Re: Mars Rover Windshield Wiper

"John Doe" <jdoe@xxxxxxx> wrote in message news:bbc8a$46b3d559$cef8887a$18523@xxxxxxxxxxxxxxx
John Crichton wrote:
the temperature on Mars can be as low as -220ºF. The differing thermal expansion coefficients of the component parts will cause mechanical stresses to set up which will cause breakage of the connections (solder joints, electric welds, etc.) which will render the electronics useless.


OK, this is a show stopper. Is there research being conducted in developping electronic components that can , when put together, widthstand the shrinkage at those winter temperatures ?

My guess is -- probably not. It is probably MUCH cheaper to keep your electronics "heated" to -55C than it is to make them survive temperatures lower than that.

Danny Deger

.

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