Greetings to everyone, I was trying to find administrators to reopen thread1083-462143 but as I couldnt, I made new tread as on of botton of thread1083-462143 says I can feel free to open new one. Anyway sorry for spam.
I have been trying to calculate steering effort on my hydraulic operated...
Here is a picture of connection...
Tiller arm is in offset to rudder blade by 90°
(In picture it looks more but rudder blade is not in middle position)
Referencing the thread thread1083-462143
How to find max pressure of hydraulic cylnder which is actuateing the ships rudder if my rudder surface is as seen from picture.
Firstly,
I found on online calculator and tried to calculate the stalling drag for ruder at 35 degrees and it gave me...
Wow this is extraordinary.Thank you for time, you put into this.
Just to confirm. Is this power needed on pump shaft, not on 1m, on ideal system offcourse?
Than:
Torque (N.m) = 9.5488 x Power (kW) / Speed (RPM)
= 9.5488 x 0.196 / 60 for 1 (rev/sec)
= 23.26 Nm=2.326kgm( * pump effieciency) +...
I messe up formulas for are, now I see.. I used 2rpi instead r^2pi
Inside capacity is 84 cm^3, stroke is 150mm which gives bore of 32mm(2r) >>rod diameter is 14mm(2r).
Area of rod 1.5386cm2 - A
Area of bore 8.0384 cm2 B
Effective area B-A= 6.5cm2
^^Force = Pressure*area = 70 bar (kg/cm2) * 6.5...
http://www.hydrodrive.eu/--our-shop--.php#!/MC50-Hydraulic-cylinder/p/70866274/category=20762559
There isnt valoe for bore at web, this is cylnder I want to buy. I cant find bore. But Bore x stroke should be capacity? Just like a car... 84cm^3 is for this one.
But allready it says output force...
I cant find inside diameter but capacity is 84 cc, stroke is 150mm which gives bore of 32 mm >>rod diameter is 14mm.
Area of rod 87.92cm2 - A
Area of bore 200.96 cm2 B
Effective area B-A= 113.04cm2
^^Force = Pressure*area = 70 bar (kg/cm2) * 113.04 cm2 = 7,912.8kg? Max force? But rod is only...
@akkamaan Thank you for time and effort, but system looks over complicated.Buying anything except cylnder is too expensive for me. For sure I am going to lok at it, google Danfoss pump as well. But I would rather modify my pump for force feedback( since I can remodify again, if I dont like it)...
On sailboats you cant find hydraulic stereeng except realy rare cases like mine, Usualy it is well calculated wire rope assembly with force feedback.
It is basicly not possible to stear 7 ton boat as it sailing 7 knots to brake arm or something mentioned since sailing isnt that fast.
As...
I wrote in the thread that I am considering to remove them, to get force feedback, at high speeds (max 7 knots) esspecially when sailing. [smile] It is ok to use rudder angle metter when sea is calm and quiet but ar rough sea you need as much feedback as possible to mentain direction esspecialy...
Hi to everyone, first I wil try to put here my current system, then what I would try to do and then couple of questions. This may be a big thread but my apopogies.
The current problem on my sailboat is that somebody before I bought it had putted hyrdaulic steering on 31 foot boat, and made...
