And the PC showed Status Ready.    Now I need to figure out how to calibrate the torque sensor.

Tomorrow I will fab a new sensor mount for the toothed speed wheel.   And also fab my ramp mounts.     I am going to reuse the same ramps from my trailer since I know they are long enough and high enough load rating for most planned test and tune sessions.     

Progress.   

• Ramp install is solved but not implemented.  
• Speed sensor and new trigger wheel mounted.  
  • I drilled and tapped the outer perimeter of the existing trigger wheel and bolted the Yourdyno wheel directly do it.   
  • I also removed the existing VR sensor,  drilled out the mounting hole for the Yourdyno speed sensor, repositioned the bracket by brute force (bent) and installed the sensor in newly drilled hole.   It is now centered and normal (perpendicular) to the trigger wheel.  

I understand the calibration process for the load cell.  I have a design in mind for the load beam to hang weights.    But,  Do I apply my load to the torque cell in the same or opposite direction as the rotation?  The rotation direction results in a "pulling" upward motion on the strain gauge.   I assume I want the calibration load in the same direction.   

Second.   How do I get or calculate the MOI for the flyweel?  Can I use dimensions and steel density to get close enough?  Appreciate any help here.   

Thanks for all the support so far.  Pending calibration I can have the dyno running by next week.   

jamie

The Dyno is up and ready to run. 

the torque load cell was calibrated using a dumb bell weight hanging on a steel beam.  I used 2 C-clamps to hold it to the top of the fixed section of the eddy brake.  the beam made contact with the vertical center, was leveled in a tangent line.   The clamps were placed one on each side of the center line leaving a net zero load.   The measurements and spreadsheet made the process straightforward.   I applied the torque load in the rotation direction.   I get reasonable numbers when pushing on the beam and watching the torque readout in the software.  

The speed sensor is verified working.   I tried a bicycle but could not get it moving.  So I rolled with my feet in a "log rolling" style.   

the only thing I have not verified is the RPM sensor.   I will connect that once I have a vehicle strapped down and ready to test.  

Planning to move the dyno to a friends shop for the next phase.  

I