Why do car seatbelts have one strap whereas airplane pilot seatbelts have two straps?
In: Engineering
Pilot harnesses are actually a 5-point harness; there’s a strap that comes up between the legs, with a 4-part buckle assembly, and then a lap belt (L and R straps) and two shoulder straps (L and R) go into that.
You find this same sort of harness in the seats of high-speed race cars.
The use-case is the same: keep the person/people in control of the vehicle firmly in place despite the extreme forces exerted on them trying to pull them out of their seats in some extreme conditions that either may (pilot) or will (racecar driver) occur in normal operation.
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