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Turbine Oil
Posted: Wed May 27, 2009 8:20 am
by sdennison
Have a friend building a garden tractor with a turbine from an APU and he needs some MIL-L-23699 oil or the equivalent.
Suggestions? Thanks,
Posted: Wed May 27, 2009 9:13 am
by Second Air Force
I originally thought this oil would cross to 2380 or 2197, but I don't see a cross for it. 23699 is used by Bell Helicopter, so check with the local FBOs or oil wholesaler. I'm going to be at my oil supplier this week and I'll check with him to see if he carries it.
Scott
Posted: Wed May 27, 2009 9:42 am
by sdennison
We found an older spec MIL-L-7808. Know what the difference is?
Posted: Wed May 27, 2009 10:25 am
by b29flteng
BP2197 meets Mil-l-23699. Any FBO can supply you with an oil that should meet that spec.
Posted: Wed May 27, 2009 10:33 am
by Second Air Force
sdennison wrote:We found an older spec MIL-L-7808. Know what the difference is?
23699 is the replacement for 7808, and, as B-29flteng just posted, your troubles are over as 2197 is easy to get.
As for your friend's project, a guy in Oklahoma built a zero-turn mower with an apu engine a few years ago. Interesting machine.
Scott
Posted: Wed May 27, 2009 10:41 am
by retroaviation
Mentioning these turbine powered mowers without posting pictures is just plain rude.
Gary
Posted: Wed May 27, 2009 10:50 am
by Second Air Force
I don't have anything on the Okie-grasshopper-jet, Gary, but here is a link to another version.
http://www.youtube.com/watch?v=zBJu2q3sDrw
(Do you suppose anyone would miss a spare Garrett that we just happen to have hanging in the airplane in my dock at work?
)
Scott
Posted: Wed May 27, 2009 12:09 pm
by Sabremech
Hi Scott,
There's a long list of oils that meet this Mil spec. Here's a short list of what you can use: Exxon 2380, 2379, 2197, Mobil Jet II, Mobil 254, royco 899 just to name a few. Exxon 2380 is the easiest to get I've found.
David
WHF Maint
Posted: Wed May 27, 2009 12:23 pm
by Second Air Force
Thanks for the full listing, David. I admit I was too lazy to really check cross references.
What do you use in the J-47 nowadays?
Scott
Posted: Wed May 27, 2009 1:19 pm
by Sabremech
Hi Scott,
We use Royco 481 which is grade 1010. At full power the oil pressure is barely 17 psi.
David
WHF Maint
Posted: Thu May 28, 2009 8:24 am
by b29flteng
retroaviation wrote:Mentioning these turbine powered mowers without posting pictures is just plain rude.
Gary
How about this...
http://www.marvinbaumann.com/typhoon2.html
Posted: Thu May 28, 2009 9:34 am
by Second Air Force
Once more proving the versatility of the little Ford tractor!
S
Posted: Thu May 28, 2009 11:54 pm
by RickH
Don't mix these oils ! They are synthetic and according to Shell Oil the esthers in them are not compatible.
MIL7808 meets an AF spec and is a 10 wt. The replacement is the MIL23699, it is used by everybody now and is a 5wt.
According to a GE report, the 7808 is better long term as an anticorrosive but the 23699 should give you longer engine life as it regards wear.
Most civilian oil cans list what MIL spec they meet right on the label.
We now run MIL 23699 in everything, J-79s, J-52, T-53, UH-1 transmission and all gear boxes. We also run it in our GTC-85 turbine AGE units.
Posted: Fri May 29, 2009 3:21 am
by Fouga23
That guy is just sick! A HOMEMADE turbine he bought on Ebay, no fire extinguishers, propane tanks right next to the turbine,... And I wouldn't come within 10 feet of that thing without being covered in Nomex! That's looking for an accident
Posted: Fri May 29, 2009 8:02 am
by Second Air Force
Did you watch the other videos of his "experiment", Fouga?
You're right, he's
Scott