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Weapons of War The machinery of warfare. .

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  #16  
Old 01 Feb 17, 11:47
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Quote:
Originally Posted by Moulin View Post
I see it's named after some real life Strykers--same name as John Wayne's character in Sands of Iwo Jima

they do use it though, yes? wheeled? why didn't they use a tracked version?
Wheels are faster on paved roads, almost as agile cross country as tracks, especially in arid country, and require far less maintenance than tracks.
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  #17  
Old 02 Feb 17, 00:53
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Originally Posted by Bluenose View Post
But often at the cost of higher ground pressure. There are some embarrassing photos of Canadian 8x8 getting stuck in Afghanistan...
True, no different to the pics we saw of M1s sunk in Iraq... but I'd be more induced to recovering an 8x8 than a MBT.
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  #18  
Old 02 Feb 17, 07:19
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True, no different to the pics we saw of M1s sunk in Iraq... but I'd be more induced to recovering an 8x8 than a MBT.
Yes, though I would suspect a tracked vehicle is less likely to get stuck in the first place.

IIRC, the Coyote or whatever it was sent to rescue the first vehicle also became stuck.
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  #19  
Old 17 Feb 17, 01:42
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The best way to avoid roadside bombs is to go off road. If roadside bombs in Iraq and Afghanistan are bad I can only imagine what the Russians would have waiting for the 2nd SCR if NATO intervenes in the Ukraine or Georgia.
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  #20  
Old 18 Feb 17, 02:20
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Quote:
Originally Posted by Pruitt View Post
Maybe it is just me, but I don't see a crying need for Ambulances keeping up with Abrams and Bradleys.
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Driving a M1068A3 (M113 variant) with a medical attachment that has M113s in a wheeled convoy is frustrating. Slows down entire convoy where the majority of them are Humvees and LMTVs. I do see a need to have ambulances to have greater speed, but I agree its not necessary for them to follow close to tanks and bradleys. Max speed of a M113 is only 27-30 mph.

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Originally Posted by 82redleg View Post
Engineer squads in the Armored Brigade Combat Teams fielded Bradleys to replace M113 a few years ago. I'm not sure if it is a specialized variant or simply a M2 IFV.

Heavy units (mech infantry and armor) had 4.2" mortars to replace 81mm a long time ago- definitely by the mid-90s, although some tracked 81mm carriers (M125?) may have hung around in the National Guard. The 4.2" mortars were replaced by 120mms, I'm not sure when, and I don't know if they replaced the carriers or just the tubes in them.
The engineer Bradleys we had in the last BSTB in the the Army before getting disbanded (mid 2015) were M2A2's, when the rest of the Army had M2A3 or M3A3's. Those M2A2's were still there but since rotating units from CONUS took over, with a BSB probably assuming those Bradleys, I'm not sure if those were upgraded or replaced. M106's were probably upgraded to M1064's or retired. M125's with 107mm could be upgraded to accept 120mm mortars, but could also be upgraded to M1064s. Thats whats great about the M113 chassis, was how interchangeable and easily upgradeable it was and is probably why support vehicles should've been phased over to a turretless bradley as soon as the Bradley came out.

Quote:
Originally Posted by Arnold J Rimmer View Post
I think they're trying to streamline the parts and training systems by common engine and powertrain systems.

Plus the M113 fleet has to be shrinking fast; IIRC the last ones were built in the 80s.
A great idea, especially when the people who know the M113 engine and powertrains best are retiring or have long since left. Seems units that have them prefer not to use them because once they break, it takes a while to get them back up. One frustration is that every time we have to pull the power pack, you have to drain the coolant. Bradley power packs don't have to do this and there is a LOT less to disconnect to pull it out. So it takes more to train someone how to pull a M113 pack than a Bradley pack. Also, I havent seen a unit that has a ground hop kit for a M113 power pack. This is basically a few hoses and cables to allow pack to be run outside vehicle. Also, no engine stand like the Bradley. So if something is wrong, we have to drain coolant again and pull pack back out to see whats wrong, put it back in and check. My squad is not planning on getting a Bradley ground hop kit to see if we can use it as a ground hop for a M113 pack, and maybe have our welders build us a custom engine stand. Sad that after so many years of this track being in the Army we dont have these two basic items that would save so much time and effort. Maybe they used to exist when battalions had to rely on M113s for movement, but now that they have Bradleys, Humvees and LMTVs no one cares. Another issue is the engine design and space available to work. One, the Army has no other vehicle that uses this engine anymore. Two vehicles, the LET and HET have much larger and newer Detriot Diesels, also doesn't help when the engine has been rebuilt multiple times, that and how operators have to keep foot to floor all the time just to keep up in a convoy.

Quote:
Originally Posted by Achtung Baby View Post
With improved wheel and drivetrain gear(inline drive etc), wheeled vehicles can match and even sometimes succeed tracked vehicles because of higher ground clearance. The MCCDC Amphibious Combat Vehicle Program required the ACV wheeled vehicle to be able to drive for 5 miles with a wheel blown off, the ACV drove more than 100 miles, so they figured that was enough.
One of the problems of wheeled vehicles off road is higher center of gravity to fit all that driveline in. That increases its risk of rollover and decreases traverse angle. Also military trucks tend to be rear wheel bias, meaning most power is sent to rear, can be bad if rear wheels cant find traction. Then you got the center of gravity when cresting hills. When a 6x6 or 8x8 truck gets up to and past its center of gravity it loses front and rear wheel traction, relying solely on center wheel(s) to propel it, which usually requires a fair amount of momentum, especially if a lot of weight is in the rear. A track vehicle doesn't really have this problem as it has a constant contact patch, even if the front road wheels and drive sprockets are in the air. The weight is usually focused up front where engine and drivetrain are at. One of the things they teach us to gain confidence in our 63.5 ton recovery vehicles is to drive up a hill to its crest, then stop and balance the track where both front and rear ends of the vehicle are off the ground, then keep driving.
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  #21  
Old 16 Aug 17, 20:30
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The ACV 1.1 can't swim. As looks it will probably replace the LAV 25 not the AAV7.
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