You guys running on diesel...........
09-04-2014, 01:07 PM
#3
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Yes absolutely.. Dont even bother with premium diesel.. We have a guy here in Canada that works high up in the oil companies and he says there is no difference between reg and prem diesel except that the Prem diesel has additives that are use for On-road vehicals. A few years back it became law in N America that all road worthy diesel had to lower its sulfer contents to 15PPM(15 parts per million). So in effect...5 years ago the reg diesel fuel we use now.... would have been considered Very Pemium fuel back then.
JetA could have as much as 500ppm Ships use 5000ppm
JetA could have as much as 500ppm Ships use 5000ppm
Last edited by Vettster; 09-04-2014 at 01:09 PM.
09-04-2014, 07:14 PM
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No ecu changes on rx motors to run on diesel. Mix 1 qt of oil to 5 gallons. That equates to about 4.5-4.7% oil. I'm running the jetcat oil. That's the mixture John told me to run. It's a little more oil than kingtech recommends.
09-04-2014, 11:44 PM
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NO you need to lower your pump start voltate or you will shoot out a lot of flames, also lower your acceleration speed and diesel does not accelerate as fast, BUT you get more overall power than kero/jetA so that makes up for it.
09-05-2014, 04:19 AM
#13
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Off road diesel has a much higher surfer content(500ppm vrs 15ppm for on-road) and there for could cause coking. Stick to On road fuel and you will not have to worry.
Last edited by Vettster; 09-05-2014 at 04:23 AM.
09-05-2014, 06:04 AM
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Hello Megafly
You can use Aeroshell as usual or Mobil Turbina 32 oil. I think you don´t need to change settings. I have running diesel is a P70 with no changes.
Celso
09-05-2014, 07:09 AM
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That's OK... premium diesel doesn't really exist in the USA. (Stupid) We only get crappy 40~45 cetane.
Falcon: Be careful with the TCW3 oils. Several turbine company's have changed their minds if it's OK or not. A lot of people are getting bearing gummed premature. I've switched to DTE, and it runs clean.
Last edited by Dr Honda; 09-05-2014 at 07:11 AM.
09-06-2014, 06:26 AM
#18
Update!
Flew on Diesel for the first time yesterday, 6 flights. Other than a bit of puffing during startup and idle, it was uneventful. Engine ran just as usual. The puffing went away after flying, pbly because there may be kerosene left over on my fuel tanks.
I can now by my TCW3 and diesel at any gas station. How awesome is that?
Flew on Diesel for the first time yesterday, 6 flights. Other than a bit of puffing during startup and idle, it was uneventful. Engine ran just as usual. The puffing went away after flying, pbly because there may be kerosene left over on my fuel tanks.
I can now by my TCW3 and diesel at any gas station. How awesome is that?
09-06-2014, 10:32 AM
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You will find that your top end increases dramatically. I put a GPS in mine with Kero in my Sprint jet. Took off full of fuel, did a long sweeping turn for a high speed pass with no dive and then half throttle for the rest of the flight. I got 168mph. I then did the exact same with diesel and got at top speed of 195mph!!
This is with my P-80se GAS start. I did not change any parameters.
This is with my P-80se GAS start. I did not change any parameters.
Last edited by Vettster; 09-06-2014 at 10:39 AM.
09-06-2014, 10:38 AM
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I started using kero on my K100g I then switched to Diesel and for sure had to change the perameters even more so than they suggest in the manual. But once done it started and ran flawlessly. This is only because it was Kero-start. Gas start engines dont need to be changed at all.
09-06-2014, 11:35 AM
#24
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I started using kero on my K100g I then switched to Diesel and for sure had to change the perameters even more so than they suggest in the manual. But once done it started and ran flawlessly. This is only because it was Kero-start. Gas start engines dont need to be changed at all.
So I guess I will continue to use jet a on my JC and diesel on my KT's. A pain in the butt.
09-06-2014, 12:14 PM
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Wren Turbines
King Tech
Jet Cat
Behotec
the common denominator on all 4, LOWER STARTING pump voltage because too much unburned diesel is sent to the exhuast, this results in a flame thrower. I think it may because Kerosene/Jet A don't require as much heat to burn so the combust fully in lower temps, but diesel requires higher temps. This is only an issue during start up, once the turbine reaches operating temperature deisel burns fine.
Another common issue is that acceleration is POORER with diesel, EVEN IN KINGTECH turbines (I know... I have owned 7 king techs and currently have 5) I think it is related to the same issue that the quick influx of extra fuel isn't burned quickly, but again as the the turbine stablizes it its fine.
So, for smooth running deisel settings do this:
Cut the pump start up voltage by 1/3, change acceleration to Slow or even very slow. Doing the above will ensure smooth running on diesel.
NOTE: as I stated, the pro of running diesel besides it being cheap is that you get more power at the top end, usually about 2-3% over kerosene.