Comparison Hulls - A Summary
The rest of the world is starting to realize that a tiny country at the southern tip of Africa is one of the leaders in the design of safe, fast, low-cost and extremely sea worthy offshore craft with this foil-assisted catamaran concept. There is also ongoing research which we expect to lead to further improvements in the near future.
Type A
Australian type with symmetrical sponsons, fine entry, medium-square tunnel, low deadrise.
Type B
Sailing-boat type symmetrical, round-bilge and tunnel, deep forefoot, no strakes.
Type C
Asymmetrical sponsons with low deadrise bottoms and no-trip chine, medium height square tunnel.
Type D
Split monohull with narrow, low square tunnel with high attack angle at bows.
Type E
Super-slim sponsons with medium-to-high tunnel, fine entry, designed to be used on protected waters.
Type F
SES (solid side skirt) hovercraft with low tunnel and skirts at bow and stern.
Type G
Kenton cat type with low round tunnel and round bottoms, tunnel lifting at bow.
Type H
HYSUCAT with one main foil and two trim foils, high deadrise bottoms and medium-high tunnel.
Type I
BOBKATTM with round, asymmetrical sponsons, high tunnel with tunnel-chines and bow steps.
Type J
BOBKATTM with FAST foils.
Benefits of fitting the FAST foil system to a catamaran Sportscruiser or Ferry:
- Increased top speed with existing engines, up by 20 - 40%
- Smaller engines can be fitted to reach required top speed
- Reduced fuel consumption down by 20 - 40%
- Increased travelling range up by 20 - 40%
- Improved sea keeping in rough seas - due to the dampening effect of the submerged foils
- Drier ride in choppy seas - due to the craft being partially lifted at speed and reducing chine spray
- Faster acceleration from one speed to another
- Increased payload carrying capacity with less speed loss
- Reduced wake size at speed - due to the keels being bolted together by the main foil
- Smoother ride at speed
- More responsive when turning at speed foil borne
- Most catamarans fitted with the HYSUCAT FAST FOIL SYSTEM bank at speed more like a monohull
- Lower emissions - due to less power being used to reach a particular speed
- Low maintenance - no moving parts
- The System works extremely well
