Results

Visibility Results

Visibility wearing Helmet*

Lateral (both sides) - 165°

Upwards - 68°

Downwards - 97°

*Looking straight forward is the point of reference (0°).

Mobility Results

All mobility goals were met and/or exceeded. A 16% average reduction of ROM was achieved across all four areas tested.

Detailed Range of Motion (ROM) Results

Maximum ROM measured

1) Arms raised - 139°

2) Hip-flexion - 73°

3) Squat position - 63°

4) Axial rotation - 159°

5) Head turned up - 7.62 cm

6) Head turned down - 7.62 cm

7) Head turned laterally - 7.62 cm

ROM requirement

146°

75°

45°

209°

7.62 cm

20.83 cm

10.16 cm

% Difference

-4.9

-2.1

-33.3

-27.2

-92.9

-28.6

Range of motion diagrams.

From left to right: 1) arms raised 2) hip-flexion 3) squat position 4) axial rotation.

Force Transmission Results

(Top) Transmission of force from side of head impact.

(Bottom) Transmission of force from chest impact.

Normalizing impact forces reveals a positive trendline, indicating reliable and consistent force distribution across the system. This suggests that the Halo Helmet would behave similarly during real bike collisions, provided the roll cage is strong enough to withstand the forces involved.

Three impact strengths were tested (770N, 1000N, and 1300N). Side impacts to the head transferred force relatively evenly across the anchor points, with the back sustaining the majority. This pattern remained consistent across all impact intensities, suggesting scalability to higher forces.

Chest impacts showed less even distribution, indicating areas of concentrated force. Further testing and design refinements are needed to improve force dispersion and reduce localized stress.

Normalized forces to compare all three impact strengths.

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