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Originally Posted by 172_driver
(Post 10619529)
You're not shifting 62000 tonnes of payload for the price of 72 tonnes of fuel. Maybe 62 tonnes. And that's pretty poor bang for the buck compared to shipping (unless time is cruicial) Edit: If you actually meant 62 tonnes there was no need for decimals.. |
Originally Posted by Fire and brimstone
(Post 10619923)
Do you know how many trees you have to plant to offset just your cruise?
On edit: Using the available metrics, the air transport industry would need to plant out one million acres every year. In one state of Australia alone more than that has burned in bushfires and we are only a third of the way through fire season. |
1 tonne of carbon is surely not equivalent to 1.8 tonnes CO2.
Molar weight of carbon = 12 g. Molar weight of CO2 = (12 + 2 * 16) g = 44g. This implies 1 tonne carbon is equivalent to 4.4 tonnes CO2. |
Pipelines to LHR. I had meant to reply earlier, as well as the Southern pipeline, there is a feed from the North. The fuel storage and distribution at Buncefield, Hemel Hempstead feeds direct. This gives the airport diversity of supply. Needed when Buncefield went off line for an extended period following an explosion in December 2005.
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Later today I will be flying an international football team back from a match they're playing in Southern Africa to their home city in West Africa (a flight time of approx 9 hours in each direction) and thereafter ferrying the aircraft back to base in Northern Europe (a flight time of 6 hours, devoid of passengers, in each direction)... therein a grand total of 30 hours of flying (requiring only +63 tons of fuel... it's a VIP config 737 with only 56 seats - ergo it's rather light and therein 'frugal' ) all in order for them to be able to play a 90 minute football match. Next week I'll be ferrying down to southern Spain to collect a premier league team and fly them to Russia for them to play a match, thereafter take them back to Spain and then ferry back to base. Oh how I laugh when I go into a UK supermarket and am required to spend 5p to obtain a plastic bag.
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Originally Posted by marchino61
(Post 10620118)
1 tonne of carbon is surely not equivalent to 1.8 tonnes CO2.
Molar weight of carbon = 12 g. Molar weight of CO2 = (12 + 2 * 16) g = 44g. This implies 1 tonne carbon is equivalent to 4.4 tonnes CO2. You've made two conversions to make one. Plus not entirely sure what the obsession with weight of "carbon" is, surely it's the volume of CO2 that is the issue. I've never even weighed dry ice. Only reason to work out a molar mass to volume is to work out partial pressure. |
The customary units for carbon emissions is tons of CO2. In talking about passenger aircraft for comparison purposes, it might make sense to compare carbon emissions per passenger mile. In this case I think a modern aircraft at full load compares favorably to a passenger car with 1 or two passengers. A bus full of people will do significantly better, but a bus with three passengers does worse. For Electrified rail, the efficiency is higher again, but the calculation now has to talk about the efficiency of the fossil fuel component of the generating mix applying in the country of travel.
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Originally Posted by Australopithecus
(Post 10620101)
Interesting question. So a bit of research in the forestry tables suggests that one 20 year old pine tree has a carbon content of 1 tonne +/- 10%. That’s the equivalent of 1.8 tonnes of CO2. So to offset my year of 737 flying I have to plant 5,600 trees and wait 20 years. But first I have to plant another quarter million trees to offset just my previous flying. Well, that’s my Sunday gone... On edit: Using the available metrics, the air transport industry would need to plant out one million acres every year. In one state of Australia alone more than that has burned in bushfires and we are only a third of the way through fire season. If anything, we will need to cut down more trees to make the space, and provide building materials. OR, we could just build them, and offset our huge carbon footprint by planting replacement trees in Scandinavia, to replace the ones imported by ship to feed our building program. Naturally, all this will be done in a sustainable way. "Simples". |
Pilots, you're not scientists. Please stop pretending that you are - stick to what you're expert on and leave the real scientists to do their job.
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Originally Posted by jimmievegas
(Post 10620442)
Pilots, you're not scientists. Please stop pretending that you are - stick to what you're expert on and leave the real scientists to do their job.
BTW what's a "real scientist"??? |
Originally Posted by Old King Coal
(Post 10620220)
Oh how I laugh when I go into a UK supermarket and am required to spend 5p to obtain a plastic bag.
It is an attempt to reduce plastic pollution. It has been remarkably successful. We are a stingy bunch over here. |
There is a new rail service for fuel from Isle of Grain to Colnbrook agreed between BA & BP, but they are also moving the railhead and fuel connection at Colnbrook.:hmm:
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Originally Posted by jimmievegas
(Post 10620442)
Pilots, you're not scientists. Please stop pretending that you are - stick to what you're expert on and leave the real scientists to do their job.
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Originally Posted by jimmievegas
(Post 10620442)
Pilots, you're not scientists. Please stop pretending that you are - stick to what you're expert on and leave the real scientists to do their job.
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Chris2303
Why, when even the scientists can't agree |
Originally Posted by jimmievegas
(Post 10620442)
Pilots, you're not scientists. Please stop pretending that you are - stick to what you're expert on and leave the real scientists to do their job.
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Originally Posted by Ex Cargo Clown
(Post 10620227)
Why would you measure a gas in a mass unit? One mole of mass @STP is 22.4L.
You've made two conversions to make one. Plus not entirely sure what the obsession with weight of "carbon" is, surely it's the volume of CO2 that is the issue. I've never even weighed dry ice. Only reason to work out a molar mass to volume is to work out partial pressure. |
It depends who I google, but in Australia they talk about CO2 equivalents, and I see that they use a conversion of 1:3.67. In this dry country 15 trees are required to offset one tonne. (!) the planting density means around 100-300 tonnes per hectare at year 30. Not real good |
Originally Posted by TURIN
(Post 10620529)
Why? Adding 5p to the supermarket bill has got bugger all to do with offsetting CO2 in the atmosphere.
It is an attempt to reduce plastic pollution. It has been remarkably successful. We are a stingy bunch over here. |
Originally Posted by marchino61
(Post 10620118)
1 tonne of carbon is surely not equivalent to 1.8 tonnes CO2.
Molar weight of carbon = 12 g. Molar weight of CO2 = (12 + 2 * 16) g = 44g. This implies 1 tonne carbon is equivalent to 4.4 tonnes CO2. |
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