CD,

Since you don't think Jay is an expert in thermodynamics, I'll join in here. I've posted my qualifications here before. As I've said before, it is clear to me that you and other HBs have no understanding of heat transfer, fluid mechanics and thermodynamics.

First of all, I have never worked in a department store or a factory (as a worker), but I have however worked for a large manufacturing company (General Motors) and to me your statements indicate that you never have worked on a large scale engineering project. You state that

Apollo work was compartmentalized so that no one person would have the whole picture.

If this statement is true, then how does someone like myself design the thermal control (cooling) system? I need the big picture so that I can design a system that meets everyone's needs. Just telling someone go ahead and design a cooling system that can reject X amount of heat would never happen. If that approach is taken, where would the cooling lines go? This applies to a car, house, rocket, or whatever needs heating or cooling.

If you knew heat transfer, you would know that heat transfer is extremely geometry dependent and the heat transfer people do need to know the big picture.

Next, your claim that the LM exhaust should have left scorch marks again indicates that no analysis was done to prove this statement. The time that the exhaust from the LM was in contact with the lunar surface is short less than 15 seconds, unlike the thousands of years for Mt Etna lava. The medium for heat transfer on the lunar surface is a gas, not the solid and liquids that create lava. How many times have you opened an oven with 150-300 C air inside and it doesn't scorch your face. Now would you put you hand in boiling 100C water. I doubt it. In other words, temperature is not the only factor in determining how an object responds to an applied heat load.

Finally, as has been pointed out to you many times, you are using the extreme surface temperatures to perform your film analysis. Since the moon has no atmosphere the use of these temperatures is inappropriate. The temperature of each object must be determined by a thermal analysis. This analysis is a fuction of the amount of solar energy an object recieves (and absorbs) from all sources, the amount of infrared energy it receives (and absorbs) from all sources, the amount of energy it rejects to deep space and the amount of heat removed by conduction. I've asked you before to provide a reference for the thermal analysis of the Hasselblad, but you haven't. Please do.

Thanks.


<font size=-1>[ This Message was edited by: jrkeller on 2002-06-29 11:02 ]</font>