SpaceX has successfully tested an upgraded version of its Merlin rocket engine.
SpaceX has successfully tested an upgraded version of its Merlin rocket engine. Video at the link.
On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.
The ebook is available everywhere for $5.99 (before discount) at amazon, or direct from my ebook publisher, ebookit. If you buy it from ebookit you don't support the big tech companies and the author gets a bigger cut much sooner.
The audiobook is also available at all these vendors, and is also free with a 30-day trial membership to Audible.
"Not simply about one mission, [Genesis] is also the history of America's quest for the moon... Zimmerman has done a masterful job of tying disparate events together into a solid account of one of America's greatest human triumphs."--San Antonio Express-News
SpaceX has successfully tested an upgraded version of its Merlin rocket engine. Video at the link.
On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.
The ebook is available everywhere for $5.99 (before discount) at amazon, or direct from my ebook publisher, ebookit. If you buy it from ebookit you don't support the big tech companies and the author gets a bigger cut much sooner.
The audiobook is also available at all these vendors, and is also free with a 30-day trial membership to Audible.
"Not simply about one mission, [Genesis] is also the history of America's quest for the moon... Zimmerman has done a masterful job of tying disparate events together into a solid account of one of America's greatest human triumphs."--San Antonio Express-News
that is about 140,000 lbs of thrust from One engine. a cluster of 5 or 7 is capable of taking us to Mars .
A cluster of nine of these engines (as will presumably be used on the Falcon 9) would have a total first stage thrust of 1,260,000 lbs.
– This is about 84% of the first stage thrust of the Saturn IB that took the Apollo Command and Service Module to LEO.
– This is about 17% of the first stage thrust of the Saturn V that supported the lunar landings
Hopefully a cluster of nine will allow the Falcon 9 to deliver a fully loaded Dragon cargo vehicle to the ISS.
A ” cluster of 5 or 7” of them will not be taking anyone to Mars.
Wade overspoke, but I want to point out that medium lift sized rockets, like the Falcon 9 family, can support lunar and Mars missions in an architecture tailored to their payload performance and their particular advantages.
Clusters of these engines can put men on mars, or the moon.