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Lert

Some interesting Dutch military vehicles from the 50s

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Three interesting Dutch military vehicles I wanted to post about. Didn't know where else to post them so I put them in off topic / misc.

First of the three:

DAF_YA_126.jpg

DAF YA 126

A 1950s era 1-ton truck by Dutch manufacturer DAF. This light truck / prime mover was introduced in 1953 to replace the Dodge WC we were using at the time. 3496 were built in many variants, from weapons carrier to prime mover, from radio truck to ambulance. The spare wheel was mirrored on the other side and suspended to freely rotate, to aid in case the truck high-centered in terrain.

YA-328-20160416-Martin-Bos-9469.jpg

DAF YA 328

126's bigger brother, a 6x6 truck with 3 ton capacity, also introduced in 1953. Once again the spare wheels were able to freely rotate to aid when the truck became high-centered. 4510 were produced in four main variants.

YP408-20160826-Martin-Bos-1061.jpg

DAF YP 408

A 8x6 APC with space for 10 men with full kit. The two front-most and four rear-most wheels were driven, the four front-most wheels could steer. 750 were built in various variants from 1959 onwards and was in Dutch service until 1989.

Now why are these three so interesting?

The most interesting aspect about these three vehicles was their shared drive train, the so-called H drive train:

H_Drivetrain-DAFTrucks.png

DAF YA 328 drive train, shared with the YP-408 and YA 126, the latter omitting the two rearmost wheels.

The drive went from the gearbox to a central transfer case which split off to a drive train on either side of the vehicle. From there it went permanently to the rear wheels and front wheel drive was selectable. Since these vehicles lacked an axle between the wheels on either side they had higher ground clearance than similar vehicles with a more conventional drive train, and remarkable off-road capabilities because of it. The drawback was that this drive train was fairly complicated, with a larger number of transfer cases and maintenance could be a bit of an issue.

Bonus content:

A DAF YA 126 in terrain:

DAF YP 408 at Tankfest:

Too bad they seem to think it's Belgian, but it's still lovely to see her go around.

Edited by Lert
  • Cool 3

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1 hour ago, Pirate_Named_Sue said:

That drivetrain is insane. So many things to break!

Except for the central box, which pretty much everything has, the drive train components are tucked out of the way.  Plus independent suspension.  It would be interesting to compare weight to central-diff systems, too.

 

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20 minutes ago, iDuckman said:

It would be interesting to compare weight to central-diff systems, too.

I'd think this be a bit heavier for a given capacity, with the additional transferboxes and more axles. Though from the description and captions of the parts in that schematic, the final drives seem to use worm gears which means a big reduction in RPM and increase in torque, which means the axles between the engine / gearbox and the final drives can be thinner, since they spin faster for a given wheel RPM, if that makes sense.

Edited by Lert

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1 minute ago, Lert said:

more axles.

Same number of axles (one per drive wheel), but short axles without heavy housings.  More diffs and propeller shafts, though.  But the wheel "diffs" should be simple geared drives (worm drives?) rather than heavy true differentials.  How does 'Wormkast' translate?

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1 minute ago, iDuckman said:

How does 'Wormkast' translate?

Worm box. That's what I was referring to with worm gear final drives :)

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Oh, missed that paragraph.

 

Edited by iDuckman

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2 minutes ago, iDuckman said:

Oh, missed that paragraph.

I edited it in after posting, so that's entirely possible.

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