Hopefully it is better than the Meuse. We are here in Revin in the Ardennes and the flow is mostly stopped, but on the past few mornings the river has actually been flowing backwards in the upstream direction.
Chris Rowling wrote: Hi all
When I run Nigel Orr's factors the results I get are about half of Paul's real life observations. can someone else check as that may give a user a false sense of safety.
I'm running up The Rhone this month, I'll make observations of conditions and published debits at as many places as possible.
I'll use still water speed of the vessel at a given engine speed as my datums.
This should give a accurate guide as possible at given flow rates, some extrapolation will be required for higher flow rates.
The following user(s) said Thank You: Bob Marsland, Chris Rowling, Tim Horchler
"the Deutz manual talks of a punitive 30 lts/hr at full throttle..."
That's about right for a 160 h.p. engine.
The saving grace is that you shouldn't be running at full power very much. Find an engine speed that the boat is comfortable with, about 75% fuel rack open and the hourly consumption will be halved and you will still make reasonable headway.
From experience can I make a couple of observations.
1. A typo error 10 kph = 8 knots.
This should be 10 kph = 5.4 knots
2. There are few places for larger barges to stop on route on The Rhone. The majority of ports are geared for 15m boats. Some can take around 20m. But for 25m +, mooring opportunity is rare.
3. When using The Rhone for transit it is quite acceptable to stop overnight at the waiting pontoons or Duc d'Alds at the locks, just ask the lock keepers where they want you, as commercial vessels pass 24 hrs a day.
I've heard it said that you have to feign engine problems to be allowed to overnight at locks, this is untrue.
3. Don't be tempted to moor on "hotel boat" moorings, thinking that they are vacant. They can arrive any time day or night.
4. Lock keepers will allow you to stop on the waiting moorings if river or wind conditions make navigation dangerous.
5.. In my opinion the fastest flow is encountered at the railway bridge at Givors.
Slightly faster than Beaucaire, but not a lot in it. There are pontoons to lie against to wait for the flow rate to abate slightly.
6. One I can't condone 😉 is going upstream at Beaucaire it is easier to pass under the railway bridge on through the downstream channel, i.e. on the wrong side. Care must be taken to see if anything is coming downstream. It's relatively easy to hold station below the bridge to wait for a clear run through the wrong channel. I of course would never do this, preferring the more difficult job of fighting to keep the bow into the flow to prevent the vessel being swung around either to port or starboard.
6. As said earlier in the thread, a debits figure of 800 ish and below is okay for leisure barges at Beaucaire, much above might be a struggle.
7. In the chutes where projections from both banks are indicated on the charts, you MUST stay clear of these often underwater walls.
The following user(s) said Thank You: Bob Marsland, James Newcombe, Tim Horchler
14 - 15 kph should enable you to make 5 - 6 in the chutes.
How many horses are you feeding?
30 lph would seem to be a Gert big engine.
A 30m we came up in with about a 180 hp used overall 19 lph from Aigues Mortes to Saint Jean de Losne where we bunkered for the second time, so that was about 300km on Rhone and 200 on Saône, with moderately heavy flow.
As a rider to my last, I remember watching a small tug pulling a construction barge under a bridge over the St Lawrence in Montreal. I watched him for at least 10 minutes, and he spent as much time slipping backwards as progressing forwards.
When Stanton Rose finally goes back in the water at Port-Saint-Louis in perhaps 3 weeks, I will be heading back up the Rhône myself. Would that there won't be heavy rains in the catchment prior to this - as diesel is now so expensive! With a clean hull and a newly repaired propeller, she should be good for 14-15 kph in extremis, but the Deutz manual talks of a punitive 30 lts/hr at full throttle...
I don't know if that is published anywhere, but I believe the VNF can provide a measure of it in cubic metres per second! I was moored there on the west bank for a few hours last October, but didn't want to stay overnight on account of the uncomfortable turbulence.