Ah yes and how many knew Martin Sweeting was involved in early design meetings for P3A? Sorry for leaving you out Sir Martin!
On Sun, Sep 29, 2013 at 11:14 AM, Robert McGwier <[email protected]>wrote: > From one of the great minds of our history. Marty showed us how good the > kinds of writing he did would be for us...... > > The first photo is one of the first formal meetings where Karl, Jan, > Marty Davidoff, Tom Clark and others discuss Phase 3A. These were GLORIOUS > years for AMSAT. No one denies this and no amount of back biting or rehash > of old incidents will fix it. The tools they had were their brains, a > pencil, and SOME calculation engine. The tools we have today allow many > more to play. The achievements that Karl's GENIUS, Jan's system > engineering and the technical input and guidance from the rest gave > (including Marty) are unsung and poorly told songs of the indomitable > spirit of these free spirited thinkers... > > > http://n4hy.smugmug.com/AMSAT/Phase-3-A/001-Meetings-01-Technical/2053450_WkWbc9#!i=105550031&k=L7jf7FJ > > And this one even earlier (that's Rich Zwirko, K1HTV in coat and tie). > If others can identify people (not including Tom, Marty, Karl, and Jan and > Rich) please let me know who they are. > > > http://n4hy.smugmug.com/AMSAT/Phase-3-A/001-Meetings-01-Technical/2053450_WkWbc9#!i=105550132&k=PqJ99cK > > I almost could wish I was 15 years older or had a time machine..... > > Bob > N4HY > > > > On Mon, Sep 23, 2013 at 6:35 PM, Paul Stoetzer <[email protected]> wrote: > >> I recently obtained a copy of the 1990 edition of Martin Davidoff's >> Satellite Experimenters' Handbook and as I was browsing through the book, >> I >> came across a passage on page 4-9 about the difficulties with UO-11, >> that's >> very relevant to the ongoing debate about the lack of Phase 3 satellites: >> >> "If there's a message here, it's that taking part in the amateur satellite >> program is not for the faint-hearted. Setbacks and barriers will always be >> part of the picture. And, the most rewarding successes will probably come >> from employing ingenuity and tenacity to overcome the 'impossible' >> hurdles." >> >> 73, >> >> Paul Stoetzer, N8HM >> Washington, DC (FM18lv) >> >> >> On Sun, Sep 22, 2013 at 7:17 PM, <[email protected]> wrote: >> >> > >> > >> > Hi Dan, >> > >> > OSCAR-10 (P3-B) used the same 400N engine as OSCAR-13 (P3-C) and >> > OSCAR-40 (P3-D). >> > For P3-E we have a 200N motor from EADS Astrium, the same one which is >> > used on the European ATV... >> > >> > I was AMSAT P3-A (planned to be OSCAR-9) which used a solid propellant >> > apogee kick-motor. >> > It's under the water near the cost of french Guiana.. RIP >> > >> > You can find an very good article here: >> > http://www.ka9q.net/AMSAT-Tech-Journal-2.pdf >> > See page 8..15 >> > >> > Rest assured, the PFA and propulsion system was qualified according to >> > highest commercial standards by commercial companies. Thus in no way >> > there would be any risk to the launcher or other payloads. This also >> > includes several levels of safety borders in the hardware design and in >> > the software. The launch agencies have there own specialized personal >> > to review all the details... Without that, nobody would have >> launched >> > any of the P3 satellites !!! >> > What happened to AO-40 later on after orbit injection and after >> > activating the systems is a completely different matter and did not >> > present any risk to the launcher at any time! >> > >> > >> > >> > Michael R. Lengruesser, DD5ER >> > >> > AMSAT-DL e.V. >> > -- International Satellites for Communication, >> > Science and Education -- >> > [email protected] >> > http://www.amsat-dl.org >> > >> > >> > >> > In einer eMail vom 22.09.2013 21:07:08 Westeuropäische Sommerzeit >> schreibt >> > [email protected]: >> > >> > >>The apogee motors for OSCAR-10,and OSCAR-13 were solid propellant >> > >>400 Newton trust motors donated to AMSAT-DL by the Messerschmitt >> > Aerospace >> > >>Company in Germany. >> > >> > Only Phase 3A had a solid fuel motor. AO-10 and AO-13 had liquid fuel >> > bi-propellent motors the same as AO-40. No matter how well designed >> they >> > are, >> > they still have the potential to blow up the entire launch stack if >> > something >> > goes wrong. Since Dick Daniels is no longer with us, the knowledge has >> > been >> > lost and we will not be launching any more of these in the future. >> > >> > Dan Schultz N8FGV >> > >> > >> > _______________________________________________ >> > Sent via [email protected]. 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 [email protected]. 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 [email protected]. 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 >> > > > > -- > Bob McGwier > Owner and Technical Director, Allied Communication, LLC > Professor Virginia Tech > Senior Member IEEE, Facebook: N4HYBob, ARS: N4HY > Faculty Advisor Virginia Tech Amateur Radio Assn. (K4KDJ) > -- Bob McGwier Owner and Technical Director, Allied Communication, LLC Professor Virginia Tech Senior Member IEEE, Facebook: N4HYBob, ARS: N4HY Faculty Advisor Virginia Tech Amateur Radio Assn. (K4KDJ) _______________________________________________ Sent via [email protected]. 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
