Model Boat Mayhem

Technical, Techniques, Hints, and Tips => The "Black Arts!" ( Electrics & Electronics ) => Topic started by: ronnie42 on February 16, 2022, 10:39:25 pm

Title: Tank steering
Post by: ronnie42 on February 16, 2022, 10:39:25 pm

 I have a spare rc tank board, an Elmod fusion pro . Its rated for 10A and short burst 30A, what size of boat and motors would be suitable. Reason for using, has lighting circuits, 3 servos and you can load custom sounds .

Title: Re: Tank steering
Post by: canabus on February 17, 2022, 10:56:56 am

Hi Ronnie


What about a twin prop Landing Barge with 380 brush motors ??
Drop down ramp for a tank etc.


The 380 motor drawn about 3Amps at 1400rpm on load.


Barge size 700mm long by 200mm with two 12 volt Gel cell batteries or 3S Lipo battery.


Canabus

Title: Re: Tank steering
Post by: ronnie42 on February 17, 2022, 11:56:07 am

HI canabus   Thats a good idea but i only do German WW2 tanks :((  they are bigger than the Shermans. Found this might be a little project as it could carry 140 tons. Would be able to carry 2 tigers or Panthers.(https://i.imgur.com/XoUWXL1.png)

Title: Re: Tank steering
Post by: Stan on February 17, 2022, 01:04:43 pm

HI Ronnie please see tech sheet for the 380 motor this is a high revving motor. You will have the fastest landing craft model on the pond.


The 380 motor drawn about 3Amps at 1400rpm on load. Not sure were these figures came from these are taken from the M F A Como site.


Power rating 3 volts to 7.2  no load speed 26.990 rpm  load speed 22. 356 rpm stall current at 7.2 volts 11.2 amps. These figures are for 380  see chart below [/size]

Title: Re: Tank steering
Post by: Stan on February 18, 2022, 09:04:44 am

Hi Ronnie the motor prop combination used in model boats will determine what speed controller you can use. Stall current on each motor must be taken into account. I have posted a further screen shot of the 385 motor these are used by many model builders.


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Title: Re: Tank steering
Post by: Stan on February 18, 2022, 09:17:44 pm

HI Ronnie I enjoyed our chat this evening. It would appear from our conversation that the landing craft you propose to build will need better motors than the 380 or 385 types. Geared motors could be the solution low revving but more torque especially for 50mm props. Lead acid batteries would be fine and also provide ballast. We both agreed a visit to your local club would pay dividends I hope all goes well with you project.


Stan. :-)) :-)) :-)) :-)) :-)) :-)) :-)) :-)) :-)) :-)) :-)) [size=78%] [/size]