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
    securely. Not proportional. Perfect for mechanical retract
    installation.
Water resistant
Ball bearings

INCLUDES:
Servo w/Universal port, along with full set of horns, grommets,
    bushings and installing 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 really specialized servo. It is non-proportional,
    going 180 degrees, "lock to lock". They are particularly made for
    mechanical retracts to lock the gear in the up and down positions.
    they DO NOT have any ways of end point modification and can not be
    changed by ATV on a transmitter. They are just able to go 180
    degrees and supply full maximum readily available torque at the 2 end
    points. This is their entire purpose and intentional style|style}, however if
    somebody has a unique design situation where they need other than
    180 degrees readily available, then they should utilize a proportional servo,
    not a retract servo. They are particularly created to withstand
    continuous holding loads in the up and down positions, unique to the
    use of mechanical retracts.
    Pneumatic retracts do not need a retract servo. A proportional
    basic or tiny servo is used to move the air valve back and forth

    For Gear set, order HRCM6343