Catania & Baggage
Hi,
On a recent trip to Sicily. We departed from Catania with all baggage (for the whole a/c)being left behind. Our a/c was an MD83. We were advised that our bags were being left behind because the temp outside was 38C and therefore all baggage needed to be left behind. I must admit I found this odd as I'm sure CTA regularly achieves daytime temperatures of 38C and above. I would love to get a technical answer to this. Is this norm? Regards and thanks Shamrogue |
Shamrogue,
It is a law of physics, that air gets less dense when hot and therefore as temperatures rise aircraft get less lift. Any aircraft will have performance charts for a particualr runway and as the temeperatures rise the aircraft will be able to lift less of the maximum take off weight from that runway. Then depending on the lenght of the sector to be flown, the crew may have a choice to make to either reduce the payload or ulpift less fuel and tech-stop en-route. |
Ahh now
Yer Man,
Good stuff. Yes indeed the laws of physics. This is where I'm trying to get a wee bit more technical in the answer. Catania's Runway is 8727 feet long, it's elevation is 43 Ft. The next sector was from CTA to DUB. (our flight). OAT was 38C. Our a/c MD83. Now I suppose my real question is, can the MD83, come off that runway, in that temp, with full pax and baggage plus fuel. And the reason I ask, is to get rid of the conspiracy theorists and the "hurlers on the ditch". If ye can shed further light on this I would really appreciate it. Thanks yer man. Slan Shamrogue |
An MD83 with a full passenger load, especially if majority were adults with few children, has no hope of taking a full bag load as well on that sector in those temperatures with little or no wind.
I don't have a DCS system available nor the aircraft weights etc. to work the details out but know from experience that the aircraft performance would require reduced MTOW. Decision between offloading bags and making fuel stop comes down to whether or not the carrier had an option to get the bags to DUB in reasonable time against the cost of a fuel stop (landing, handling, time etc.) GH |
This is where I'm trying to get a wee bit more technical in the answer. |
Outstanding
Guys
Thanks for the answers. Simple straight forward stuff which the public never really gets to take into account. Well done and thanks again. Shamrogue |
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