Drinkstrolley From , joined Dec 1969, posts, RR: Posted (10 years 1 month 3 weeks 6 days 19 hours ago) and read 2962 times:
Having watched a couple of Ryanair movements recently at my local airport, Bournemouth (BOH), I can't help but notice that the 737-200 which is still used by the airline for their route to Dublin smokes like a chimney when either on approach of departing, yet the 737-200 (of a similar age of 20/25 years) operated by Palmair European (European Air Charter) doesn't.
What's this all about, is the Ryanair in need of an oil change?
Geoffm From United Kingdom, joined Feb 2004, 2111 posts, RR: 6
Reply 1, posted (10 years 1 month 3 weeks 6 days 17 hours ago) and read 2934 times:
Different engines? Don't know. But I flew on a couple BRS<->DUB last month, and they were pretty old and decrepit! Half the no-smoking signs actually said "nicht reisen" (or something like that), so I'm guessing they were ex-German-owned planes which they hadn't bothered to update. No complaints with Ryanair per se, as you get what you pay for!
Mender From United Kingdom, joined Feb 2004, 248 posts, RR: 0
Reply 4, posted (10 years 1 month 3 weeks 6 days ago) and read 2865 times:
Couple of points.
1 The JT8D engines usually smokes compared to a newer, more modern engine. I am more concerned that the Plamair aircraft doesn't smoke ;0)
I'm sure you are seeing unburnt fuel smoke rather than oil smoke. It's probably more to do with fuel/air ratios, the difference between a new fuel control unit and an old unit (carburetor in simple terms) and the effectiveness of the fuel spray nozzles than anything else. Maybe the mod state of the fuel control or combustion cans are different between the two operators.
2 In my experience, You don't change the oil on a turbine engine - ever. It is normal for the engines to consume oil thus you just top it up between flights thus it never gets too old before it is burnt/consumed. Sort of a constant cycle. Think of it this way, your car shouldn't normally burn oil between services, therefore it gets old and needs changing. Because of the heat in a turbine engine you cannot use an normal rubber lip seal to seal the bearing cavities, so they use labyrinth seals which "leak" a small amount of oil throughout the flight. So it needs topping up every flight or two and thats why you don't need to change the oil every 12,000 miles.