ok heres one more question. Has anybody used jp-8 in a model turbine specifically in a p-80? just wondering the difference and if it is possible?

one question? why would you not check with your engine manufacturer??????????
or are you the guy with the turbine on a skateboard?
tom

Jet-A, Jet A-1, & JP-8 are all about the same except for the additives for anti-icing & anti-corrosion. JP-5 has a higher density for Navy ops and about the same additives. JP-4 & Jet-B are about 40-60% Naptha with kerosene since it has a lower and wider distillation temperature and is lower density (~6.5 Lbs/gal) than JP-8 (~6.8 lbs/gal). JP-4 also has the best anti-icing package. K-1 doesn't have any of the additives except maybe red dye and is a little more pure than bulk jet fuel. K-2 has a higher sulfur content more like jet fuel (Jet A). This is all out there online. I spent hours looking it up a couple years ago but don't have the URL's anymore.

I'd use JP-8 in my P-80. Are you getting it as waste fuel or fresh from a government installation??

Thud_Driver is right on about Jp-8. Pretty much the same as
JetA-1 with the addition of additive fuel systems icing inhibitor (FSII) or fizzies as we call it in POL (AF). One thing that you might want to watch as you burn JP-8 is discoloration around the exhaust. With the additive in JP-8 there is a problem with Coking. Basically JP-8 residue that may cause some fuel system problems. If you start to see a fair amount of discoloration from JP-8 you may want to go back to Jet A-1 for a few runs to clean out the residue built up in your turbine. AF now uses JP-8+100 in fighters to keep away from coking problem.

mark8860

Some quick facts here: www.jp8.org. I've burned K-1, and plenty of JP-8 in my old RAM 750 with no problems. If you closely monitor engine temps then you may notice a 10-20 deg c variance between the two. That's it.

Way to answer the question Badger41, if you didn't know, why did you bother with the remark? The guy just wanted a educated answer, not a snide comment.

He's getting grouchy because he has 2 weeks of summer left up there
I thought that response was less than polite myself

i will check with the engine mfctrer, i just wanted to post a forum first to see if anyone has done it, thats what the forum is here for right? second the only reason why i was asking is because i can get jp-8 for free by the gallons, and hey that could possibly be better than going to the local airport and paying right? fresh ;-) thanks all for the EUCATED answers, i am just an UNEDUCATED FLIGHTLINE MECHANIC on fighter jets

But EDUCATED enough to 'make the switch'.......:-)

Not sure if a unlimited free source of JP-8 is something I'd admit to. JP-8 is a mil spec fuel, we all paid for it somehow. :greedy: Just my two pennies.

Mark Basel

THE SWITCH,,,YELLOW. YESSS! ;-)

Hey mark i think you mighta took it the wrong way. not unlimited, and definetly not "FREE" just at a VERY reasonable amount. Later

Mark 88,
Before you go making assumtions, you might consider tons of jet fuel ends up as waste when fuel cell work is performed on aircraft. By reg it can't be reused and the govt has to pay huge bucks to dispose of it as Hazmat. Any legit use is better than ending up in a dump.

Well i nav you are VERY educated on how things are on a flightline. Every time an F-16 shuts down (pratt and whitney engine) Its fuel vent vents out close to a quart of fuel into a bucket. This is all discarded for no good use afterwords. So thanks for speeking up NAV. You da man

Probably am assuming to much here. My apologies.

I would add that some fuel can be returned to bulk storage as clean dry fuel and some cant it all depends on circumstances.

I Wouldnt want to use waste fuel what ever the source to fly models with, unless it was run through a filter separator to get all the dirt and water out. One less thing to worry about when flying a jet costing thousands.

Hey, Now that I have everyone hacked off at me I can proudly say I worked POL for 6 years and 10 years before that on F-4s for the Nebraska Air National Guard. Not a total dork about fuels just partial. :bananahea



Mark Basel


ps. POL stands for Painting, Odd Jobs and Landscaping

mb

Mark, you have a point. I got a riddle (sorta), since I pay taxes, and I work for the Federal Gobermant, does that mean I pay my own salary. It just ain't right dag nabbit! Cheers.