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#400 by antonioe on 31 Oct, 2007 03:16
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Quote
simonbp - 30/10/2007 11:00 PM
Quoteantonioe - 28/10/2007 7:38 AM Yes, but it's {the second stage} being developed by somebody else, so I can't talk about it until the other party agrees we can do so...
For reference, is it in the similar total impulse range as a 48B, or larger?Patience, young Jedi, patience must you have...
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#401 by vt_hokie on 01 Nov, 2007 15:50
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I didn't realize just how small the Orbcomm sats are! Can you say what the approximate lifespan is on those spacecraft?
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#402 by Skyrocket on 01 Nov, 2007 16:40
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vt_hokie - 1/11/2007 6:50 PM
Design life was 4 years.
I didn't realize just how small the Orbcomm sats are! Can you say what the approximate lifespan is on those spacecraft?
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#403 by Skyrocket on 05 Dec, 2007 16:15
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The new Orbital Quarterly Newsletter shows an illustration of the Taurus II:
http://www.orbital.com/NewsInfo/Publications/OrbitalQuarterly_Fall07.pdf
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#404 by vt_hokie on 05 Dec, 2007 16:31
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That's pretty cool that it's made available online! Thanks for the link!
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#405 by meiza on 05 Dec, 2007 18:16
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4 engines?
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#406 by antonioe on 05 Dec, 2007 20:41
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Two
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#407 by Jamie Young on 05 Dec, 2007 20:45
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Skyrocket - 5/12/2007 11:15 AM
The new Orbital Quarterly Newsletter shows an illustration of the Taurus II:
http://www.orbital.com/NewsInfo/Publications/OrbitalQuarterly_Fall07.pdf
Link doesn't work now. -
#408 by Squid.erau on 05 Dec, 2007 21:06
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Slightly off-topic, but on page 3 of the PDF linked above is a picture of the decommissioned Navy Mk 70 booster. It's the wider aft portion of the coyote SSST. This is the motor they are talking about using 4 of for the abort test flights of the new MLAS system for Orion.
Matt -
#409 by edkyle99 on 05 Dec, 2007 22:08
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Constant diameter profile. Looks to be about 25-30 meters to top of upper stage unit. Upper stage only looks like it is 4-7 meters tall, which is puzzling. Assuming that this upper stage consists of an outer shell equipped with a low-thrust N204/MMH bipropellant propulsion system to serve as a trim stage with a jettisonable solid motor "second stage" mounted within, I'm guessing that the solid motor has to be shorter than a standard Castor 120 (which was given as 2.37 x 10.7 meters for Athena), unless this drawing doesn't show the true interior length of the first stage. The drawing could be hiding a big interstage area above the first stage propellant tanks.
Still, since a Castor 120 would be too big and an Orion 50SXL type slightly too small, I'm guessing that the second stage motor must look something like a scaled Castor 120 ("Castor 60"?). This would give a 200 tonne first stage, a 25-35 tonne second stage motor, and a small trim stage that probably weighs no more than 1-2 tonnes.
I could be wrong. I probably am wrong. I've been wrong before. Still fun to ponder.
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#410 by antonioe on 06 Dec, 2007 04:33
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Good detective work... keep going, keep going...
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#411 by CFE on 06 Dec, 2007 04:57
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I would guess that it's a custom-designed second stage. I would even guess that ATK was the manufacturer (after all, who else is left to tackle a solid rocket this big?)
As a wild guess, ATK may even be using a single segment from the shuttle's SRB as the basis for the Taurus-II (still hoping to make "Cygnus" official) second stage. -
#412 by Jim on 06 Dec, 2007 11:28
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Quote
Jamie Young - 5/12/2007 4:45 PM
QuoteSkyrocket - 5/12/2007 11:15 AM
The new Orbital Quarterly Newsletter shows an illustration of the Taurus II:
http://www.orbital.com/NewsInfo/Publications/OrbitalQuarterly_Fall07.pdf
Link doesn't work now.
Same for me, even when truncated to http://www.orbital.com -
#413 by Skyrocket on 06 Dec, 2007 13:14
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For those, who have problems in opening the newsletter, here is a screenshot of the Taurus II
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#414 by Big Al on 06 Dec, 2007 13:37
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From the Dec 3rd issue of Avation Week, Israel is looking to develop an air launch system for small satellites, maybe you could market your whole system world wide, I bet it would be more profitable than just launching rockets.
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#415 by antonioe on 06 Dec, 2007 14:13
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"whole system"? Could you elaborate?
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#416 by Big Al on 06 Dec, 2007 15:02
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Sell them the rocket design, aircraft and system technology. Let the customer build and launch his own (military) satellites
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#417 by Jim on 06 Dec, 2007 15:04
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Big Al - 6/12/2007 11:02 AM
Sell them the rocket design, aircraft and system technology. Let the customer build and launch his own (military) satellites
Not possible. Against many anti proliferation treaties. -
#418 by Jim on 06 Dec, 2007 15:07
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Big Al - 6/12/2007 9:37 AM
From the Dec 3rd issue of Avation Week, Israel is looking to develop an air launch system for small satellites, maybe you could market your whole system world wide, I bet it would be more profitable than just launching rockets.
Actually, no. there is always a need to launch satellites. There is little need to sell the means to do it -
#419 by A_M_Swallow on 06 Dec, 2007 15:19
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Skyrocket - 6/12/2007 2:14 PM
For those, who have problems in opening the newsletter, here is a screenshot of the Taurus II
The grey pipes on the side of the nozzles made it look like there was a second set behind.