Re: Motor weight, size density?

From: gerard moore <grrd_moore_at_yahoo.co.uk>
Date: Wed, 2 Jun 2010 21:00:58 +0000 (GMT)

Hi.

I agree with  the latest posts on this subject. In the UK I think that most fliers use  grams / meter  now for the rubber prior to being made up into motors. This makes stripping rubber easier and eliminates rounding errors that would appear if converting from one system to another. ( ie measure in meters and weigh in grams) Its hard enough measuring the thickness of the strip reliably in the first place!

This gives us an easy comparison to our European neighbours and fits in with the FAI class rules that are written in grams and meters ( or centimeters). Ditto for the units that we use to measure torque, (grams/cm).

We do still prefer to have our wood sizes and density in the good old imperial (american) units!

Ps:  Hats Off to Mr Kagan for his efforts on the US nats. That man deserves a prize for promoting the hobby so successfully.






 



________________________________
From: olbill61 <wdgowen_at_gmail.com>
To: Indoor_Construction_at_yahoogroups.com
Sent: Wed, 2 June, 2010 17:41:19
Subject: [Indoor_Construction] Motor weight, size density?

 
I'm wondering if there is any way of describing motor weight per unit length that is more prevalent than others. The way I started out is by dividing total weight of a finished motor in grams by the motor length in inches. I think Kang has started using grams per inch for untied strip. I think Leo is using grams per meter.

Can any others who have switched to weight per unit length describe how they do it? I'm early in the process of doing it this way and could switch to a different system without much trouble. I'd like to hear from English and European fliers also.





      
Received on Wed Jun 02 2010 - 14:01:04 CEST