Any question answered...

Still 47, unless they take a long time to deliver, in which case you might be 48

https://www.youtube.com/watch?v=ObpcGNCU944

Cheers dude! And that was a good joke, no matter that this lot will tell you

Depends which part of the shoe is most constraining.

Chris Packham advocates ferries as greener than flying. I have a hazy memory from childhood that it takes rather a lot of energy to get jet fuel from the oil pumped out the ground. This is rarely included as a factor in the equation. Ozone damage compared between diesel and jet fuel might also be more comparable despite the diesel being more smoggy....?
I’m not sure if this is a question or an answer!

https://m.youtube.com/watch?v=LxnbW3GzV_E

How hot does jet fuel burn?

So the argument is that bunker fuel is "greener" because they've not spent so much energy to refine it? :-/

Would you also factor in the related infrastructure? I’d assume there’s a lot more power consumption involved with the running of airports, but i wouldn’t know how that equates per person, per mile.

Anyone got a frame box by any chance? all my local shops don't have any... Willing to collect from most of North London, couple km from Archway N19 or bus ride or two at most plz

I takes a lot of energy to refine it and what is left as a byproduct can’t just be magicked out of our equations. Very soon the big ferries will operate on biofuel and then it will be much less debatable.

Very soon the big ferries will operate on biofuel

Is there an actual plan on this, or is it just what you're hoping? Because generally speaking, 'biofuels' aren't taking off at all, mostly because it's simply not possible to produce enough of it to cover the current consumption, never mind produce it in a way that is actually 'better'.

Overall it's not a bad idea to use them where they are a by-product, but that can't replace any significant percentage of current fuel consumption.

You won’t die but you’ll probably cry, I did when I did the Raid Pyrenean a couple of years ago. Hardest thing I’ve ever done.

It is a hope, but I have just read that red tunnel ferries are investing in this, so it is happening now to some extent. In Germany diesel at the pump is a minimum percentage bio. We are also not factoring in that petrochemicals are sustained by subsidies and if, hopefully when, the investment gets redirected bio will become more plausible. Long term, there isn’t enough oil.

and if, hopefully when, the investment gets redirected bio will become more plausible

Well.... not really. The problem is still that it simply uses too much agricultural land area exclusively to produce the biofuels. As I said, it's a fantastic thing as a by-product or in similar situations, but when you start essentially farming biofuels for their own sake, that brings a whole host of issues with it too.

Yes perhaps you are right, I’m not pretending to be an expert. I was imagining waste products not crops farmed specially being the main source material. You see large vans all over London collecting cooking fat. I asked once what their business was and they said they shipped to Germany. It seemed mad that that made economic sense.

I’m enthusiastic partly because my car runs on chip fat and I have invested a lot emotionally into it.

Give us a Two Wheels Good tomorrow, we’re in N16 and I’ll see if I can put one aside for you.

Ahem

That’s good right?

Sure, using chip fat for example is a great thing, nothing against it that I know of. But from an overall perspective, there isn't enough chip fat to go around. Still, of course, using what's there is good.

Indeed it is.
The majority of diesel-powered passenger vehicles have no idea they are using some bio-diesel everytime they fill up their fuel tanks.

Methanol as a marine fuel

Any advice for cutting a section out of the middle of an aero chainring? I got a cheap D2Z but it won't quite fit my Infocranks so had some advice from LBS to take a section out where the strain gauge sits.

Yes, but...

Currently, the methanol used on board the Stena Germanica – the only current vessel employing methanol in the world– is produced by natural gas synthesis, as is most of the methanol produced in the world today.

It might very well be a big improvement of what's used otherwise, but one always has to be careful in assessing where stuff comes from and what the downsides of its respective production are.

I agree,
which is why my link did not suggest 'bio-methanol'.
I believe the operators of large vessels will switch to methanol,
to reduce the NOx & SOx emissions from standard, (high Sulphur fuel oils).
Some are ordering new build vessels with twin fuel capability.

Potentially they are waiting for someone to devise a method of making bio-methanol from a waste stream, (say bio-digested post consumer food waste).

You can make methane (natural gas) from co2 and hydrogen. Doing so on an industrial scale is a (much) bigger challenge. I think spacex are looking at it, as a way of generating fuel (on mars and earth) for their rockets.