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Shaft Brake Project:
Client name:
Project name:
Prepared by:
Brake duty:
Maneuvering
Shaft locking
Vessel Data:
Shaft power (hp):
This and the next value are the minimum amount of information required to size the shaft brakes and is generally suitable for most vessels. For larger or faster vessels filling out the remaining data fields will provide a more certain solution.
Shaft speed (rpm):
Vessel speed (knts):
This and the next value are used to estimate the vessel momentum. Vessels with fast and efficient hulls will require larger brakes.
Vessel weight (tons):
The vessel weight must be at the same condition as the speed. For example, if quoted speed is when empty then the weight must be also for an empty vessel.
Number of Screws:
Single
Twin
Triple
Quad
Propeller Data:
Three blades
Four blades
Five blades
Propeller diameter (in):
Propeller pitch (in):
Blade area ratio:
Propeller efficiency (%):
The propeller efficiency can be estimated from the previous data fields or entered directly.
Drive line inertia (lbs-ft
2
):
The drive line inertia can be estimated from the previous data fields or entered directly. It includes the propeller, shaft, coupling and gearbox.
Brake & Disc Selection:
Search Filter
No filter:
Minimize equipment cost:
'Minimize equipment cost' will limit offering to braking systems which will perform the task without any regard to pad or disc life.
Balance cost & performance:
'Balance cost & performance' will select the middle one third from all permissible combinations
Maximize performance:
'Maximize performance' will present brake systems that will maximize pad life and minimize disc temperature but may be too large for the application.
Disc options:
Select a disc
None
Brake options:
Select a brake
Grade 'G' will produce the highest torque whereas grades 'E' and 'C' may be required in high speed applications.
