r-r gnome
If you can find any info on it, an acceptable compressor cleaner used to be crushed walnut shells( not the nuts), which would act as a good abrasive to clean the compressor and the chamber and turbines to give a power recovery.Sometimes reqd. a couple of cleans. Wessex engines also could give off sparks from carbon deposits( a bit alarming at night).If you have access to an `intrascope` ,you may find build-up in the combustion chamber.Dont try hurling sand down the intake as it glazes over the internal cooling ducts and turbine blades!!!! We used to do comp washes with a mixture of water(de-ionised) and avtur at idle on Whirlwinds, but you require a very good mixer and fine spray(mist), otherwise ` Pooof-Poof,` and a melted turbine !!!!!!!Going a bit further, if you are using a Wx electrical H-P cock, they take about 2 secs to open/close; if checking IGV opening/closing speeds,a special H-P dump cock is used, or use a mechanical one( off a W-Wind), as when the engine surges, as it will as the IGV`s are locked open, the ordinary H-P cock will not close in time to prevent a burned turbine; as soon as it surges, the TIT will be around, and off the gauge, before you can say `POOF` !!!!!!BE CAREFUL... Syc