ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation
ISR 2011 : SCUBSTER Submersible
General Presentation
ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation
Contents
The Team
Overview & Goals
Design Philosophy
Design & Fabrication
Testing & Training
Prototype Budget
Our Partners & Sponsors
Questions
ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation
The Team
• Project Leader : Stephane Rousson
• Technical Team : Minh-Lôc Truong (Design) Bruno Sertier (Engineering)
• Divers : Terence Dewaele (diving instructor)Delphine Del ContRobert BonnarStephane Rousson
• Team Coordination : Delphine Metayer
http://www.scubster.org/Team_Rousson.html
ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation
Overview & Goals
The original project started in 2009 when Stephane Rousson with the support of his partners decided to release a new Submersible Concept with the Innovative Design support of Minh-Lôc Truong.
The first aim of the project was to introduce a new wet submarine concept, with a design inspired by the Swordfish, focusing on manoeuvrability, undersea wide vision and high capacity for an extended autonomy. With the help of his partners and collaborators, the original Demonstrator prototype was first tested in Nice area during summer 2010 and has never stopped being optimized since .
For its very first participation to the International Submarine Race, the team is pleased to introduce the Scubster Demonstrator.
ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation
Design Philosophy
The Scubster demonstrator was designed to validate a new hydrodynamics approach combining aestheticism, inspired by sea animal universe, and manoeuvrability.
An original drivability & propulsion layout concept, based on a twin contra-rotating lateral propellers idea, enables a complete 6 degrees of freedom management only based on a 360°independent propellers orientation + left/right propeller coupling manual control.
ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation
Design & Fabrication
Model Testing
Hull
Bill of Materials
Safety
Control
Manoeuvrability
Propellers Study
Main dimensions
Main Characteristics and calculated Speed
ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation
Model Testing
• In June 2010, the ISTV Engineering School (Toulon – France) released a Test Report of drag measurement in the school model Test Basin with a model supplied by the Scubster team prior to Demonstrator manufacturing. The aim of this test was to predict the Drag Coefficient (Cx) and establish the hydrodynamic performance of the Demonstrator.
• A specific equipment (a pod equipped with a force gauge and driven at a pre-set speed range by an electric motor) was used for a 1:5 scale Test Model prototyped in stereolithography by E2R Company based on 3D CAD drawings performed by the Scubster technical team.
ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation
Hull (1/2)
Half hull structure (pieces of wood with mirror possibility) for matrix mold core manufacturing
Hull half mold core preparation with carbon fiber sheets
Carbon fiber + Epoxy resin pre-assembled hull
Final assembly with gel coating prior to final sanding and painting
ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation
Hull (2/2)
Canopy kinematics Principle for easy opening and pilot access
The empennage can be dismantled for compact packaging during transportation overseas and also gives apossibility to use an other set of stabilization surfaces
ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation
Bill of Materials
• Hull : Carbon Fiber Epoxy Resin coated
• Canopy : Plexiglass Resin
• Transmission : Aluminium, Stainless Steel, Bronze, Glass Fiber filled Nylon 66, Carbon Fiber Tubes, Rubber
• Propellers : Epoxy coated Wood / Laser sintered Nylon with glass beads
• Empennage : Aluminium
• Seat : Carbon fiber Epoxy Resin coated
• Safety Buoy : Nylon, Aluminium, Stainless Steel, HDPE
ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation
Safety (1/4)
• Emergency Exit : The wide canopy with easy access and opening allows a fast and easy ability to evacuate the submarine (actuated either from inside by pushing the canopy with hands or from outside by pulling the ring at the rear of it)
Strobe : Leakproof (40 m) flashing LED at 1 Hz, located on the top of the submarine
ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation
Safety (2/4)
• Safety Buoy : System overview
ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation
Safety (3/4)
• Safety Buoy :
The submarine is equipped with a handle + cable + friction stirrup mechanism (adapted bike braking system) pinching a spool extension. The spool is easy to be properly rewind with a modified fishing gun reel (after slipping the spool flange down and rotating it for manifold clearance and access). When the handle is pinched, the stirrup does prevent the wire spool from unwinding. If the handle is released, the stirrup does open and liberates the spool for buoy natural pop up.
ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation
Control
COMPLETE PROPELLERS COUPLING
ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation
Control
RIGHT PROPELLER DECOUPLING (RIGHT TURN)
ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation
Control
LEFT PROPELLER DECOUPLING (LEFT TURN)
ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation
Propellers Study (1/2)
Based on expected performance and achievable submarine speed for a given RPM and supplied Power, a first CFD Study of a 3 blades propeller was performed in April 2010 by ENSTA Bretagne (Engineering School Specialized in Marine applications; Brest – France)
ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation
Propellers Study (2/2)
After speed measurement in swiming pool and medical experts advices, the team designed a new propeller for optimized thrust at a lower pedalling RPM with a specific Propeller Calculation Software (Heliciel) :
- External Diam : 490 mm- Blade profile : NACA 1412- Blade Curvature : 20°- Efficiency : 0,79 @ 168 RPM
& 1,25 m/s
Based on 3D CAD drawings we provided, E2R manufactured for us a set of two contrarotative propellers in fast prototyping with the Nylon laser sintered technology
ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation
Main Characteristics and Calculated Speed
• Sref x Cx : 0.224 m² (from test results on Demonstrator with measurement of drag force vs speed in a Swiming Pool)
• Hull Volume : 1.45 m3
• Calculated Max Speed : 1.25 m/s (2.43 knots) @ 300 W developped power Predicted Speed when racing (@ 300 W)
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distance (m)
Spe
ed (
m/s
)
Calculated progression (straight forward) with 300 Watt developped power
0
10
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0 10 20 30 40 50 60 70 80 90 100 110 120
Time (sec)
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tanc
e (m
)
ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation
Trials & Testing (1/2)
• Summer 2010 : First prototype trials undersea (Saint Jean - Cap Ferrat, Nice area)
• February / March 2011 : 2 campaigns of testing in an Olympic size Swiming pool (Piscine Jean Bouin – Nice) Drag coefficient (Cx) determination by measurement of Drag Force vs. Speed Traction measurement with 2 types of propellers (submarine moored) Speed Up and Max Speed measurement Drivability trials with left/right propeller coupling/decoupling & orientation
• April 22, 2011 : New trials in sea with last design optimization (Saint Jean - Cap Ferrat) Reduced size of stabilization surfaces Reduced tail volume (improved stability with better buoyancy center and reduced inertia) Hull surface finish improvement
ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation
Trials & Testing (2/2)
April 26, 2011 : Biometric Evaluation with Diving Medical Experts ( SMMUM Marseille)
Pulse record with variable dive depth during pedalling
ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation
Prototype Budget (material and tooling only)
•Hull : - Carbon Fiber : 640- Epoxy Resin : 3000- Empennage : 100- Gel coating & painting : 300
Canopy : - Moulded Resin : 1600
Propulsion :- Propellers : 1000- Transmission : 1000
Safety devices :- Safety Buoy & mechanical actuation system : 150- Strobe : 40
Small equipement : 1000Specific tools acquired for assembly : 500
Sub Total : € 9530Package for transportation by airplane : 500
Grand TOTAL : € 9830
ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation
Our Partners and Sponsors
• Sponsors : Ministère des Sports (French Sport Ministry)
Aqualung E2R Sicomin Mapyachting Gates Nice Diving Lemer
• Partners :E-Props, Heliciel, Dynasub, PlexinauticAir france Cargo, Janine Robin, SMMUM
• Universities & Engineering Schools :Supmeca (Toulon - France)ISITV (Toulon - France)ENSTA Bretagne (Brest - France)
The Scubster Team does also support sharks protection via Ecosy-Action (above painting from Belinda Bussotti, Artist in Monaco)