Friday just started in Mr. Wayne's World of southern Oklahoma. In fact it's not even 8:30 am yet; bankers and lawyers are still having their breakfast martinis.

You could at least give him until lunchtime before you conclude that he's all wet.

Quote from: seamus103 on October 18, 2012, 11:29:47 PM
So friday is drawing to a close in my part of the world and I'm off to local for a beer.
No sign of Mr Wayne's self imposed deadline being hit as yet. Time to write this off as a viable idea....?

Time to write it off? Certainly not for me. I still would like to make a spreadsheet on #2531 and better understand Mr. Wayne reaction to it #2534. Thank you for the directions Mr. Wayne.

Marcel

Maybe they meant _next_ Friday.

I finally got my system stable and repeatable enough to try and take some numbers.  I ran this experiment three times as accurately as possible and then ran the OU evaluation from post #2505.  My measured values were:

Lift Mass = 1000 g
Pressure Increase = (from 225 mm rise in input tube 'manometer') 22.5 g/cm²
Volume = 113 ml ( or cm³)
Stroke = 1.0 cm

This gives a comparative piston value of 113 cm³/1.0 cm = 113 cm².
At the measured volume that comparative piston would be able to lift 113 cm² x 22.5 g/cm² = 2540 g. 
Since my lift mass was only 1000 g this is underunity at 1000/2540 = 39.4%.

However, not all of the recorded volume went into the ZED to cause the measured lift.  Approximately 16 ml (or cm³) was used to raise the pressure and remained in the input tube.  This caused the 225 mm rise in the input tube water levels between top and bottom of the stroke.  So if this 16 ml is subtracted from the 113 ml the comparative piston value would be 97 cm³/1.0 cm = 97 cm².  The calculated mass that comparative piston would be able to lift is 97 cm² x 22.5 g/cm² = 2180 g.  This is also underunity at 1000/2180 = 45.9%.

Math checks and comments are appreciated.

M.

Quote from: mondrasek on October 20, 2012, 09:21:51 AM
I finally got my system stable and repeatable enough to try and take some numbers.  I ran this experiment three times as accurately as possible and then ran the OU evaluation from post #2505.  My measured values were:

Lift Mass = 1000 g
Pressure Increase = (from 225 mm rise in input tube 'manometer') 22.5 g/cm²
Volume = 113 ml ( or cm³)
Stroke = 1.0 cm

This gives a comparative piston value of 113 cm³/1.0 cm = 113 cm².
At the measured volume that comparative piston would be able to lift 113 cm² x 22.5 g/cm² = 2540 g. 
Since my lift mass was only 1000 g this is underunity at 1000/2540 = 39.4%.

However, not all of the recorded volume went into the ZED to cause the measure lift.  Approximately 16 ml (or cm³) was used to raise the pressure and remained in the input tube.  This caused the 225 mm rise in the input tube water levels between top and bottom of the stroke.  So if this 16 ml is subtracted from the 113 ml the comparative piston value would be 97 cm³/1.0 cm = 97 cm².  The measured volume that comparative piston would be able to lift is 97 cm² x 22.5 g/cm² = 2180 g.  This is also underunity at 1000/2180 = 45.9%.

Math checks and comments are appreciated.

M.

Hi M.

Nice, but could you list the size specifications of your model. You probably did it before, but it would save time as I would like to calculate the lift force and compare the calculated results to actual of your results to wildew's.

Thanks, Larry