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Old 01-29-2006, 08:01 PM   #1
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1958 26' Overlander
Mesa , Arizona
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Read This... Disaster Averted

My wife and I recently went on a trip in our 1972 Sovereign. Near the end of the trip, I turned a corner and suddenly heard loud, metallic scraping sounds. The first thing that came to mind was that my WD hitch had come loose. I immediately pulled off the road and inspected my silver baby. What I saw left me totally speechless. Both propane tanks were dragging on the ground with the LP lines going to them damaged with gaping holes. The tension rod which kept the tanks and LP regulator secure to the A frame had snapped in two, leaving both tanks totally unsupported.

I was immediately struck by how fortunate we were. If the LP tanks had been left open the damaged LP lines coupled with sparks generated by the tanks dragging on the road would have resulted in an explosion and fire. This could have possibly taken the life of my wife and I. The incident still gives me the willies. I shudder to think what would have happened. I thank the Lord that I decided to turn the tanks off before we left to go home.

Anyhow, I thought I'd share this incident with fellow Airstreamers in the hope that folks would think twice before travelling with their LP Gas system charged. I know I'm a firm believer now. Don't travel with your LP system charged!!!!!
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Old 01-29-2006, 08:07 PM   #2
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1971 23' Safari
Riverton , Missouri
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You are very lucky the tanks were not punctured, and that the propane lines held.
Not saying I think you should have your propane on, but if you had aluminum tanks there would be no sparks if this happened.

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Old 01-29-2006, 08:22 PM   #3
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1955 22' Flying Cloud
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another item for the rebuild

I'm rebuilding a 1963 Bambi. I will be adding a new rod to the propane tank mounting system. Thanks.
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Old 01-29-2006, 08:22 PM   #4
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1977 31' Sovereign
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1989 34' Excella
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Securing your tanks

Some Airstream tie down rods were just cross pinned at the bottom. Sometimes the pins would break. I replaced mine with a threaded rod with two nuts at the bottom.

Some of the cast aluminum cross tees for the top of the tanks have been known to break. The casting have low ductility becaused they chose the wrong alumimun alloy when they made them. I think it was a high silicon alloy which is high strength but low ductility. I have a broken one of those too. You can not do anything about that but you should not overtighten the hold down wing nut.

A cross tee which is not tight enough may allow the bottles to wiggle and rotate to the point it will come to the opening in the handle and fall off the front of the trailer. I had it happen to me. I solved that one with a securing pin assembly which I made. Also works for steel tees.
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Old 01-29-2006, 08:31 PM   #5
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Holy Moly! What a horrible near accident! I need to refill my tanks before the next outing, I think I will give the hold down system a good inspection. Thanks for the scary tip!

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Old 01-29-2006, 08:51 PM   #6
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1992 34' Excella
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Did that on the Cross Bronx Expressway in my 1977 31". The pin in the bottom sheared off. One tank was dragging under my trailer. Having a cover on the tank would have prevented this. I also recommend to those of you that do not have a cover, it is useful to install a strap around both tanks. WBCCI 30916
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Old 01-29-2006, 10:01 PM   #7
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I had replaced my rod with a threaded rod also, but still am not satisfied with the hold they have on the tanks. I do have a plastic cover that holds them on, but I really don't like the cover. Can you show me a close up of those hold downs you made, or could I pay you to make some?
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Old 01-30-2006, 06:57 AM   #8
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1977 31' Sovereign
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1989 34' Excella
Johnsburg , Illinois
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Here is a closer picture of the clips used with steel cross tee hold down on my 63 with steel tanks. The application is slightly different but the principle is the same. I used to use a plastic coated steel cable used to secure bikes with a lock. It also help prevent someone stealing the aluminum tanks. The safety guys at the International did not like tanks locked to trailer. They said," in case of fire they would come over and remove bottles before they exploded". I would like to see someone that brave (or stupid) trying to get propane tanks off a burning trailer.
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Old 01-30-2006, 07:16 AM   #9
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2006 25' Safari SS SE
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This Forum is great & I learn a lot here. I also use a plastic coated bicycle cable to lock & secure my tanks. I was thinking anti-theft, and not the possibility of falling off. I always turn them off when traveling, now I’ll update my checklists to ensure they are very secure. ‘Remove Tanks In Case of Fire’ is another issue. So I’ll get a bigger fire extinguisher to keep in the tow vehicle.
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Old 01-30-2006, 06:44 PM   #10
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There are several issues involved

Leaving your LP Gas system charged is obviously one. The other is the failure of the tension rod. Mine looked identical to DWIGHTDI's first post above except mine wasn't threaded the entire length. My rod simply snapped in two where the pin goes through.

The moral of the story is that frequent inspection of your entire LP tank and tie down system is a must. I love some the precautions some posted here to keep their tanks secure. You can never be too careful.
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Old 01-30-2006, 06:45 PM   #11
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Mansfield , Texas
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Oh wow. When we travel with our propane turned off, you think all is well. I would have never thought the hold down rod was such a weak spot. Thank God those tanks didn't explode.I'm going to check ours first thing in the morning.
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Old 01-30-2006, 07:09 PM   #12
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If the tank valves had been open the OPD mechanism would have kicked in and shut the flow off, it is part of what they are designed to do....that is if you have the properly upgraded valves. I am still seeing RV's with the old style valves. I agree there are better hold down methods for the tanks. You also have to take into consideration the age of the hold down mechanism, I am sure they have traveled many thousands of miles and been subjected to various types of abuse. Replacement of a 30+ year old hold down mechansim is probably cheap insurance.

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Old 02-01-2006, 06:02 AM   #13
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Smile Thank goodness everyone's ok

Whew what an experience! Thanks for sharing it, I'm adding inspecting the propane tanks (making sure they aren't charged and looking securely fastened) to the departure checklist.
Steph in MI Air# 6996-
I Hockeytown USA!!
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Old 02-05-2006, 01:19 AM   #14
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1977 31' Sovereign
Chase , British Columbia
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Propane tank clamp

Hi all,

When I bought my '77 31', the p.o. told me about making sure the tanks were secured properly and to inspect the rod and hold-down, etc. as he had seen tanks come off a trailer before. I figured that must have been a freak occurrence and gave it no more thought.

The next morning, as I was driving the ten hours home over the Rockies with my new pride and joy, I was well behind an old SOB when I suddenly saw something white bouncing under the trailer (at 70 mph). I sped up to get closer and could see that it was a propane tank bouncing between the pavement and the bottom of the trailer!! Then I backed WAY off. The hose held on for almost a mile or so, then the tank came free, went under the axle (causing the SOB to lurch and bounce--the right wheel nearly left the ground), and finally hit the ditch. I couldn't believe that the driver didn't seem to notice. The highway was four lanes, and I had to really push it to get up beside him. He was a very senior citizen and didn't notice me honking and waving for about five more miles!!! Even then, he seemed to be suspicious of this idiot waving at him. Finally he pulled over and was a little huffy until he saw for himself what had happened.

Now I check and re-check the clamping set-up.

Gary H.
Prince George, BC

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