From: Steve Randall (srandall64@hotmail.com)
Date: Fri Feb 13 2004 - 19:31:48 PST
I'd have to agree, The photo of Johansen truck, looks like the roll over
protector is attached to the bed of the truck and not the frame.(hence, bed
bolts are protecting you).. The fact is that the 12,000 lb truck number one
is more likely to roll on to it's side as apposed to roll over because of
the slower speeds of these trucks and the weight is concentrated below
centerline in the truck. In the event the truck rolled over (as in 360
degree) the impact pounds on the roll bar would be more like 36,000
pounds..Another way of looking at it would be draw a straight line from the
top of the roll over bar down to the top of the engine block and see what is
left for space in the cab after putting all of the cab outside that line in
the cab with you, because if it did roll, all the sheet metal would be
crushed down to al least the engine block. The only way to build a safe
rollover device would be to make a NASCAR style cage (on a much heavier
scale) that would encase the entire occupant area for a minimal impact of
what 18 tons? Would be very hard to accomplish in the area of space provided
and still have a functional truck.
Just my two cents,
Steve
>From: "James M. Atkinson" <jmatk@tscm.com>
>To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
>Subject: Re: [MV] Roll bar on 5 ton and deuces? Anyone know of a mil one?
>Date: Fri, 13 Feb 2004 21:55:56 -0500
>
>
>If your vehicle rolls, flips, or any variation thereof you do not want to
>"get thrown" out of the vehicle as there is a very high probability of
>death. Instead ride it out, and only exit the vehicle once it comes to a
>complete stop. This is something that any combat driving instructor will
>teach.
>
>If you think you might encounter a situation where you might find yourself
>flip, tipped, or rolled then enclose yourself in a roll cage capable of
>supporting three times the gross weight of the vehicle.
>
>In the case of a duece or 5 tonner you will need a moly-chrome steel cage
>around the inside of the engine compartment and nose, along with a roll
>cage around the passenger cabin. Also you will replace the bow and staves
>with removable ones made of tubular steel, with cross braces, with at least
>one (usually the one nearest the cab) being permanent attached. This is
>also a good time to add an I beam for a trolley chain fall system.
>
>While your at it you may want to slide the bed of your duece back a bit to
>give yourself a place to store an extra tire, tools, chains, genset, and an
>auxiliary fuel tank.
>
>-jma
>
>
>
>
>
>
>At 08:36 PM 2/13/2004, David Cole wrote:
>>I second that vote - I'd much rather stay in the vehicle.
>>
>>I speak from experience - I rolled a '74 Audi Fox in the hills of Tennesee
>>one night in the late 70's, did three complete rolls before coming to a
>>halt in a ditch. I can still remember seeing the pavement slide over my
>>head as I hung from my seat belt upside down. I drove that car for 800
>>miles more (I was on vacation). Soon after the insurance company declared
>>it a total loss and it was scrapped. Every panel on the car was smashed
>>and the rear window and one side window were gone.
>>
>>All of the stuff in the back seat, was in the middle of the road.
>>
>>Once is enough.
>>
>>Dave
>>
>>
>>On Fri, 13 Feb 2004 20:00:25 -0500, Ryan Gill <rmgill@mindspring.com>
>>wrote:
>>
>>>At 12:49 AM +0000 2/14/04, noel shelley wrote:
>>>>Hi All ,
>>>>The roll bars would need some very careful thought . Bearing in
>>>>mind the weight of the vehicle and the fact that very little may stand
>>>>above
>>>>the hood and sides caperbable of load bearing . The structure would have
>>>>to
>>>>be very substantial and heavyly braced on to the chassis .
>>>>Though not a pleasant thought , you might be safer thrown clear rather
>>>>than
>>>>traped in twisted metal .
>>>
>>>I'd rather stay in the cab than get tossed out and have the truck roll
>>>over me.
>>>
>>>http://www.e-z.net/~ts/ts/ts.html#roolovers
>>>--
>>>--
>>>Ryan Gill rmgill@SPAMmindspring.com
>>>----------------------------------------------------------
>>>| | | -==----
>>>| O--=-| | /_8[*]°_\
>>>|_/|o|_\_| | _________ | /_[===]_\
>>>/ 00DA61 \ |/---------\| __/ \---
>>>_w/|=_[__]_= \w_ // [_] o[]\\ _oO_\ /_O|_
>>>|: O(4) == O :| _Oo\=======/_O_ |____\ /____|
>>>|---\________/---| [__O_______W__] |x||_\ /_||x|
>>>|s|\ /|s| |s|/BSV 575\|s| |x|-\| |/-|x|
>>>|s|=\______/=|s| |s|=|_____|=|s| |x|--|_____|--|x|
>>>|s| |s| |s| |s| |x| |x|
>>>'60 Daimler Ferret '42 Daimler Dingo '42 Humber MkIV (1/3)
>>>----------------------------------------------------------
>>>
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>>
>>
>>
>>--
>>Dave
>>
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>
>
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Steve Randall
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