BrendanS
Well-Known Member
why?
SLOW SPEED WITH STERNDRIVE
- Thread starter Alrob
- Start date
chuckaduck
Well-Known Member
Because they work I should know we spend lots of time at sub 4 knts on river and it does make a difference
BrendanS
Well-Known Member
and if the boat doesn't spend a lot of time on a river, and spends a lot of it's time on the plane?
Your world, whether talking computers or boats seems to be rather black and white, and doesn't seem to be much about reading what the poster has to say about the situation
Your world, whether talking computers or boats seems to be rather black and white, and doesn't seem to be much about reading what the poster has to say about the situation
ontheplane
Well-Known Member
When I was a kid we had a boat with an outboard on a canal - 4knts max
My dad made up a rudder, simply by using 2 sections of L shape aluminium, with two large vertical aluminium plates to make 2 separate rudders.
He then just thru-bolted them to the cavitation plate.
Worked a dream
However I would say that you don't want to leave them off if you are going above about 5/6 knts as they would play havoc - so you'll need to trim up the leg and take em off.
However if most of your boating is on the river - then I would try it - will make life a lot more pleasant!
My dad made up a rudder, simply by using 2 sections of L shape aluminium, with two large vertical aluminium plates to make 2 separate rudders.
He then just thru-bolted them to the cavitation plate.
Worked a dream
However I would say that you don't want to leave them off if you are going above about 5/6 knts as they would play havoc - so you'll need to trim up the leg and take em off.
However if most of your boating is on the river - then I would try it - will make life a lot more pleasant!
oldgit
Well-Known Member
The joys of stressdrives.
They all do it and unless you are really keen to spend money,just keep using the boat and the problem will miraculously disappear after a while as you start to correct the unplanned change of direction without even realising it.Its just like one of them trolleys at airports once you get used to sort of steering from the back it becomes second nature.
They all do it and unless you are really keen to spend money,just keep using the boat and the problem will miraculously disappear after a while as you start to correct the unplanned change of direction without even realising it.Its just like one of them trolleys at airports once you get used to sort of steering from the back it becomes second nature.
boatone
Well-Known Member
Re: The joys of stressdrives.
A remarkably erudite post from you Oldgit !
Obviously one of your more lucid days /forums/images/graemlins/grin.gif
A remarkably erudite post from you Oldgit !
Obviously one of your more lucid days /forums/images/graemlins/grin.gif
oldgit
Well-Known Member
Re: The joys of stressdrives.
One of our local dredgers has just gone past on its way up to the Thames. /forums/images/graemlins/tongue.gif
One of our local dredgers has just gone past on its way up to the Thames. /forums/images/graemlins/tongue.gif
PCUK
Well-Known Member
Re: The joys of stressdrives.
The answer is to have a small fixed skeg bolted to the centre of the hull right aft. This acts as a fixed rudder and stabilises the steering at low speed. It must be small enough to not adversely affect high speed running. If it is made of mild steel it can be cut down in place if found to be too large.
Cost is neglible, highest cost being the haul-out.
This will transform the low speed steering to an unbelievable degree.
The answer is to have a small fixed skeg bolted to the centre of the hull right aft. This acts as a fixed rudder and stabilises the steering at low speed. It must be small enough to not adversely affect high speed running. If it is made of mild steel it can be cut down in place if found to be too large.
Cost is neglible, highest cost being the haul-out.
This will transform the low speed steering to an unbelievable degree.
David2452
Well-Known Member
Because you have no keel or large rudder the hydrodynamic forces generated until you get a bit of a way on are not enough to keep the thing in a straight line (it will track true at high speed with little or no input from you), you will get used to it. We lived with just such a setup for 10 years and very quickly became accustomed and did'nt even think about it after a couple of months. But short of introducing a keel or large rudder (just a movable keel) you will not find anything improves the situation much.
David
David
duncan
Well-Known Member
Re: The joys of stressdrives.
give the man a coccunut!
playing with the drive by enlarging it, foils (yuk) etc won't change the basic premise that when you turn the wheel you are directing the stern - and everything in front of it is pretty free to react as it chooses from whatever forces are acting on it ie as cross wind, waves whatever.
If you are oing to spend you life on a river then a skeg is a possibility.
Personally I just relax a bit and the problem goes away. As said already (1) it's a natural phenomenon (2) you will get used to it after yor first hundred hours /forums/images/graemlins/laugh.gif
give the man a coccunut!
playing with the drive by enlarging it, foils (yuk) etc won't change the basic premise that when you turn the wheel you are directing the stern - and everything in front of it is pretty free to react as it chooses from whatever forces are acting on it ie as cross wind, waves whatever.
If you are oing to spend you life on a river then a skeg is a possibility.
Personally I just relax a bit and the problem goes away. As said already (1) it's a natural phenomenon (2) you will get used to it after yor first hundred hours /forums/images/graemlins/laugh.gif
DAKA
Well-Known Member
Next time you go out try asking everyone to sit still.
I had a Bayliner and at slow speeds I often found us heading for the bank side because our Labrador had moved to the other side .
As others have said resist the temptation to over correct.
I had a Bayliner and at slow speeds I often found us heading for the bank side because our Labrador had moved to the other side .
As others have said resist the temptation to over correct.
whisper
Well-Known Member
I fitted a pair of foils on an earlier, outboard powered boat and soon took them off again. They did make the boat plane at slower speeds but in a following sea they caused the boat to slew around horribly.
theguvnor
Well-Known Member
I bought my boat (26` single diesel & planning hull) with a Ruddersafe already fitted - discarded it in this winters service lift - no differance at all - well perhaps its now a touch quicker
