Comments on: Xoie in the Wind http://selenianboondocks.com/2010/01/xoie-in-the-wind/ Random Musings from the Warped Minds of Jonathan Goff, Ken Murphy, John Hare, and Kirk Sorensen Thu, 29 Jul 2010 18:38:36 -0700 http://wordpress.org/?v=2.8.4 hourly 1 By: Ian http://selenianboondocks.com/2010/01/xoie-in-the-wind/comment-page-1/#comment-7290 Ian Wed, 03 Feb 2010 06:41:04 +0000 http://selenianboondocks.com/?p=1359#comment-7290 Jon, Hahaha. Did you mean I wrote ALL of the GN&C? (ACS is just the name). Joel and Dave wrote the original GFMS and OFMS. Some professional pride at play here ;) ian Jon,

Hahaha. Did you mean I wrote ALL of the GN&C? (ACS is just the name). Joel and Dave wrote the original GFMS and OFMS. Some professional pride at play here ;)

ian

]]> By: Jonathan Goff http://selenianboondocks.com/2010/01/xoie-in-the-wind/comment-page-1/#comment-7170 Jonathan Goff Sat, 30 Jan 2010 06:58:57 +0000 http://selenianboondocks.com/?p=1359#comment-7170 AM, Yeah, if VASIMR works out (along with a power source with enough power density to make it useful), they'd still need a chemical lander for ascent/descent purposes. If VASIMR works, it is only really useable for in-space maneuvers--not for landing or ascending from planetary surfaces. Way too low of a system T/W for that. ~Jon AM,
Yeah, if VASIMR works out (along with a power source with enough power density to make it useful), they’d still need a chemical lander for ascent/descent purposes. If VASIMR works, it is only really useable for in-space maneuvers–not for landing or ascending from planetary surfaces. Way too low of a system T/W for that.

~Jon

]]> By: A_M_Swallow http://selenianboondocks.com/2010/01/xoie-in-the-wind/comment-page-1/#comment-7168 A_M_Swallow Sat, 30 Jan 2010 01:03:44 +0000 http://selenianboondocks.com/?p=1359#comment-7168 NASA appears to be investigating a VASIMR tug to lunar orbit. A chemical propulsion lunar lander may be needed. NASA appears to be investigating a VASIMR tug to lunar orbit. A chemical propulsion lunar lander may be needed.

]]> By: O. Mandias http://selenianboondocks.com/2010/01/xoie-in-the-wind/comment-page-1/#comment-7105 O. Mandias Thu, 21 Jan 2010 18:35:06 +0000 http://selenianboondocks.com/?p=1359#comment-7105 Impressive. Impressive.

]]> By: Jonathan Goff http://selenianboondocks.com/2010/01/xoie-in-the-wind/comment-page-1/#comment-7096 Jonathan Goff Wed, 20 Jan 2010 15:57:17 +0000 http://selenianboondocks.com/?p=1359#comment-7096 Trent, IIIan wrote most of the ACS (attitude control system) code, with a little help from Dave and Joel on the OFMS and GFMS parts (on-board or ground flight management system), except the control loops on the servoactuators. The OFMS is what takes the raw commands from the ACS (hinge positions and throttle commands) and converts them into actual current flowing to motors. It also controls all the solenoids and pneumatic actuated valves, and gets all the sensor data. The GFMS is basically the pilot controls from the ground. ~Jon Trent,
IIIan wrote most of the ACS (attitude control system) code, with a little help from Dave and Joel on the OFMS and GFMS parts (on-board or ground flight management system), except the control loops on the servoactuators. The OFMS is what takes the raw commands from the ACS (hinge positions and throttle commands) and converts them into actual current flowing to motors. It also controls all the solenoids and pneumatic actuated valves, and gets all the sensor data. The GFMS is basically the pilot controls from the ground.

~Jon

]]> By: Trent Waddington http://selenianboondocks.com/2010/01/xoie-in-the-wind/comment-page-1/#comment-7093 Trent Waddington Wed, 20 Jan 2010 11:16:40 +0000 http://selenianboondocks.com/?p=1359#comment-7093 Fantastic work. Did Ken or Ian write that software or was it someone else? Fantastic work.

Did Ken or Ian write that software or was it someone else?

]]> By: Gary C Hudson http://selenianboondocks.com/2010/01/xoie-in-the-wind/comment-page-1/#comment-7086 Gary C Hudson Tue, 19 Jan 2010 17:36:23 +0000 http://selenianboondocks.com/?p=1359#comment-7086 The high altitude problem generally require flaps. At least, the trades have usually come out with flaps beating propulsive control. I like to combine the flaps and the gear doors, but each to their own tastes. The high altitude problem generally require flaps. At least, the trades have usually come out with flaps beating propulsive control. I like to combine the flaps and the gear doors, but each to their own tastes.

]]> By: Jonathan Goff http://selenianboondocks.com/2010/01/xoie-in-the-wind/comment-page-1/#comment-7079 Jonathan Goff Tue, 19 Jan 2010 04:57:10 +0000 http://selenianboondocks.com/?p=1359#comment-7079 It would've been cooler if it had been a free-flight or a ground takeoff and landing. But yeah, it still does kind of "take the wind out of" that argument, to use a lame pun. The trickier part is dealing with high altitude winds, and making sure you have either enough lift or thrust to deal with it without having your vehicle miss your landing pad. But we haven't gotten far enough into dealing with aerodynamics to know how difficult of a problem that will be. Maybe it's a non-problem. ~Jon It would’ve been cooler if it had been a free-flight or a ground takeoff and landing. But yeah, it still does kind of “take the wind out of” that argument, to use a lame pun. The trickier part is dealing with high altitude winds, and making sure you have either enough lift or thrust to deal with it without having your vehicle miss your landing pad. But we haven’t gotten far enough into dealing with aerodynamics to know how difficult of a problem that will be. Maybe it’s a non-problem.

~Jon

]]> By: Gary C Hudson http://selenianboondocks.com/2010/01/xoie-in-the-wind/comment-page-1/#comment-7078 Gary C Hudson Tue, 19 Jan 2010 04:23:43 +0000 http://selenianboondocks.com/?p=1359#comment-7078 Cross posted to Hobbyspace: One of the arguments from the 1970s and 1980s why VTOL landing on earth wouldn't work was "how do you deal with winds?" This was repeated time and against by opponents of the idea and held out as one of the key showstoppers. In response, I pointed out that if you could take off in a particular wind condition you could land in the same wind condition, but simple logic was overwhelmed by emotion. Its delightful to see the refutation of this silliness flying! Cross posted to Hobbyspace:

One of the arguments from the 1970s and 1980s why VTOL landing on earth wouldn’t work was “how do you deal with winds?” This was repeated time and against by opponents of the idea and held out as one of the key showstoppers. In response, I pointed out that if you could take off in a particular wind condition you could land in the same wind condition, but simple logic was overwhelmed by emotion.

Its delightful to see the refutation of this silliness flying!

]]>