Hydrobus
DESCRIPTION
High Speed river and sea transport.
It behaves like a floating body (Froude) in the harbour and like a submerged body (Reynolds) when it is moving at high speed.
It uses negative buoyancy to sink in a controlled manner, reducing its floatation line and its resistance to drag.
A low centre of gravity, as its engines, the fuel and the ballast are contained within the floatation, traction and buoyancy units.
Aerial passenger compartment with an elliptical design, with minimum resistance to side wind, which minimises veering.
Light structure made of aluminium or reinforced composite materials.
Docks in low-draught harbours (1.2m approx.)
Hydrobus
FOOTPRINT, HEIGHT AND PROFILE OF THE HYDROBUS
INTERNAL LAYOUT
217 Seats
FLOATATION + TRACTION + BUOYANCY UNITS
With a minimum drag resistance, laminar flow profile shape.
Systems integration: Floatation + Traction + Buoyancy.
Traction system:
Axial flow pump, with prerotational blades and JET NOZZLE.
Irrotational flow outlet without torsional moments on the structure.
The traction force, the drag resistance, the weight, the drive and the buoyancy forces all together form a KNOT OF FORCES, so that no moments are generated on the craft’s structure.
TECHNICAL INFORMATION AND RATIOS – AT 30 KNOTS / 150 SEATS
Engines 3 x 250 hp = 750 hp
Nº of seats 150
Displacement = 11.2 (metric) Tonnes (150 seats x 75 kgr)
Total weight (including passengers) = 22.4 Tonnes
RATIOS
Power/seat = 5 hp/seat
Power/speed = 25 hp/knot
These performance features improve with the use of composite materials
ADVANTAGES AND POTENTIAL
River and Sea transport.
High speed and comfortable ride (not affected by waves).
Reduced fuel consumption due to its hydrodynamic nature.
Its behaviour follows Reynolds’ laws (submerged bodies) and not Froude’s (floating bodies).
Allows for sailing in shallow waters.
No induced waves generated.
Easy mooting and access for passengers through its stern.
