Ineresting situation when river in flood
Posted: January 10th, 2018, 4:56 am
So our river is in flood, currently the river is flowing at 5-6 knots. The speed limit on the river is 6 knots, So when running upstream you are fighting a 5-6 knot current, therefore to attain a 6 knot over ground speed your hull is actually running at 11-12 knot hull speed, now that's not a problem for my boat, however the wake you produce is the equated to the hull speed, not the over ground speed. even slowing to 4 knots over ground speed you are still producing quite a wake.
On our river we have a number of liveaboards who do not move, (state of their boats they will never move again, apart from vertically down). So on Sunday I managed to upset one or 2. Not only me thought, about 1/2 mile ahead was another baot with the same issue. To make headway you have to run to a given speed.
Returning down stream you have the opposite problem, tickover on my engines, and I was running at 7 knots over ground, but the hull speed through the water was 2 knots, zero wake.
Just food for thought.
On our river we have a number of liveaboards who do not move, (state of their boats they will never move again, apart from vertically down). So on Sunday I managed to upset one or 2. Not only me thought, about 1/2 mile ahead was another baot with the same issue. To make headway you have to run to a given speed.
Returning down stream you have the opposite problem, tickover on my engines, and I was running at 7 knots over ground, but the hull speed through the water was 2 knots, zero wake.
Just food for thought.