Wow, been a year since I've flown, and it shows. :-) My Garmin's most useful purpose in the last year was as a speedo calibrator for my kitcar. Cheers, -Neil. -----Original Message----- From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Jim Sent: Tuesday, June 18, 2002 9:47 PM To: PICLIST@MITVMA.MIT.EDU Subject: Re: [EE]: Autopilot landing system for model aircraft WAAS is alive and well - and serves to reduce errors even further than with just SA being turned off. A friend of mine just updated ('flashed') his Garmin with new S/W and gained WAAS capability. WAAS is a spread-spectrum signal occupying the same spectrum as the 'main' C/A code GPS signal. Jim ----- Original Message ----- From: "Pic Dude" To: Sent: Tuesday, June 18, 2002 9:37 PM Subject: Re: [PIC]: Autopilot landing system for model aircraft > Few thoughts.... > > (1) For small model airplanes, you'd need to make really, > really quick corrections to pull this off, and I'm not > sure if GPS (even 3) would be precise enough for that. > But I may be wrong here. > > (2) Ever heard of WAAS (Wide Area Augmentation System)? > Originally conceived & started development when SA was > still active. Not sure what ever happened with it though. > A quick google search for 'WAAS' should net you a lot of > good info though. Sounds like that's what you want > implement. > > (3) Sounds like a full autopilot system developing here, > so stay tuned for the paranoid responses, which I > probably have to agree with more here than for cruise > control. > > (4) A lot of electronics in one small plane. First up, > figure out roughly what electronics will be needed, then > pick a model plane that can handle that extra cargo. > Now figure out the price of that puppy, and if you can > afford it. > > (5) Speaking of affording it, you'll need to buy the > planes wholesale for the testing phase. :-) > > Cheers, > -Neil. > > -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.