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Astronomy Picture of the Day

NASA Image of the Day

Curiosity at 'Cumberland'

 
NASA's Mars rover Curiosity used its front left Hazard-Avoidance Camera for this image of the rover's arm over the drilling target "Cumberland" during the 275th Martian day, or sol, of the rover's work on Mars (May 15, 2013). The rover team plans to use Curiosity's drill to collect a powdered sample from the interior of the rock for analysis by laboratory instruments inside the rover. This is the mission's second rock-drilling target. The rover drove from its position beside the first drilling target, "John Klein," to its position beside Cumberland with drives of 121 inches (308 centimeters) on Sol 273 (May 13) and 26.6 inches (67.5 centimeters) on Sol 275. Curiosity's total odometry on Mars is now 2,385 feet (727 meters). Image credit: NASA/JPL-Caltech
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Sorting Ullage Rockets and Retro Rockets

Which craft do I model: Apollo 8, 9, 11, 13, or 15? Not so trivial a decision, if I really want to have a reasonably accurate model. The S-IC stages had retro rockets. All of these missions used 8, except for Apollo 15, which used only 4. Some of the S-II stages used ullage rockets: [...]

4TNC Flight Report

4TNC turned out pretty well! A B4-2 had the right delay, but not quite enough thrust. The flight seemed to be, well, mushing (in the sense that an airplane can be mushing: descending on the back side of the power curve, not stalled, but not exactly flying well) for about 10m after clearing the launch [...]

4TNC

What do you do when you want to build a rocket quickly, for a tight launch deadline, and you don’t have any kits available that fit the bill, and you want something just a little different? How about a variant on the standby 3FNC and 4FNC designs: 4TNC, using tubes instead of fins? Yup, 4 [...]

Out of Planned Hold

Out of the planned hold, for about a week now. Minor diversion to get a new rocket designed and built in time for this Saturday’s LUNAR launch at Moffett Federal Airfield. Despite the diversion, work continues on the Saturn V. The primary structure of the lower section of the rocket is completed. Along the way, [...]

Planned Hold

T minus who-knows-how-much and holding. We’re in a planned hold, a construction hiatus due to other planned activities. The shock cord is on the motor mount, though, and the aft motor mount centering ring is ready for installation. The after motor retainer has arrived (addition to kit); I’ll install that as I install the after [...]