87148
File 14735902749.gif - (940.80KB , 250x197 , star_trek_horror_console.gif )
21279
>>21170
>>21171

Jesus. Hey, if ever they bring back the draft, remind me to test well enough I don't get assigned to ground crew / AvMech. I think I'd much rather get shot, stabbed, or blown up by incoming arty than killed by something so mundane as a fuckin' tire.
>> No. 21484 ID: bb86e7
Shit sucks yo. Hit a bump that was there due to construction on the interstate @~65MPH. Good thing it was one of the rear ones, so only 20% of the weight was on that corner, and steering was unaffected, and was only a medium size puncture, so it just started getting progressively bumpier. I knew what had happened instantly, and let off the gas, but unobservant assholes did not let me pull off from the Leftmost of 4 lanes until it started to smoke. Then it started to rain when I was switching to the spare.

I heard there was a rule of thumb that ground pressure PSI is approximately equal to that that of the PSI in the tire. Any truth to this?

>>21279
Stay out of ground mechanics also, just look at some of the bus and truck tire explosion videos.

I heard there was a rule of thumb that ground pressure PSI is approximately equal to that that of the PSI in the tire. Any truth to this?


No. 21228 ID: d4c8ee hide watch quickreply [Reply]
  Hello airplanes? It's blimps, you win.
>> No. 21229 ID: 8effed
  Airship Carvanning - Now in Full HD - Top Gear - Series 14 - BBC https://youtu.be/hGSqq6R5hm8
James's airship caravanning adventure hits the rocks as he drifts into Norwich airport's airspace while Richard, unsure of which caravan park James will actually end up in, undertakes a tour of the South East in the Lamborghini Gallardo! First uploaded 18/05/2010
>> No. 21233 ID: fd0828
Like some people want to retire to a yacht, I've wanted to retire to a solar-powered airship since before I entered the workforce.

I've been following Aeroscraft, SkyCat, Walrus HULA, HAV and all of the other players in the semi-rigid or rigid airship game for a long time now. I feel with modern meteorology, modern materials and other modern technology, we could make safe airships using hydrogen instead of less-buoyant, more expensive helium like everyone wants to use. The ignorant and semi-informed layman still misunderstands the Hindenburg disaster nigh on 80 years later because nobody feels any compulsion to look closer into it. There are low-hanging fruit to be grabbed in demonizing it and it was done by the Nazis so why pursue it?
>> No. 21235 ID: d4c8ee
  >>21233
Okay so how do you propose getting around the "strong wind/rainstorm can destroy the vehicle, and it can't outrun them" issue?
>> No. 21239 ID: 9723b1
>>21233
Is there some mass brainwashing effect going on? I've heard six other people say airships are their retirement dream in the past week.

I think someone paid OP vid to enter everyones youtube feed, and they loaded it with some MK Ultra shit.

>>21235
Modern engines are a lot stronger than 1870s ones, airships can definitely power through storms. The only downside is that there would be more movement, kind of like a boat on a sea.

They can also outrun almost any storm, rise above a storm in some cases, or land and tie down before it hits. Losing an airship is more likely on the ground where the hangar roof might cave in.
>> No. 21481 ID: bb86e7
>>21228
Needs better pitch control or stability.

>>21229
He should have brought an anchor with bungee cord. That way he could have landed facing into the wind, and then not gotten dragged along. The reason he did not do so here, I think, is that he would have been tangled up into the envelope had he been dragged downwind when facing into the wind. I need to watch the full episode at some point.

I think the basic concept is sound, it just needs to be implemented properly; but the lack of time, budget, and engineering ability is what results in such enjoyable to watch shenanigans and failures that made that show so fun.

>>21233
Agreed.

Is the short of it that the Doping on the Hindenburg outer skin was extremely flammable?

There is a science fiction book by Dean Ing, "The Big Lifters" where in one of the subplots the protagonists developed a ground laser boosted (for altitude boosts over the mountains) airship system that could pick up and drop off multimodal freight containers from trains. His goal was to get big rig long haul 18 wheelers off the roads. I think you might enjoy it.

Message too long. Click here to view the full text.


File 146547055617.jpg - (3.28MB , 3712x2088 , P1000686.jpg )
20667 No. 20667 ID: 87888c hide watch expand quickreply [Reply]
http://www.dailymail.co.uk/news/article-3629306/Royal-Navy-s-advanced-destroyers-break-Gulf-water-WARM-bungling-defence-chiefs-admit.html#ixzz4B1jexG4h

Really, guys? This isn't a Clyde ferry that's going to spend its life in nice cool water; this is a globally deployable ship that should be expected to spend time "east of Suez". Sufficient cooling capacity should have been built in.
22 posts and 13 images omitted. Click Reply to view.
>> No. 20726 ID: 4cec2f
>>20667
apparently the MOD *forgot* to specify warm water operations to RR.

Unfortunately Britain props up BAe and RR as "domestic industries".
>> No. 21028 ID: f86534
>>20726
Those companies would be replaced by tons better ones the moment the monopoly was over. Just like Oshkosh raped AMG.
>> No. 21045 ID: 385f49
  >>20686
Rocked pods, especially for aircraft, have shitty aim even for the the initial purpose (they are designed that way to provide wide cone for maximum effectiveness). But on the ground, when they are starting without initial speed, they have even shittier aim then that, because more speed provides more stability for the rocket. I.e., the range of this firework contraption is probably below 300 meters compared to 1000+ for normal firing mode from plane.

In effect, this kind of "weapon" is only suitable for terror tactics like shelling populated areas or diversion tactics.

>>20695
>And last of all, if a Fuel-Air bomb doesn't explode at all, the ethylene oxide fuel simply disperses in the air as an aerosol, acting as a chemical weapon.
Interestingly enough, these kind of weapons can also be used for burning out chemical weapons - it's not like it's 100% effective, but better then nothing.
>> No. 21046 ID: 9723b1
File 146678773665.jpg - (107.70KB , 740x367 , CRV7-PG.jpg )
21046
>>21045
>more speed provides more stability for the rocket
This is because the rockets are launched smoothbore, then small fins pop out to spin the rocket in flight and give it some gyroscopic stability. The problem here is that during the initial period before the rocket is spun fully, the fins only produce WOBBLING in the air, which greatly harms accuracy.

tl;dr fin limitations cause rockets to suffer a lot from accuracy problems.

One way to cut on the wobble is to increase the speed of the aircraft, which shortens the period during which the rocket isn't spinning. But the REAL solution is to do what the Canadians did, internalize the fins into the rocket exhaust, which completely removes the wobble problem.
https://en.wikipedia.org/wiki/CRV7
>Unguided rockets are normally spin stabilized, like a rifle bullet. The spin is imparted by small fins at the rear of the rocket body that flip out into the airstream once the rocket leaves its launch tube. The fins take a short time to open, and more time to start the rocket spinning. During this period the rockets can drift significantly from their original aim point. The CRV7 solved this problem by adding small vanes projecting into the rocket exhaust to start the rocket spinning even before it left the launch tube, greatly increasing accuracy. A salvo of CRV7's will impact the target area in one-third the footprint of older designs.

The CRV7 is the most accurate unguided aircraft rocket in the world.
>The weapon was originally quoted to have a dispersion of 4 milliradians, but testing with the CF-18 Hornet demonstrated it was even lower, at 3 milliradians.[4] This is considerably better than the autocannon that arm most aircraft; the widely used M61 Vulcan is rated at 8 milliradians, while the much larger and considerably heavier GAU-8 is rated at 5 milliradians.[5]

A CRV7 is just as accurate when launched from a ground vehicle, pic related it's actually as accurate as a 105mm light gun.
>> No. 21480 ID: bb86e7
>>21046
Interesting. I did not know that any kinetic energy armor piercing air launched rocket munition had gotten this far in development. To be fair though, they did do the initial development by accident.


File 146086043584.jpg - (107.33KB , 1280x960 , 47614788d1192681925-anyone-replace-their-stock-gau.jpg )
20463 No. 20463 ID: 490e84 hide watch expand quickreply [Reply]
Digital dash thread.
8 posts and 8 images omitted. Click Reply to view.
>> No. 20472 ID: 490e84
File 14608611526.jpg - (724.42KB , 2592x1509 , Vfd_car.jpg )
20472
>> No. 20473 ID: 490e84
File 146086123582.jpg - (102.39KB , 970x545 , 1361864561_1gai23.jpg )
20473
>> No. 20477 ID: cd5ece
File 146100636335.png - (205.02KB , 598x300 , honda-s2000-instrument-cluster.png )
20477
>>20463
The S2000's instruments are bretty gud. (Though the handling sucks.)
>> No. 20478 ID: de0bec
File 146105215575.jpg - (232.22KB , 1500x643 , GE digital alarm clock.jpg )
20478
I always loved vacuum fluorescent displays, and am especially fond of amber.
Sure, vfd's have fading problems, and often had terrible contrast between lit and unlit cells, but they look so damn cool.
>> No. 21478 ID: bb86e7
I think Car interface designers should learn from aircraft layout. I WANT to know specifically what my coolant, oil, and transmission temperature are doing (among other things), and there can be situations where I NEED to know these things. Also that switches need tactile feedback, and frequently needed or important controls should be placed in easy to get to places.

IF WE ARE SUPPOSED TO USE THE PARKING BRAKE WHY IS IT A PEDAL HIDDEN UNDER THE DASH that I have to LEAN FORWARD to DISENGAGE! PARKING BRAKES HAVE OTHER USES THAT ARE NEGATED BY STUPID PUSHBUTTONS and binary mechanical operation! As far as parking brakes, Honda seems to be doing things correctly for the most part.


File 140366584662.jpg - (639.26KB , 1600x1200 , 1985_cadillac_seville-pic-8066500241579754209.jpg )
16755 No. 16755 ID: 8ef743 hide watch expand quickreply [Reply] [First 100 posts] [Last 50 posts]
Why do older American luxury cars always remind me of open-casket funerals?
141 posts and 137 images omitted. Click Reply to view.
>> No. 20611 ID: d486ec
File 146276784130.jpg - (1.57MB , 2048x1536 , car, Cadillac Le Mans Concept Car 1953 5.jpg )
20611
>> No. 20612 ID: d486ec
File 146276792753.jpg - (747.33KB , 2048x1536 , car, Cadillac Le Mans Concept Car 1953 6.jpg )
20612
>> No. 20613 ID: d486ec
File 146276803850.jpg - (357.45KB , 1600x1200 , car, Chevrolet Impala Hardtop Coupe 1960 1.jpg )
20613
1960 Chevrolet Impala Hardtop Coupe
>> No. 20614 ID: d486ec
File 14627680732.jpg - (332.68KB , 1600x1200 , car, Chevrolet Impala Hardtop Coupe 1960 interior .jpg )
20614
>> No. 21477 ID: bb86e7
>>16755
Roomy, lots of padding, thick steel, ostentatious styling.


File 145685621482.jpg - (290.85KB , 2200x1650 , us-air-force-northrop-grumman-corp-long-range-bomb.jpg )
19979 No. 19979 ID: 7c90e8 hide watch expand quickreply [Reply] [Last 50 posts]
http://time.com/4241339/air-force-b21-long-range-strike-bomber-name/

It's about two times smaller, but it's about a third cheaper and hundreds of it will be built.
50 posts and 20 images omitted. Click Reply to view.
>> No. 20266 ID: 82edf9
  How It's Made Boomerangs https://youtu.be/zl10s5xe2-4
>> No. 20267 ID: 82edf9
File 145875031093.jpg - (1.55MB , 3498x2453 , CC club boomerang Australian 3.jpg )
20267
>> No. 20268 ID: 82edf9
File 145875033349.jpg - (218.63KB , 5184x2556 , CC club boomerang Australian 4.jpg )
20268
>> No. 21475 ID: bb86e7
>>20038
Another reason the B-2, F-117 and such have dorsal intakes is that the intakes form a cavity that makes a good radar reflector. This can be combated with baffles, RAM, or a sinuous shaped intake as in the B-1B, but clearly, from looking at what has been actually put into practice, it is better to put intakes on top in addition to this. It is likely that the B2 and F117 do have some stealth oriented shape to their intakes as they have auxiliary intake doors that open for takeoff. Paging Bat Guano for pics.
>> No. 21476 ID: bb86e7
B-21 Raider is what was decided:
http://www.military.com/daily-news/2016/09/19/air-force-unveils-name-of-future-b21-bomber-as-tk.html


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