There isn't - the V-22 rotors tilt continuously from vertical to horizontal rather slowly as it builds up enough speed to transition to forward flight. Same thing with Quantum's VTOL UAVs.
And since the Heaviside has many pairs of small rotors, it has another option which is to switch the rotors gradually pair by pair, but switching each pair quickly.
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There isn't - the V-22 rotors tilt continuously from vertical to horizontal rather slowly as it builds up enough speed to transition to forward flight. Same thing with Quantum's VTOL UAVs.
And since the Heaviside has many pairs of small rotors, it has another option which is to switch the rotors gradually pair by pair, but switching each pair quickly.