Posted in Science, tagged Climate, climate physics, physics, physics of climate on Friday 2007.10.26 | No Comments »
Ray Pierrehumbert is writing a book on it, working name being The Climate Book and the work in progress is available online here. Link via Rabett Run.
Posted in Models, RLV:s on Tuesday 2007.10.23 | No Comments »
Made the powered landing analytical solution problem yesterday into a simulink model:
A 1000 kg vehicle coming in at 100 m/s decelerates at 20 m/s^2 in 5 seconds and 250 meters. The impulse needed is 130 000 Ns. (The model becomes unrealistic after 5 seconds since the vehicle starts moving up but the drag still points [...]
Posted in Science, Uncategorized on Monday 2007.10.15 | No Comments »
Still in light of the subject of the previous post, I really hope that ESAS or anyone else didn’t use 3D pie diagrams, they are the invention of the devil. When still a youngster, I at times worked as a summer intern doing all kinds of graphs and diagrams for a consulting company’s presentations (in [...]
Posted in RLV:s, Uncategorized on Monday 2007.10.15 | 1 Comment »
Jon Goff at Selenian Boondocks has some good words NASA’s lunar architecture’s overall mission safety and how it isn’t necessarily effective to concentrate too much on small parts that are already relatively safe.
I could add my own few formal cents in this, since the ESAS (or here) analysis done by NASA in 2005 didn’t release [...]
Posted in RLV:s, tagged equation, equations, landing, powered landing, RLV, rocket design, vertical landing, VTVL on Sunday 2007.10.07 | 1 Comment »
There was some excellent commentary in the last post, and that has partly been one inspiration in writing this post.
In the last part, the absolute minimum efforts by the launch vehicle making a vertical landing were determined. On top of these, there are lots of slightly more practical ones. This is still a one-dimensional [...]
Posted in RLV:s, Uncategorized, tagged equation, equations, landing, powered landing, RLV, rocket design, vertical landing, VTVL on Wednesday 2007.10.03 | 9 Comments »
There is a long standing dispute whether winged landing or vertical rocket powered landing is more efficient and overall better for reusable rockets on earth.
Powered landing can be looked at in a broad overview. The post documents what I doodled in my notebook some day in the summer.
Summary
Deceleration from terminal velocity to hover usually [...]
Posted in Uncategorized on Tuesday 2007.10.02 | No Comments »
The blog has been opened.
