A was for Austin, but now B is for Bedford

When moving, general deflection by tyre is downwards and out, plus the rotation of tyre draws it down too. While giving it a quick trial run it was noticeably blowing across the tyre and out while idling.

Note the exhaust on a local petrol tanker around here (Crystal Brook/Gladstone) . . . 

 

Sorry about the picture quality on this one. 

Not trying to be a smart arse but that photo is just someone's idea on a restoration or a local mod back in the day.

Just looked at a few ADR and CASA regulation sites and the rules say flow free and clear of the body and the latest ones require spark arrester mufflers or baffles. I remember as far back as the 60's the aircraft fuelling tankers had an additional spark arrester (about the size of a large coffee mug) on the end of the exhaust pipe. Car rules have always stipulated flow clear of the body.

The flow in the wheel well will certainly be swirling around backward and under the truck. The huge airflow coming in the front would hardly be touched by any friction created flow off the tyre tread.

Just worried that for the sake of a foot of exhaust tube you might avoid any unpleasant CO consequences. If you don't want to do that at least go to REPCO or pilot supply shop and get a couple of stick-on CO patches they use in aircraft, motorhomes etc to give early warning. CO is really insidious and is colourless and tasteless once it travels any distance losing the smell or sting of the petrol/diesel exhaust residue. How many people have died in tents, caravans and even in the back of moving campervans unaware of anything wrong.

Your truck to do with as you want but I don't want anything to happen to you.
 

 

Here is a sticker on line but you can get them at any airfield pilot shop.

 
 

Point duly taken Lang, damn maybe the muffler comes off again after all . . .  

Chrome clamp on extension like the lads used back in our day might do the job.
Roadworthy rules in 1970’s required exhaust beyond rear of vehicle body. Had to fit extension to many early Valiants to comply.

There must be a reason but why face the hot exhaust gas towards the tyre? I think I too would prefer it to be outside of the tyre width n facing down at least 

Folks
Carbon Monoxide gas creeps up on you, starting with light-headedness, like I used to get after 40 beers (ok, maybe not that many)
So, the story goes-Famous old-style Brit F1 driver Peter Collins (think it was him) started breaking the lap record, lap after lap.
He then pulled into the pits and said something was amiss.
Yes, CO was leaking into the car, but he still had the wherewithal to know he was getting reckless and was not stupefied by gas to ignore it.
Similar stories of cars with holes in the boot-sucking CO into the cabin somehow
Cheers

Just a few of many.

1/  The UK Air Accidents Investigation Agency has revealed new details about the plane crash that claimed the life of Cardiff City-signed Argentinian striker Emiliano Sala.According to the latest analysis, the 28-year-old had a large amount of carbon monoxide in his body, which also caused him and pilot David Ibbotson to lose consciousness.

2/ B.C. pilot killed in Australian crash was overcome by carbon monoxide, investigation shows

3/ The woman, 33, and her daughter, 7, and son, eight months, were overcome by carbon monoxide while travelling in their Ford station wagon on Sir Donald Bradman Drive about 6.40pm on Friday night.The young boy tragically died at the scene.

And from CASA

* Note  CO has very serious long term effects from regular exposure at levels not immediately noticeable

Carbon monoxide (CO) is a colourless, odourless and poisonous gas produced from partially combusted fuel within piston engines, then expelled through the exhaust valves. .Most piston powered aircraft get their cabin heating by directing fresh (ram) air over the engine muffler (silencer). Engine exhaust may also enter the cabin through inadequately sealed firewalls and wheel wells. .If a piston engine has maintenance deficiencies, such as a crack in the engine exhaust system, it can provide a route for CO to leak out of the engine into the cabin. .If you ingest CO at high levels it can cause:

• headaches, dizziness, nausea
• muscular weakness, incoordination, and impaired judgement
• increased pulse, rapid breathing, chest pain
• unconsciousness, convulsions, and death if not removed from exposure source.

Chronic exposure to CO can occur at comparatively low concentrations and cause:

• prolonged headaches and migraines
• insomnia
• personality disturbances.

People exposed to high levels of carbon monoxide can suffer from carbon monoxide poisoning.


 

I would go straight square cut pipe (after muffler) to at least, if not slightly past, the outer edge of the front tyre, like the Golden Fleece truck pictured.  That is of course just my opinion.

Brett.

Lang wrote:

A thing I always noted on refuelling tankers is the exhaust ran well out to the side. I suspect with it going into the wheel well like you have you will be getting stinging eyes and blue fingernails in the cab.

Might be wrong but I reckon a longer tail pipe might be worth the effort.


I 100% agree Lang, apart from that looking fantastic 


Paul
 

Thankyou Brett, at least something more than telling me what I readily understand; and no doubt that is the possible outcome Paul and cobbadog, cheers. 

However, as much as I appreciate your comments Lang, I am truly disappointed that if the course I was taking is in conflict with regulations why didn't someone make it clearer sooner? I had made it clear what I was intending to do over a month ago and no one had suggested it would be a problem.

I will deal with it, but more comments like 180wannabe's would assist me as I struggle on. Just building what I am building seems to ruffle some purists!?. 

That should open up some interesting view points no doubt . . .