Servo City Gearbox ratio choice

Discussion in 'Gas Boats Forum' started by Shane William Bastick, Dec 4, 2019 at 7:51 AM.

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  1. Dec 4, 2019 at 7:51 AM #1

    Shane William Bastick

    Shane William Bastick

    Shane William Bastick

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    Does anyone know which ratio to choose on the Servo City website for the Servo City Gearbox, its for a gas tunnel, and the choices are 3.8-1 or 5-1

    thanks in advance
     
  2. Dec 4, 2019 at 10:39 AM #2

    RobertDoak

    RobertDoak

    RobertDoak

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    Shane...
    Looking at the web site...it looks like the servo selection needs to first be addressed...lots of options including up to 7:1 ratio....speed...or torque.....I would start with the servo selection....and its not like the engine need to turn a lot...It just need to turn with authority..I would choose torque over the speed...
     
  3. Dec 4, 2019 at 7:54 PM #3

    Shane William Bastick

    Shane William Bastick

    Shane William Bastick

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  4. Dec 4, 2019 at 11:52 PM #4

    RobertDoak

    RobertDoak

    RobertDoak

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    Holy smoke...thats a monster torque servo...343oz @6.0 volts....analogue
    Add the gearing and all...thats 1715 oz. Torque or 107lbs ...235 kilo......well I dont think steering will be an issue....being the ratio options are several...if it was me I would choose a middle of the road ratio....5:1 and be safe.
     
  5. Dec 5, 2019 at 1:19 AM #5

    Shane William Bastick

    Shane William Bastick

    Shane William Bastick

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    many thanks for the advice Robert
     

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