DesignMan

I don't have access to ether or amyl nitrate to do the experiment, so I need to ask. As I recall, gasolene has even more btu/liter than kerosene. Is there some reason we don't use it in model diesel fuel? I understand that there is danger of fumes being explosive with gas and not kero, but considering the ether, I presume the added risk would be minimal, and you sure can tell that something is leaking!

Motorboy

Use methylethylketone Peroxide as ignition improver, you find it as glassfibre hardener (polyesterbased glassfibre).

I am not sure what is Gasolene, but you can use Autodiesel, jet A1, lampoil, petroleum, kerosene.

Jens Eirik

DesignMan

Great tip on the MEKP. The druggies aren't on to that yet, so you can still actually buy it! I can get starter fluid that is mostly ether, so perhaps I can try my own mix afterall.

Gasolene is what we run non-diesel cars on. I don't know any other name for it, but most of what you specified are varying grades of Kerosene. On the other hand, I flunked chemistry, then scraped by with a D to get it out of the way. Not my thing, I guess.

AMB

I would guess you would have a bad pre-ignition problem . put gasoline in full size diesel engine
and you will destroy it instantly

John C

Actually, Diesel fuel has more BTU/gallon than gasoline, 132,000 to about 125,000. Disesl is rated with a Cetane number, higher is easier to autoignight. US fuels run in the 40-45+ range, European runs 50+ and they get all the good Diesel cars [:@] Gasoline is rated with an Octane number, which is its resistance to autoignition (why spark ignition is used) from hot spots in the combustion chamber.

For a variety of reasons, use Diesel/kerosene (effectively No. 1Diesel) in your model Diesel fuel mix.

Motorboy

MEKP reducing ignition lag and increasing Cetane, do not overdone to add more MEKP. Max 3%, to much MEKP making more hotter and detonating.

Ether helping to ignite kerosene cause ether has low ignition temperature at 370.4 F (180 C), kerosene/autodiesel about 482 F (250 C) make it difficult to ignite in our small engines.

Wrong, our european dieselfuel are about at 60 cetane..
I am car mechanic.

Jens Eirik

Jens, be nice, 50+ is not wrong, 60 is 50+, Thanks, Dave

fiery

My Feedback: (2)

"Gasoline" is called "Petrol" in most non-US English speaking parts of the world.



fiery

Willdo

Petrol ( gasoline ) would not be able to cope with the high compression ratios used in compression ignition engines, it would cause severe detonation.

DesignMan

Why could you not control this "detonation" with compression setting as is done with kerosene?

Motorboy

It is not problem to run dieselengine with gasoline instead kerosene. Mr. David-Andersen ran own dieselengines with gasoline in 1945-50 years. He wrote about it in his book about "Model diesel engines" where he used gasoline, white spirit (cleaner for paints) (kerosene and autodiesel too). He mixed in 1 part gasoline, 1 part ether, 1 part oil.

But gasoline are more dry than kerosene when i thinking about lubricating in moving parts.

Jens Eirik

Willdo

MOTORBOY, I stand corrected, obviously you have researched this more than I have. - I was looking at it more from an automotive point of view I guess.
Sounds like quite an interesting book, maybe I'll be able to find it and have a look sometime, most types of engines interest me, but it seems that there are quite a few facts I still don't know about model aircraft engines!

DesignMan

Surely Gasolene is not nearly as "dry" as Alcohol and Nitromethane, and glow engines use less oil than diesels, usually.

Motorboy

The book was wrote in 1945. But i has not tried it self in my dieselengine.

Jens Eirik

ACROHUNTER

MOTORBOY,

How much MEKP do you use mixed with Kerosene?

Thanks