Dyno Design

[1337engie]

Hello,

I'm building a small dyno as a home project for low powered scooters and bikes.

I thinking of coupling the drum with a motor and simply reading the current drawn than using P=IR to find the power.

Or using a car brake with the housing attached to a lever arm and load cell.

Will this work? What size roller will i need? Any comments welcome.

Tim

 

[SomptingGuy]

Simple apart from the couplings. Or the roller assembly.

- Steve

 

[ScottyUK]

Thst's mechanical stuff.


----------------------------------

If we learn from our mistakes I'm getting a great education!

 

[PedroCG]

evelrod, you steel need to map rpm vs time and having a big and heavy drum of metal balanced and well secure may not be very simple. with some knoledge of electronics one could make the osciloscope system work fairly well and those things are like 150 bucks on ebay

 

[evelrod]

Again, Pedro, back to the OP...A small engine dyno...The one I described was utterly simple. The clutch device was mounted to the engine and was quite small. As I recall the scale looked like something from the grocery store. I don't remember exactly, but lets assume it was on a small fabricated frame of some sort. Again, this was for a small, single cylinder go kart engine and, yes, it worked well enough.

I'm guessing here, but I'd say the entire setup, including the engine was ~100 lbs. I would hazard a guess that a qualified engineer could easily accomplish something along these lines that could function in a repeatable manner without needing to "mortgage" the family home.

Rod

 

[PedroCG]

sorry, my bad, i understood rolling road as an inertia dyno, the system you described will most def be enough to compare before and after results

 

[thundair]

Try this;

http://www.dyno46.com/diydyno.html

Cheers

I don't know anything but the people that do.