turbo diesel tractor or not???

[Doc_Bob]

I know from military experience JP-4 has more per gal, but for safety issues, civilian commerical aircraft are forbidden from using it, unless the law has changed?

The Army has switched to JP8 for the last few years. We no longer use JP4.
Bob

 

[Soundguy]

If you are dumping more fuel. then you have to dump more air.

Soundguy

My question to some of the gentlemen who believe the reason of intercoolers are for increasing molecules of air for increased HP; why wouldn't the manufactures save money by increasing the size of the fuel injectors only, and getting the same results?? I assume that others have done this to their diesel engines, and save money without damaging their engines? I know turbos are added for power and truly aid in higher altitudes for the same reason. Is the cost of a bigger engine/tractor greater than a less tractor with a turbo? Seems to me more weight would be wanted? What is the HP gain for the same displacement engine; turbo vs non turbo in % or net gain HP? Maybe the "chip route" to the tractor engine is possible as a money saving alternative also? I have not followed the tractor market for turbo engines on smaller tractors. Or are the manufactures targeting Colorado and the higher Great Plains region with smaller turbos?

 

[Soundguy]

The TWA B-747 that departed JFK enroute to Europe vanished in flight as a result of a kerosene fuel tank exploding without being compressed?? I believe kerosene and Diesel fuel have the same BTU content? I know from military experience JP-4 has more per gal, but for safety issues, civilian commerical aircraft are forbidden from using it, unless the law has changed?

I believe you know full well that we were talking about what happens in the combustion chamber.. not in an airplane wing. In the tractor we are talking compression ignition. I'll bet that airplane wing had a spark ignition...

Soundguy

 

[machmeter62]

The Army has switched to JP8 for the last few years. We no longer use JP4.
Bob

In the Navy in the 60's on the aircraft carriers it was JP-4, and I think that was the only jet fuel available for the Navy. The runway was **** short, and the added heat over the civilian jet fuel provided more power. It's been too many years, and JP-8 maybe an upgrade performance wise! If my memory is correct, JP-4 weighed 7.1#/gal?

 

[Doc_Bob]

It's been too many years, and JP-8 maybe an upgrade performance wise! If my memory is correct, JP-4 weighed 7.1#/gal?

I think all the services went JP8 for supply reasons.
One type of fuel makes it much easier.
Bob

 

[machmeter62]

I believe you know full well that we were talking about what happens in the combustion chamber.. not in an airplane wing. In the tractor we are talking compression ignition. I'll bet that airplane wing had a spark ignition...

Soundguy

It was the center fuel tank in the fuselage, and the FAA determined the last report I read, was heat caused by air conditioning compressors located near the tank with continous running to cool the a/c because of a long departure delay on the ground? I believe there was minimum fuel in the tank also? It is a detailed report, and the conjecture is still flying as to the cause of the explosion. The FAA recovered the center tank where the explosion occurred, but the last I read an electrical source was ruled out? Of course other theories, including a stray missle fired from an unknown submarine, bomb on board, and other stories still haunt the case.

 

[SkyPup]

Not to be too confusing, but what does that have to do with turbocharged tractors???

 

[machmeter62]

Not to be too confusing, but what does that have to do with turbocharged tractors???

Th discussion switched at reply #54, when he stated diesel is combustion, true; however, too much diesel is detonation=explosion in regards to fuel/air-- I'm getting confused also. This is going around in circles. Ether explodes!!

 

[machmeter62]

Is it possible for diesel fuel fumes to explode in a fuel tank without a direct heat source, and at what temperture. This may end the discussion. The tank is unpressurized.

 

[Soundguy]

Posible? Fuel vapor, plus 02 plus an ignition source shoud do it. ( ignition source = spark,(static discharge seems ok.. ) or flashpoint temps.. etc.. )

Soundguy