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Scolopax reacted to Collimatrix in Aerospace and Ordnance discussion/news.
I don't know which is stranger, that there's a youtube video of a sock puppet explaining the difference between air to air missiles... or that it's actually pretty good:
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Scolopax reacted to Molota_477 in Models and pictures of Soviet MBT designs from 80s. Object 477A, Object 490 Buntar and Object 299.
The structure is what I mean. Alex02 made its gif and had post in Paralay Forum.
It looks so great.
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Scolopax got a reaction from LoooSeR in The interesting ship photos/art thread.
Watering the grass on the USS Nimitz
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Scolopax got a reaction from Belesarius in The interesting ship photos/art thread.
Watering the grass on the USS Nimitz
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Scolopax reacted to Collimatrix in Aerospace Pictures and Art Thread
Russian air-to-air missile size comparison chart:
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Scolopax reacted to Sturgeon in In Which Britain Tells Europe to "Stuff It"; Also David Cameron Takes His Football and Goes Home
4chan is responsible for second referendum petition, more lulz generated than ever before in the past two years: http://heatst.com/uk/exclusive-brexit-2nd-referendum-petition-a-4-chan-prank-bbc-report-it-as-real/
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Scolopax got a reaction from LostCosmonaut in In Which Britain Tells Europe to "Stuff It"; Also David Cameron Takes His Football and Goes Home
Moar
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Scolopax reacted to EnsignExpendable in In Which Britain Tells Europe to "Stuff It"; Also David Cameron Takes His Football and Goes Home
Am I doing this right?
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Scolopax got a reaction from EnsignExpendable in In Which Britain Tells Europe to "Stuff It"; Also David Cameron Takes His Football and Goes Home
Moar
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Scolopax got a reaction from Sturgeon in In Which Britain Tells Europe to "Stuff It"; Also David Cameron Takes His Football and Goes Home
Moar
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Scolopax reacted to LoooSeR in StuG III Thread (and also other German vehicles I guess)
What is that?
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Scolopax reacted to Sturgeon in In Which Britain Tells Europe to "Stuff It"; Also David Cameron Takes His Football and Goes Home
Better get Remainers some Preparation H:
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Scolopax reacted to xthetenth in Wargame Thread
If ever there was a time to turn off the game chat that isn't literally all the time, it's now.
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Scolopax reacted to T___A in In Which Britain Tells Europe to "Stuff It"; Also David Cameron Takes His Football and Goes Home
Someone order a dank meme:
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Scolopax reacted to Molota_477 in Vehicles of the PLA: Now with refreshing new topic title!
type 89 td's head on type 69's body
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Scolopax got a reaction from Jeeps_Guns_Tanks in The M4 Sherman Tank Epic Information Thread.. (work in progress)
I'm wondering if it may be photoshopped. Not finding anything on any M4A1 Shermans being given such paint jobs or exterior audio enhancements. Something something Kelly's Heroes.
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Scolopax reacted to Collimatrix in What the Hell is the Point of Interleaved Road Wheels?
Centurion had the good luck to be crewed by generally competent crews and sent against enemies who were generally incompetent. The IDF's prowess at tanking hardly needs reiteration at this point, and the Indian Army's opponents were, shall we say, not well known for their tactical acumen when it comes to armored combat.
Also, the sho't kal is a seriously hot-rodded machine that is a hell of a lot better than a 1945 vintage centurion (which I agree is roughly comparable to a panther, except that the centurion actually works). In addition to the bigger gun and all the extra armor, it has an entirely new (American-made!) engine and transmission. They also received new fire control, fire extinguishers, turret motors and gun elevation equipment, although I don't know if they had all that stuff in 1973. They had the American engine and transmission for sure though. Most nations that operated the centurion after the 1970s upgraded theirs to Israeli spec (e.g. Sweden).
Horstmann suspension was OK by WWII standards, but outdated thereafter. The biggest problem with it is that the road wheels are not independently suspended. As you can see in the picture above, the pairs of road wheels share a common spring.
This has a few small advantages, such as being lighter as well as providing more resistance to vehicle pitching oscillation. If you look at this commonly referenced German test of tank resistance to pitching, you can see that the vehicles without independent suspension tend to do better.
This is undercut by one enormous disadvantage; non-independent suspensions have horrible ride quality at high speeds. What happens is that the pairs of wheels sharing a spring will both be compressed by obstacles at the same time, effectively doubling the spring constant and making it much more likely that the road wheels bottom out.
Granted, centurion and chieftain had such ass power to weight ratios that this was probably not a huge concern. But still; it was not the way forward.
Horstmann does have the advantage of not taking up room inside the hull at all, and being (supposedly) easy to repair. The prevalence of torsion bars in post-war tank design suggests that these are secondary considerations. Also, there are ways of getting torsion bars to be less obnoxious, like on the AMX-30 where the third swing arm is reversed so that the turret basket sits between the torsion bars:
Picture courtesy of Walter
Other than that, it's hard to make generalizations. A description like "torsion bar suspension" really only tell you what shape the spring suspending the roadwheel swing arms is. That doesn't really tell you much about the important parameters of suspension performance like spring constants, travel length, unsprung mass, damping coefficients or harmonic period. It just tells you that the swing arm is attached to a cylindrical piece of steel that it twists.