From jeffmensch at sympatico.ca Sun Jun 1 12:44:28 2008 From: jeffmensch at sympatico.ca (Jeff Mensch) Date: Sun, 01 Jun 2008 15:44:28 -0400 Subject: [ARTS] Hybrid Motor Characterization In-Reply-To: <6.2.3.4.2.20080527103934.0873d5b0@mail.privatedata.com> References: <002b01c8bddf$d44c3560$0400a8c0@MainPC> <6.2.3.4.2.20080527103934.0873d5b0@mail.privatedata.com> Message-ID: <4842FC1C.7040700@sympatico.ca> Hi Mike, A friend of mine used his ARTS2 to test fly an K350 EX hybrid motor. The motor thrust trace matched the simulation fairly well but the motor analysis summary was way off for burn time and specific impulse. He was not able to get an accurate liftoff weight before the flight so this likely threw off the numbers. Actual function of the ARTS2 for apogee detect and main chute deployment were perfect. We're going to test fly this one again and see if things match up better. I did a flight using a CTI H400 Vmax motor (with correct liftoff weight) and got some strange results initially. The default analysis was way off, however the thrust curve matched almost perfectly. After adjusting the burn time to match the measured thrust curve and reducing the ISP to match what was published by CTI, the ARTS summary lined up well. _CTI Stats_ Burn: 0.64 s Max Thrust: 448 N Ave Thrust: 396 N Total Impulse: 255 Ns Rating : H400 _ARTS2 Analysis_ Burn: 0.68 s Max Thrust: 499 N (spike at start, actual max is 430 N) Ave Thrust: 375 N Total Impulse: 255 Ns Rating : H375 The down side is that you need to know what your specific impulse is before the flight which may be impossible when flying an EX motor. This feature may take a lot more testing to get the hang off it. Having some instructions in the manual would be a big help. Lets start sharing our flight information and maybe we can develop a technique for getting consistent results. Jeff Mike Harris wrote: > ARTS Hybrid Flyers, > > Does the ARTS accurately and consistently characterize your hybrid > motor flights? > > I'm guessing we'd need to run at max sampling (200hz) to minimize > aliasing. But are flights accurately characterized? Are readings or > behaviour ever squirrely? > > Either way - which motor? I know some are more prone to higher > frequency oscillations (large HT?) that had aliasing issues with > other altimeters a few years back. > > ARTS2 if it makes a difference? > > I ask for a couple reasons. > 1) reliability as primary altimeter for any (including) EX hybrid motor flights > 2) consistent characterization of hybrid motor flights > > Thanks! Mike > > _______________________________________________ > ARTS mailing list > ARTS at lokiresearch.com > http://mx1.blastzone.com/mailman/listinfo/arts > > From mike.roberts at mikerobe.org Mon Jun 2 11:57:45 2008 From: mike.roberts at mikerobe.org (Mike Roberts) Date: Mon, 02 Jun 2008 19:57:45 +0100 Subject: [ARTS] Telemetry Frequency changes? In-Reply-To: <4842FC1C.7040700@sympatico.ca> References: <002b01c8bddf$d44c3560$0400a8c0@MainPC>, <6.2.3.4.2.20080527103934.0873d5b0@mail.privatedata.com>, <4842FC1C.7040700@sympatico.ca> Message-ID: <484450B9.21358.1862B4D@mike.roberts.mikerobe.org> Hi, I was looking at the telemetry modules, ARTS TX-900G and ARTS RX-900. Unfortunately 900Mhz is used which over in the UK (and the rest of europe too I suspect) isnt a licence exempt band. Over here it is 866Mhz. Would it be possible to remove the 900Mhz TX and RX modules and replace them with 866 units? Assuming that the modules are effectively a radio modem pair of units? Which take RS232 or TTL in from the microcontroller on the ARTS2, encode, transmit, decode and output RS232 or TTL at the receiver end to pass in to the usb interface on the receiver. Would this be an unacceptable modification of the units? Cheers Mike 8-{> From news at rocketryplanet.com Mon Jun 2 15:26:08 2008 From: news at rocketryplanet.com (Planet News) Date: Mon, 2 Jun 2008 18:26:08 -0400 Subject: [ARTS] Telemetry Frequency changes? In-Reply-To: <484450B9.21358.1862B4D@mike.roberts.mikerobe.org> References: <002b01c8bddf$d44c3560$0400a8c0@MainPC>, <6.2.3.4.2.20080527103934.0873d5b0@mail.privatedata.com>, <4842FC1C.7040700@sympatico.ca> <484450B9.21358.1862B4D@mike.roberts.mikerobe.org> Message-ID: <001a01c8c4ff$a8814d90$6400a8c0@HPPAVILION> Perhaps Loki could offer 866Mhz units for UK customers? > -----Original Message----- > From: arts-bounces at lokiresearch.com [mailto:arts-bounces at lokiresearch.com] > On Behalf Of Mike Roberts > Sent: Monday, June 02, 2008 2:58 PM > To: arts at lokiresearch.com > Subject: [ARTS] Telemetry Frequency changes? > > > Hi, > > I was looking at the telemetry modules, ARTS TX-900G and ARTS RX-900. > Unfortunately 900Mhz is used which over in the UK (and the rest of > europe too I suspect) isnt a licence exempt band. Over here it is > 866Mhz. Would it be possible to remove the 900Mhz TX and RX modules > and replace them with 866 units? Assuming that the modules are > effectively a radio modem pair of units? Which take RS232 or TTL in > from the microcontroller on the ARTS2, encode, transmit, decode and > output RS232 or TTL at the receiver end to pass in to the usb > interface on the receiver. > > Would this be an unacceptable modification of the units? > > Cheers Mike 8-{> > > > _______________________________________________ > ARTS mailing list > ARTS at lokiresearch.com > http://mx1.blastzone.com/mailman/listinfo/arts From mike.roberts at mikerobe.org Mon Jun 2 16:00:59 2008 From: mike.roberts at mikerobe.org (Mike Roberts) Date: Tue, 03 Jun 2008 00:00:59 +0100 Subject: [ARTS] Telemetry Frequency changes? In-Reply-To: <001a01c8c4ff$a8814d90$6400a8c0@HPPAVILION> References: <002b01c8bddf$d44c3560$0400a8c0@MainPC>, <484450B9.21358.1862B4D@mike.roberts.mikerobe.org>, <001a01c8c4ff$a8814d90$6400a8c0@HPPAVILION> Message-ID: <484489BB.3535.264DAA0@mike.roberts.mikerobe.org> > Perhaps Loki could offer 866Mhz units for UK customers? I did ask about doing an EU variant quite some time ago. If I remember correclty there was some discussion when the, then underdevelopment, telemetry module was announced on this list. There were and are a number of modules available in interchangeble drop in replacement packages in both 866 and 900 Mhz frequencies. Just for such international interchangeability. However I would guess that the EU market is too small to warrant an 866 variant. Which is why I was wondering if it would be feasable to buy the units and mod them over here at my own expense. Mike 8-{> > > > -----Original Message----- > > From: arts-bounces at lokiresearch.com [mailto:arts-bounces at lokiresearch.com] > > On Behalf Of Mike Roberts > > Sent: Monday, June 02, 2008 2:58 PM > > To: arts at lokiresearch.com > > Subject: [ARTS] Telemetry Frequency changes? > > > > > > Hi, > > > > I was looking at the telemetry modules, ARTS TX-900G and ARTS RX-900. > > Unfortunately 900Mhz is used which over in the UK (and the rest of > > europe too I suspect) isnt a licence exempt band. Over here it is > > 866Mhz. Would it be possible to remove the 900Mhz TX and RX modules > > and replace them with 866 units? Assuming that the modules are > > effectively a radio modem pair of units? Which take RS232 or TTL in > > from the microcontroller on the ARTS2, encode, transmit, decode and > > output RS232 or TTL at the receiver end to pass in to the usb > > interface on the receiver. > > > > Would this be an unacceptable modification of the units? > > > > Cheers Mike 8-{> > > > > > > _______________________________________________ > > ARTS mailing list > > ARTS at lokiresearch.com > > http://mx1.blastzone.com/mailman/listinfo/arts > > _______________________________________________ > ARTS mailing list > ARTS at lokiresearch.com > http://mx1.blastzone.com/mailman/listinfo/arts > > > > -- > No virus found in this incoming message. > Checked by AVG. > Version: 7.5.524 / Virus Database: 269.24.4/1476 - Release Date: 31/05/2008 12:25 > From greg at blastzone.com Mon Jun 2 16:17:09 2008 From: greg at blastzone.com (Greg Deputy) Date: Mon, 2 Jun 2008 16:17:09 -0700 Subject: [ARTS] Telemetry Frequency changes? In-Reply-To: <484489BB.3535.264DAA0@mike.roberts.mikerobe.org> References: <002b01c8bddf$d44c3560$0400a8c0@MainPC>, <484450B9.21358.1862B4D@mike.roberts.mikerobe.org>, <001a01c8c4ff$a8814d90$6400a8c0@HPPAVILION> <484489BB.3535.264DAA0@mike.roberts.mikerobe.org> Message-ID: <0d8e01c8c506$c7eb4760$57c1d620$@com> I work with the maxstream radios on a different front, and we have this issue with EU customers. Maxstream offers 2.4ghz radios for those markets, and they're a direct drop in replacement for the 900mhz ones. The range is not as good as the 900mhz, though. -----Original Message----- From: arts-bounces at lokiresearch.com [mailto:arts-bounces at lokiresearch.com] On Behalf Of Mike Roberts Sent: Monday, June 02, 2008 4:01 PM To: arts at lokiresearch.com Subject: Re: [ARTS] Telemetry Frequency changes? > Perhaps Loki could offer 866Mhz units for UK customers? I did ask about doing an EU variant quite some time ago. If I remember correclty there was some discussion when the, then underdevelopment, telemetry module was announced on this list. There were and are a number of modules available in interchangeble drop in replacement packages in both 866 and 900 Mhz frequencies. Just for such international interchangeability. However I would guess that the EU market is too small to warrant an 866 variant. Which is why I was wondering if it would be feasable to buy the units and mod them over here at my own expense. Mike 8-{> > > > -----Original Message----- > > From: arts-bounces at lokiresearch.com [mailto:arts-bounces at lokiresearch.com] > > On Behalf Of Mike Roberts > > Sent: Monday, June 02, 2008 2:58 PM > > To: arts at lokiresearch.com > > Subject: [ARTS] Telemetry Frequency changes? > > > > > > Hi, > > > > I was looking at the telemetry modules, ARTS TX-900G and ARTS RX-900. > > Unfortunately 900Mhz is used which over in the UK (and the rest of > > europe too I suspect) isnt a licence exempt band. Over here it is > > 866Mhz. Would it be possible to remove the 900Mhz TX and RX modules > > and replace them with 866 units? Assuming that the modules are > > effectively a radio modem pair of units? Which take RS232 or TTL in > > from the microcontroller on the ARTS2, encode, transmit, decode and > > output RS232 or TTL at the receiver end to pass in to the usb > > interface on the receiver. > > > > Would this be an unacceptable modification of the units? > > > > Cheers Mike 8-{> > > > > > > _______________________________________________ > > ARTS mailing list > > ARTS at lokiresearch.com > > http://mx1.blastzone.com/mailman/listinfo/arts > > _______________________________________________ > ARTS mailing list > ARTS at lokiresearch.com > http://mx1.blastzone.com/mailman/listinfo/arts > > > > -- > No virus found in this incoming message. > Checked by AVG. > Version: 7.5.524 / Virus Database: 269.24.4/1476 - Release Date: 31/05/2008 12:25 > _______________________________________________ ARTS mailing list ARTS at lokiresearch.com http://mx1.blastzone.com/mailman/listinfo/arts From mike.roberts at mikerobe.org Mon Jun 2 16:34:52 2008 From: mike.roberts at mikerobe.org (Mike Roberts) Date: Tue, 03 Jun 2008 00:34:52 +0100 Subject: [ARTS] Telemetry Frequency changes? In-Reply-To: <0d8e01c8c506$c7eb4760$57c1d620$@com> References: <002b01c8bddf$d44c3560$0400a8c0@MainPC>, <484489BB.3535.264DAA0@mike.roberts.mikerobe.org>, <0d8e01c8c506$c7eb4760$57c1d620$@com> Message-ID: <484491AC.29007.283E24A@mike.roberts.mikerobe.org> > I work with the maxstream radios on a different front, and we have this > issue with EU customers. Maxstream offers 2.4ghz radios for those markets, > and they're a direct drop in replacement for the 900mhz ones. The range is > not as good as the 900mhz, though. I did see the 2.4 gig units while looking up the details of the 900Mhz units. We use 2.4gig for video down linking. Also increasingly for radio control aircraft(we have a keen hybrid powered boost glider flyer at our club.) I assume the 2.4gig units are spread spectrum also so shouldn't interfere with either of these uses? The advantage of an 866 unit is that no one is using that for anything else at rocketry events yet so we could be certain we were'nt going to tread on any other radio spectrum user's toes. (433 being in use for telemetry (RDAS units) and tracking) Cheers Mike 8-{> > > -----Original Message----- > From: arts-bounces at lokiresearch.com [mailto:arts-bounces at lokiresearch.com] > On Behalf Of Mike Roberts > Sent: Monday, June 02, 2008 4:01 PM > To: arts at lokiresearch.com > Subject: Re: [ARTS] Telemetry Frequency changes? > > > Perhaps Loki could offer 866Mhz units for UK customers? > > I did ask about doing an EU variant quite some time ago. If I > remember correclty there was some discussion when the, then > underdevelopment, telemetry module was announced on this list. There > were and are a number of modules available in interchangeble drop in > replacement packages in both 866 and 900 Mhz frequencies. Just for > such international interchangeability. However I would guess that the > EU market is too small to warrant an 866 variant. Which is why I was > wondering if it would be feasable to buy the units and mod them over > here at my own expense. > > Mike 8-{> > > > > > > -----Original Message----- > > > From: arts-bounces at lokiresearch.com > [mailto:arts-bounces at lokiresearch.com] > > > On Behalf Of Mike Roberts > > > Sent: Monday, June 02, 2008 2:58 PM > > > To: arts at lokiresearch.com > > > Subject: [ARTS] Telemetry Frequency changes? > > > > > > > > > Hi, > > > > > > I was looking at the telemetry modules, ARTS TX-900G and ARTS RX-900. > > > Unfortunately 900Mhz is used which over in the UK (and the rest of > > > europe too I suspect) isnt a licence exempt band. Over here it is > > > 866Mhz. Would it be possible to remove the 900Mhz TX and RX modules > > > and replace them with 866 units? Assuming that the modules are > > > effectively a radio modem pair of units? Which take RS232 or TTL in > > > from the microcontroller on the ARTS2, encode, transmit, decode and > > > output RS232 or TTL at the receiver end to pass in to the usb > > > interface on the receiver. > > > > > > Would this be an unacceptable modification of the units? > > > > > > Cheers Mike 8-{> > > > > > > > > > _______________________________________________ > > > ARTS mailing list > > > ARTS at lokiresearch.com > > > http://mx1.blastzone.com/mailman/listinfo/arts > > > > _______________________________________________ > > ARTS mailing list > > ARTS at lokiresearch.com > > http://mx1.blastzone.com/mailman/listinfo/arts > > > > > > > > -- > > No virus found in this incoming message. > > Checked by AVG. > > Version: 7.5.524 / Virus Database: 269.24.4/1476 - Release Date: > 31/05/2008 12:25 > > > > > _______________________________________________ > ARTS mailing list > ARTS at lokiresearch.com > http://mx1.blastzone.com/mailman/listinfo/arts > > > > > -- > No virus found in this incoming message. > Checked by AVG. > Version: 7.5.524 / Virus Database: 269.24.4/1476 - Release Date: 31/05/2008 12:25 > From mike.roberts at mikerobe.org Tue Jun 3 16:22:28 2008 From: mike.roberts at mikerobe.org (Mike Roberts) Date: Wed, 04 Jun 2008 00:22:28 +0100 Subject: [ARTS] Metric? Message-ID: <4845E044.20404.79EDE1E@mike.roberts.mikerobe.org> Back in December 2003 I replied to an email from Jeff to this list announcing the then latest release of Data Analyzer and also asking for any features we would like to see in a future release of Data Analyzer. In my reply I included:- "2) Metric units please. Us Brits and other Europeans are all metric these days. The temperature in Centigrade, Rocket Length in mm, Dia in mm, pressure in Pascals or mBar." I've just been playing with the latest release 1.6.1. It sill only has Farenheight, ft/s and the like. Please, please, please, could we have metric as well as imperial units in the next version? m/s and m/s^2 for velocity and acceleration would be nice too. Cheers Mike 8-{> From news at rocketryplanet.com Sat Jun 7 18:12:03 2008 From: news at rocketryplanet.com (Planet News) Date: Sat, 7 Jun 2008 21:12:03 -0400 Subject: [ARTS] ARTS default settings... Message-ID: <000601c8c904$a9fd48a0$6400a8c0@HPPAVILION> Is the default settings for profile one of the ARTS the 0.0 at apogee and 800 feet above the ground for the main? -------------- next part -------------- An HTML attachment was scrubbed... URL: http://mx1.blastzone.com/pipermail/arts/attachments/20080607/16bdf203/attachment.htm From jeff at lokiresearch.com Sun Jun 8 08:04:22 2008 From: jeff at lokiresearch.com (Jeff Taylor) Date: Sun, 08 Jun 2008 11:04:22 -0400 Subject: [ARTS] ARTS default settings... In-Reply-To: <000601c8c904$a9fd48a0$6400a8c0@HPPAVILION> References: <000601c8c904$a9fd48a0$6400a8c0@HPPAVILION> Message-ID: <484BF4F6.4040107@lokiresearch.com> An HTML attachment was scrubbed... URL: http://mx1.blastzone.com/pipermail/arts/attachments/20080608/f218e3ee/attachment.htm From beharri at speakeasy.net Sun Jun 8 08:18:27 2008 From: beharri at speakeasy.net (Bruce E. Harris) Date: Sun, 08 Jun 2008 11:18:27 -0400 Subject: [ARTS] Shunting switch Message-ID: <484BF843.2030906@speakeasy.net> All, Following the TRA list regarding shunting switches, I would like to ask an ARTS II specific question. Is a shunting switch with ARTS just another unnecessary point of failure? Would only a power switch provide enought safty? Best Regards, Bruce -- Bruce E. Harris, MSgt, USAF, ret. TRA #10564 L2 MDRA member "If it ain't broke, your not trying" Red Green From news at rocketryplanet.com Sun Jun 8 16:30:25 2008 From: news at rocketryplanet.com (Planet News) Date: Sun, 8 Jun 2008 19:30:25 -0400 Subject: [ARTS] ARTS default settings... In-Reply-To: <484C5CAF.30800@lokiresearch.com> References: <000601c8c904$a9fd48a0$6400a8c0@HPPAVILION> <484BF4F6.4040107@lokiresearch.com> <007901c8c989$0af94530$6400a8c0@HPPAVILION> <484C5CAF.30800@lokiresearch.com> Message-ID: <00bc01c8c9bf$a170f450$6400a8c0@HPPAVILION> I want to fly it next weekend and haven't been able to locate a USB-to-Serial adapter yet in this backwater burg I live in. ;-) All of the eBay sellers want 7-14 days, I guess they want to send it pony express. Can anyone make any eBay recommendations? But I think you are correct about the 800 feet, as that's what's Data Analyzer 1.5 says in the default installation. _____ From: Jeff Taylor [mailto:jeff at lokiresearch.com] Sent: Sunday, June 08, 2008 6:27 PM To: Planet News Subject: Re: [ARTS] ARTS default settings... Honestly, I don't recall for sure what the defaults were on the older model. It might have been 800 feet. But what's the big deal? Just program it to whatever you want. -J Planet News wrote: And the ARTS1 is the same? _____ From: Jeff Taylor [mailto:jeff at lokiresearch.com] Sent: Sunday, June 08, 2008 11:04 AM To: Planet News Cc: arts at lokiresearch.com Subject: Re: [ARTS] ARTS default settings... Planet News wrote: Is the default settings for profile one of the ARTS the 0.0 at apogee and 800 feet above the ground for the main? The current defaults for the ARTS2 are: Profile 1: channel one (apogee) fires at apogee, channel two (main) fires at 500 feet. Profile 2: channel one (apogee) fires at apogee, channel two (main) fires at 1000 feet. -JT -------------- next part -------------- An HTML attachment was scrubbed... URL: http://mx1.blastzone.com/pipermail/arts/attachments/20080608/86880d66/attachment.htm From jeff at lokiresearch.com Mon Jun 9 06:25:42 2008 From: jeff at lokiresearch.com (Jeff Taylor) Date: Mon, 09 Jun 2008 09:25:42 -0400 Subject: [ARTS] [Fwd: Metric?] Message-ID: <484D2F56.9050001@lokiresearch.com> -------------- next part -------------- An embedded message was scrubbed... From: "Mike Roberts" Subject: [ARTS] Metric? Date: Wed, 04 Jun 2008 00:22:28 +0100 Size: 3575 Url: http://mx1.blastzone.com/pipermail/arts/attachments/20080609/9baccb38/attachment.eml From news at rocketryplanet.com Wed Jun 11 11:33:38 2008 From: news at rocketryplanet.com (Planet News) Date: Wed, 11 Jun 2008 14:33:38 -0400 Subject: [ARTS] ARTS default settings... In-Reply-To: <00bc01c8c9bf$a170f450$6400a8c0@HPPAVILION> References: <000601c8c904$a9fd48a0$6400a8c0@HPPAVILION><484BF4F6.4040107@lokiresearch.com><007901c8c989$0af94530$6400a8c0@HPPAVILION><484C5CAF.30800@lokiresearch.com> <00bc01c8c9bf$a170f450$6400a8c0@HPPAVILION> Message-ID: <005801c8cbf1$aba78ae0$6400a8c0@HPPAVILION> I picked up a USB-to-Serial cable today and got the thing hooked up. I am having problems with the firmware update. The link http://lokiresearch.com/Programs/ARTS_FW_V1_61.ofw returns a 404 error. The firmware file in the zip file containing DataAnalyzer v1.61 returns a checksum of "0xce1a". What do I do? _____ From: arts-bounces at lokiresearch.com [mailto:arts-bounces at lokiresearch.com] On Behalf Of Planet News Sent: Sunday, June 08, 2008 7:30 PM To: arts at lokiresearch.com Subject: Re: [ARTS] ARTS default settings... I want to fly it next weekend and haven't been able to locate a USB-to-Serial adapter yet in this backwater burg I live in. ;-) All of the eBay sellers want 7-14 days, I guess they want to send it pony express. Can anyone make any eBay recommendations? But I think you are correct about the 800 feet, as that's what's Data Analyzer 1.5 says in the default installation. _____ From: Jeff Taylor [mailto:jeff at lokiresearch.com] Sent: Sunday, June 08, 2008 6:27 PM To: Planet News Subject: Re: [ARTS] ARTS default settings... Honestly, I don't recall for sure what the defaults were on the older model. It might have been 800 feet. But what's the big deal? Just program it to whatever you want. -J Planet News wrote: And the ARTS1 is the same? _____ From: Jeff Taylor [mailto:jeff at lokiresearch.com] Sent: Sunday, June 08, 2008 11:04 AM To: Planet News Cc: arts at lokiresearch.com Subject: Re: [ARTS] ARTS default settings... Planet News wrote: Is the default settings for profile one of the ARTS the 0.0 at apogee and 800 feet above the ground for the main? The current defaults for the ARTS2 are: Profile 1: channel one (apogee) fires at apogee, channel two (main) fires at 500 feet. Profile 2: channel one (apogee) fires at apogee, channel two (main) fires at 1000 feet. -JT -------------- next part -------------- An HTML attachment was scrubbed... URL: http://mx1.blastzone.com/pipermail/arts/attachments/20080611/937e4a8d/attachment.htm From jmwilkerson at hotmail.com Thu Jun 12 18:47:13 2008 From: jmwilkerson at hotmail.com (Jim Wilkerson) Date: Thu, 12 Jun 2008 18:47:13 -0700 Subject: [ARTS] ARTS default settings... In-Reply-To: <005801c8cbf1$aba78ae0$6400a8c0@HPPAVILION> References: <000601c8c904$a9fd48a0$6400a8c0@HPPAVILION><484BF4F6.4040107@lokiresearch.com><007901c8c989$0af94530$6400a8c0@HPPAVILION><484C5CAF.30800@lokiresearch.com> <00bc01c8c9bf$a170f450$6400a8c0@HPPAVILION> <005801c8cbf1$aba78ae0$6400a8c0@HPPAVILION> Message-ID: Interesting.... Plugged in my new ARTS 2 today and downloaded the settings from the altimeter. Profile 1 (DIP switch 1 ON) was set for main at 500 ft (apogee charge at apogee, hardwired). Profile 2 (DIP switch 1 OFF) was set for Apogee channel at apogee (no delay) and main at 1K feet. Both sample rates were set to 100 Hz. Regards Jim ________________________________ > From: news at rocketryplanet.com > To: news at rocketryplanet.com; arts at lokiresearch.com > Date: Wed, 11 Jun 2008 14:33:38 -0400 > Subject: Re: [ARTS] ARTS default settings... > > > I picked up a USB-to-Serial cable today and got the thing hooked up. I am having problems with the firmware update. > > > > The link http://lokiresearch.com/Programs/ARTS_FW_V1_61.ofw returns a 404 error. The firmware file in the zip file containing DataAnalyzer v1.61 returns a checksum of ?0xce1a?. > > > > What do I do? > > > > ________________________________ > > From: arts-bounces at lokiresearch.com [mailto:arts-bounces at lokiresearch.com] On Behalf Of Planet News > Sent: Sunday, June 08, 2008 7:30 PM > To: arts at lokiresearch.com > Subject: Re: [ARTS] ARTS default settings... > > > > I want to fly it next weekend and haven?t been able to locate a USB-to-Serial adapter yet in this backwater burg I live in. ;-) > > > > All of the eBay sellers want 7-14 days, I guess they want to send it pony express. Can anyone make any eBay recommendations? > > > > But I think you are correct about the 800 feet, as that?s what?s Data Analyzer 1.5 says in the default installation. > > > > > > ________________________________ > > From: Jeff Taylor [mailto:jeff at lokiresearch.com] > Sent: Sunday, June 08, 2008 6:27 PM > To: Planet News > Subject: Re: [ARTS] ARTS default settings... > > > > Honestly, I don't recall for sure what the defaults were on the older model. It might have been 800 feet. But what's the big deal? Just program it to whatever you want. > > -J > > Planet News wrote: > > And the ARTS1 is the same? > > > > ________________________________ > > From: Jeff Taylor [mailto:jeff at lokiresearch.com] > Sent: Sunday, June 08, 2008 11:04 AM > To: Planet News > Cc: arts at lokiresearch.com _________________________________________________________________ Now you can invite friends from Facebook and other groups to join you on Windows Live? Messenger. Add now. https://www.invite2messenger.net/im/?source=TXT_EML_WLH_AddNow_Now From ehall at ozarkaerospace.com Thu Jun 19 15:54:46 2008 From: ehall at ozarkaerospace.com (Erik Hall) Date: Thu, 19 Jun 2008 18:54:46 -0400 Subject: [ARTS] Shunting switch In-Reply-To: <484BF843.2030906@speakeasy.net> References: <484BF843.2030906@speakeasy.net> Message-ID: <001901c8d25f$78d17c60$6501a8c0@Ozark1> Bruce, The application of power to the ARTS2 main battery terminals also turns on a FET switch which connects the Pyro Battery source to the pyro switch circuits. Thus, without the main battery power there can be no current to the pyros. It was designed this way so that only one switch would be needed. That being said, there is still a high impedance path between the two leads of each pyro. Buildup of static electricity is still a possibility, so to be absolutely safe you should add a switch that shorts the two leads of each pyro together. (this is also why the e-matches are shipped to you with the two leads twisted together) Thanks, Erik > -----Original Message----- > From: arts-bounces at lokiresearch.com [mailto:arts-bounces at lokiresearch.com] > On Behalf Of Bruce E. Harris > Sent: Sunday, June 08, 2008 11:18 AM > To: ARTS > Subject: [ARTS] Shunting switch > > All, > > Following the TRA list regarding shunting switches, I would like to ask > an ARTS II specific question. > > Is a shunting switch with ARTS just another unnecessary point of > failure? Would only a power switch provide enought safty? > > Best Regards, > > Bruce > > -- > > Bruce E. Harris, MSgt, USAF, ret. > TRA #10564 L2 > MDRA member > "If it ain't broke, your not trying" Red Green > _______________________________________________ > ARTS mailing list > ARTS at lokiresearch.com > http://mx1.blastzone.com/mailman/listinfo/arts