Some Frequently Asked Questions about Hoverbarges.

Some Frequently Asked Questions about Hoverbarges.

Q) Does the Hoverbarge vibrate like high speed craft?
A) No. As it is not moving fast, there is no wave impact and the large mono cushion acts as a dampener

Q) When the air is lost (if all engines fail) will the craft come down hard?
A) No. It takes some minutes as the air cushion has to vent out the air, resulting in a soft landing

Q) Will it hover with one engine lost?
A) Yes. If on hover and one engine goes down, we have a shut off valve to stop air escaping back through the fan

Q) If a skirt segment is torn what happens?

A) Each one is individual and the one each side will try to expand to fill gap

Q) How many skirt segments can you lose before it stops hovering?
A) Approximately 10% in a complete section

Q) How steep a slope can you ascend?
A) For non self propelled Hoverbarges, as steep as you like if you have the pulling force. The critical area is the transferring from level to the slope and the barge forming a triangle. The transfer slope is determined by the hover height

Q) Will it float off hover?
A) Yes just as a marine barge (if it is designed to be amphibious)

Q) What happens if the load is on one side?
A) The same as a marine barge, it will tilt in that direction and may need counter ballast

Q) When travelling across a slope, will it slide?
A) Yes. It will swing in the direction of slope, so you need side restraints such as tractor or anchor points, or trailing wheels

Q) What is the effect of undulating ground?

A) The skirt takes up the profile and the Hoverbarge will stay level 

Q) What are the skill levels to operate the non self propelled Hoverbarge?
A) An ignition key to the diesel engine is the most sophisticated item. Normal marine contract labour is needed as all the equipment is standard contract equipment, except for the skirt

Q) If the skirt is damaged, how would it be repaired?
A) The skirt is made up of individual segments, each one attached by 5 bolts. Individual segments can be removed and replaced

Q) What happens if you pass over gullies?
A) The skirt will fall into the gully and seal the air loss up to the depth of the skirt. So a barge with a 1.2m hover height will be able to cross gullies 1m deep

Q) What happens if you pass over deep gullies?
A) This depends on the gully depth and width. For example, if we fill a large room full of ping pong balls and open a small door at the bottom of the room, the movement of balls out of the exit will be fast but the top layer of balls in the room will hardly move. Opening more doors will increase the loss. The loss of air in a large mono chamber is similar to this

Q) How do you cross areas with gullies?
A) If an area with gullies is to be crossed on a regular route then these can be filled on temporary basis with 1m diameter x 2 m long kit bags filled with plastic balls. These can be dropped in to form a seal and removed as the barge passes over. Other methods are available depending on the site conditions

Q) Can the Hoverbarge be built without pontoons - i.e. a single hull with a skirt?
A) Yes, pontoons are only used for ease of transport, the Sea Pearl was a one piece construction

Q) If pontoons are necessary, what is their load capacity while stationary on hard ground?
A) Deck load 10t/m squared

Q) What is the required air flow of the pumps and what pressure is required to pump the air?
A) Sorry but this is proprietary information

Q) Is the Hoverbarge self propelled?

A) This is an option

Q) How do you move the non self propelled Hoverbarge?
A) It is towed or winched as on level ground it takes less than 1/50th of the all up weight to move it for speeds under 5 knots. Once it moves above this speed the loads required increase quickly

For further information about the Hoverbarge, please Contact us