Stephen007
New Member
Hi I've recently bought the bruce roberts euro 1200 but it doesn't have the propeller and I need to know the size of it can anyone help
Bruce roberts euro 1200
- Thread starter Stephen007
- Start date
Tranona
Well-Known Member
Welcome to the forum
Much more information needed such as engine, gearbox reduction ratio, shaft size plus dimensions of the boat - waterline length, beam and displacement. Boats like this tend to be individually built so don't have a "standard" propeller.
Suggest you contact a specialist propeller manufacturer such as Clements Engineering, Hamble Propellers or Teignbridge Propellers in the UK. However if it is the boat for sale in France you may well do better finding a supplier there.
Stephen007
New Member
It's not the boat for sale in France
Sticky Fingers
Well-Known Member
Calling @JOHNPEET can you help?
Sticky Fingers
Well-Known Member
Also this would be better in the mobo forum. Have requested a move.
JOHNPEET
Well-Known Member
Hi Stephen,
I have an Almarine 1200FA which is very similar to the Bruce Roberts Euro 1200. My understanding is that the designers of both boats (Hans Alma of Bonito Boats in my case) worked in partnership prior to splitting and going their own ways.
Tranona has pretty much summed the situation up in his comment. These boats being built by a range of builders including some by home builders, will have some key differences which will impact on the choice of propeller. The key variances will be the choice of engine or engines, gear box ratio - although this will normally have been selected alongside the choice of propeller. The finished displacement of the boat is also a key issue.
In my case - I have twin engines of 145hp each. 17500kg displacement with full tanks. 2:1 reduction PRM500 gearboxes. Hull speed is around 8 knots and with 290hp WOT is calculated at around 12 knots.
The reality is that my boat is over propped with 21 x 23 4 blade props. This is a result of my self build and having to estimate the displacement prior to lifting the boat from its build site. During the lift, it was a touch under 16000kg on the crane.
With these props, I can make hull speed comfortably without any smoke from the engines and I’m happy cruising at this speed for a fuel consumption of around 5 litres per engine per hour. I could replace the props for finer pitch units in order to gain more speed, but more speed above hull speed, also means considerably higher fuel consumption. My engines would burn 36 litres per engine, per hour at WOT, so we have no desire to go there!
Do you know the displacement of the boat you have purchased?
If so, as Tranona has suggested, contact one of the propeller suppliers and they will help you out. There may have to be some estimating involved in order to make a choice. You can then run some sea testing and see what results you get. If necessary, at your next lift, you could have the props re-pitched by up to a couple of inches either way by one of the propeller suppliers and specialist. I can add another couple of names to Tranona’s list - FAL Propellers and Castle Marine, both have websites.
Hope this is of some help.
Post some photos of the boat and keep in touch.
I have an Almarine 1200FA which is very similar to the Bruce Roberts Euro 1200. My understanding is that the designers of both boats (Hans Alma of Bonito Boats in my case) worked in partnership prior to splitting and going their own ways.
Tranona has pretty much summed the situation up in his comment. These boats being built by a range of builders including some by home builders, will have some key differences which will impact on the choice of propeller. The key variances will be the choice of engine or engines, gear box ratio - although this will normally have been selected alongside the choice of propeller. The finished displacement of the boat is also a key issue.
In my case - I have twin engines of 145hp each. 17500kg displacement with full tanks. 2:1 reduction PRM500 gearboxes. Hull speed is around 8 knots and with 290hp WOT is calculated at around 12 knots.
The reality is that my boat is over propped with 21 x 23 4 blade props. This is a result of my self build and having to estimate the displacement prior to lifting the boat from its build site. During the lift, it was a touch under 16000kg on the crane.
With these props, I can make hull speed comfortably without any smoke from the engines and I’m happy cruising at this speed for a fuel consumption of around 5 litres per engine per hour. I could replace the props for finer pitch units in order to gain more speed, but more speed above hull speed, also means considerably higher fuel consumption. My engines would burn 36 litres per engine, per hour at WOT, so we have no desire to go there!
Do you know the displacement of the boat you have purchased?
If so, as Tranona has suggested, contact one of the propeller suppliers and they will help you out. There may have to be some estimating involved in order to make a choice. You can then run some sea testing and see what results you get. If necessary, at your next lift, you could have the props re-pitched by up to a couple of inches either way by one of the propeller suppliers and specialist. I can add another couple of names to Tranona’s list - FAL Propellers and Castle Marine, both have websites.
Hope this is of some help.
Post some photos of the boat and keep in touch.
Last edited:
Stephen007
New Member
Hi thanks for yr reply there is a plate on the engine most of it is in Japanese or China it does say yanmar &some numbers and letters which i can give i if need b
Seastoke
Well-Known Member
How do you buy a boat , without trying it.
Tranona
Well-Known Member
You need more than that. You need the specs for the engine - power and maximum revs at the very least, gearbox type and reduction ratio plus the design data for the boat. That will enable your supplier to calculate the best diameter and pitch plus number of blades to achieve the desired maximum speed. They will also ask for the diameter of the propeller shaft, the taper and keyway size and location so that they can machine the hub to fit your shaft correctly.
