Free Newsletters - Space News - Defense Alert - Environment Report - Energy Monitor
by Morris Jones
Sydney, Australia (SPX) Aug 03, 2014
Later this year, China will send a spacecraft out to the Moon, then return it to Earth. The uncrewed vehicle will fly around the far side of the Moon and use the Moon's gravity to slingshot it back to Earth. As it approaches the home planet, the spacecraft will release a capsule that will parachute to a soft landing.
Officially, the mission is designed to test a re-entry capsule to be used in a future robotic lunar-sample return mission. In this analyst's opinion, the mission is also designed to prepare for a future Chinese astronaut launch to the Moon. Filling this information vacuum, I have now prepared a rough diagram of the expected layout of China's first circumlunar spacecraft.
China has slowly trickled out details on this mission, but has yet to release any illustrations of the entire vehicle.
China has disclosed that the main module of the spacecraft is based on the same design as the Chang'e-1 and 2 lunar orbiters. This is a boxy structure that is itself derived from a Chinese communications satellite design. Using this basic structure again makes sense. It has a proven track record on two previous lunar missions.
China has also released photographs of the re-entry capsule. It's a small scale-model of the Shenzhou re-entry module used to launch and return China's astronauts.
There are some solid technical reasons for using this type of design, but the decision to make such a precise copy of the Shenzhou capsule was suspicious. It represents another piece of evidence for the case that China eventually plans to launch a full-scale Shenzhou capsule on a similar mission.
This analyst has found no precise reports of the size of this small capsule, but has formed a rough estimate by examining photographs and comparing the capsule to people standing around it.
Using this rough form of mensuration, this analyst suggests that the capsule has a base diameter of 1.5 metres. This number also has a nice, clean feel from an engineering perspective. It may not be exact, but it's fairly close.
We know the dimensions of the Chang'e spacecraft module exactly, thanks to official Chinese reportage. It's a rectangular prism with sides of 2.2 metres, 2 metres and 1.7 metres. The spacecraft's main engine protrudes from one of the larger rectangular faces of the module.
With this in mind, it makes sense to assume that the capsule would be placed on the rectangular face exactly opposite the engine. This balances the centre of mass of the whole spacecraft from a thrust perspective.
When a 1.5 metre capsule is sketched in this position, it produces a design that looks fairly balanced. This is the basis of the illustration supplied with this article. The capsule must be slightly raised from the module to avoid contact with its fuel tank and other parts.
Is this the real thing? We won't know until China releases more information.
Dr Morris Jones is an Australian space analyst who has written for spacedaily.com since 1999. Email morrisjonesNOSPAMhotmail.com. Replace NOSPAM with @ to send email. Dr Jones will answer media inquiries.
China National Space Administration
The Chinese Space Program - News, Policy and Technology
China News from SinoDaily.com
|The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement All images and articles appearing on Space Media Network have been edited or digitally altered in some way. Any requests to remove copyright material will be acted upon in a timely and appropriate manner. Any attempt to extort money from Space Media Network will be ignored and reported to Australian Law Enforcement Agencies as a potential case of financial fraud involving the use of a telephonic carriage device or postal service.|