Shell Eco-marathon Asia Pacific and the Middle East 2023 | BIMA CAKRAWANGSA

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305

ID0034002 BIMA CAKRAWANGSA

Universitas Negeri Surabaya

Results

Attempt 3

84.3

52.4

km/kWh

mi/kWh

BEST RESULT

1 2 3 4

Current Rank

18th / 19

17 103.0 km/kWh 64.0 mi/kWh +22.2%

18 84.3 km/kWh 52.4 mi/kWh

19 71.3 km/kWh 44.3 mi/kWh -15.3%

Technical Inspections

Before they get on track, Prototype vehicles need to pass a series of 12 technical inspections. For some, the only goal is getting through this test. Many never even make it that far.

12/12
Complete 12/12 inspections passed

Passed

1. Inspection Queue Entry

3 / 3

Passed (one driver)

2. Driver's Control

19 / 23

Appropriate motorsports helmet (s) - Primary Driver (21 a)

Helmet label readable - Primary Driver (21 a)

Helmet has no cracks/indentations - Primary Driver (21 a)

Visor is clear and has no cracks - Primary Driver (21 b)

Racing suit (s) / Gloves - Primary Driver (21 a, c)

Single piece fire retardant racing suit - Primary Driver (22 a)

Shoes; socks & balacava/FRC - Primary Driver (22 b, d)

Driver weight (> 50kg) - Primary Driver (20 a)

Appropriate motorsports helmet (s) - Reserve Driver (21 a)

Helmet label readable - Reserve Driver (21 a)

Helmet has no cracks/indentations - Reserve Driver (21 a)

Visor is clear and has no cracks - Reserve Driver (21 b)

Racing suit (s) / Gloves - Reserve Driver (22 a, c)

Single piece fire retardant racing suit - Reserve Driver (22 a)

Shoes; socks & balacava/FRC - Reserve Driver (22 b, d)

Driver weight (> 50kg) - Reserve Driver (20 a)

Ballast required?

Ballast based on lightest driver (20 c)

Ballast of suitable type, proper location, sealed (20 b)

SHELL logo front / both sides (4 a-g)

Race number front / both sides (4 a-g)

Partner sticker both sides (4 a-g)

Other stickers < 400 cm² (4 a-g)

Passed

3. Vehicle Weight

2 / 2

Passed

4. Vehicle Dimensions

6 / 6

Passed (one driver)

5. Seat Belts & Roll bar

11 / 13

Safety Belts ≥ 5 mounting points (29 a-b)

Safety Belts - chassis fixing (29 d)

Crotch strap under body (29 b)

Top strap at 10° angle (29 b)

Length adjustor high enough for adjustement (29 b)

Safety belt has a tight fit (no slack) (29 c)

Safety belt strenght verified (29 d)

Crumple space-protect from front/side impact (25 a ii)

Roll bar resist 70 kg all directions (26 d)

Roll bar 50 mm > driver's head - Primary Driver (26 b)

Roll bar width > shoulders - Primary Driver (26 c)

Roll bar 50 mm > driver's head - Reserve Driver (26 b)

Roll bar width > shoulders - Reserve Driver (26 c)

Passed

6. Brakes

9 / 9

2 Hydraulic brake system 1 front & 1 rear (43 a)

1 single Hydraulic circuit per axle (43 a)

Foot operated front brake by single pedal (43 a)

Rear brake by single lever or pedal (43 a)

Brake rotors point in direction of wheel rotation (43 a)

No acting on tyres (43 a)

All wheels have brakes (43 a)

Ergonomy (both hands on steering mech.) (43 a)

Effectiveness Ramp Test (43 b)

Passed (one driver)

7. Visibility

7 / 9

Front vis 180° & Tint - driver must be seen - Primary Driver (28 a)

Rear visibility + Mirrors > 25 cm² - Primary Driver (28 b)

Front vis 180° & Tint - driver must be seen - Reserve Driver (28 a)

Rear visibility + Mirrors > 25 cm² - Reserve Driver (28 b)

Windows material (polycarbonate/lexan) (25 e)

Electrical automotive horn (31 a)

Horn sound level > 85 dBa @ 4 m (31 b-c)

Horn uses accessory/ propulsion battery (31 d)

Driver not in head-first position (33)

Passed (one driver)

8. Exit

1 / 2

Passed

9. Mechanical Vehicle Design

19 / 19

Fully closed body (25 j, g)

Quality of body driver collision protection (26 a-d)

Front Crumple Zone ≥ 100 mm (25 a ii)

Solid floor & frame (25 i)

No external appendages or sharp edges (25 c)

Body panels do not change shape in wind (25 b, d)

Internal/ext'l opening mech effective/intuitive (30 c)

Method of opening marked with red arrow (30 c)

No tape outside to seal body cover (30 d)

Bulkhead rigid & fire resistant (27 b-d)

Bulkhead isolates energy/driver compartment (27 a)

Chain/belt guard (34 g)

Running wheels (Pr:3/4, UC:4) (25 a iii)

Wheels dimensions & matching rim OK (41 a-b)

Wheels isolated from driver, chassis, or body (41 c)

Nothing touching wheels (e.g. batt cables..) (41 e)

Steering efficiency no play (42 d)

If indirect/electr, safe b/up (man. override) (42 c)

If electronic steering no joystick (42 c)

Passed

10. Electrical Vehicle Design

15 / 15

Correct vehicle electrical schematic (58 c)

Electrical enclosures - transparent (57 j)

Only one Battery, single physical package (57 b)

Max 48 V nominal (60 V Peak) (57 a)

Capacity < 1000 Wh (57 d iv)

Main fuse < 300 mm from +ve terminal (57 e)

Batt mount firm, behind b/head, not under seat (57 c)

Solid metal containment tray OR Lipo bag (57 d vi)

Charger built for battery (57 d iii)

Charging Protection (fire blanket, Lipo bag) (24 h)

Electrical wiring connections visible/no splices (57 k)

Elec system has proper fuse protection (57 e)

JM Installation in engine compartment (56 c)

JM Correct circuit location (56 d)

JM Counting Correctly (56 d)

Passed

11. Energy Verification

15 / 15

Doc'n (schematic, Batt/BMS, m.controller) (58 c)

Only two terminals (57 b)

Batt + and - isolated from frame and body (57 f)

Self-built batt - cell level current protection (57 d ii)

In-vehicle Battery Management System (57 d i)

JM Installation in engine compartment (56 c)

JM Read/reset from outside (56 c ii)

JM Position in circuit (before motor controller) (56 d)

Purpose built motor controller (67 a)

Blue triangle sticker (37 f (iii))

Latching push button (no push/pull levers) (37 g)

Dead man's switch (37 h)

Internal/External Estop Switch (37 f)

Physical Estop (37 d)

Efficiency of emergency shutdown (37 a-c)

Passed

12. Final Check

4 / 4

Previous participation
Event	Vehicle category	Energy class	Rank	Result
Indonesia 2022	Prototype	Battery Electric	6	152.38km/kWh 94.68mi/kWh

ID0034002 BIMA CAKRAWANGSA

Universitas Negeri Surabaya

Results

Attempt 1

Attempt 2

Attempt 3

Attempt 4

Current Rank

Technical Inspections

1. Inspection Queue Entry

2. Driver's Control

3. Vehicle Weight

4. Vehicle Dimensions

5. Seat Belts & Roll bar

6. Brakes

7. Visibility

8. Exit

9. Mechanical Vehicle Design

10. Electrical Vehicle Design

11. Energy Verification

12. Final Check

Previous participation