Bologna B738 short field T/O
Thread Starter
Bologna B738 short field T/O
Scenariao
Bologna night departure, runway 12, mist, possible fog patches further down the runway, lightly loaded (plenty of rows blocked off) . Held at start of runway, powered up for a few seconds to (full power?), then brakes off with a smartish leap forward.We didn't seem to rotate any earlier than normal but seemed quite foggy when we did.
There was a puff of smoke when the No1 engine was started after a long tow.
Question.
First time in many flights (with this operator) that I have had a 'short field' takeoff.
Why would this be?
Usually it is a rolling start from the hold or it is roll on to the runway , brakes off and then power up.
Bologna night departure, runway 12, mist, possible fog patches further down the runway, lightly loaded (plenty of rows blocked off) . Held at start of runway, powered up for a few seconds to (full power?), then brakes off with a smartish leap forward.We didn't seem to rotate any earlier than normal but seemed quite foggy when we did.
There was a puff of smoke when the No1 engine was started after a long tow.
Question.
First time in many flights (with this operator) that I have had a 'short field' takeoff.
Why would this be?
Usually it is a rolling start from the hold or it is roll on to the runway , brakes off and then power up.
Last edited by flyingtincan; 20th Jan 2011 at 09:51. Reason: better title
Thread Starter
Maybe I didn’t explain it too well. There was only a short delay but engines were spooled up much higher than I have seen before, held for a few seconds and then brakes off. I've done the same myself but that was in a Tomahawk on a short runway. Lots of noise lost of vibration. Toes off pedals, go like a rocket , keep it on the line– well, almost, it was a PA38!
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Flyingtincan
I fly for RYR, so I can lend a word or two about 738's, but I cannot comment specifically on your experience. I hope I help.....
There is no such thing as a "short field take-off" in Ryanair, the concept does not exist. By that I mean we do not have any procedures for runways under a certain length. We calculate required thrust for the runway and our weight, and that is what we use. There is nothing we do differently if we are operating well below the limits or right up to the limits.
What we do do (if you'll excuse my English), is a "static run-up" for ice shedding on the engine fan blades when the outside temperature is 3C or less, AND if there is visible moisture (wet runway, fog, rain etc). Instead of spooling up to 40% and hitting TOGA, we spool up to 40% for 3 seconds, then 70% for 3 seconds, before releasing the brakes and hitting TOGA. This procedure does not have any effect on the take-off distance required.
Is it possible that this is what you experienced?
Wally.
I fly for RYR, so I can lend a word or two about 738's, but I cannot comment specifically on your experience. I hope I help.....
There is no such thing as a "short field take-off" in Ryanair, the concept does not exist. By that I mean we do not have any procedures for runways under a certain length. We calculate required thrust for the runway and our weight, and that is what we use. There is nothing we do differently if we are operating well below the limits or right up to the limits.
What we do do (if you'll excuse my English), is a "static run-up" for ice shedding on the engine fan blades when the outside temperature is 3C or less, AND if there is visible moisture (wet runway, fog, rain etc). Instead of spooling up to 40% and hitting TOGA, we spool up to 40% for 3 seconds, then 70% for 3 seconds, before releasing the brakes and hitting TOGA. This procedure does not have any effect on the take-off distance required.
Is it possible that this is what you experienced?
Wally.
I'll second WW's assessment, although I don't work for RYR.
Sounds very much like ice shedding procedure, which is quite common during conditions of freezing fog etc.
You sometimes see this when the aircraft has been deiced, and some fluid has been squirted into the tailpipe. Also, when the aircraft has been idle for an extended period of time.
DH
Sounds very much like ice shedding procedure, which is quite common during conditions of freezing fog etc.
There was a puff of smoke when the No1 engine was started after a long tow.
DH
Thread Starter
Wally Wumpus and Doubel Hydro
Thank you for your replies - yes that explains it.
I recall it was quite cold, mist with maybe fog in parts, and damp but no actual frost seen.
Apron under aircraft (only) was wet - from de-ice ?? Or does the frenetic activity of a 25 minute turnaround make it sweat!
Thank you for your replies - yes that explains it.
I recall it was quite cold, mist with maybe fog in parts, and damp but no actual frost seen.
Apron under aircraft (only) was wet - from de-ice ?? Or does the frenetic activity of a 25 minute turnaround make it sweat!
