gas petrol diesel paraffin

[jimi]

Petrol my arse its paraffin

Ach Ah reckon the silly sodz hae bin drinkin' it! Thatz whit thon daft taffs get up tae when they cannie get haud o' sheepdip. It's thon scrapie ye ken!

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[Heckler]

send us a bottle of sheep dip

and i'll shut up, the real stuff mind, used to sell it in my local wine bar, made up your way somewhere.
stu

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[stubate]

Uhhh!

where has he come from? certainly knows nowt about engines
s

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[richardandtracy]

Cooking Oil

'the prob lies in that if you expose it to air it oxidises and forms a sticky jelly substance, look at your chip pan'

Stubate, there are a couple of things going on here.
Cooking oil doesn't oxidise at room temp very fast. It's bacteria that turn it to jelly at room temp, but the oil needs to be wet - just like bad diesel, and it doesn't happen very fast.

In your chip pan, you add bags of pus (sorry potatoe) and heat. If the water isn't driven off by high temperatures you get a chemical reaction between the water & the oil. This is saponification - basically you're creating a form of soap. That's why inadequately heated chip oil tastes rancid and makes lousy chips.

However, if you heat the oil too much the molecules in the oil can do one of three things (ratios dependant on the actual oil used):-
1) Burn
2) Break apart into more reactive smaller molecules, possibly boiling off.
3) Cross link to form a greater molecular weight polymer (jelly?)
None of the above are any good for either chips or engines. Use this as fuel in your waste engine oil burning heater.

Regards

Richard


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[stubate]

i luv you all

and i am sure you all think you are v clever, however you wouldnt cook many chips at room temp !! the chip pan analogy was used to illustrate a point, the oil gets hot when you light the fire!! and oxidises around the edges and forms a jelly like substance which clings to the edges of the fryer and slowly gets harder just like paint.
I have owned a restaurant up until recently. the cleaning of the deep fat fryer was the little cross i had to bear as part of it !!

water, potatoes etc had nothing to do with it, THE BLOODY OIL WAS OXIDISING cause it was getting pigging hot, in fact very pigging hot. 375deg F in point of fact water boils off at 212 deg F so there wouldnt be any water in the fryer would there?
i can tell it isnt tracy who wrote this, she would know all about rapeseed cooking oil (thats the yellow stuff you buy in the supermarket for cooking with) and how when you cook with it it forms a sticky edge around the pan and if you cook with it in your beneteau 351 it forms a sticky residue on the hand rail above the stove, its called OXIDISED OIL and rapeseed which our brussels masters have forced us to use is the worst culprit
stu

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[johnneale]

I heard a story that the Russians developed a multifuel engine and used it on aircraft just after the 2nd world war - It was reputed to be able to run on diesel, coal dust, or even finely shredded wood chips. Does anyone know it this was true, or what became of it ???

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[stubate]

brylcreem

i heard the the same thing about british tanks with rolls royce engines that would run on butter, marge, or even brylcreem. all theoretically possible but i suspect it was an urban myth
stu

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[johnneale]

Multifuel Engines etc..

I heard many years ago that the Russians developed a diesel engine just after the 2nd world war, that would also run on coal dust, and even sawdust and was used to power aircraft... Has anyone heard of this and what became of it ??

Also I know its bad form to use easystart on a reluctant brute, would it be better to give it a squirt of paraffin or even petrol in the air intake before the battery goes flat ???

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[vyv_cox]

Re: Cooking Oil

I thought the idea of putting fuel in an engine was to burn it = oxidise it? CH2 + O2 = CO2 + H2O (can't be bothered to correct the oxygen atoms) yes?

Based on gas turbine experience, the problem with burning unorthodox fuels is that the burners/injectors coke up very quickly because in their immediate area the temperature is high but the air flow is restricted. I guess that cooking oil might work for a while but gums would accumulate rapidly. Vegetable lub oils like Castrol R cause massive gumming, engines run with them needing stripping fairly frequently. I've no idea what the calorific value of cooking oil is but it seems unlikely to approach that of diesel.

Diesel differs quite a bit from petrol, in that it is intended to have a low auto-ignition temperature and a high flash point, whereas petrol is blended to have a high auto-ignition temperature and a low flash point. Else it would pre-ignite.



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[Mirelle]

Dr Diesel's original engine was intended to run on coal dust.

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[Guest]

Easystart ....

MY Perkins has for years had Bradex squirted into the air-intake .... even engineers said that she would be hard to start without it ......

Fitted a replacement cold start with glow plug and diesel feed. Despite all those years of Bradex ... she started first kick like a good'un. AND she didn't smoke so much for the first 5 minutes. Unfortunately I broke the cold start and I;m temp. back on Bradex ......


<hr width=100% size=1>Nigel ...
Bilge Keelers get up further ! I only came - cos they said there was FREE Guinness !

 

[Guest]

Re: Multifuel Engines etc..

During First Gulf War ..... I was involved in the supply of fuesl to the US and UK forces ..... from Saudi refinery's.

US wanted clean Kero for the MI turbine tank engines.
UK wanted all the crappy rubbish diesel etc. for the Chieftains .....

I was told that the Chieftan engine was multi-fuel and could run Petrol, Diesel or Avtur/Kerosine ......

Anyway - I shouldn't start a rumour but a few M1 tanks fell by the wayside due to blocked filters / sand in the works etc. !! Chieftans just plugged on by ........ I wonder how they are now in GW 2 ????

<hr width=100% size=1>Nigel ...
Bilge Keelers get up further ! I only came - cos they said there was FREE Guinness !

 

[Guest]

Coal Slurry is a ships fuel ....

Not so long ago - after the Oil scare of the 70's ..... Motor Ships were investigated by various engine manufacturers to run on slurry instead of heavy fueloil. It worked as well. Only trouble was the high sulphur contents.

Now the ships fuels are often mixed with various other bits and pieces such as Shale Oil ..... a sort of light bitumous / fuel oil type extracted from oil bearing sands / shale.


<hr width=100% size=1>Nigel ...
Bilge Keelers get up further ! I only came - cos they said there was FREE Guinness !

 

[Guest]

Bio Diesel is fully compatible with

most diesel engines .....

<hr width=100% size=1>Nigel ...
Bilge Keelers get up further ! I only came - cos they said there was FREE Guinness !

 

[Guest]

Re: not quite right ... DUH ..

GasOil is the correct industry name for basic diesel stock ex refinery and has nought to do with Spain, Portugal or France etc.

<hr width=100% size=1>Nigel ...
Bilge Keelers get up further ! I only came - cos they said there was FREE Guinness !

 

[Guest]

Re: No, sorry, that was the E and F series

Now to bring this down to minute levels ..... small model airplane engines designed for methanol mixes and glow-plug ingition can be made to run on a mix of ether based fuel and straight diesel ...... it works - I was involved in experimenting this many years ago - we used model engines as example engines to prove it. Blew out glow element in first run though !!!


<hr width=100% size=1>Nigel ...
Bilge Keelers get up further ! I only came - cos they said there was FREE Guinness !

 

[Guest]

Common trick nowadays ....

Up to 2% kero in diesel to stop clouding .... also reduces the freezing point slightly.

Many people advocate petrol in diesel ........ me ? I pinch a bit of additive from my stock !!

<hr width=100% size=1>Nigel ...
Bilge Keelers get up further ! I only came - cos they said there was FREE Guinness !

 

[Heckler]

oh no here we go again

if you had bothered to read the post and digest it and if you could speak french, portuguese and a little bit of arabic like i can you would under stand that gaz huile is french for gas oil, and gaz oleo is portuguese for gas oil, the point i was making is that the majority of people call it gas oil because that is what it is.
wahed tela tin, punyeterra,
and if you were clever enough to speak three languages you would understand what the previous means
s


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[Heckler]

and any one who professes to know about engines

and then confesses to and even advocates the use of easy start is a bigger wahed tela tin than i thought!
s

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[Heckler]

general rule of thumb

the "heavier" it is the bigger bang for your buck. i would imagine in point of fact that it would hav a higher calorific value than diesel
s

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