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File 148661464663.jpg - (74.29KB , 960x587 , 6b0b5309e4e26f5806960783008c571b.jpg )
21552 No. 21552 ID: 8a2fe4 hide watch expand quickreply [Reply]
There doesn't appear to be a general motorcycle thread on the board, so here's one.

I'm strongly considering getting a motorcycle. It's not for the cool factor, but because they seem like extremely affordable, practical commuting vehicles. The only thing that would keep me from getting one is my local climate. Anybody here ride in the desert? What's it like wearing All The Gear, All The Time in the Mojave in August? How long can one ride when it's 106 degrees out before it becomes intolerable?
14 posts and 6 images omitted. Click Reply to view.
>> No. 21572 ID: e358f8
File 148720603515.jpg - (521.28KB , 1600x1200 , motorcycle Honda CB750 1981 Custom.jpg )
21572
My motorcycle in that crash was a 1978 Honda CB750 with a fairing, similar to this 1981 CB750 Custom.
http://www.operatorchan.org/v/res/1.html#14619
The old CB750s were really good bikes, back in the '70s & '80s, but I like the smaller bikes.
>> No. 21573 ID: e358f8
File 148720637672.jpg - (954.86KB , 2688x1520 , motorcycle Honda CB750 Four 1978 4 cylinder 1.jpg )
21573
>> No. 21582 ID: 8a2fe4
File 148763045984.jpg - (81.74KB , 588x350 , mini-bike.jpg )
21582
Motorcycles in the 250cc to 500cc range appeal to me. They're very cheap, even when brand new, and the MPG is phenomenal. Problem is I am 6'1". Using cycle-ergo.com (cool site, check it out), and plugging in my height and inseam for a Rebel 250 shows that I would feel not unlike a circus bear while riding one. I suppose ape hangers and highway bars would be one solution to let me stretch out, but are highway bars practical for commuting on surface streets? Something like a street legal dirtbike would get me higher off the ground and let me stretch my legs at stops.

Or just screw it and buy a big cruiser. Thoughts?
>> No. 21583 ID: 1d521e
>>21582

I'm 6' and 220 lbs. My first motorcycle was an 84 Honda CM250C. In 85 They rebadged it to the Rebel.

Yes, it felt like I was a circus bear most of the time. But I also rode that thing like it was a motogp bike. Great thing to learn on, even if uncomfortable for any longer than half an hour.

A Shadow wont necessarily be any better either, I upgraded to a 750 Shadow Aero, wound up still basically with a half hour time limit. I did ride it longer distances, a few 2 1/2 hour long highway rides, and it was miserable. Mini-apes would likely have fixed a lot of those issues, but I wound up trading it for a 400 horse Camaro before I could test that theory.

Shop around and sit on a bunch of bikes. I wound up sitting on a Suzuki Boulevard C50 and it was much more comfortable than what my Shadow had felt like. Yet it was also a good size for my girlfriend, so it's a bit of an interesting bike.
>> No. 21584 ID: e358f8
File 148763849363.jpg - (1.01MB , 2592x1944 , motorcycle Honda CBX1000 1.jpg )
21584
>>21582
I drove an old (1982?) Honda 250cc and had a problem with it breaking the wide rubber drive belts. Those things were expensive.
Picture is a Honda CBX-1000, a straight-six catastrophe-waiting-to-happen. But it's fast, fun, and looks great.


File 148458539871.jpg - (301.91KB , 1600x1105 , v30816_Jeep_J8__5_.jpg )
21500 No. 21500 ID: de867f hide watch expand quickreply [Reply]
I'm sure I've posted jeep comeback stories here before, but here's the latest rumour from warhistoryonline:

https://www.warhistoryonline.com/featured/u-s-military-may-bring-back-jeep.html

With the JLTV costing the expensive side of $400K per unit, it makes sense to have a cheap utility vehicle for rear echelon duties, so would a militarised Jeep Wrangler fit the bill?
44 posts and 20 images omitted. Click Reply to view.
>> No. 21577 ID: 9723b1
  BAE LAV
>> No. 21578 ID: 9723b1
  Northrop Grumman Hellhound
>> No. 21579 ID: d4c8ee
>>21574
>'Did you just open the page, see "Location: Polska", cry out "Russophobia!" and close it?'
>'yes'
>> No. 21580 ID: 45e3a1
  >>21578
that stow able weapons platform seems a bit awkward. Would be unpleasant if someone accidentally hit the switch with a squad crammed in the back. Still, it is interesting to see the effort they go through to make this fit as easily into an aircraft as possible, not a whole lot of vehicle will fit inside the CH-47. (although they have carried sling loaded humvees before) Not quite as tiny as the Boeing Phantom Badger tactical golfcart that will fit inside a V-22, barely.
>> No. 21581 ID: 9723b1
>>21580
I think outfitting the crew with 7.62 neato LMG and just punching some roof hatches would make way more sense.

>Boeing Phantom Badger tactical golfcart that will fit inside a V-22, barely.
>lets build 200 new transport aircraft!
>oh no we made them too small!
>lets build 5000 super small vehicles just on the off-chance that they have to be transported by our small aircraft!
Never understood this line of thinking, it puts the people who have to ride those vehicles into danger and it's probably more expensive in the long run. Why don't they just build 200 of bigger aircraft to fit the vehicles currently in use, then they don't need brand new tiny vehicles and can save money by using the old vehicles.

It seems like a backwards way of thinking (the vehicle being there to serve the transport aircraft instead of the other way around).


No. 21525 ID: e84115 hide watch quickreply [Reply]
  I wouldn't
>> No. 21539 ID: 6877b7
Hey serv: why not, next time you feel like starting a thread, just post whatever it is in here?


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.


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