1. ISR 2011 : SCUBSTER Submersible
General Presentation

2. Contents The Team Overview & Goals Design Philosophy
Design & Fabrication
Testing & Training
Prototype Budget
Our Partners & Sponsors
Questions

3. The Team Project Leader : Stephane Rousson
Technical Team : Minh-Lôc Truong (Design)
Bruno Sertier (Engineering)
Divers : Terence Dewaele (diving instructor)
Delphine Del Cont
Robert Bonnar
Stephane Rousson
Team Coordination : Delphine Metayer

4. 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.

5. 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.

6. Design & Fabrication Model Testing Hull Bill of Materials Safety
Control
Manoeuvrability
Propellers Study
Main dimensions
Main Characteristics and calculated Speed

7. 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.

8. Hull (1/2) Carbon fiber + Epoxy resin pre-assembled hull
Hull half mold core preparation with carbon fiber sheets
Half hull structure (pieces of wood with mirror possibility) for matrix mold core manufacturing
Final assembly with gel coating prior to final sanding and painting

9. 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

10. 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

11. 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

12. Safety (2/4)
Safety Buoy : System overview

13. 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.

17. Control
COMPLETE PROPELLERS
COUPLING

18. Control
RIGHT PROPELLER
DECOUPLING
(RIGHT TURN)

19. Control
LEFT PROPELLER
DECOUPLING
(LEFT TURN)

20. Manoeuvrability

21. 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)

22. 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 : 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

23. Main Dimensions

24. Main Characteristics and Calculated Speed
Sref x Cx : m² (from test results on Demonstrator with measurement
of drag force vs speed in a Swiming Pool)
Hull Volume : m3
Calculated Max Speed : m/s ( W developped power

25. 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

26. Trials & Testing (2/2)
April 26, 2011 : Biometric Evaluation with Diving Medical Experts ( SMMUM Marseille)
Pulse record with variable dive depth during pedalling

27. (material and tooling only)
Prototype Budget
(material and tooling only)
Hull :
- Carbon Fiber :
- Epoxy Resin :
- Empennage :
- Gel coating & painting :
Canopy :
- Moulded Resin :
Propulsion :
- Propellers :
- Transmission :
Safety devices :
- Safety Buoy & mechanical actuation system :
- Strobe :
Small equipement :
Specific tools acquired for assembly :
Sub Total : € 9530
Package for transportation by airplane :
Grand TOTAL : € 9830

28. Our Partners and Sponsors
Ministère des Sports (French Sport Ministry)
Aqualung
E2R
Sicomin
Mapyachting
Gates
Nice Diving
Lemer
Partners :
E-Props, Heliciel, Dynasub, Plexinautic
Air 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)

29. Questions