We used to do this to the A-10's all the time. The gun gas would get into the engines and coat the compressor blades, which would reduce the available engine power. When it fell to 95% the engines would get washed out.
@@_monti142 i’m sure he means the carbon and other chemicals released from the propellant of the Gatling gun when fired. Smoke goes back into engines and coats the compressor in carbon, thus reducing efficiency anddd engine power.
keep in mind also that tiny dust particles of silica can melt and fuse to the blades, causing inefficiency. A jet flying thru volcanic dust in Indonesia had an engine internally coated with melted silica, that stole a lot of the power of the engine. Fortunately the engine wasn't damaged enough to fail in flight. This is why when that volcano erupted in Iceland all the airliners stayed away from that air laden with volcanic dust. It melts and the spinning coats it with a glass like substance, similar to the way a cotton candy machine works.
I remember that particular aircraft because British Airways were doing cabin modifications for their new dusk services between the UK and America and were installing bed tubs which allowed for seats to electrically turn into a fully flat bed with entertainment systems. G-VIIR was the 100th aircraft in the fleet to have the mod done and everyone who worked on it, got an engraved chrome key ring with a personalised tin box. I worked as a cabin fitter helping to remove the old interior, carry out structural inspections and the help fit the new interior and seat coverings. Was a great aircraft to work on.
Normal day in the life of a helicopter pilot too. Bleed valves blocked, igniters off, introduce soap, spool to 10/12% N1, rinse is same procedure with distilled water. Remove bleed blocks, igniters on, normal start, spool to 100%, remain for 5 minutes, exercise the anti-ice valve/valves, anti-ice off, normal cool down. If you fly over the ocean every day to drilling rigs, etc, this is done daily. 👍👍🇺🇸🇺🇸. Fair winds friends 🙏
Washing my GE90 I alway use baking soda, I learned that from my grandma! I use the GE90 for to pull my eight-furrow plough. Works fine, an acre is done in 1.2 seconds!
I’ve been doing these engine washes for years with different engine wash equipment. We wash 2 engines per shift, GE, Rolls Royce, CFM56,737max LEAP ENGINE, V-2500 a-320, Pratt Whitney. 787 genex engine. We do it with a team of 2 people.
People who've never worked on aircraft don't realize how dirty they get, to be efficient an engine has to be clean. They're just motoring over the engine not starting it. They pull the fuel circuit breaker so the engine won't start.
+coderodion A lot of people don't realize how much power those compressors take to run. Look at a Alison 250 turboshaft.The compressor is the size of coffee thermos and takes 2 thirds of the thrust generated to run it. That works out to about 800 shaft hp. Tiny little engine. Without the gearcase, easily lifted by hand onto a bench.Now imagine one of the big ones...
In 1989 I worked at JFK (NYC) and had to was the belly of the DC 9 with a very long mop like kinda washing your car with a brush at the end of pole. It was tiring but I had a lot of fun cleaning the aircraft.
Gaspath wash using the Juniper rig requires disconnection of EEC sense lines and post wash engine ground run. It consumes fuel and takes too long to perform task. It is easier to use Lufthansa designed spinner wash rig. It does not require to disconnection of EEC sense lines and post wash engine run-up.
Cleaning the burners and the turbine section is an essential part of engine maintenance. During normal operation soot builds up on the sections of the engine. The increased thickness of soot restricts heat transfer causing internal temperature to run higher than designed. This could contribute to uneven turbine temperatures in multi engine aircraft seen on the flight deck computers. All thermodynamic machines need to be clean to work as designed.
I believe the mat is to capture what ever comes out of the engine. If pieces came out that would be a problem and it would be nice to know that. There is no EPA in the UK so I doubt that is the issue, they are looking for pieces. The other thing that they may do is send the wash out to a lab to see what is in it. if there was any contaminants, sand, oil, what ever.
Hi Juniper, can you advise what is the part number of that matting unit rig which rolls out and in the water collecting matt? We would like to order one. Thanks
