Exploding caravan... myth or reality

Submitted: Wednesday, Mar 07, 2007 at 15:22
ThreadID: 42992 Views:5048 Replies:9 FollowUps:11
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I was discussing caravan safety with a friend who is about to embark on a van tour, and we got onto the topic of the risks of towing a caravan, especially when passing large trucks and road trains.

Has anyone heard of caravans exploding when being passed by an oncoming truck? I would expect this occurs due to the difference in air pressure between the inside and outside of the caravan, especially when the opposing vehicles are travelling at speed. After performing a web search, I cannot find any evidence of the occurrence, which now has me thinking this could be a myth.

On a few occasions while travelling the countryside, I have seen caravans which have sides missing, their contents strewn on the roadside, and the towing vehicle remains unscathed. I put it down to the 'exploding caravan' theory, but maybe there is some other explanation.

Can anyone clear this up, or share their story?
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Reply By: Andrew from Vivid Adventures - Wednesday, Mar 07, 2007 at 15:59

Wednesday, Mar 07, 2007 at 15:59
Perhaps it comes from the Jong accident which resulted in the death of Mr. & Mrs. Jong and their daughter in their Explorer... often called an Exploder, but for entirely different reasons I suspect.

One way or another they clipped a semi overtaking them and their Galaxy van, and the rest is unfortunate history.

The coroner's report is found online here and makes interesting reading if you tow vans or intend overtaking vans that are swaying in the breeze.

I too have seen vans with sides missing, but I suspect it comes from striking vehicles going in the opposite direction rather than specifically getting their guts sucked out.
AnswerID: 225836

Follow Up By: Member - Beatit (QLD) - Thursday, Mar 08, 2007 at 15:00

Thursday, Mar 08, 2007 at 15:00
Andrew,

That report was an interesting read! My assessment being that the Jongs were inexperienced and possibly badly advised. You are quite correct in suggesting that it should be compulsory reading for anyone planning to join the grey nomad caravan journey. Quite possibly an avoidable tragedy and certainly an eye opener about set up and the like - and knowing what you are dealing with.

Kind regards
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Reply By: Member -Signman - Wednesday, Mar 07, 2007 at 16:17

Wednesday, Mar 07, 2007 at 16:17
And speaking of caravan towing....How may times have you seen caravan towing, where the caravan is heaps wider than the external rear view mirrors on the tow vehicle...The driver mustn't have a clue what's going on behind them, and from observation they don't have a camera setup either !!!!
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Follow Up By: Wizard1 - Thursday, Mar 08, 2007 at 09:52

Thursday, Mar 08, 2007 at 09:52
You obviously don't tow a caravan. I've towed one for several years all aroubnd this country on a variety of roads covering 10's of thousands of KM.

Most 4WD mirrors are very good without fitting extensions. Especially the left side which shows things closer. I fit extension mirrors and the increase visability is negligable as they don't actually let you see being the van when some IDIOT is right up the rear of the van in the blind spot. They then pull out suddenly and we're expected to know they were there.

Semi drivers are no better than most motorists, they too sit in the blind spot and pull out without warning which generally does not alolow us enough time to adjust our position on the road and pull further to the left..

Unless you have a rear camera setup you are blind. On straight roads I tend to "swing" the van so I can see the road behind me. Corners or bends assist as well.

Most vanners are usually very situationaly aware, as we have to be. Other road users, rather than get bleep of with us should understand its not all beer and skittles for us either.

Don't sit in the blind spot.
Drive with your headlights on ALL the time
Poke your car out first let us know you are there and overtaking.
Be a little more patient you will get past us eventually
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Follow Up By: Member - Roachie (SA) - Thursday, Mar 08, 2007 at 13:14

Thursday, Mar 08, 2007 at 13:14
Wizard,
I have a camera set up on my truck and camper, so much of this doesn't apply to me anyway.
However, a couple of things you said don't make much sense to me ........
You mention:
1). "when some IDIOT is right up the rear of the van in the blind spot. They then pull out suddenly and we're expected to know they were there."
My question is, how come you were not aware they were in their (in your blind spot) in the 1st place. Surely you'd be aware of someone approaching from behind and then "disappearing" into your blind spot?
2). " Semi drivers are no better than most motorists, they too sit in the blind spot and pull out without warning which generally does not alolow us enough time to adjust our position on the road and pull further to the left."
Same thing with this point....... PLUS, if you have a blind spot big enough to swallow a semi trailer, then you REALLY do have a problem, me thinks!!!

Sorry, not trying to pick an argument.....it's just that I was brought up to always "know" what was behind me. If you are aware someone has pulled into your blind spot, you automatically keep that in mind until they come out from it.

Semi drivers have the exact same problem, only more so.

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Follow Up By: Member - Beatit (QLD) - Thursday, Mar 08, 2007 at 15:08

Thursday, Mar 08, 2007 at 15:08
Not really wishing to stir here but I have often wondered about the signs on the big rigs "if you cant see my mirrors then I can't see you" and like Roachie I find that even with obscured vision at times I would always know what is behind me. Maybe I have always driven with one eye in the rear view since my boy racer days.

I have always been lead to believe that it was my resposibility to know, ie to have correct mirrors/cameras or the like. But I have been wrong before! So those signs have always been a bit of a mystery for me.

Kind regards
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Follow Up By: dj Patrol - Thursday, Mar 08, 2007 at 20:04

Thursday, Mar 08, 2007 at 20:04
Well Mr Wizzard, I dont know where you have been for a long while but you can get Mirrors to now see behind your van mabey its time you made a visit to a Spare Parts Shop as I tow a van 8ft wide and have mirrors to see whats behind me at all times but also you must look in the mirrors.
Hope I dont come up behind you in my travels,
So go look at the Aussie Truck Mirrors and you will notice whats goin behind you.

djpatrol
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Reply By: disco driver - Wednesday, Mar 07, 2007 at 16:18

Wednesday, Mar 07, 2007 at 16:18
Hi All,
Probably is less common now than it was a good few years ago.

Some of the early foam sandwich vans ( Viscount Aerolite and others) were rather more susceptible to this phenomenon.

Had one (Aerolite)explode in front of my rig a few years back... Scary.

Situation was as follows:
Relatively flat 2 lane bitumen, car & van travelling at/about 100kph, oncoming semi at about the same speed (Semi did not have a cabtop wind deflector). Definitely no vehicle contact.
Van literally sucked sides in and then out and continued outward and apart. Bits went everywhere.

Same thing (Exploding) has also been reported where vans have been travelling with gas fridge alight. Stupid risk to take and illegal here in WA too!!

IMHO this is not that common but it has happened on more than a couple of occasions.

Disco
AnswerID: 225843

Reply By: Member - Doug T (W.A) - Wednesday, Mar 07, 2007 at 16:23

Wednesday, Mar 07, 2007 at 16:23
bobber
No myth mate, when most van were made of plywood some did explode, reason being maybe the front window or hatch left open as an air scoop but no escape for the pressure at the rear and of course Cleavland Transport [ Mack Munchers] and many others use to cruise at about 130/150 kph across the Nullabor , that caused a few problems for the unexpected.

Doug
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Follow Up By: RosscoH - Wednesday, Mar 07, 2007 at 16:36

Wednesday, Mar 07, 2007 at 16:36
Doesn't only happen to caravans, only last year I watched as the drivers door was sucked off a car by a passing semi and sucked everything out of the car including the seat covers and the drivers handbag and I had to dodge the lot. The car was parked on the side of the road with 2 wheels still on the white line and the driver was bending over doing somthing on the seat with the door resting against her bum, how she did not go under the wheels I dont know but it was all pretty scary stuff. I would not have believed it possible if I had not seen it happen.
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Follow Up By: Member - Davoe (Nullagine) - Wednesday, Mar 07, 2007 at 16:38

Wednesday, Mar 07, 2007 at 16:38
Highway was a hellava lot narrower back then as well from memory about 3/4 the width of what you would consider a proper width road nowadays. often with deadly shoulders so if you left the bitumen you had a fight on. havnt seen a speeding truckie for many years but it used to be common. i remember dad flogging our old valiant up to 90mph to stay in front of a truck west of kimba to avoid getting passed on those one lane roads which passed as double lanes
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Follow Up By: Member - Doug T (W.A) - Wednesday, Mar 07, 2007 at 16:58

Wednesday, Mar 07, 2007 at 16:58
Davoe
quote : havnt seen a speeding truckie for many years but it used to be common/

Go and get an old truck from the seventies and I'll show ya one ....
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Follow Up By: Gramps (NSW) - Thursday, Mar 08, 2007 at 13:22

Thursday, Mar 08, 2007 at 13:22
"havnt seen a speeding truckie for many years"

ROFLMAO

Where have YOU been hiding???? Don't tell me you believe that speed governing crapola LOL
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Follow Up By: Member - Davoe (Nullagine) - Thursday, Mar 08, 2007 at 14:58

Thursday, Mar 08, 2007 at 14:58
Yep i do plenty of driving through the night i usually plan my trips that way I could not tell you the last time i saw a truck speeding (maybe a few ks over but thats it) and we have pleeeenty of truckies on the road over here at night
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Follow Up By: Gramps (NSW) - Thursday, Mar 08, 2007 at 15:35

Thursday, Mar 08, 2007 at 15:35
They must be more relaxed over your way Davoe. Over here it's a case of pick the truckie NOT speeding :)))
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Reply By: Gerhardp1 - Wednesday, Mar 07, 2007 at 16:28

Wednesday, Mar 07, 2007 at 16:28
Was discussing this topic recently with a Truckie mate, and it definately is no myth.

May well be restricted to older vans as observed above, but the pressure from the oncoming truck combined with a vent on the van left open will cause it to explode.

He has seen it happen, and it's not caused by physical contact of the vehicles, although that would also definately cause destruction when each is travelling at 100k or above!!
AnswerID: 225846

Reply By: Im.away - Wednesday, Mar 07, 2007 at 16:44

Wednesday, Mar 07, 2007 at 16:44
Not the same situation I realise, but I have seen the remains of a caravn that was hit by a willy willy as it was going along the highway. It flew apart and dragged the towing vehicle off the road in the process. We were about 400 metres behind luckily.
AnswerID: 225852

Reply By: turps80 - Thursday, Mar 08, 2007 at 15:54

Thursday, Mar 08, 2007 at 15:54
This is why we should close all windiws, vents and doors when mobile. The air pressure inside a van can increece when large vehicles pass at speed.
How come we aren't required to have trailer / towing endrosement on our drivers licences.
We need to have light truck to drive a vehicle over 4.5 tonnes yet we can drive a car (4x4) and trailer/van that might be over 5 tonnes, with no extra training or skill.
AnswerID: 226087

Reply By: ross - Thursday, Mar 08, 2007 at 16:11

Thursday, Mar 08, 2007 at 16:11
Its a good question bobber. I have heard of the phenomenon but have never witnessed it.
The theory makes sense but whether the difference in pressure is enough ,or if a caravan is sealed tight enough to make it explode is beyond me.

I suspect the van would more likely bulge and split at a seam rather than come apart totally.

Im sure Mythbusters would have a ball with this one
AnswerID: 226092

Reply By: _gmd_pps - Thursday, Mar 08, 2007 at 18:18

Thursday, Mar 08, 2007 at 18:18
another typical "Australian Standard" which defies all logic.
Germany is the land without speed limit (at least it still has some unrestricted parts of the Autobahn). They have a huge amount of trucks and caravans going through the country .. why do you think there is a general speed limit of 80km/h when you tow and that include all trucks .. Buses can go 100km/h with special conditions and you can apply for an exception to the rule and apply for 100km/h for your caravan when you use :
A vehicle with ABS
Weight distribution hitch
Anti saway control
Tires not older than 6 years
Registered weights in you vehicle documents (including trailer)
btw those vehicle documets don't exist in Australia ...

Nobody, I say NOBODY would ever consider it acceptable that a truck not to say a road train would ever be allowed to go 110 km/h ..

the rule here in WA is even more ludicrous 100 km/h for towing and 110 for others which triggers all the passing of mums and dads thinking they have to go faster than a road train ..

have fun
gmd
AnswerID: 226119

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