Re: Thermodynamics of rubber bands

From: nick <nickaikman_at_hotmail.com>
Date: Wed, 23 Jun 2010 16:00:50 -0000

Bill,

In Belgrade, they wind slowly due to heat induced fatigue.

--- In Indoor_Construction_at_yahoogroups.com, "Bill Gowen" <wdgowen@...> wrote:
>
> Several years ago I made a comment on the FFML about how F1D flyers wind slowly to avoid heat buildup. I got roundly attacked for advancing such a preposterous idea to the guys who know everything about rubber.
>
> ----- Original Message -----
> From: tim.haywardbrown_at_...
> To: Indoor_Construction_at_yahoogroups.com
> Sent: Wednesday, June 23, 2010 6:40 AM
> Subject: [Indoor_Construction] Re: Thermodynamics of rubber bands
>
>
>
> > Temperature affects the elasticity of a rubber band in an unusual way.
> > Heating causes the rubber band to contract, and cooling causes
> > expansion.
>
> Don't F1B flyers use heating jackets to keep their (wound) motors warm on cold flying days? Does that make the rubber contract? And what does that do to the torque?
> Tim
>
Received on Wed Jun 23 2010 - 09:01:49 CEST