Author Topic: Orbital's Cygnus debut mission to the ISS outlined  (Read 27913 times)

Offline Space Pete

Re: Orbital's Cygnus debut mission to the ISS outlined
« Reply #40 on: 11/16/2012 01:39 PM »
SpaceX uses a different configuration, so it is not issue for the next Dragon flight, he said, but Cygnus uses the same configuration as HTV and "we need to sort it out before Cygnus flies."

Hmm - not sure what they're saying here. Dragon, Cygnus, and HTV all use grapple fixtures (Dragon/HTV = FRGF, Cygnus = PDGF), which are grappled and released by the SSRMS in exactly the same way.

Maybe they mean a different configuration of abort software?
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Offline Space Pete

Re: Orbital's Cygnus debut mission to the ISS outlined
« Reply #41 on: 11/18/2012 01:06 PM »
Hmm - not sure what they're saying here. Dragon, Cygnus, and HTV all use grapple fixtures (Dragon/HTV = FRGF, Cygnus = PDGF), which are grappled and released by the SSRMS in exactly the same way.

Maybe they mean a different configuration of abort software?

And I have an answer to this - it's all to do with the position between the SSRMS LEE and the vehicle - for Dragon it is directly above, meaning the SSRMS does not need to back away, however for Cygnus & HTV it is at an angle, which means the SSRMS does need to back away and thus can cause friction, leading to potential drifting as seen with HTV-3.

From http://www.nasa.gov/pdf/707197main_Suffredini_ISS_NAC_20121114.pdf
« Last Edit: 11/18/2012 01:07 PM by Space Pete »
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Offline Salo

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Re: Orbital's Cygnus debut mission to the ISS outlined
« Reply #42 on: 03/27/2013 06:05 PM »
http://www.orbital.com/Antares-Cygnus/

Space Station Cargo Loaded in to Cargo Module at Wallops

March 2013

Orbital's Cygnus Cargo team recently loaded cargo into the COTS Demonstration Pressurized Cargo Module (PCM) in advance of the COTS Demonstration Flight. The cargo fr om NASA arrived at Wallops Flight Facility building H-100 by truck from Houston Texas on March 19th and was accepted by the Cygnus team that evening. The cargo was then unpacked, weighed, measured and inspected to ensure that the cargo successfully survived the trip. The cargo was then loaded into the Pressurized Cargo Module starting on March 22nd and completing on March 23rd. A total of 1235 lbs of cargo (560 kg) was loaded into the Cygnus. In addition, the Cygnus team configured the interior of the module for flight. The PCM is now ready to be mated to the Service Module when it arrives at H-100 on March26th.
An additional 376 lbs of cargo (171 kg) will be added to Cygnus once it is mated to the Antares rocket just prior to launch.

Offline Salo

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Re: Orbital's Cygnus debut mission to the ISS outlined
« Reply #43 on: 03/27/2013 06:07 PM »
http://www.orbital.com/Antares-Cygnus/

First Cygnus Service Module Shipped to Wallops

March 2013

On March 26th 2013, the Orbital Sciences Cygnus team shipped the Service Module (SM) for the COTS Demonstration mission from Orbital's Satellite Manufacturing Facility to Building H-100 at NASA's Wallops Flight Facility (WFF). The SM, encased in a protective shipping container, made the approximately 200 mile trip by truck to the H-100 facility high bay, wh ere the trailer was dropped off. The Cygnus integration and test team will carefully remove the SM from the shipping container, inspect the SM for any damage from the trip, and begin launch site processing. In early April, the SM will be mated to the Cygnus Pressurized Cargo Module (PCM), which was loaded with cargo and configured for flight on March 23rd. The complete Cygnus spacecraft will then be transferred from H-100 to building V-55 at WFF for hypergolic propellant loading. Once fueled, the Cygnus will be ready for integration on the Antares rocket.

Offline manboy

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Re: Orbital's Cygnus debut mission to the ISS outlined
« Reply #44 on: 04/14/2013 05:52 PM »
Can the solar arrays on a standard Cygnus be rotated?
« Last Edit: 04/14/2013 05:57 PM by manboy »
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Offline Salo

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Re: Orbital's Cygnus debut mission to the ISS outlined
« Reply #45 on: 04/14/2013 08:20 PM »
Cygnus Integration Begins at Wallops Flight Facility

April 2013

Orbital has unpacked the Cygnus Service Module (SM) (pictured in the foreground below) from its transfer trailer and has begun launch site integration testing following its journey from Orbital's Satellite Manufacturing Facility in Dulles VA. The Cygnus SM and its Pressurized Cargo Module (PCM)(background) are now both located in Building H-100 at the Wallops Flight Facility. Orbital is planning to mate the cargo-loaded PCM to the SM early in the week of April 1st.

http://www.orbital.com/Antares-Cygnus/

Offline Salo

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Re: Orbital's Cygnus debut mission to the ISS outlined
« Reply #46 on: 04/14/2013 08:21 PM »
COTS Demo Cygnus Spacecraft Mated at Wallops

April 2013

The COTS Demonstration Cygnus spacecraft completed a significant milestone on Tuesday, April 2, when its Pressurized Cargo Module (PCM) was attached to the Service Module (SM), and all mechanical flight connections were attached. The PCM was recently loaded with cargo, and was reoriented from the horizontal to the vertical to facilitate the attachment. The vertically oriented PCM was then lifted and precisely relocated over the SM by Orbital engineers and technicians.
After connecting electrical harnesses, the now completed Cygnus will perform a final set of tests to ensure proper functioning of the combined PCM/SM systems. After completion of the testing, the Cygnus will be prepared for transportation to the fueling facility.

http://www.orbital.com/Antares-Cygnus/

Offline russianhalo117

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Re: Orbital's Cygnus debut mission to the ISS outlined
« Reply #47 on: 04/14/2013 08:35 PM »
Can the solar arrays on a standard Cygnus be rotated?
AFAIK, at least in early design phase, the answer is No. Otherwise I have no clue except that I think starting on third flight ATK's Solar arrays intended for Orion SM are to be used. Exact information is somewhere on Orbitals website.

Offline Salo

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Re: Orbital's Cygnus debut mission to the ISS outlined
« Reply #48 on: 04/24/2013 09:07 AM »
Cygnus Spacecraft Fueled at Wallops Flight Facility

April 2013

– While all eyes have been on Antares in the recent weeks, our Cygnus spacecraft has achieved many significant firsts as it prepares for its maiden voyage to the International Space Station. After initial cargo installation at Wallops Flight Facility building H-100 and the first-time mating of the Cygnus Service and Cargo Modules, Cygnus completed its next milestone by completing its Launch-Site Integrated Systems Test and its transfer fr om the Wallops Main Base to the Wallops Fueling Facility, on Wallops Island, just north of the Antares launch site.

For the transfer, the Cygnus was loaded into the Cygnus Vertical Carrier (CVC). Because Cygnus was using the main road through the town of Atlantic, Virginia, the transfer was conducted at midnight, when road traffic would be minimal. Local residents did come out to watch Cygnus’ historic trip, which gave a festive air to a technical activity. Total travel time was a little less than 3 hours, with speeds averaging between five and seven miles per hour. Cygnus was delivered to the hypergolic fueling facility at building V-55, early on the morning of April 13th, where preparations immediately began for the fueling.

Because Cygnus uses hypergolic propellants, Orbital loads the fuel on one day, and then the oxidizer several days later. Since both fuel an oxidizer are poisonous, our Orbital personnel must wear special personal protective equipment while working with the propellants in the event of a leak in the facility. In the following pictures, Orbital personnel are “suited up” in SCAPE suits for the fuel loading. SCAPE stands for “Self-Contained Atmospheric Protective Ensemble,” and the suits look very much like an astronaut’s space suit. Fueling is monitored by engineering and safety personnel in building V-50, located nearby to V-55. Personnel in V-50 used a series of closed circuit TV cameras to monitor activities during the propellant loading process. Fuel loading occurred on April 15th, with oxidizer loading occurring on April 19th. Now fully fueled, Cygnus will be returned to the CVC for transfer from V-55 to the Horizontal Integration Facility, wh ere it will wait for integration onto the Antares for the COTS Demonstration mission to the space station.

http://www.orbital.com/Antares-Cygnus/

Offline jnc

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Re: Orbital's Cygnus debut mission to the ISS outlined
« Reply #49 on: 04/24/2013 12:09 PM »
our Cygnus spacecraft has achieved many significant firsts as it prepares for its maiden voyage to the International Space Station

I hope this flight won't see as many delays as the initial Antares one! (Yes, yes, I know a lot of them were down to the launch site, and not Orbital's fault, but still...) I can't wait to see them start launching these things on a very regular basis (and I guess they have some catching up to do, if they are to meet the contract).

Noel
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(old bumper sticker)

Online Lar

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Re: Orbital's Cygnus debut mission to the ISS outlined
« Reply #50 on: 04/24/2013 03:29 PM »
Having to do two transfers on that vertical carrier (through town, and late at night to impact traffic less) seems like it might be inefficient... no way to fuel in the HIF I guess?

How tall is it? Do they have to get a flag escort? Raise powerlines?
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Offline AnalogMan

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Re: Orbital's Cygnus debut mission to the ISS outlined
« Reply #51 on: 05/01/2013 06:40 PM »
The demo flight to the ISS has been delayed (it was until recently listed as NET June 15)

Date posted: 2013-05-01
Mission: COTS OSC Demo-1
Change: Launch date is 9/28/2013
Source: SCNS HSF Supervisor Melissa Blizzard 5/1/2013

http://msdb.gsfc.nasa.gov/change_log.php

Note that CRS/OSC-01 previously listed as NET September 12 is now showing as "TBD"

Offline Danderman

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Offline Salo

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Re: Orbital's Cygnus debut mission to the ISS outlined
« Reply #53 on: 05/04/2013 09:24 PM »
The demo flight to the ISS has been delayed (it was until recently listed as NET June 15)

Date posted: 2013-05-01
Mission: COTS OSC Demo-1
Change: Launch date is 9/28/2013
Source: SCNS HSF Supervisor Melissa Blizzard 5/1/2013

http://msdb.gsfc.nasa.gov/change_log.php

Note that CRS/OSC-01 previously listed as NET September 12 is now showing as "TBD"
Changes:
Quote
2013-05-01   COTS OSC Demo-1   Launch date is TBA.
http://msdb.gsfc.nasa.gov/change_log.php

Offline Jim

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Re: Orbital's Cygnus debut mission to the ISS outlined
« Reply #54 on: 05/04/2013 09:43 PM »
I wish people stop using MSDB as a source.  It is secondary at best and mostly tertiary.

Offline Space Pete

Re: Orbital's Cygnus debut mission to the ISS outlined
« Reply #55 on: 05/04/2013 09:49 PM »
I wish people stop using MSDB as a source.  It is secondary at best and mostly tertiary.

The delay to 28/9 was first confirmed on L2 prior to appearing on MSDB.
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Offline AnalogMan

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Re: Orbital's Cygnus debut mission to the ISS outlined
« Reply #56 on: 05/06/2013 04:25 PM »
Excerpt from Orbital Cygnus Update thread:


Antares Post-Flight Analysis Results - Flawless Launch Confirmed; Company Updates COTS Demonstration Mission Schedule
May 2013
[...]
With the Antares Test Flight successfully completed, Orbital's Antares and Cygnus teams are now focused on the Demonstration Mission to the International Space Station (ISS), the final milestone in the COTS joint program with NASA. Orbital currently expects to be ready to carry out the Demonstration Mission in August. Orbital is swapping out one first stage AJ26 main engine for another unit that is already fully tested in order to further inspect and confirm a seal is functioning properly. The company expects the engine change-out process to add about three to four weeks to the schedule. In addition, missions to the ISS must be carefully scheduled with NASA to fit into the pre-planned traffic pattern at the orbiting laboratory. A Japanese cargo ship, the HTV, is also scheduled for a mission to the ISS in August. If the HTV schedule slips, Orbital expects to be ready to go in August. If the HTV holds its schedule, Orbital's Demonstration Mission could be planned for September.
[...]
http://www.orbital.com/Antares-Cygnus/

Offline Lurker Steve

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Re: Orbital's Cygnus debut mission to the ISS outlined
« Reply #57 on: 05/06/2013 04:34 PM »
All of the AJ-26 engines have already been test fired at Stennis.

Is this potential seal problem something that they identified after some of the engines were already tested, kind of like that corrosion problem that didn't show up until after 3 engines were already tested ?

Online Chris Bergin

Re: Orbital's Cygnus debut mission to the ISS outlined
« Reply #58 on: 05/06/2013 04:34 PM »
I'll get an article written today and then we'll create the set of new threads for this.

Offline manboy

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Re: Orbital's Cygnus debut mission to the ISS outlined
« Reply #59 on: 05/06/2013 05:55 PM »
"The company expects the engine change-out process to add about three to four weeks to the schedule."

It only delayed the SpaceX COTS 2 flight by three days.
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