TheSonntag
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Turbulence In Croatia - Dangerous?

Sun Dec 11, 2005 9:26 am

Today I did a daytrip to RJK on a HLX 737-700. Before we landed, we encountered extreme turbulence. I know that pilots have another definition of "dangerous" turbulence than ordinary passengers like me, but obviously even the flight crew found it rather bad, as they said in the evening ("There are 4 passengers onboard that came with us here in the morning, and I could understand if they chose never to fly again... But turbulence will be less severe now").

I read that a Tu134 crashed there in the 70s. These fall winds (boras) obviously can get very strong.

My question is, how dangerous are they? Obviously we landed safely and the flight crew certainly wouldn't even have tried if it was dangerous, but is turbulence an issue in Croatia?

Michael
 
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Starlionblue
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RE: Turbulence In Croatia - Dangerous?

Sun Dec 11, 2005 11:23 am

Quoting TheSonntag (Thread starter):
Today I did a daytrip to RJK on a HLX 737-700. Before we landed, we encountered extreme turbulence. I know that pilots have another definition of "dangerous" turbulence than ordinary passengers like me, but obviously even the flight crew found it rather bad, as they said in the evening ("There are 4 passengers onboard that came with us here in the morning, and I could understand if they chose never to fly again... But turbulence will be less severe now").

What is extreme? As you say pax definition is not official definition. What may make pax scream could just be another day at the office for the pilots.

As for danger, turbulence is very rarely so powerful as to pose a danger to the aircraft, unless said aircraft is flown into a thunderstorm.

Plenty of areas have a lot of turbulence. I imagine the Balkans have Adriatic air meeting central European landmasses with the Alps thrown in for kicks. So there is added fun. But lifting up in clear skies without wind is risky without preparation  Wink
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dc863
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RE: Turbulence In Croatia - Dangerous?

Sun Dec 11, 2005 2:01 pm

That crash was the result of an Aviogenex TU-134 making a last minute correction coupled with a wind gust just seconds before landing at Rijeka. I've flown to Zagreb many times and often have more turbulence flying over the Alps prior to entering Croat airspace.
 
Fly2HMO
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RE: Turbulence In Croatia - Dangerous?

Sun Dec 11, 2005 3:09 pm

Too much turbulence and too strong turbulence is dangerous everywhere, but I have to say mountainous areas have got to be the worst in strength and frequency. What does the topography around RJK look like? (I'm too lazy to search, its past my bedtime!  tired  )
 
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TripleDelta
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RE: Turbulence In Croatia - Dangerous?

Sun Dec 11, 2005 5:28 pm

Quoting FLY2HMO (Reply 3):
What does the topography around RJK look like?

RJK is badly positioned. The required previous 10 year's worth of wind data had not been properly researched prior to building the airport, leading to a wrongly positioned runway which causes these effects. It's one of the trickier airports to land in Cro, especially during the seasonal "bura" wind, that blows from approximately 030-060 heading at around 20-80 and up to 100 kts in it's high season.

RJK itself is located very near a steepish mountain side, so up- and down- draughts from it, as well as the tunnel effect between the islands, add to the difficulties. I flew a Reims Rocket there once, and keeping the CDI needles centered on the RWY 14 ILS was a challenge   . The bura itself is a common problem at all Croatian airports, and you'll see some of them having RWYs built right into it (ZAG, SPU, LOS, ZAD).

EDIT: less than a month ago, a parked An-2 was overturned by wind at RJK, despite being tied down...

[Edited 2005-12-11 09:39:00]
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Grbld
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RE: Turbulence In Croatia - Dangerous?

Sun Dec 11, 2005 7:54 pm

"Severe turbulence" is what happens when you actually get thrown out of your seat if you do not have your seatbelt on. And not a momentary drop so you feel that rollercoaster feeling in your stomach, but actually hitting the wall or ceiling with your head.

Anywhere where there are mountains combined with strong winds, you'll have turbulence, sometimes severe. The Bora is one of those situations.

Grbld

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