Hi
I want to compare power useage in a model boat after replacing a motor (brushed) with a brushless one. (I use arduino in my boats).

The battery is an old 6V lead acid, and the current is less than 20 amp. To make the trial solid I want to fit a 'circuit, or simple measuring system to my boat and sail it around a course at a set speed and then measure power useage. Then replace the motor etc and do the same to see what the difference is. I will then post a video about this for the model boating community.

What is the best way of doing this?

John

 

Hi
I want to compare power useage in a model boat after replacing a motor (brushed) with a brushless one. (I use arduino in my boats).

The battery is an old 6V lead acid, and the current is less than 20 amp. To make the trial solid I want to fit a 'circuit, or simple measuring system to my boat and sail it around a course at a set speed and then measure power useage. Then replace the motor etc and do the same to see what the difference is. I will then post a video about this for the model boating community.

What is the best way of doing this?

John

Since it is 2 different motors how do you know you will be going the same speed?

 

This may work for you.

 

Since it is 2 different motors how do you know you will be going the same speed?

I will do a few circuits and will manage the speed manually. I don't think there will be another way to do that

 

I will do a few circuits and will manage the speed manually. I don't think there will be another way to do that

I don't know how big it is, but how about this:
Tie the boat to a pier with a gauge that measures the pull (scale?)
Then you could just measure the motor current.

 

I will do a few circuits and will manage the speed manually. I don't think there will be another way to do that

My idea is no good as the motor will have different speed torque curves.
Carl's idea should work.

 

Ok thanks. I found a much cheaper one in Aus. All I need and a quick answer thanks!

 

Hi
I want to compare power useage in a model boat after replacing a motor (brushed) with a brushless one. (I use arduino in my boats).

The battery is an old 6V lead acid, and the current is less than 20 amp. To make the trial solid I want to fit a 'circuit, or simple measuring system to my boat and sail it around a course at a set speed and then measure power useage. Then replace the motor etc and do the same to see what the difference is. I will then post a video about this for the model boating community.

What is the best way of doing this?

John

 

Hi,new here, how do I post a thread to ask a question

 

Hi,new here, how do I post a thread to ask a question

At the top right of the appropriate forum page where is says Post New Thread.