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Normal Topic Determining the number of strands in rubber motors (Read 1456 times)
pb_guy
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Re: Determining the number of strands in rubber motors
Reply #5 - Mar 6th, 2019 at 5:12pm
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This is the worksheet on which that calculator is based. Perhaps it will work on your mac. No guarantees.
ian
  

Hode_sRubber_Motor_calculator.zip ( 5 KB | 17 Downloads )
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Sky9pilot
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Re: Determining the number of strands in rubber motors
Reply #4 - Mar 6th, 2019 at 3:27pm
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You'd have to contact that site for info regarding making it work on your mac.  I think you might zero out the numbers on the site, plug in your numbers and calc on the site for the results.  Just a thought!
Tom
  

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Re: Determining the number of strands in rubber motors
Reply #3 - Mar 6th, 2019 at 11:29am
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I found this calculator also
http://jchismar.com/peanutscale/calculating-scale-rubber-motor-sizes/
How ever I can't get it to work on my Mac
  
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Re: Determining the number of strands in rubber motors
Reply #2 - Jul 7th, 2017 at 5:51pm
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Thanks Ian for your Xcell prowess!!! Much appreciated!
Tom
  

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And ye shall know the truth, and the truth shall set you free. Jn 8:32
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pb_guy
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Re: Determining the number of strands in rubber motors
Reply #1 - Jul 7th, 2017 at 2:31pm
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If you want to play with the numbers, but the math is too daunting, I put together a spreadsheet to take the hard parts out. The yellow cells are for internal calculations. Don't enter anything there. The blue cells are where you put your data. I included a couple of spots for you to do metric to SAE conversions.
When it comes to the selections for rate of climb and single/double surfaces, only the first checked cell will count.

Modified Spreadsheet layout. Updated Version now attached.
ian
« Last Edit: Jul 8th, 2017 at 2:01am by pb_guy »  

Rubber_Motor_Calculator.zip ( 6 KB | 11 Downloads )
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Determining the number of strands in rubber motors
Jul 7th, 2017 at 10:33am
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Chas H Grant wrote this article for Free Flight Rubber Modelers to help them determine the number of strands needed to power their models.

It was posted in the Current Builds section by Mike/New Builder, July 7, 2017 for the Gene Duboise Gere Sport build.
Tom
  

( 127 KB | 18 Downloads )
Rubber_Motor_Calculator_4_001.jpg

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