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| MFA Olympus gearbox. | Direct drive fan. |
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The BEASAC and SR.N6 Mk6C models both have fans driven by conventional brushed motors. The picture on the left shows the original configuration of the SR.N6 Mk6C model. This used a LightSpeed 600 driving a custom centrifugal fan through an MFA Olympus gearbox. The motor has been replaced with a Speed700, and the gearbox replaced with a custom belt arrangement.
The fans are built to scale, and are 7" in diameter. The picture on the right shows a custom fan built on an AXI 2826/12 motor. As this brushless motor has high torque and runs slower than a brushed motor, there is no need for a gearbox. This model will hover on a smooth surface with the motor consuming 30 Watts. This arrangement is used on the fourth SR.N6 Mk6 that I built.
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| MFA Olympus gearbox. | Direct drive fan. |