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![]() "Alan Adams" wrote in message ... In message "Ewan Scott" wrote: Snip fair discussion. Rather than nonsense, just a different view. I know, but you can't have a debate when everyone agrees can you? I still don't see how you manage to go slower than the flow of the water when going downstream unless you are doing so deliberately or you are being blown backwards by the wind. Honestly, sitting in the Inazone waiting for others to catch up/ play on waves - and not in any eddy, I was slowly drifting downstream, but small twigs etc were floating slowly past at a faster rate. If we turn sideways to the current we drift even slower - gives more time to read approaching rapids. I'd find that a bit hard to believe. What will make a difference is wind/breeze. The twigs may have been going faster than the water because of wind, or more likely a head wind was slowing you down. In the absence of wind effects, a boat should travel at the same speed as the water. This is what I think too. I think the original discussion was over a comment that progress was slower downstream. I took that to mean that speed over the water was less when going with the current than against it. Thus 2kph current and 4kph boat speed = 2kph upstream, but not quite 6 kph downstream. This I find quite likely, as there's less incentive to push hard when going downstream. Also, in shallow water, bottom drag will be greater going downstream, as that is related to speed over the ground. This also makes sense, but in the context of paddling on the Thames, we are talking about deep water. David Kemper Getting worried because I'm agreeing with people. Oh, the shame..... |
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