The following geometry is close to what you are looking for (drawn not to perfect scale):
Where for the 45 deg travel of the tilter you have somewhere close to 170 deg travel of the driven gear.
When tilter is raised, this will provide largest torque and small acceleration at the beginning, max velocity half-way, and then will gradually slowdown at the end of travel. Also, it will naturally lock the tilter in the raised position, without the need to keep the motors actively “holding”, which would be great fit for the differential power take off from the drivetrain motors.
I’ve seen a number of reveals having this geometry to some degree, with 1961Z, probably, being the best example (watch 0:52 to 1:05):
