Hitec Hs-75Bb Retract Servo, .34Sec/114Oz @ 6.0V

This is a 75BBS Retract Servo used for R/C Airplane Mechanical Retracts
with a Universal Futaba J, Hitec S, JR and Airtronics Z connector.

FEATURES:
High torque
Travels 180° - full-lock to full-lock - to hold your gear in position
    firmly. Not proportional. Perfect for mechanical retract
    installation.
Water resistant
Ball bearings

INCLUDES:
Servo w/Universal adapter, as well as full set of horns, grommets,
    bushings and mounting screws.

SPECS:
Length: 44mm (1.7") Weight: 35g (1.23 oz.)
Width: 23mm (0.9") Torque: 6.6 kg-cm (92 oz-in)
Height: 25mm (1.0") Speed: 0.5 sec/60°

COMMENTS:
A retract servo is a very specialized servo. It is non-proportional,
    going 180 degrees, "lock to lock". They are specifically produced
    mechanical retracts to lock the gear in the up and down positions.
    they DO NOT have any methods of end point change and can not be
    changed by ATV on a transmitter. They are only able to go 180
    degrees and supply full maximum offered torque at the 2 end
    points. This is their whole purpose and deliberate {design|style}, however if
    somebody has a unique design circumstance where they need other than
    180 degrees offered, then they should use a proportional servo,
    not a retract servo. They are specifically designed to hold up against
    constant holding loads in the up and down positions, special to the
    usage of mechanical pulls back.
    Pneumatic retracts do not need a retract servo. A proportional
    standard or small servo is used to move the air valve backward and forward

    For Gear set, order HRCM6343