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Post Info TOPIC: Fascines and Cribs


Corporal

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Fascines and Cribs
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Does anyone know what the release hook looks like and its exact location behind the drivers cab for the chains holding Fascines on Mark IV tanks and

Cribs on the Mark V's.

From studying photographs it appears the chains holding the Crib on Mark V tanks are attached to a release mechanism somewhere centrally behind the

cab and I assume its similar arrangement for Fascines on Mark IV's.

Any insight into this would be appreciated

 

Thanks

 



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Captain

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Hello Geoff
For the MK IV , it is a kind of finger holding the ring connecting the 2 chains in "V"
This finger is located at the mid rivet of the aft of the bottom of the cab.
Rivet is removed and the finger is passing through
In the cabin the finger shaft ends up with a handle that you have to turn to release the fascine
For the MK V I do not know but as the system was OK for the fascine of MK IV ....might be the same.
Best Regards
Olivier

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Corporal

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Olivier
Thanks for the info. I had a rough idea but wanted to get it confirmed. Probably was the same or very similar for the Mark V.

Geoff


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Captain

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Hello
A picture ( Crusty ) and a quick drawing to explain the device.

Best Regards

Olivier



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Lieutenant-Colonel

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I have added some renderings of my CAD-model in my thread:

landships.activeboard.com/t58344032/mark-iv-3d-cad-drawings/

Best regards,
Thorsten

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Corporal

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Olivier
Thanks for the drawing, its as clear as mud now.

Thorsten
Thanks for the input much appreciated.

Geoff

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Corporal

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Thorsten
Have now studied your renderings re the fascine. I must confess I had missed the block of wood at the bottom of the fascine in photographs.
What is the attachment on the block of wood in your drawing does this assist in the tensioning of the fascine or does it attach to the tank.
Your video has also cleared up the visor opening on the cab as I'd read somewhere that the small one would not open fully without opening
the larger one.
Geoff

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Lieutenant-Colonel

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Geoff,

the wooden block is slung between two ropes, forming a Spanish windlass to tension the chains.

Thorsten

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Olivier
Just read my response to your message, I mean to put that it was as clear as a bell. Your drawing made it perfectly clear.

Geoff

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Thorsten
Not the windless, I meant the block of timber (looks like a railway sleeper) embedded at the bottom of the fascine which is held in place by the chains and I assume that it is to help steady the fascine on the unditching rail. On your drawing there is something attached to this block.

Geoff



-- Edited by geoffypres on Tuesday 16th of May 2017 08:16:18 AM



-- Edited by geoffypres on Tuesday 16th of May 2017 08:31:18 AM

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Captain

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This is a railway slipper and it is part of the fascine itself
It set up on the 2 hooks of the cab, reason why it was difficult to position the fascine properly without the assistance of a crane
If you read Bion , they did not had this device for their tank and that was hell to position the fascine properly.
For me there was no device attached to the timber , or I missed something
Best Regards
Olivier

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Corporal

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Thanks Olivier, If I add a fascine to my Mark IV model I'll include the sleeper in the fascine but probably leave it at that. I'll just add the securing chain to the
back of the cab and the Windless in the front. Thanks again for your help its been very much appreciated I always like to know how things work if I'm going to
include it on a model.

Geoff

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Major

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Another question(s) which came in my mind:

Were that ropes attached just for the transport?
Other devices, as the Hayney book (p.110), shows a original drawing, were a CHAIN is attached to the front hook.
So they maybe tighten them up for secure transport on the railway?

And what happend to the chain after releasing?
It would be still attached on the front hook and slipped underneath the tank while driving further on.
Well, maybe this wouldn't harm that much, because there might be no obstacles on the battlefield that a 28t tank couldn't handle (or the hook might break away).
I can't imagine that somebody would go out side just to release it..

 

What do you think (or maybe know)?

(transfered from: https://landships.activeboard.com/t58344032/mark-iv-3d-cad-drawings/?page=2&sort=oldestFirst - were you'll find the release mechanism along a lot of very good CAD drawnings!)

  

 

reply

  thorst wrote:

    The drawing in the Hayne's manual is rather a scheme than a blueprint. All pictures I know which show the fascine in this position seem to show ropes.

    After releasing, the ropes just fell off. That is why the hooks at the front point to the bottom. The lugs will just slide off.

    But for a further discussion, I would suggest to start a dedicated thread with your questions, such that the topic can be found by a search in the forum in the future.

    Best regards,
    Thorsten



    -- Edited by thorst on Wednesday 15th of November 2017 05:57:36 PM



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