Hitchcocks Forum

Hi guys----- worried about your "main jets" setting-----bit too rich ?? Black smoke from exhaust a possible symptom ?? then have a look at this }-------- http://www.youtube.com/watch?v=q3v-PY3P ... re=related -------------------- Engines overhauled at Chennai?

Just a tad smoky, it is on start though, maybe wet sumping?

beats even watching the Vulcans at Scampton back in the day!

Wonder what size jets they run in that thing.

I wonder if they use LesH's technique for kick starting them?

------might be difficult as there's no Top Dead centre on a Gas Turbine ----------

I lifted this extract from Wikipedia re}--- water injection in gas turbines and it explains what is happening.----------- "The use of water injection in turbine engines has been limited, again, mostly to military aircraft. Many pictures are available of Boeing B-52 takeoffs which clearly show the black smoke emitted by turbine engines running with water injection. For early B-52s, water injection was seen as a vital part of take-off procedures. For later versions of the B-52 as well as later turbine-powered bombers, the problem of taking off heavily loaded from short runways was solved by the availability of more powerful engines that had not been available previously." -------------------- Odd,you'd have thought that it would be a white smoke as per a water-leaking head gasket on a water-cooled piston engine ??

JOHN R, ---this one's for you }----------- http://www.youtube.com/watch?v=b1Uym4RyPjM --------------