aquaskiman

My Feedback: (46)

I tested my new K140E today on kero and diesel. This is what the numbers were. Very interesting.

Diesel idle 528c PW 056 Thrust 1# 4oz
full 614c PW 261 Thrust 25# 14oz

Kero idle 534c PW 055 Thrust 1# 2oz
full 612c PW 268 Thrust 25# 10oz

So I lost about 17.33% at 7400 ft alt that is real good most lose around 20 to 24% difference between kero and diesel is 1%
George

Meesh

My Feedback: (135)

No much difference between the 2 fuels. I just wonder if the diesel will crap up the internals quicker than Kero.

Did you add oil to the diesel?

powerjets

My Feedback: (1)

Is that 25 lbs at full power ?

FenderBean

You get more power with diesel, this is why im going to give diesel a try plus its much easier to get. I bet at sea level it would pretty good.

Meesh

My Feedback: (135)

25 lbs at full power but at 7100 above sea level! You would have a hard time breathing at that altitude if you were not accustomed to it.

marquisvns

Thanks for sharing your data George! Your numbers concur with ours in using Diesel. At sea level, the difference is even more prominent. All in all, Diesel is more efficient, and talk about convenience!

Cheers,
Barry

marquisvns

You are right, not as much at 7400ft, but there's still that edge with Diesel. No, the internal will reveal comparable with Kero and Diesel in our engines. Yes, you'd still need to add 3 to 5% oil to Diesel.

Barry

FenderBean

When I get mine running next weekend I will see what my thrust is here, im about 100msl and temps are 70s 30% humidity on average.

rolsen12

Did you ever see the big fuel filters that they use on diesel trucks? There is a reason for that, Diesel is got a lot of junk in it....

aquaskiman

My Feedback: (46)

Yes I had oil in the fuel. Berry says that diesel is fine in the Kingtech. I am going to give it a go in this turbine.
It will be interesting to see what kind of thrust the 140 has at sea level. I saw one on you tube that was putting out over 32 lbs of thrust. I am very happy with 25lbs 10oz to 14oz thrust at my 7400 ft alt. George

marquisvns

Not true what so ever,
I have been running diesel for the last few hundred gallons and I can not find a spec of junk you are talking about in any of the filters, not even the one that's on the filling can and never had to clean it since day one.

Barry

PaulD

My Feedback: (39)

That pretty much applies to any bulk petroleum products. You'd be amazed how much crap is in typical oil drums. All of the oil and diesel we use for transmission and engine testing at work gets filtered before we use it. We just have tooo many problems if we don't. I think this is part of the reason aviation oils and fuels are more expensive as well - you're paying for the extra refinement/filtering.

PaulD

marquisvns

I also have one of those magical funnel filters but ceased to use it, because I could never get it to filter out anything, so I just pump and go!

Guys, if you haven't tried Diesel your own self, I encourage you to have a more open mind about it, but then if you are happy with kero, stay with kero.

Perhaps it really is a cleaner regular pump Diesel here in California and Taiwan, as well as Arizona, because we just burned through 25 gallons at the DJS with no issues and there are recently more Diesel burnin KingTechs across the states and haven't heard anything adverse with their operations.

Cheers,
Barry

FenderBean

I can tell you for a fact aviation fuels are extremely dirty, I take fuel samples everyday when I fly plus I use jet a and its just as dirty.

ModellbauUK

When using diesel is the turbine added at the same rate. What % 

EDFCrazy

If anyone crashes a jet with diesel on board, do you think there would be alot less chance of a fire using diesel vs Kero ?

Meesh

My Feedback: (135)

Modellbau UK

See post #7

DominicM

Has to be said that is a VERY interesting point. Don't know the answer but I was always under the impression from what I'd read that it was difficult to ignite diesel.

Roger Shipley

My Feedback: (35)

I don’t understand the dilemma regarding fuel contamination!

No matter the fuel type, Kero, Jet A or Diesel, nor the source some where along the line you will get contamination.

So surely everyone filters the fuel from the supply tank to the model and from the model to the pump……..

Anyway does Diesel start just as well as Kero for the “F” (Kero start) versions?

EDFCrazy

Thanks Dominic, I wonder if anyone has ever had a fire after a crash when using Diesel fuel instead of kero. If there was an increased chance that you would get back more parts after a crash, then id make the switch over to diesel.

BTW, have you had a chance to run your K140 in your Futura yet?

FenderBean

Roger, a guy here at club has diesel it starts just fine. Im going to give diesel a try see if I notice anything.

Meesh

My Feedback: (135)

Diesel is probably fine but I just feel that Kero is cleaner and doesn't smell so bad if you spill some, in the car or on yourself.

The price here in the northeast is pretty close. I get it at the local gas station and run it through my Mister Funnel before it gets into my 5 Gal. containers. It is then filtered by my fueling station before it makes it into the plane. Never had a problem with dirt or water.
If for some reason the Kero was unvailable I would definitely go to diesel. It doesn't smell as bad as JetA.

Bob

KC36330

the one reason i don't like the diesel is the smell out the exhaust, it's a very sickening smell to me, much worse then diesel truck exhaust.

the one local that Fender speaks of i did the initial flights on and it preformed great. the diesel here in Alabama isn't as refined as it is in the higher emissions regulated states (California...) and you get a slight smoke trail behind the turbine in flight, for those of us used to Jet A you'll think you've flamed out when you pull hard Gs and the smoke is more noticeable.

around here the cost difference is about $1.30/gallon

marquisvns

Now that's one test I would shy away from doing : )

But it definitely seems logical that diesel would be a less flammable fuel during a crash. A couple of months ago I had a fire in my van (LiPo related). The fire burned itself out due to lack of oxygen (windows were shut tight) But the fire did catch onto my Jersey filler can and burned a big hole but no Diesel leak. In this case, the smoldering fire on the can was extinguished by the Diesel, since that smoldering stopped at the exact line of remaining diesel.

Diesel also a safer fuel? I would say yes : )

marquisvns

Hi Roger,

Actually no, it is more difficult to dial it in, but in most cases can be done, otherwise, propane would be the way to go.
Here it is:
http://www.rcuniverse.com/forum/m_10961840/tm.htm

Let me know if I could help any...

Barry