Re: Motor Weight, Size Density, Torque ?

From: leop12345 <leop_at_lyradev.com>
Date: Fri, 04 Jun 2010 05:48:59 -0000

My kids in Science Olympiad helicopters this year kept ribbing me about using english units for torque and rubber dimensions. I found in their supplies an old IMS torque meter and we calibrated its reading. Low and behold, the meter dial numbers corresponded to milli-Newton-meters (that is one one thousandth of a N-m)! Lew Gitlow was ahead of his time. Just in case anyone wants to convert to metric, one oz-in is 7.06 milli-N-m. For the aspiring F1D and LPP fliers, on average a good F1D motor will wind to just over 4 milli-N-m while a good LPP motor will take a bit under 8 milli-N-m.

I may just make new dials for my torque meters in the near future. A torque meter that reads to 1.4 oz-in will read to 10 milli-N-m (actually .99 but 1% accuracy is good enough) in metric.

Leo P
Bloomington IN

--- In Indoor_Construction_at_yahoogroups.com, Fred or Judy Rash <frash@...> wrote:
>
> Assume a moment for sake of discussion that Bill Gowen will move to
> g/metre of rubber strip as he seems to be doing. Please further assume
> that all the rest of us will adopt the same system and we have a
> worldwide standard. (None of us believes that will happen, but assume
> for a moment.)
>
> Then what units should we all use for measuring torque?
>
> Fred Rash
>
Received on Thu Jun 03 2010 - 22:50:15 CEST