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Another effect of higher than normal temperatures


Geoff S
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Being a very new caravan user (we replaced our ageing campervan with a 2 berth Swift Basecamp 2) I was a bit concerned about caravan punctures and not being aware of them until a flailing tyre had wrought untold damage to the van.  I bought a tyre pressure monitor from Banggood.  It's intended for cars but it works perfectly using just 2 monitors and the RF connection has no problem with the display on the car's dashboard.

 

We returned from a short break yesterday when the ambient temperature was about 36 deg.  The van's tyre pressures increased from 50 psi to 58 and triggered the over pressure alarm I'd set to what I thought adequately high.  Not a serious problem but I assume the car tyre pressures were equally affected.  There's built-in tyre pressure monitoring for the car but I'm not sure if it triggers for over pressure.  I was surprised the pressure increase due to temperature was getting on for 20%.

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Yes pressure increase is worth noting as many blowouts occur in this high heat.  Also when you park up after the tyres have become  really hot they can settle with flat spots as they cool down . This can give a thumping sound when driven or a wobble on car steering but usually goes as the tyre warms normally .

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35 deg may be extremely high in the UK but of course is fairly normal, even lowish, in other countries.  I've driven or been driven around a fair chunk of Oz in temps ranging from early morning frost to near 40 deg mid afternoon but never heard of any problems in this respect.

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2 hours ago, Geoff S said:

Being a very new caravan user (we replaced our ageing campervan with a 2 berth Swift Basecamp 2) I was a bit concerned about caravan punctures and not being aware of them until a flailing tyre had wrought untold damage to the van.  I bought a tyre pressure monitor from Banggood.  It's intended for cars but it works perfectly using just 2 monitors and the RF connection has no problem with the display on the car's dashboard.

 

We returned from a short break yesterday when the ambient temperature was about 36 deg.  The van's tyre pressures increased from 50 psi to 58 and triggered the over pressure alarm I'd set to what I thought adequately high.  Not a serious problem but I assume the car tyre pressures were equally affected.  There's built-in tyre pressure monitoring for the car but I'm not sure if it triggers for over pressure.  I was surprised the pressure increase due to temperature was getting on for 20%.

I had a tire blow out on my Toyota Prius a few years ago in Texas. I had parked it on black tarmac in the midsummer, midday sun for about half an hour. When I drove off the car rapidly developed a repetitive bumping sound, as though something was stuck in one of the tires, and the car was rising up and down slightly as though what was stuck was protuding downwards. I stopped the car, and had a good look round and could see nothing stuck in any of the tires. So I drove off again and hadn't gone more than a few hundred yards when then was an explosion - a very loud bang, and the car immediately slumped down on one side. A tire had blown out completely - there was a flap about four inches in diameter hanging out from the inner side wall. I put on the spare tire, and took the car straight to the local Toyota garage and they said they had never seen a blown tire quite like that. Incidentally, I had just had the car serviced before this happened, so I think the tires may also have been overinflated before I parked the car on the black tarmac.

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1 hour ago, Brian Sweeting 1 said:

This is one occasion where having your tyres inflated with Nitrogen can be beneficial.  The problem is not defeated but reduced.

Are you sure, I read 'somewhere' that inflating tyres with Nitrogen it was a load of rubbish,,,

 

 read this just now,,,

 

https://autoexpert.com.au/posts/top-10-reasons-why-nitrogen-wont-help-your-tyres

 

Edited by Paul De Tourtoulon
lien
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Unusually for me since my best career move ever - early retirement - I’ve been using 20 odd miles of the M1/M25 on an almost daily basis for the last couple of weeks and during this hot weather I’ve been astounded at the numbers of vehicles stopped on the hard shoulders. Many appeared to be disabled by flat tyres and I was recounting to my wife just today how I’d run over a kerb quite gently at slow speed while doing a U turn to avoid jammed traffic many years ago in hot weather and ripped a large flap from the sidewall of a tyre on my work van. 

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10 hours ago, John Stainforth said:

Well, I did once have a pistol pointed straight at me, at point blank range, by a policewoman in Texas when I got stopped because I had a defective rear light.

So they spotted you in a German car using your indicators,,😅

 

I do a few track days on my bike, the track temperature probably exceed 60°c with the air around 30° and I have never seen anyone use nitrogen in their tyres a picture after 15 minutes on a cold track day and it does end up by lunch with lots of ball of melted rubber.

aprilia tyre.jpg

Edited by Paul De Tourtoulon
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Boyles and Charles law, but your increase wasn't 20% as the pressure we measure is gauge not absolute, in absolute terms the pressure went from 65psia to 73 psia, still a 12% increase and as the temp went up by roughly 10% (Deg Kelvin) that's about correct.

Edited by Frank Skilbeck
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What 'higher than normal' temperatures?   It's summer... the sun shines and it gets hot out. There was ONE recording of over 40 degrees and that was geo-located to be half way down the runway at RAF Conningsby, the other example cited as 'the apocalypse caused by global warming' was Heathrow - the worlds busiest airport in the middle of the airports busiest time of the year. Honestly.. concrete and jet exhaust, what do you expect?    Temperatures above 35 degrees are commonplace during the summer months all over Europe, as Brendon O-Neill of the Spectator commented.. “It’s sunny. Go outside. Sit in the shade. Have an ice-cream”.

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FlyingFlynn you must live with your head in sand. I live in Cambridgeshire and nowhere an airport and on Monday and Tuesday it was extremely hot, I tried sitting in the shade and there was a breeze blowing, a hot breeze and it was very uncomfortable. We had all our doors, windows and curtains/blinds shut it helped but it was still uncomfortable. Maybe I should have stuck my head in the sand like you and pretend nothing is going wrong and this is normal.

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Errrrrrrr, l live in western France, half way down the Bay of Biscay. One of the sunniest areas of France. I assure you, temperatures above 35°C are not commonplace. They stop normal life.

BTW, idiot O’Neil might add to his education, and he could study the devastating effects of heat on the health of sugar cane cutters. Or even, closer to home, how many excess deaths there are going to be . 

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1 hour ago, Martin Harris - Moderator said:

I remember 50 years ago climate experts were predicting the imminent return of the ice age!

Media driven myth then, still being pedaled today. From memory, it was about aerosols in the upper atmosphere, like Sulphur Dioxide. They cause cooling. Their effect was overestimated, their concentrations have reduced with Clean Air Acts, and no longer apply. The author of the main study has gone on record that it was wrong. 
Even back then the vaste majority of “climate experts” were predicting rising temperatures. The oil companies own research predicted heating. It was about this time when they started supporting climate change denial.

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3 hours ago, FlyinFlynn said:

What 'higher than normal' temperatures?   It's summer... the sun shines and it gets hot out. There was ONE recording of over 40 degrees and that was geo-located to be half way down the runway at RAF Conningsby, the other example cited as 'the apocalypse caused by global warming' was Heathrow - the worlds busiest airport in the middle of the airports busiest time of the year. Honestly.. concrete and jet exhaust, what do you expect?    Temperatures above 35 degrees are commonplace during the summer months all over Europe, as Brendon O-Neill of the Spectator commented.. “It’s sunny. Go outside. Sit in the shade. Have an ice-cream”.

 

It certainly has been exceptionally hot.  Summer 1995 (the year I retired) was very warm and dry but nothing like this.  I had a new frame built in  Reynolds 653 and never bothered fitting mudguards until the autumn and rode 1000s of miles - some of them the 20 miles each way for model flying lessons 🙂  Brendon O'Neil is an idiot.

 

I'm old enough to remember the summer of 1976 very well.  One weekend in June a cricket match in Buxton was cancelled because of snow and the following weekend the drought began.  It wasn't the temperature that was the big talking point; it was the lack of rain.

 

We had 2 sailing holidays that year. 

 

The first (in August) was the national championships for our dinghy class (Graduate) in Saundersfoot.  It was certainly warm but we still wore wet suits.  The sand above the tide line was too warm to walk on in bare feet and it was impossible to walk on the prom without stamping on some of the 1000s of ladybirds crawling around - never seen so many before or since.  It was a championship for the light airs specialists as the wind was very light.

 

The second was on the Clyde in September. My wife and I with another couple chartered a 27' Sabre yacht based in the Gare Loch and cruised the northern part of the Clyde (we weren't permitted to go south of the northern tip of Arran). Unfortunately we had to use the auxiliary engine quite a lot because of the lack of wind.  The main features were 13/14' long basking sharks which you could sail alongside and giant jellyfish that looked like floating Victorian lampshades.  The temperature wasn't really a problem and was much lower than 30 deg.

 

btw the tyre pressure monitor this am read 49 psi.

 

 

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In the South East '76 was an odd year. The (very) hot weather started early (I recall it being hot at the spring bank holiday (or Whitsun, as we used to call it).

Went on holiday in June / July, 4 adults + dog + luggage in a VW Beetle. The roads between London and the south coast were melting, with little streams of bitumen puddling in the gutters. 

I went to Santa Pod Raceway on August bank holiday and it started to rain - not ideal for drag racing with 2500hp under your right foot. It didn't stop raining for about 9 months - I know this because I was doing a 70 mile commute into London each day, and I was wet a damn site more than I was dry right through that winter and well on into the spring / summer of '77.

I blame it on - who was it?? - the fellow who was appointed minister for drought about 10 days before the weather broke, can't remember his name.

Kim

p.s. re: the great Nitrogen in your tyres debate, we used to use it in Karts and car racing, as it was more temperature stable at racing speeds - not as much pressure rise and more stable tyre carcass temperatures. As to its usefulness on the road, less convinced.

p.p.s. I guess that your caravan tyres are of the reinforced type - the pressures could otherwise be dangerously high - the maximum inflation pressure marked on the sidewall of normal car tyres can be surprisingly low.

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Funny what you can find on internet, I moved to St Gilles du Gard in spring of 1976, after Newcastle it was hot, here touching the 40°c,https://www.francetvinfo.fr/replay-radio/histoires-d-info/histoires-d-info-en-1976-la-canicule-provoque-une-hausse-d-impots_2226581.html

 

 I did a lot of Karting over here till around 2005 and I have never seen nitrogen in the kart tyres and yes it's bloody hot down here in the south of France.

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To be honest, with the karts it was just more convenient to carry a bottle of nitrogen around (which I used at work) than to carry a compressor / generator.

On the car, it was a measurable difference. Used to have all of the old setup / data sheets to prove, but binned them all when we moved house recently.

As I said, on the road?? Probably not so much!!

Kim

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2 hours ago, Kim Taylor said:

p.p.s. I guess that your caravan tyres are of the reinforced type - the pressures could otherwise be dangerously high - the maximum inflation pressure marked on the sidewall of normal car tyres can be surprisingly low.

 

I'm not sure if the tyres are reinforced, just that the manual quotes that the tyre pressure should be 50psi, which, incidentally, is the same as for our old Ford LWB Transit based campervan.  I usually set my bike tyre pressures at 90 psi.

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12 hours ago, FlyinFlynn said:

What 'higher than normal' temperatures?   It's summer... the sun shines and it gets hot out. There was ONE recording of over 40 degrees and that was geo-located to be half way down the runway at RAF Conningsby, the other example cited as 'the apocalypse caused by global warming' was Heathrow - the worlds busiest airport in the middle of the airports busiest time of the year. Honestly.. concrete and jet exhaust, what do you expect?    Temperatures above 35 degrees are commonplace during the summer months all over Europe, as Brendon O-Neill of the Spectator commented.. “It’s sunny. Go outside. Sit in the shade. Have an ice-cream”.

Factually incorrect.  There was another verified maximum temperature above 40 degrees Celsius at Pitsford, Northamptonshire. 

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