Reminder “Barbeque Roll of a Near Axisymmetric Spacecraft” – Virtual Presentation 10/29

SAWE members you have seen the email invitation to the SAWE-Hampton Roads (10/29 12:00PM Eastern U.S ) virtual chapter meeting. This is just a reminder that the presentation, the first half of the meeting, is open to all members. But the Zoom link is sent privately as only 100 slots are available and we are avoiding the phenomena of “zoom bombing”.

Contact if you would like to attend and still need the meeting invitation/link.

Note that for anyone who is unable to download the ZOOM application. You can click on the meeting link, then select “Launch Meeting”, and then select “Join from your browser”.

Carlos M. Roithmayr is a senior aerospace engineer in the Systems Analysis and Concepts Directorate at the NASA Langley Research Center in Hampton, Virginia. He earned a Bachelor of Aerospace Engineering degree at the Georgia Institute of Technology, both an M.S. and a Degree of Engineer in Aeronautics and Astronautics from Stanford University, and a Ph.D. in Aerospace Engineering from the Georgia Institute of Technology. He began his career with NASA at the Johnson Space Center in Houston, Texas. His research interests include dynamics of multibody mechanical systems, spacecraft attitude dynamics and control, and orbital mechanics, and he has contributed to a wide variety of Agency projects and missions. He is author or coauthor of one book and numerous refereed journal papers. Dr. Roithmayr is a senior member of the American Institute of Aeronautics and Astronautics.

Inclusion in Standards Development

The Women in Standards (WIS) organization is working to recognize and improve under representation of persons and groups in Standards Development. They have recently published the results of surveying Standards Developing Organizations (SDO’s) on this topic and SAWE was one of the participating organizations. See our response and encouragement in this area and obtain a copy of the survey results on the WIS website. here

Solicitation for Consensus Body Members – Flight Vehicle Coordinate Systems, ANSI/SAWE STD A-6

SA Layout Template (NY-FILEMAKER-18)

The second solicitation for Consensus Body members for development of ANSI/SAWE Standard A-6 has posted publicly at  ANSI Standards Action May 15, 2020, page 40. With a response end date of 6/14/2020. This is a Call for Members (ANS Consensus Bodies) notice for directly and materially affected parties who are interested in participating as a member of an ANS consensus body. You do not have to be an SAWE member to participate in this Consensus Body.

We are  particularly looking to achieve balance of the consensus body which is currently heavy with the category User-Government. Other categories are under represented and persons wishing to participate with one of those representations in mind are welcomed on a priority basis. Others are welcome to apply as well, The participatory categories are:

  • producer: the product design/developer typically the manufacturer of the product in question
  • user-industrial: Where the standards activity in question deals with an industrial product, such as steel or insulation used in transformers, an appropriate user participant is the industrial user of the product.
  • user-government: Where the standards activity in question is likely to result in a standard that may become the basis for government agency procurement, an appropriate user participant is the representative of that government agency.
  • general interest: where an overseeing interested party may participate or other possible participant not involved in producing, directly using, or acquiring the product as a government user

A current draft of the standard is available from the contact noted below:

SAWE (Society of Allied Weights Engineers)

Contact: Jeffrey Cerro, (757) 570-1386,;

NASA Langley Research Center, MS 451, 1 N. Dryden Street, B1209, Hampton, VA 23681

New Standard

BSR/SAWE STD A-06-202X, Standard Coordinate System for Reporting the Mass Properties of Flight Vehicles RP A-6 (new standard)

Stakeholders: Aircraft, space craft, launch vehicle developers, and users.

Project Need: The recommended practice needs to be updated to incorporate additional scope, update relevant aspects that have evolved since the last major update [1999], and also go through the ANSI process to provide accredited consensus across the industry. Specifically, the RP to be updated is to include the scope of inertia topics that have impacted the missiles and space industry in the past and possibly prevent possible issues in the future. Typically used coordinate systems have also evolved over time and the recommended references need to be expanded upon to be more relevant. Incorporating the proposed additional scope into the standard will allow mass properties engineers to reduce errors or technical challenges regarding inertias and also update the coordinate system and other reporting aspect to be more current with respect to daily practices in the industry.

This standard will provide coordinate system designations for flight vehicles and standards for the placement of flight vehicle mass, center of gravity, and inertia with respect to vehicle features. Launch, space, and atmospheric vehicles are included in this standard.

Group Office: File Locking and Version Control

Group Office has proven itself to be immensely useful to me, for chapter activities, for document development and as a source of some of the more obscure or perhaps just time pertinent material. (If you’re running a conference you’ll really appreciate it !) One thing not commonly shown is how to have a configuration controlled document, edited sequentially by a group of people. There is a locking feature used to maintain control while you are editing the document. Along with the file version viewing capability, document editions are maintained as properties of the single document name to keep your group office space nice and tidy. See: Group Office Landing Page and scroll down to “File Locking and Version Control”