January 2012 - AMSAT-BB - mailman.amsat.org

Multifunction Portable Tracker / USB Rotor Controller
by Thomas Doyle 17 Jan '12

17 Jan '12

You might find this interesting. http://www.tomdoyle.org/SimpleSatTracker Sent from my computer. 73 W9KE tom ...

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Re: Model Rocket Booster Engine for Picosatellite ([email protected])
by Burns Fisher 17 Jan '12

17 Jan '12

Pretty cool idea! Of course Aerotech sells much larger engines with hundreds of newton-seconds of total impulse, and somewhere close to 100 pounds of instantaneous thrust when it is first lit! And even if it stays in LEO, this certainly prolongs its life... What I wonder about is how the 3-axis stabilization on this bird works...I don't see any additional nozzles in the picture and if they use a momentum wheel, they have to unload it at some point. I suppose you could spin it instead of active stabilization, but then you can only use one engine (on the spin axis). As someone commented earlier in another thread, you need two firings to go from one circular orbit to another one at a different altitude. Thanks for posting! Burns > Thanks Joe. > > What an exciting concept. > > Having got really enthusiastic, I thought I would roughly calculate how > high one of these little rockets could raise the orbit. > > Given that one rocket reload pack has > > 40 Newtons of thrust > and lasts for about one second > We have 40 Newton seconds of specific impulse. > > > The mass flow rate is 18.6g in one second or 0.0168kg/s > > So.....the ISP (a bit vague here) is around 219 seconds (ave thrust / mass > flow rate / 9.81ms^2) > > Which should get a 3.7kg satellite's apogee about..... 40km higher. > > So...Not enough for P3E then > > Oh well, not so exciting after all. Time for a beer. > > 73 David G0MRF > > > > > In a message dated 17/01/2012 03:56:37 GMT Standard Time, > rhyolite(a)nettally.com writes: > > Has anyone seen this. I am surprised a shuttle mission permitted this > type of booster. From what I believed, safety concerns prevented most > types of boosters. > > http://www.rocketryplanet.com/content/view/3706/30/#axzz1jgQ85qx1 > > -- > Joe Leikhim > > Leikhim and Associates > Communications Consultants > Oviedo, Florida > > www.Leikhim.com <http://www.leikhim.com/> > > JLeikhim(a)Leikhim.com > > 407-982-0446 > > Note to GMail Account users. Due to an abnormally high volume of spam > originating from bogus GMail accounts, I have found it necessary to block > certain GMail traffic. Please phone me if you believe your message was not > received. > > _______________________________________________ > Sent via AMSAT-BB(a)amsat.org. Opinions expressed are those of the author. > Not an AMSAT-NA member? Join now to support the amateur satellite > program! > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb > > > > ------------------------------ > > _______________________________________________ > Sent via amsat-bb(a)amsat.org. Opinions expressed are those of the author. > Not an AMSAT member? Join now to support the amateur satellite program! > http://amsat.org/mailman/listinfo/amsat-bb > > > End of AMSAT-BB Digest, Vol 7, Issue 30 > *************************************** >

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SpaceX WF9XJL STA application
by Tarsala, Jan A (337C) 17 Jan '12

17 Jan '12

https://apps.fcc.gov/oetcf/els/reports/STA_Print.cfm?mode=current&applicati… 73, Jan WB6VRN MSL Telecom NASA Jet Propulsion Laboratory

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G3RUH PCB for FO-12 modem and 9600 baud modem
by Jack Colson 17 Jan '12

17 Jan '12

Is there any interest in either of these boards? I have one each available, working the last time I used them. Contact: W3TMZ

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IC910 Main/Sub
by Tom Lubbers K8TL 17 Jan '12

17 Jan '12

Pedro, For 9600B I connect PTT and TX data to the sub jack and receive audio to the Main Jack. This has worked fine for many satellites and several different TNC's. For 1200b I use the aux jack. This works fine for both satellite and simplex. Bom Gia and 73 Tom K8TL

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Model Rocket Booster Engine for Picosatellite
by Joe Leikhim 17 Jan '12

17 Jan '12

Has anyone seen this. I am surprised a shuttle mission permitted this type of booster. From what I believed, safety concerns prevented most types of boosters. http://www.rocketryplanet.com/content/view/3706/30/#axzz1jgQ85qx1 -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com JLeikhim(a)Leikhim.com 407-982-0446 Note to GMail Account users. Due to an abnormally high volume of spam originating from bogus GMail accounts, I have found it necessary to block certain GMail traffic. Please phone me if you believe your message was not received.

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Re: HNI4/AJ5C follow up
by k6yk 17 Jan '12

17 Jan '12

HI Bob, Well, if we can get the locals on the east coast to be quiet for a minute we could have made it. I heard you a couple of times on the 19:10 pass today, and gave a couple of calls. But the locals were covering everything up. I had a 4 degree elevation pass on that one. 73, John, K6YK On Mon, 16 Jan 2012 16:43:15 -0400 Bob Herrell <bob72601(a)gmail.com> writes: > Good contacts for today, Jan 16, 2012 on AO-27 1907z pass: K0BAM, > N8RO, > WA4NVM, and AC0RA. de Bob HI4/AJ5C > _______________________________________________ > Sent via AMSAT-BB(a)amsat.org. Opinions expressed are those of the > author. > Not an AMSAT-NA member? Join now to support the amateur satellite > program! > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb > ____________________________________________________________ 53 Year Old Mom Looks 33 The Stunning Results of Her Wrinkle Trick Has Botox Doctors Worried http://thirdpartyoffers.juno.com/TGL3141/4f14dd5cb114430195fst02vuc

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