The S136G Compact Landing Gear Retract Servos are extra-flat so they will fit into a wing. This servo can produce high-current draw from your batteries. If using NiMH or Li-Po batteries, make sure they are capable of delivering sufficient amps. FEATURES: Two Ball Bearings Metal Gear Set 3-pole motor Compact Size Travels 180° - full-lock to full-lock -- to hold your gear in position securely. Not proportional. Perfect for mechanical retract installation. (see COMMENTS) One-Year Warranty. INCLUDES: One S136G Compact Retract Servo w/ J Connector SPECS: Length: 1.8" (46mm) Width: 0.9" (23mm) Height: 1.0" (25mm) Torque: 92 oz-in @ 4.8V (6.6 kg-cm @ 4.8V) Speed: .58 sec/60° @ 4.8V (it actually travels 180° see COMMENTS) Weight: 1.5oz (42g) COMMENTS: A retract servo is a very specialized servo. It is non-proportional, going 180°, "lock to lock". It is specifically made for Mechanical Retracts to lock the gear in the up and down positions, and DOES NOT have any means of end point adjustment and cannot be adjusted by ATV on a transmitter. It is only able to go 180° and provide full maximum available torque at the two end points. This is its whole purpose and intentional design, but if someone has a unique design situation where they need other than 180° available, they must use a proportional servo, not a Retract Servo. Retract Servos are designed to withstand constant 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 standard or mini servo is used to move the air valve back and forth
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