SpaceX conducts successful static fire test of the Falcon 9 first stage rocket at 4:30 p.m. EDT on Aug. 31, 2017 on Launch Complex 39A on NASA's Kennedy Space Center, Fl., as seen from nearby Playalinda causeway. Liftoff of the USAF X-37B OTV-5 mini-shuttle mission is scheduled for Sept. 7, 2017. Credit: Ken Kremer/kenkremer.com
PLAYALINDA BEACH/KENNEDY SPACE CENTER, FL – Following a successful engine test firing of the Falcon 9 first stage late Thursday afternoon (Aug. 30), SpaceX is targeting a post Labor Day launch of the U.S. Air Force's unmanned X-37B mini-shuttle - a technology testing spaceplane.
The brief but critical hold down engine test took place at 4:30 p.m. EDT (2030 GMT) Aug. 31 at Launch Complex 39A on NASA's Kennedy Space Center - as witnessed live by myself and a few spectators from nearby Playalinda Beach Causeway. See my photos herein.
Both SpaceX and the Air Force announced the target launch date after completion of the Aug. 31 engine test.
"Static fire test complete," SpaceX confirmed via Twitter soon after completion of the test, "—targeting Falcon 9 launch of OTV-5 from Pad 39A at @NASAKennedy on Thursday, September 7."
The routinely done static fire test and involves conducting a full launch dress rehearsal and countdown culminating with igniting all nine Merlin 1D first stage engines during a hold down test at the pad.
SpaceX conducts successful static fire test of the Falcon 9 first stage rocket at 4:30 p.m. EDT on Aug. 31, 2017 on Launch Complex 39A on NASA's Kennedy Space Center, Fl., as seen from nearby Playalinda causeway. Liftoff of the USAF X-37B OTV-5 mini-shuttle mission is scheduled for Sept. 7, 2017. Credit: Ken Kremer/kenkremer.com
The exact launch time had been a closely guarded secret – until this evening.
The X-37B launch is apparently lunchtime Thursday, September 7 at 12 PM - 12:01 PM, according to a Facebook post by the U.S. Air Force Space Command and the 45th Space Wing at Patrick Air Force Base, Fla., posted Friday evening.
"The Air Force Rapid Capabilities Office is undergoing final launch preparations for the fifth mission of the X-37B Orbital Test Vehicle [OTV]," the Secretary of the Air Force Public Affairs announced. "The OTV is scheduled to launch on Sept. 7, 2017, onboard a SpaceX Falcon 9 launch vehicle.
The X-37B will be launched for the fifth time on the OTV-5 mission atop a SpaceX Falcon 9 on Sept. 7 from Launch Complex 39A on the Kennedy Space Center.
The Boeing-nuilt X-37B is process for flight at KSC using refurbished NASA space shuttle processing facilities now dedicated to the mini-shuttle.
But in another first, the OTV-5 mission marks the first launch of an X-37B spaceplane by SpaceX.
All four prior OTV missions launched on the United Launch Alliance Atlas V.
"The many firsts on this mission make the upcoming OTV launch a milestone for the program," said Randy Walden, the director of the Air Force Rapid Capabilities Office.
"It is our goal to continue advancing the X-37B OTV so it can more fully support the growing space community."
The OTV-4 mission launched on the ULA Atlas V on May 20, 2015 from Space Launch Complex-41, on Cape Canaveral Air Force Station.
Blastoff of the X-37B spaceplane on United Launch Alliance (ULA) Atlas V rocket with the OTV-4 AFSPC-5 satellite for the U.S. Air Force at 11:05 a.m. EDT, May 20, 2015 from Space Launch Complex-41. Credit: Ken Kremer/kenkremer.com
After spending a record setting 718 days in orbit, the X-37B program completed its fourth mission by landing back at KSC's Shuttle Landing Facility on May 7, 2017. Overall OTV's have spent a total of 2,085 days in orbit.
Playalinda Beach is located just 4 miles north of pad 39A and offers an excellent launch viewing location for the OTV-5 mission – if officials allow it to be open to the public.
The engine test comes at the end of a very busy August with a trio of Florida Space Coast launches plus a Total Solar 'Eclipse Across America' sandwiched in between.
Also noteworthy is that OTV-5 will be launched into a higher inclination orbit compared to the prior four, serve as a technology testbed for research payloads and will also deploy several cubesats.
"The fifth OTV mission continues to advance the X-37B's performance and flexibility as a space technology demonstrator and host platform for experimental payloads," the USAF said in a statement.
"This mission carries small satellite ride shares and will demonstrate greater opportunities for rapid space access and on-orbit testing of emerging space technologies. Building upon the fourth mission and previous collaboration with experiment partners, this mission will host the Air Force Research Laboratory Advanced Structurally Embedded Thermal Spreader payload to test experimental electronics and oscillating heat pipe technologies in the long duration space environment."
SpaceX will also attempt another land landing of the 156-foot-tall Falcon 9 first stage back at Landing Zone-1 (LZ-1) at the Cape.
"The fifth OTV mission will also be launched into, and landed from, a higher inclination orbit than prior missions to further expand the X-37B's orbital envelope."
Watch for Ken's continuing onsite zzx-37B OTV-5 and NASA mission reports direct from the Kennedy Space Center and Cape Canaveral Air Force Station, Florida.
Stay tuned here for Ken's continuing Earth and Planetary science and human spaceflight news.
Ken Kremer
The X-37B Orbital Test Vehicle taxiing on the flightline on March 30th, 2010, at the Astrotech facility in Titusville, Florida. Credit: USAF
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