|Quoting mouldypete (Reply 187):|
From mercure1 in the last thread:
"The latest bloomberg article has the following: "The Boeing 777 was carrying 49.1 metric tons (54.1 tons) of fuel when it departed Kuala Lumpur, for a total takeoff weight of 223.5 tons, according to Subang Jaya-based Malaysian Air."
Based on my own calculations, this would give it apprx 8hrs (480min) total range for this aircrafts vintage, climbing and then flying along at M.84/485TAS @ Opt FLs.
ZFW ~ 174.4t (payload ~25.4t)
OFF fuel 49.1t
The 777-200ER T892 will burn apprx 6.1t per hour on avg, at those wts and FLs.
VAMPI would likely be reach 82min after takeoff, via the DCT PIBOS R208 IGARI DCT VAMPI routing.
398min (6.6hrs) range from VAMPI @ 485KTAS = 3217nm . Heck thats almost to the Kerguelen Islands."
This fuel burn information Is very helpful.I've used mapping http://www.freemaptools.com/measure-distance.htm
to calculate the distance in km's (as opposed to Nautical Miles) from Kuala Lumpur Malaysia across the South China Sea to where ATC handover was to have taken place.I then tracked this back to the Strait of Malacca and across to an equidistant point between Great Nicobar Island and Banda Aceh Indonesia.It does not show the way-points as I wanted to simplify the process.It gave me a total distance of 1,562 km.
I then added that distance to the rest of the journey.This section is 4,655 km.I chose an endpoint of Diamantina Deep which is the deepest part of Diamantina Trench @ (7,000+ m).
Adding both = 6,217 km.
And yes, I know NTSB has already done the math in a more sophisticated way.But.They have not been forthcoming in terms of disseminating distances covered, and fuel burn figures to the Media.It's just been the 400kt and 450kt arc track.
I also plotted straight-line distance from:
Kuala Lumpur to Beijing = 4,365 km
Kuala Lumpur to Diamantina Deep = 4,244 km
Now I wanted to work out the 'overhead fuel load' that Airlines are required to carry as part of Civil Aviation Safety Requirements.
- percentage of time: typically 10%, i.e. a 10-hour flight needs enough reserve to fly for another hour.
- percentage of fuel: typically 5%, i.e. a flight requiring 20,000 kg of fuel needs a reserve of 1,000 kg.
Based on (percentage of fuel) 49.1 ton of Avgas at 5% would give a mandatory reserve of 2.45 ton included in the original fuel load of 49.1 ton.
As I'm not a Rocket Scientist, I need assistance with the next part:
I'd like to know what the likely fuel burn was?, using my original figure of (6,217 km) total distance covered by MH370 as outlined in my attached images.With that information, I'd also like to know how much of the mandatory fuel reserve was burnt,as there is nothing to suggest that MH370 'ran out of fuel'.
I know that by deducting the flight distance (Kuala Lumpur to Beijing) 4,365 km from the flight distance that MH370 actually ended up taking 6,217 km is approx 1,852km.
So my question is: What percentage of the fuel load is left?, as MH370 would have theoretically landed in Beijing 1,852 km before, at the lower figure.
Did you notice something also??.Why is 1,852 km the current distance that Search And Reconnaissance are now searching west from Perth?.
I also note that Diamantina Deep is not very far from the New Search location.
This link provides better insight into the new search location. http://upload.wikimedia.org/wikipedi...509px-Diamantinatopography.svg.png
I also provide a weather map, which provides wind direction.I chose Diamantina Deep as my reference point.It is located at 180 degrees and current wind speed is around 36 kph.I noted on this mapping that the wind has a North North West track.
I trust that this meets the requirements of a high quality post,and I look forward to your feedback.Thanks in advance.