Thursday, November 01, 2012

Radioisotope Stirling Engine Powered Airship for Low Altitude Operation on Venus

nasa | The feasibility of a Stirling engine powered airship for the near surface exploration of Venus was evaluated. The heat source for the Stirling engine was limited to 10 general purpose heat source (GPHS) blocks. The baseline airship utilized hydrogen as the lifting gas and the electronics and payload were enclosed in a cooled insulated pressure vessel to maintain the internal temperature at 320 K and 1 Bar pressure. The propulsion system consisted of an electric motor driving a propeller. An analysis was set up to size the airship that could operate near the Venus surface based on the available thermal power. The atmospheric conditions on Venus were modeled and used in the analysis. The analysis was an iterative process between sizing the airship to carry a specified payload and the power required to operate the electronics, payload and cooling system as well as provide power to the propulsion system to overcome the drag on the airship. A baseline configuration was determined that could meet the power requirements and operate near the Venus surface. From this baseline design additional trades were made to see how other factors affected the design such as the internal temperature of the payload chamber and the flight altitude. In addition other lifting methods were evaluated such as an evacuated chamber, heated atmospheric gas and augmented heated lifting gas. However none of these methods proved viable.


DD said...

DD said...


I joke that HT is the Oracle, and I kinda joke that you are the Sensei. Though I mean it too.

So I have a serious question.

Why do you think the Oracle never answers your questions? You occasionally ignore mine, but it's rare. He often answers idiots in his imperial way, but I don't think he's ever answered one of yours.

I ask sincerely, do you ever muse on this and have a theory? I think you have captured my email at some point, but I'd be willing to post it if you'd wipe it shortly thereafter.

CNu said...

Respect. It's not that the answers aren't important DD, rather, what is even more important is the work of seeking to obtain the answers.

Israel Cannot Lie About Or Escape It's Conspicuous Kinetic Vulnerability

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