ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation ISR 2011 : SCUBSTER Submersible...

ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation

ISR 2011 : SCUBSTER Submersible

General Presentation


Contents

The Team

Overview & Goals

Design Philosophy

Design & Fabrication

Testing & Training

Prototype Budget

Our Partners & Sponsors

Questions


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


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.


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.


Design & Fabrication

Model Testing

Hull

Bill of Materials

Safety

Control

Manoeuvrability

Propellers Study

Main dimensions

Main Characteristics and calculated Speed


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.


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


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


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


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


Safety (2/4)

• Safety Buoy : System overview


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.


Control

COMPLETE PROPELLERS COUPLING


Control

RIGHT PROPELLER DECOUPLING (RIGHT TURN)


Control

LEFT PROPELLER DECOUPLING (LEFT TURN)


Manoeuvrability


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)


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


Main Dimensions


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)

0,00

0,25

0,50

0,75

1,00

1,25

1,50

1,75

2,00

2,25

2,50

0 10 20 30 40 50 60 70 80 90 100 110 120 130

distance (m)

Spe

ed (

m/s

)

Calculated progression (straight forward) with 300 Watt developped power

0

10

20

30

40

50

60

70

80

90

100

110

120

130

0 10 20 30 40 50 60 70 80 90 100 110 120

Time (sec)

Dis

tanc

e (m

)


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


Trials & Testing (2/2)

April 26, 2011 : Biometric Evaluation with Diving Medical Experts ( SMMUM Marseille)

Pulse record with variable dive depth during pedalling


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


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)


Questions

ISR 2011 – SCUBSTER Team Scubster ISR 2011 General Presentation ISR 2011 : SCUBSTER Submersible...

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