The Youngest Child has Left Home

Jane Baumann

My husband and I have been lucky to have two wonderful human children, one who is a mechanical engineer living and working in California and the other is in her last year of college (opting not to be an engineer). My husband is Jim Harris, a mechanism design engineer at Lockheed Martin.

Jim has also nurtured children of a different type: mechanical conceptions. Specifically, sample collection mechanisms. Although I have had nothing to do with these children, they have been the focus of his attention and consequently the focus of our dinner table conversations for many years.

The most recent child to leave home was TAGSAM, launched into space last week on board NASA’s OSIRIS-REx spacecraft to begin her 7-year journey to the asteroid Bennu and back home. There have been several articles in the news recently about this mission, but I would like to provide a different perspective. Namely, who is the man behind the Solo cup that the press keeps talking about? Everyone here at CRTech was excited about the launch since our software was used for the thermal design, but our staff members were also excited because of their personal connection with Jim.

With this blog post, I would like to recognize not only the OSIRIS-REx mission, but also Jim’s career working sample return missions. I'd also like to tell you about how he ended up in our driveway with that Solo cup

Stardust was launched in 1999. Its mission was to collect interstellar dust particles, along with particles from the tail of Comet Wild 2, in an attempt to learn more about the nature of comets and, hopefully, the origins of life. In 2006, Stardust returned the samples to Earth, concluding a very successful mission. The Stardust sample return canister (SRC) was given to the Smithsonian National Air and Space Museum in 2008. Jim designed a grid system of aerogel which would deploy at specific time intervals to collect the particles. Once the particles embedded themselves in the aerogel, the grid was safely stowed in the SRC. My son, who was in first grade prior to the launch, was perhaps the only kid in the world at that point in time to have the opportunity to share a sample of aerogel at show-and-tell.  

Stardust Sample Collection Grid
Stardust Sample Collection Grid (Photo credit NASA)

Jim was part of the design team for the SRC on the Genesis mission which launched in 2001. Genesis was a mission to collect solar wind particles to aid in the study of the Sun’s composition. This SRC was returned to Earth in 2004, landing at the Utah Testing & Training Range. The mission was a success and scientists were able to retrieve the particles for use in their studies. The sample grid for this mission was comprised of several hexagonal tiles of high purity materials such as sapphire, gold, silicon and carbon.

Genesis Sample Collection

Genesis Hexagonal Collector Array (Photo credit NASA)

Jim eventually joined Dr. Ben Clark and his team at Lockheed Martin performing small study proposals for future NASA missions. While in this group, Ben handed Jim a background paper and asked if he could use it to come up with an idea to collect regolith (loose surface material) from an asteroid.

Jim came home and spent the weekend in his shop with assistance from our son (then in 6th grade) prototyping and testing concepts for collecting dirt from our gravel driveway. One of these concepts was tested using a Solo cup and an air filter from a garden tractor.

Over the next few years, there were multiple proposals, study contracts, and zero-g flights, all nurturing the development of the TAGSAM (Touch-and-go Sample Acquisition Mechanism). Eventually Lockheed Martin was awarded the contract to build the spacecraft and TAGSAM. At this point, Jim joined the OSIRIS-REx team to follow through with the care of his mechanical child.

TAGSAM Deployment Test

Lockheed Martin TAGSAM Deployment Test (photo courtesy of Lockheed Martin)

Jim Harris Holding TAGSAM (photo courtesy of Lockheed Martin)

Last week Jim and I celebrated the beginning of TAGSAM’s celestial journey with a dinner of grilled steak, greens from our garden, and a nice bottle of cabernet sauvignon from the wine cellar. Of course, both kids called home to congratulate their dad.

While we wait for TAGSAM’s arrival at the asteroid Bennu, Jim will continue tinkering in his shop. He will be working on projects such as rocket stoves and Stirling engines, and of course trying to get me to create Thermal Desktop models for all his crazy ideas.

Recently, Dante Lauretta, OSIRIS-REx principal investigator, had an asteroid named for Jim. (He also did this for other key OSIRIS-REx players.) I consider this to be scientific proof that Jim is a rock, specifically my rock: stable, dependable, and often stubborn. It is reassuring to know that long after we leave this physical place, Jim’s presence will remain in this solar system, watching over his children.

Advanced Pipes in FloCAD
Thursday November 14, 9-10am MT (8-9am PT, 11am-noon ET)
This webinar introduces advanced features for FloCAD pipes in addition to working with complex geometry. Complex geometry includes interior fins and surfaces for heat transfer, flow around enclosed objects, annular flow, concentric pipes, and more. FK Locators and TEEs as modeling objects will also be introduced.
Custom Heat Transfer and Pressure Drops
Tuesday November 19, 2-3pm MT (1-2pm PT, 4-5pm ET)
Do you know what the default assumptions are in FloCAD, and whether or not they apply in your situation? Do you know how far you can go past that starting point? The answer: pretty far. There are numerous mechanisms in FloCAD for adjusting factors, scaling uncertainties, and applying different or supplemental correlations. This webinar summarizes the options available to you to customize your flow models to make sure that they apply to each new situation you encounter.
Heat Exchangers: Detailed and System-level
Thursday November 21, 2-3pm MT (1-2pm PT, 4-5pm ET)
This is two webinars in one. The first explains the use and assumptions behind the FloCAD HX system-level modeling object. The second webinar describes detailed-level modeling of complex heat exchanger passages, including application of Compact Heat Exchanger (CHX) methods.
Starting in 2020, we will begin offering Introduction to Thermal Desktop and Introduction to RadCAD as either in-person training or online training, alternating between online and in-person every three months. The training uses lectures and demonstrations to introduce you to basic Thermal Desktop and RadCAD usage. Hands-on tutorials provide practice building models and interpreting results (tutorials are completed by students outside of the online class time).
The next training class will be an online format in January 2020:
  • Introduction to Thermal Desktop (and SINDA) - A three-part series on January 14, 16, and 21 from 9am to 12pm, Mountain time
  • Introduction to RadCAD - January 23 from 9am to 12pm, Mountain time
For up-to-date schedules, fees, and policies, visit our Product Training page. To register for the class above, complete our registration form and select "Online" for the Training Format.
If you are interested in product training for your company based on your schedule, please contact us to obtain a quote for training between 8-12 attendees. We can come to your facility or the lectures can be presented online. Descriptions of the available classes can be found in our course catalog.
To keep up with our training opportunities, take a look at our new Events and Training Calendar.