Slow Servo

Realistic flap and landing gear actuation.

This circuit slows the speed of a conventional proportional servo.
It regulates the time required for full servo rotation from 1 to 10 seconds without any reduction in the servo's torque, and every servo position is possible (proportional).

It is suitable for:

• Landing gear
• Flaps
• Throttle control of gas-turbine engines
• LMH-110 (with modified hex file, see below)

and more.

The circuit

is very simple because it uses a microcontroller.

Dimensions: 20 x 13 mm
Power Supply: 2,7 - 6 V (4 cells) 

Set-up is also very simple.
First program the controller with the file "goslow.hex".

1. Setup servo speed

• Connect the jumper
• Connect the power supply
• Remove the jumper after the required positioning time

2. Setup servo starting position

• Drive the servo to the required starting position
• Connect the jumper for a short time and  then remove it

Project Download (4. 2. 2000, goslow.hex, Eagle Files)

For programming informations and programmer software please visit my AVR programmer page

LMH-110 and other helis with fixed pitch and brushless motors:

You can use the circuit above to smooth quick stick movements causing gearing problems.
Please write an e-mail, if you are interested.
I'll send you the hex file and information about using it.

Book Description Twenty years after its first publication, this book continues to be regarded as the standard work on model aircraft, attracting worldwide interest and approval. This new edition includes new sections incorporating new research and developments in model flying practice. The book presents standard aerodynamic theory as it applies to model flight in a concise and practical form for enthusiasts wishing to better understand the behavior of their models in flight.

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