Czar
7m Rigid Inflatable Power Boat
Design Brief:
To design a 7m patrol boat which would be built from marine grade Aluminium, simple construction, minimum build time, use of jigs, and all components to be water-cut/laser cut for easy assembly. The vessel should reflect a minimalistic style with faceted panels giving a utilitarian feel.
Design Solution:
The meet the design brief, Allure Marine decided to evolve proven hull forms & design features from previous paramilitary projects. Through manipulating a proven hull form through surface modelling software and running simulations for hull speed and sea keeping we finalised the hull form.
To define the exterior style particularly the pilothouse and aft deck concepts where created prior to the creation of the hull form, these concepts gave form to the Suspects key exterior design characteristics. We could then morph the hull form with the newly designed pilothouse and rear deck. This was achieved using both detailed 2D drawings and 3D modelling software.
Having now finalised hull form, pilothouse, and outboard well, fwd/aft decks we could concentrate on the internal structure. It was key to develop an internal structure that was regit and meet class society regulations. We designed an internal structure that would assure strength, lighting features and build simplicity through the utilisation of jigging.

Key Attributes:
- 23 Degrees Deep-V Hull Form
- Minimalistic Design Approach
- Performance Hull Form
- Pilothouse
- Powering via Outboard
- Optimised Internal Structure
- Open Rear Deck
- Ability To Mount Weaponry
General Specifications
| Length Overall: |
|
12.0m |
| Length Waterline: |
|
11.8m |
| Beam Max: |
|
3.2m |
| Draught DWL: |
|
0.57 |
Technical Data
| Displacement (Estimated Lightship) |
|
5.8to |
| Displacement (Max Operating Condition) |
|
6.6to |
| Deadrise |
|
21 degress |
| Drives (Recommended) |
|
1 x Yamaha 300hp Outboard |
| Drives (Max) |
|
2 x Yamaha 250hp Outboard |
| Fuel Capacity: |
|
300L |
| Fuel Type: |
|
Performance Grade Fuel |
| Water Capacity: |
|
N/A |
| Max Pax: |
|
14 |
| Germanisher Lloyd: |
|
(GL) Scantling guide |
| Maximum Speed (@ Half Load): |
|
≈32 knots |
| Cruising Speed (@ Half Load) |
|
≈28 knots |
| Construction: |
|
Marine Grade Aluminium 5086-H32 |