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Friday, July 3, 2015

Servo's for RG-65

While there are many types of servos useable on an RG-65, I thought I'd share the information on the servos I use for sail and rudder control on Peck, and will be using on the Mustang. While, there are many options, these servos have performed reliably for over a year, and are a good value.

I use an arm servo arrangement for sail control as opposed to a drum, though either is fine. I've had a lot of success with the Corona DS558HV from Hobby King:

Corona DS558HV Digital Metal Gear Servo 14kg/ 58g/ 0.18 Sec

Model: DS558MG  
Operating Voltage: 6.0V / 7.4V
Operating Current: 300mA / 400mA
Operating Speed: 0.20sec.60º/ 0.18sec.60º
Stall Torque: /
Size: 20X40X38.5mm
Weight: 58gDead Band: ≤3uSecOperating 
Travel: 40º/one side pulse traveling 400us
Potentiometer: 5 slider/Direct Drive
Ball bearing: MR106
Gear: Metal
Connector wire: 300mmOperating Temperature Range: -20c+60c

For the rudder, I use the Corona DS929HV:

Corona DS929HV (7.4v) MG Digital Servo 2.4kg/ 12.5g/ 0.09sec

Model: DS929HV
Operating Voltage: 6.0V / 7.4VOperating Current: 200mA / 240mA
Operating Speed: 0.10sec.60º/ 0.09sec.60º
Stall Torque: /
Size: 22.5X11.5X24.6mm
Weight: 12.5g
Dead Band: ≤3uSec
Operating Travel: 40º/one side pulse traveling 400us
Potentiometer: 2 slider/Direct Drive
Ball bearing: MR85
Gear: MetalConnector wire: 215mm
Operating Temperature Range: -20c+60c

Both servos come with a variety of mounting and arm pieces, and will go easily into most receivers. I have found them to be powerful enough in the worst of conditions, and draw little enough power from the battery to be very energy efficient (One battery typically will last all day). They are also inexpensive via mail order at a whopping $11.00 and $8.00 respectively!

Here's mine mounted in a simple radio board on Peck, although, again, there are many possible permutations:

Looking forward, with sail arm winch and rudder clevis.
No switch in this design, just plug/unplug battery.

I order these through the folks at Hobby King, available here.

Check them out!

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