Sealegs Amphibious Marine Craft
HOW DOES IT DRIVE ON LAND?
Sealegs is driven hydraulically by an air-cooled motor under the seat. The air-cooled motor is a 24hp Honda, 2 cylinder, 4 stroke which uses the same petrol and petrol tank as the outboard.
HOW FAST DOES IT GO?
10km/h on the land, and 30-35 knots on the water. The wheel motors are low speed, high torque (although Sealegs did set a new World Speed Record for an amphibious boat of 105kmph on Sydney harbour, 7th December 2007)
HOW STEEP A GRADIENT WILL IT CLIMB?
One in four gradient = 14 degree slope.
WHAT SURFACES CAN IT DRIVE OVER?
As a general rule Sealegs will operate over terrain where you can launch a 6.1m or 7.1m boat trailer boat using a car.
HOW LONG CAN I DRIVE WITH THE HONDA INBOARD MOTOR?
You can drive for a maximum of 10 minutes, which is approximately 1.6km. Run time begins the moment you start the engine.
WHY ONLY 10 MINUTES OR 1KM ON LAND?
Because the Honda inboard engine and hydraulic transmission oil are air cooled, after 10 minutes of constant use it requires approximately 50 minutes to cool down before use again.
HOW MUCH DO THEY WEIGH?
6.1m D-Tube = 1,090kgs (2400lbs) and the 6.1m RIB = 990kgs (2200lbs) (115hp E-Tec outboard and 80L fuel) 7.1m RIB = 1220kgs (2690lbs) (with 150 E-Tec outboard and 80L fuel)
WHAT IS THE DIFFERENCE BETWEEN A RIB & A D-TUBE?
A RIB is a Rigid Inflatable Boat as has inflated tubes made of 828 grade Hypalon (a rubber compound), compared to a D-Tube which is an all aluminium boat made from 4mm 5083 Marine Grade aluminium. Our customers tend to be drawn to a RIB if they're looking for more recreational use that includes fishing, diving, water skiing and general boating. D-Tube owners tend to be more orientated to purely fishing and working their boats harder with cray pots and scallop dredges etc.
The D-Tube does offer the added Option of having Clears domed into the Bimini, which creates a sheltered forward cockpit area for those looking for extra protection from the weather. The RIB has the Option of a Bimini only.
WHAT IS THE HEIGHT WITH WINDSCREEN UP?
2.37m (7.1m model).
2.32m (6.1m model)
WHAT IS THE HEIGHT WITH WINDSCREEN DOWN?
2.02m (7.1m model)
1.96m (6.1m model)
WHAT IS THE HIGHEST POINT WITH THE WINDSCREEN FOLDED DOWN BUT SITTING ON A TRAILER?
The Ski Hoop at 2.06m.
WHAT IS THE HEIGHT DIFFERENCE BETWEEN THE STANDARD WINDSHIELD AND THE RUGGEDIZED CONSOLE?
The Ruggedized Console is 4cm higher compared to a Standard Sealegs Console, when its measured with its folding windscreen in the Up position.
WHERE ARE THEY MADE?
5 Unity Drive South, Albany, Auckland, New Zealand
DO YOU HAVE TO REGISTER IT?
Each country is different but in general you cannot register or license Sealegs for use on public roads.
DO THE WHEELS CAUSE MUCH DRAG?
No - all the wheels lift up and retract above the water line.
CAN YOU LAND A SEALEGS BOAT ON A SURF BEACH?
We are aware of some Sealegs owners who do this successfully on a regular basis. However, Sealegs promotes responsible use of our amphibious craft at all times, and we advise that it is up to the seamanship and common sense of the person in charge of driving the boat to use their Sealegs boat in a manner that does not risk human life.
CAN THE BOATS DRIVE ON LAND IN REVERSE?
Yes they can, at variable speeds up to 10kph (6mph)
WHAT IS XRT (EXTENDED RUN TIME)?
The Sealegs Extended Run Time Option (XRT) is a commercial upgrade offered on Sealegs amphibious boats to increase the on land run time from 10 minutes to at least 30 minutes of continuous operation every hour on land at high ambient temperatures (40 degrees Celsius) Significant amount of research and development has gone into the Extended Run Time hydraulic and thermal engineering. Sealegs Product Engineers have designed the fitment of the additional components into the onboard engine box space. All additional XRT components have been evaluated and field tested to ensure that they are light weight and durable in a harsh marine environment. Note that operation of the hydraulic drive systems in flood waters uses the cooling effect of the flood waters and with the XRT upgrade allows continuous run time of up to 30 minutes every hour in the duty cycle. After 30 minutes of continuous operation that XRT and inboard components should be rested for a minimum period of 30 minutes before being used again.
The XRT option features the following components and specifications over standard models:
- 24hp Honda twin cylinder, 4-stroke engine on 6.1m boats (upgraded from 16hp)
- Hydraulic Oil Cooler – Coated aluminium for high performance and corrosion resistance
- Hydraulic Hot Flush Valve – With anodised aluminium cartridge valve to send hot transmission oil to the oil tank, replenishing it with cooler, filtered oil. This ensures high performance and reliability.
- Fan Assisted Hydraulic Oil Cooling- An additional high performance fan is coupled to the hydraulic oil cooler. Also assists in reducing engine box air temperature.
Improved thermal transfer stainless steel exhaust muffler - Reduces engine box temperature by isolating the hottest component in the boat.
- Custom exhaust shroud- Removes heat from the engine and exhaust efficiently via a ducted channel to direct hot air out of the engine box while serving as a radiation shield.
- Over Temperature Alarm- Warns if the system starts to overheat. A warning buzzer will sound to indicate to the operator that the boat should be slowed down, or stopped allowing the system to cool down. This should only happen in extreme situations
WHAT IS AWD (All Wheel Drive)?
A new option available on Sealegs amphibious boats ordered for boats starting production from May 2010 onwards is AWD –All Wheel Drive. The AWD option adds an additional wheel motor to the front wheel of a Sealegs amphibious boat. This assists in additional traction and significant increases to terrain capability when encountering beach inclines of soft sand, shell, shingle and/or pebbles.
Additional AWD hydraulic circuitry and solenoid controlled via a switch on the console allows changing between rear wheel drive and AWD. The changeover of driving mode should be done when the boat is stationery and is available to enable rear wheel, full land speed. When in AWD mode the top speed is reduced by 33%.
With AWD activated the boat will run in a limited slip mode to allow for easier turning of corners. In cases where maximum traction is required, a momentary push on the button at the end of the hydraulic joystick engages full diff lock mode. This full diff lock is generally only required for a few seconds when trying to climb over a beach lip, or shelf. Normal limited slip diff mode makes the boat very capable in most situations.
AWD is listed as an Option, as most recreational customers probably won’t need it, based on the fact there are already over 400 Sealegs boats in use worldwide with standard rear wheel drive.
When faced with a Sealegs owner experiencing a more challenging terrain environment, the first thing you should suggest is always to firstly reduce their tyre pressure to minimum inflation (approx 4-6 PSI), as this will provide the biggest initial improvement in their traction capability. This is true for both rear wheel drive boats and AWD drive boats.
AWD is only required for marginal beaches (with soft sand shelf, shingle shelf, or pebbly shelf). In those situations it is only needed when exiting the water and more than likely rear wheel drive mode will be all that is required for entering the water.
• Note that the AWD option IS NOT retro-fit able to existing Sealegs boats already in the field; it is only available for new builds.
Sealegs envisages AWD appealing as an Option mainly to Rescue, 1st Responders, and Military as well as some Commercial users. Only recreational customers with marginal beaches would be able to enjoy any advantage from it, so it’s important to clearly understand the end users likely terrain environment to determine whether AWD is required for their Sealegs.
AWD does increase the types of beaches where Sealegs can now be used, so it increases the geographic market size.
AWD enables Sealegs craft to become incredibly capable in some extreme situations, so for Rescue, 1st Responders Military and some Commercial users we believe it will be well received and more than likely a preferred Option for these operators.
AWD can be ordered as an Option for a non-XRT boat; however that would only be for recreational customers with less than 10 minutes per hour land use.
For Rescue, 1st Responders, Military and Commercial users, the AWD option should be ordered together with the XRT option to adequately spec the craft for the demanding work environment and heavier duty cycles that the craft can expect from such end user operators.
CAN YOU TOW IT ON ITS WHEELS?
No - however you can get a drive on drive off trailer for towing it long distances. There is also a “free wheel valve” option which enables the boat to be pushed or towed at low speed for very short distances on its wheels.
DOES THE PRICE OF A SEALEGS INCLUDE THE PRICE OF THE OUTBOARD?
No, on the 6.1m models you can chose a 115hp Evinrude E- TEC or a Yamaha 115hp 4-Stroke. On the 7.1m you can chose between the Evinrude E-TEC 150hp, or the Yamaha 150hp 4-Stroke. On the 7.7 you can chose between the Evinrude E-TEC 150hp or 200hp H.O. or the Yamaha 150hp 4-Stroke or 200hp Lightweight 4-Stroke. Only the Evinrude E-TEC outboards meet CE Proof standards needed for import into European countries. Evinrude is also the only manufacturer to offer a Non-declining 5 Year Warranty that is Internationally transferrable to every country.
CAN I BUY A SEALEGS AMPHIBIOUS BOAT WITHOUT THE OUTBOARD MOTOR?
No, all Sealegs amphibious boats have to have one of the outboards specified on our price sheet installed at the factory, due to the fact that our boats are manufactured with an integrated wiring loom that is custom made for our craft. The outboard ignition switch also controls the inboard motor and we have a dual charging system. We also sea trial everyone of our boats before shipping, and this can only be done with the outboard engine mounted.
WHERE IS THE PETROL TANK, AND HOW MUCH DOES IT HOLD?
The fuel tank is under the floor and has a capacity of 80 litres, (6.1m, D-Tube and 7.1m) or 180 litres (7.7m). The 7.1m model only also has the option of an additional 100L Auxiliary fuel tank.
DO THEY COME ANY BIGGER OR SMALLER?
At the moment there is a Rigid Hull Inflatable and an Aluminum D-Tube which are both 6.1M (20ft) and based on the same hull design, as well as a bigger 7.1m (23ft) RIB model and our largest 7.7m (25ft) RIB cabin and wide console models. They cannot be built smaller due to the size and weight of the hydraulic equipment required to make the amphibian perform in various conditions.WHERE CAN I BUY ONE?
Sealegs has authorized agents in the USA, United Kingdom, France, Australia, South Korea, Malaysia, Middle East, Italy, Hong Kong, Greece, India and Thailand. All other enquiries should be directed to the New Zealand Office.
CAN I RETRO FIT THE SYSTEM ONTO AN EXISTING BOAT?
No - With the two marinised hydraulic motors, three custom marine lift cylinders, custom front wheel steering cylinder, front and rear alloy legs/bushes/brackets, hydraulic tank, filters, hydraulic transmission pump and remote hydraulic joystick, hydraulic manifold block with valves, solenoids, flow divider, control electrics, tandem hydraulic gear pump, 24hp Honda engine, throttle/choke control, cable, bell housing, torque coupler, inboard engine bed and engine box, custom stainless steel hubs, alloy rims and ATV tyres plus all the hydraulic hoses and stainless steel fittings it makes it nearly impossible to retrofit. This also explains part of the extra cost of Sealegs amphibious boats. Refer: CONTACT US
WHAT WIND AND SEA STATE CAN A SEALEGS BOATS OPERATE IN?
Sealegs boats are all certified to comply with CE category C, which is 2m swells and Beaufort wind scale 6.
WHAT CERTIFICATION CODES IS SEALEGS COMPLIANT WITH?
Sealegs is CE and United States Coast Guard compliant.
DOES SEALEGS PRODUCE ANY MODEL WITH A JET INSTEAD OF AN OUTBOARD?
No we don't and the company has no immediate plans to produce one. Currently the only external power option available is either an Evinrude E-TEC or Yamaha outboard engine.
Sealegs is a registered trademark of Sealegs International Limited. The Sealegs amphibious boat design is a registered design. The Sealegs system has registered patents in the USA, South Africa, Australia and New Zealand, and has other international patents pending.
© Copyright 2002-2013 Sealegs International Limited. All rights reserved.
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