Drum Servo Winches
Analog & Digital

1. Captive Drum Technology
2. Digital — Standard Winch & Captive Drum Servos
3. Analog — Standard Winch & Captive Drum Servos
4. Returns

 
Video shows how easy is was to retro fit a “Captive Drum” servo into my 1/20 scale Jolie Brise in place of the SLA battery. The tall drum housing has been replaced with a lower white version which needs the provided special low friction cord to work correctly.
 


 

1. Captive Drum Technology

pictures of Captive Drum

The drum housing fits onto four spigots on the servo and has two slots for the sail sheet cords. The drum is held on the servo shaft by a screw. Can be used without the housing
This system does away with all those pulleys set around the inside of the hull. No more fidderly springs or rubber bands to tension the sail cord. How do you re–thread the pulley in the bow?
 
There are two types of “Captive Drum” servos, Analog and Digital and each have two different powers, speeds and sail sheet travel.

 
The Digital servos are reprogrammable once free of charge if returned to SailServo by recorder delivery. The software to reprogramme the servos is difficult to use as it was not designed to be used by consumers. If we damage the PCB we pay not you.
The sheet travel on Analog servos can be altered using End Point Adjuster.


 

2. Digital — Standard Winch & Captive Drum Servos

6114 servos

These two Digital servos are the same except for their gearing. One is very fast but less powerful and the other more powerful but slower.


 
Specification Dcd1 & 3 sw6109md Dcd2 sw6114md
Load Kg
/ Speed sec/100mm
/ % Motor speed drop band
/ Short mm
 
 
 
 
Load/Speed/Band/Short
  0.0    0.5      0%      0
  0.5    0.6     20%    11

  1.0    0.7     30%    50
 
 
 
 
Load/Speed/Band/Short
  0.0   0.9      0%       0
  0.5   0.9     10%      2
  1.0   1.0     20%      3
  1.5   1.0     20%      5

  2.0   1.1     30%      7
  2.5   1.2     40%      8
  3.0   1.4     40%     10
Current Hold/Running/Stall @ 1.0kg 0.5 / 0.9 / 2.2A @ 1.5kg 0.4 / 0.9 / 3A
Suitable RG65 IOM
Tr/Tx 2.4Ghz only
Voltage 4.8 to 6.0v
Direction of rotation Anti–clockwise
Deadband 7us = 10deg/3mm
Gears 1st Gear Titanium
Bearings Dual Ball
Motor Type High quality Coreless
Water Resistant No — Under Test
Lead (mm) Futuba Style 265mm
Operating Temperature -10 to 60 degrees centigrade
Size & Weight 40 x 20 x 39mm & 60g
Drawing

 

 

3. Standard Winch & Captive Drum Analog Servos

pictures of analog servos
 
 
 
Specification sw5513-6ma sw4805-4pa sw4805-1.5pa
Load Kg
/ Speed sec/100mm
/ % Motor speed drop band
/ Short mm
 
 
 
  Kg  Speed % Short
  0.0    2.1     0%     0
  0.5    2.2   10%   10
  1.0    2.3   15%   15
  1.5    2.4   20%   20

  2.0    2.7   30%   30
  2.5    3.1   35%   35
  Kg  Speed % Short
  0.0   1.3     0%   0
  0.5   1.5   10%   0
  1.0   1.9   14%   0

  1.5   1.0   30%   0
  Kg  Speed % Short
  0.0   2.0    0%     0
  0.5   2.5   15%    7

  1.0   3.0   30%   10
Current Run/Stall 0.35A @ 1.0kg / 1.5A 0.35A @ 0.5kg / 1A 0.3A @ 0.5kg / 1A
Travel mm @ 1ms & Turns 475mm & 5.8t 380mm & 4.7t125mm & 1.5t
Spektrum @ 0.73ms & Turns 340mm & 4.1t 280mm & 3.4t90mm & 1.1t
Suitable Under 1m Under 650mm Under 650mm
Gears Metal Plastic Plastic
Bearings Ball & OiliteOilite & AluminiumOilite & Aluminium
Weight 65g55g55g
Voltage 4.8 to 6.0v Nominal
Direction of rotation Clockwise
Deadband 7µs = 10deg/3mm fixed
Motor Type 3 pole cored
Water Resistant No
Lead 265mm Hitec type
Operating Temp -10 to 60 degrees centigrade
Size 40 x 20 x 39mm
Drawing

 
graph load v speed drop

A meaningful method of showing all Sailservo's servo data.
Servo Motor speed should not be run below 40% speed drop. Between 20 and 40% is reasonable for intermittent usage and less than 10% for heavy continuous usage.


 

 

4. Returns

SailServo must be contacted before returning goods.
All servos undergo a rigorous 10 min test over 50 cycles under loads upto 3.0kg.
Only use this servo within the specified loads and input signal ranges.
Burnt out servos can be replaced at half price plus postage. Must be returned first.
 
If in doubt, contact me first.