Hi there, I am using a T200 for a project and don’t have access to a flow meter and would like to know if there is a way to simply calculate the flow rate of the T200 Thruster at a certain thrust. For example at 12V and 4.6A (according to the graphs on the store page) the thruster generates about 5…

Hi @Josh_Huysamen , We don’t currently have the tools and not yet measured the flow rate or flow speed of our thrusters. However, you are right that with some estimates and math we can get to a reasonable rough theoretical value for these, at least under ideal conditions. The T200 propeller has a 7…

Hi @adam Thank you for such an informative response, it is much appreciated. I only needed rough estimates and this will definitely help. I would just like to ask if the flow rate would be a linear change with a change in RPM? Thanks again

Glad to help! Yes, flow rate will be linear with a change in RPM.

Hi again @adam Might be a simple question but is the RPM also linear to the PWM signal? So for instance will the RPM change linearly between the reverse PWM range of 1100us - 1500us? (I am trying to figure out what RPM the motor is running at a certain PWM, so i can then roughly calculate the flow…

Hi Joshua, Take a look in this post, this may be useful for you: [image] T200 PWM to RPM conversion Thrusters and Motors How would I be able to determine the relationship between the PWM and RPM? It looks to be exponential if I graph it. Would that be the best way to dete…

Hi @adam . Thanks for the calculation. It is very informative. My question is does this calculation is made for 16V, 24A, 390 W values? Thanks.

Hai Adam, Thank you theoretical maximum flow speed calculation. Can you please give the step by step calculation using pitch and rpm… somewhere I saw pitch into rpm multiplication but here pitch in degrees… how can we convert this into inches… I am electronics background, didn’t know the much deta…

Hi @shakeera , [image] shakeera: Can you please give the step by step calculation using pitch and rpm… somewhere I saw pitch into rpm multiplication but here pitch in degrees… The “pitch” being discussed here is the pitch angle of a single blade relative to the rotation plane of the propeller…

Dear Eliot, Thank you so much for the detailed explanation. It helps a lot to understand the flow speed calculations.

Flow rate/s for T200?

Blue Robotics Products Thrusters and Motors

patrickelectric (Patrick José Pereira) January 24, 2019, 11:51am 6

Hi Joshua,

Take a look in this post, this may be useful for you:

Doing some fitting with a linear equation, you can find that RPM/PWM can be approximately linear, but it depends if the margin of error is ok for you.

A 3rd order one could be more precise for you:

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Flow rate/s for T200?

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