Re: Re: Thermodynamics of rubber bands

From: Tapio Linkosalo <tapio.linkosalo_at_iki.fi>
Date: Wed, 23 Jun 2010 18:04:06 +0300

nick wrote:
>
>
> 'Above 40C (something over 100F) the rubber tends to get soft and break
> abruptly.'
>
> Aha - Belgrade temperature!!!

Yup. The temperature sensitivity varies from batch to batch, and the
best (like 1999) are most sensitive. I recall that way back then in F1B
Eurochamps 2000 I had prepared motors of May 1999 (it was ample then!)
for morning and fly-off -rounds, and had some motors from 1998 batch for
the heat of the day, as that latter batch was known to stand the heat
better. Quite needed, for in the afternoon the temperatures were above
40C in the shade, but no shade around on the open flying field! That was
one hot contest!



-Tapio-
Received on Wed Jun 23 2010 - 08:04:22 CEST