What is a Retract Servo? Uncovering the Mystery

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SUMMARY

A retract servo is a specialized type of servo used primarily in remote control applications, particularly for retracting the landing gear of hobby aircraft. Unlike standard servos, which maintain their position until a control signal is received, retract servos are designed to return to a central position when no signal is present. This functionality is crucial for ensuring that aircraft flaps or landing gear automatically revert to a safe position in the event of a lost radio signal. The typical movement range for a retract servo is 180 degrees.

PREREQUISITES
  • Understanding of servo mechanics and operation
  • Familiarity with remote control aircraft systems
  • Knowledge of radio control signal protocols
  • Basic concepts of hobby electronics
NEXT STEPS
  • Research the specifications and features of popular retract servos, such as the Hitec HS-65MG
  • Explore the differences between standard servos and retract servos in detail
  • Learn about the integration of retract servos in remote control aircraft systems
  • Investigate the impact of signal loss on servo behavior and safety mechanisms
USEFUL FOR

This discussion is beneficial for hobbyists, remote control aircraft enthusiasts, and anyone involved in designing or operating models that utilize retract servos for landing gear or other retractable components.

cf8
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I was browsing a hobby supplies site, and I came across retract servos. What are they? I know what a servo is, but I can't seem to find the definition of a retract servo.

I've been searching for a while, and I'm sure it's there just staring back at me from the computer screen, but I'm not seeing it. How is a retract servo different from a "standard" servo?
 
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Maybe this refers to a servo that will return (retract) to a central position in the absence of a control signal? Just the name sounds like this.

This would be good in remote control where the flaps of an aircraft could return to the horizontal position if the radio signal was lost.

Normal servos don't do this.
 
vk6kro said:
Maybe this refers to a servo that will return (retract) to a central position in the absence of a control signal? Just the name sounds like this.
That's a good thought. The only thing I could think of was a servo with an arm that could pull (retract). Your idea makes more sense.
 
I think it refers to a servo that retract the wheels of a hobby aircraft.
 
Bob S said:
I think it refers to a servo that retract the wheels of a hobby aircraft.
Thats correct. It wil therefore only make a turn of 180 degrees at once.
 

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