Feature 1
20m x 5.6m Asv
monohull concept
using volvo IPs
6000 propulsion, 2 x
435hp.
Ships International estimates that the onboard comfort takes advantage of air wash, the proposed means of construction
soft motion monohull will have lower for motion damping and hull resistance is simple and cost efficient, and the craft
resistance throughout the speed range, and reduction,” Tudem concluded. “Estimates provides similar interior volume and
much less added resistance at higher loads. show market leading efficiency and fuel space compared to a monohull. Variants
There will be not ‘hump’ at 20-30knots, a efficiency. At maximum air support and can be designed for different missions and
range accounting for a large percentage of with waterjet propulsion a draft of only end user requirements, and the concept is
the craft’s operational profile. 0.50m for a 22m boat is possible. The scalable from approximately 17m and up
“This new design approach to improved concept also has the expected low wake to 50m + LOA.” WT
E-Craft approaching completion
The Office of Naval Research (ONR) ‘E-Craft,’ an
experimental high-speed ‘transformable’ hullform vessel,
•
shallow draft in shallow water.
is approaching completion at Alaska ship and drydock
in Ketchikan, Alaska. Interestingly, Susitna will also be the world’s first ice-
The E-Craft – a catamaran ferry named Susitna – will breaking twin-hulled vessel.
have the ability to transform from a deep-water transport
to a shallow draft vessel and operate in three distinct
modes: as a barge, catamaran and small waterplane
area twin hull (SWATH).
As highlighted previously in Warship Technology, the
E-Craft has a centre ‘barge’ that can be hydraulically
raised and lowered, and will also have the option to adjust
the buoyancy in its catamaran hulls whilst under way.
The ONR’s objective with the E-Craft is to demonstrate
a vessel that can operate as a multi-purpose,
expeditionary cargo and troop ship, operating efficiently
at high speed; also operate in ice and in shallow water;
and beach itself to load/discharge vehicles of up to the
size of a main battle tank.
The three modes of operation envisaged are:
•
catamaran mode for high speeds;
•
SWATH mode for stability in high sea states; and
The E-Craft, or Susitna, is due to be completed shortly.
Warship Technology October 2009 15
p13-15_WT ASV
OCT09.indd 15 17/09/2009 16:55:05
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52