Author Topic: LIVE: Orbital ATK Minotaur 4 - ORS-5 - August 25 2017, SLC-46  (Read 38313 times)

Offline russianhalo117

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Congratulations to all concerned. Especially worth seeing for its sprightly launch off the pad.
Yep.  An 87 tonne rocket lifting off on 209 tonnes of sea level thrust from its SR-118 first stage motor.  T/W = 2.4, about two times larger than for Falcon 9, Atlas 5, and the like.

 - Ed Kyle

If it was an ICBM would it launch even quicker than this, I know some Russian ICBMs used systems to push them out of their silos before they ignited their motors.
The GFE motors is from LGM-118A Peacekeeper ICBM Which was USAF's only cold start canister launched ICBM. LGM-118A used Cold start from only Minuteman Silos and mobile launchers. Because the missile never reached Full Operational Capability a Hot Start version was never employed beyond a few development tests. Because of this Cold Start capability Minotaur versions with its launch canister installed could also be launched from silos across the US like Dnepr does in the  Former Soviet Republics as well as continue to launch in Hot Start mode like other Russian Conversional launchers.
« Last Edit: 08/26/2017 08:48 PM by russianhalo117 »

Offline catdlr

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Geo Surveillance - Air Force 08-26-2017


USLaunchReport
Published on Aug 26, 2017


Air Force Space Command launched an all Air Force mission satellite with a telescope that checks our geostationary satellites from space. An incredibly fast moving solid fuel five stage rocket repurposed ICBM.

https://www.youtube.com/watch?v=snvTuy-SLeI?t=001



Tony De La Rosa

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Ben Cooper has posted a couple of shots on twitter:

Quote
This morning's first ever Minotaur from Cape Canaveral lights up the Florida coastline! (Orbital ATK).
https://twitter.com/launchphoto/status/901363076716310528

Quote
Fire and fury: Moment of ignition for a Minotaur IV rocket, first from Cape, at 2:04am EDT this morning (Orbital ATK).
https://twitter.com/launchphoto/status/901600226561200128

Offline vapour_nudge

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Ben Cooper has posted a couple of shots on twitter:

Quote
This morning's first ever Minotaur from Cape Canaveral lights up the Florida coastline! (Orbital ATK).
https://twitter.com/launchphoto/status/901363076716310528

Quote
Fire and fury: Moment of ignition for a Minotaur IV rocket, first from Cape, at 2:04am EDT this morning (Orbital ATK).
https://twitter.com/launchphoto/status/901600226561200128

Great photos. I know exactly where I'd place the marshmallows

Offline russianhalo117

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Ben Cooper has posted a couple of shots on twitter:

Quote
This morning's first ever Minotaur from Cape Canaveral lights up the Florida coastline! (Orbital ATK).
https://twitter.com/launchphoto/status/901363076716310528

Quote
Fire and fury: Moment of ignition for a Minotaur IV rocket, first from Cape, at 2:04am EDT this morning (Orbital ATK).
https://twitter.com/launchphoto/status/901600226561200128

Great photos. I know exactly where I'd place the marshmallows
They would be toxic if they survived,

Offline ZachS09

That second photo was utterly spectacular.

No other camera could've captured that shot.
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

Online Steven Pietrobon

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Congratulations to Orbital ATK and USAF for the successful launch!
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online FutureSpaceTourist

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Quote
Official photos from Saturday's #MinotaurIV #ORS5 launch @45thSpaceWing @usairforce Credit: Ben Cooper

https://twitter.com/orbitalatk/status/901862637859999745

Offline edkyle99

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That second photo was utterly spectacular.

No other camera could've captured that shot.
And no other photographer, I suspect.

Ben Cooper is superb.  He sees the light before it arrives.

 - Ed Kyle
« Last Edit: 08/28/2017 03:11 PM by edkyle99 »

Offline gwiz

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The expected sixth object is now catalogued, 2017-050F/42926.

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more pics

Offline edkyle99

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It just occurred to me that every deployed U.S. ICBM flew first from Cape Canaveral (or "Cape Kennedy") with the exception of MX/Peacekeeper.  Now, in a way, one has finally flown. 

I wonder how many more MX-class Minotaur launches are even possible?  There were 50 missiles deployed and retired.  There were 51 MX test flights.  There were almost certainly some spare motor sets remaining at program's end.  (I recall reading that 114 MX/PK missiles were produced altogether.)  There have been seven Minotaur 4/5 flights and three "DARPA Taurus" launches that apparently used MX first stages.  The resource is obviously limited, but time may be a bigger factor than numbers of motors.

 - Ed Kyle
« Last Edit: 08/29/2017 03:39 PM by edkyle99 »

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Quote
Minotaur IV ORS-5 Launch Broadcast
Orbital ATK

Published on 29 Aug 2017
On August 26, 2017 Orbital ATK's Minotaur IV successfully launched the ORS-5 satellite for the United States Air Force from Cape Canaveral Air Force Station. This video features a full replay of the broadcast and launch. Get more information on the mission here: bit.ly/2x7o20P

Offline gwiz

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The Minotaur fourth stage decayed yesterday.  Such a rapid decay suggests that it deployed a large drag sail.

Offline edkyle99

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The Minotaur fourth stage decayed yesterday.  Such a rapid decay suggests that it deployed a large drag sail.
The fourth stage solid motor is integrated with avionics into a Guidance and Control Assembly (GCA).  The GCA has an attitude control system to position the stage during coast periods and to provide roll control during burns.  I wonder if the GCA ACS might have been was used to lower the orbit a bit.

 - Ed Kyle
« Last Edit: 09/04/2017 04:03 PM by edkyle99 »

Offline russianhalo117

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The Minotaur fourth stage decayed yesterday.  Such a rapid decay suggests that it deployed a large drag sail.
The fourth stage solid motor is integrated with avionics into a Guidance and Control Assembly (GCA).  The GCA has an attitude control system to position the stage during coast periods and to provide roll control during burns.  I wonder if the GCA ACS might have been was used to lower the orbit a bit.

 - Ed Kyle
I recall it being stated that the GCA ACS was depleted after 4/5 sep and passitivised

Offline zubenelgenubi

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An interesting challenge for amateur satellite observers (there apparently are none properly situated for this task).

Ted Molczan replies in RE: Good Target To Look For - New US DoD Satellite, SensorSat:
Quote
An object in a 600 km high equatorial orbit would reach the horizon of
observers within about 23.9 deg of the equator. It would reach 10 deg
elevation for observers within about 15.8 deg of the equator.

Apparently, he knows of no one of sufficient skill (and who corresponds with the amateur satellite observing community) that observes on or within a few degrees latitude of the Equator.
« Last Edit: 09/19/2017 03:22 PM by zubenelgenubi »
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Offline zubenelgenubi

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No USA designation for ORS-5 or the cubesats?
« Last Edit: 09/04/2017 10:17 PM by zubenelgenubi »
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Offline Skyrocket

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This launch was originally also to carry 8 Lemur-2 cubesats for Spire, but this was cancelled due to the restriction on the use of excess ballistic missile assets for launch vehicles to U.S. government-sponsored payloads.

http://spacenews.com/minotaur-4s-canceled-commercial-cubesat-rideshares-could-spark-policy-changes/

Offline ZachS09

This launch was originally also to carry 8 Lemur-2 cubesats for Spire, but this was cancelled due to the restriction on the use of excess ballistic missile assets for launch vehicles to U.S. government-sponsored payloads.

http://spacenews.com/minotaur-4s-canceled-commercial-cubesat-rideshares-could-spark-policy-changes/

Were those Lemur cubesats the ones that launched last July with the Kanopus-V-IK 1 satellite?
"Liftoff of Falcon 9: the world's first reflight of an orbital-class rocket."

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