Re: (ET) Elec-Trak ZTR

["Ralph G Vogan" <ralphgv CenturyTel net>]

    If you know the top speed of the tractor you should be able to figure the RPM of the motor at that speed in D2.  Calculate the number of feet it travels in 1 minute at that speed (FPM);  5280 X top speed then divided by 60 = FPM.  Measure the exact distance your tractor moves for 1 revolution of the back wheel (It dependes on the size of the tires), and divide that into the FPM.  This is the RPM of the drive wheel.  Multiply the wheel RPM by the gear ratio of D2 to get the MOTOR RPM at that speed. 

 

    By working backwords you can get close to the top speed in the other gears using their gear ratios.  Allthough the motor may run a little faster in those gears because it has less load on it. 

 

Ralph V
ralphgv centurytel net

----- Original Message -----

From: Elie, Larry (L.D.)

To: Mike Wallace ; Elec-trak Discussion Group

Sent: Monday, July 12, 2004 11:00 AM

Subject: RE: (ET) Elec-Trak ZTR

Good job.

 

Related question; but with the motor speed and tire diameter one could figure it out.  Does anyone know where there is a list of

nominal speeds for each gear, and motor speeds for each of the forward positions for E12 and E15?  There is overlap of

course, but I would like the real numbers.  The only ones I have ever seen was 'top-speed' (D2) and assuming it is max motor

speed.  With these ratios, I can now tell what max speed in each gear is, but I still haven't a clue as to motor speed at each

throttle position.  I don't really want to go to the trouble of a fancy tachometer, and there should be a chart somewhere.

 

Larry Elie

 

 

    LL - 266:1

      L -   90:1

    D1 -  50:1

    D2 -  34:1