Hi Bjorn, The car was Thrust-SSC, Design phase was late 1995, running 1996/7. We were limited on funds too. One unit we looked at was the Rockwell Jupiter, I just looked at the spec and can't see a speed limitation, but it was a problem at the time. Dispite the stories that it was a well funded effort, the whole project was hand to mouth with equipment being selected on availability as much as suitability. A lot of stuff was begged borrowed or removed from a skip (dumpster) ;-). I was responsible for the cockpit instrumentation, engine electrics, various other system bits and was part of the start/turnaround team that ran the car in Jordan and Blackrock Nevada. Robert G8RPI.
--- On Fri, 2/10/09, [email protected] <[email protected]> wrote: From: [email protected] <[email protected]> Subject: Re: [time-nuts] GPS from a window seat To: "Discussion of precise time and frequency measurement" <[email protected]> Date: Friday, 2 October, 2009, 1:00 PM Hi Robert, The limit is 515 m/s, 1000 knots or 1854 km/h. I presume your car did 1227 km/h, right? This is within CoCom limits. Then both altitude AND speed must be over the limit to break the rules. Where your car also driving over 18000m altitude? http://trl.trimble.com/docushare/dsweb/Get/Document-183796/13441+Resolution+FA2.pdf As for 1Hz... 20Hz and for some years even 50Hz and 100Hz GPS measurements has been available. Look at L1 OEM-boards from Novatel, Ashtech, Topcon, Javad etc. uBlox-5 receivers are often specified at 4Hz, <50km alt, <500m/s, <4g. -- Björn > Well Jim brought up cars, > I did look at using a GPS as a speed sensor for a car some time ago. The > 1000kPH limit (and 1s update rate) stopped that idea. The car > finally hit over 1227kph average. We used wheel speed and pitot pressure > in the end (plus external time & distance). > > Robert G8RPI _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
