Preparing a spacecraft to explore another planet requires solving engineering problems that cannot always be replicated in a traditional laboratory. For NASA’s DAVINCI mission, one of those problems was heat.
DAVINCI, short for Deep Atmosphere Venus Investigation of Noble gases, Chemistry, and Imaging, is being developed to investigate the atmosphere and surface of Venus. During its descent, the probe will have to withstand temperatures approaching 869°F (465°C), with the temperature rising to that level in less than an hour. NASA needed to demonstrate that the probe could endure that thermal environment while protecting the scientific instruments inside.
To recreate those conditions on Earth, NASA came to an unexpected place: Rex Heat Treat’s facility in Bedford, Pennsylvania.
Over approximately two weeks, the Rex Heat Treat team supported NASA as engineers repeatedly put an engineering model of the DAVINCI probe through simulated Venus descent conditions. What began with a phone call became an opportunity for Rex Heat Treat to contribute to a test NASA described as a “rousing success” and the most complete U.S. assessment of spacecraft-scale hardware at Venus temperatures since the mid-1970s.
In this article, we’ll look at:
The project started with a phone call.
NASA contacted Rex Heat Treat to determine whether the Bedford facility could support an unusually demanding thermal test. Rex responded, discussed the application, and welcomed NASA for a site visit.
From there, the teams determined that Bedford had the right equipment for the job.
That responsiveness was important because NASA was not looking for a standard heat treatment process. The team needed a facility capable of reproducing a very specific temperature ramp that simulated what DAVINCI would experience during its descent through Venus’ atmosphere.
For Rex, that meant understanding the requirement first and then determining whether its existing equipment could be adapted to support it.
That willingness to engage with an unusual application helped turn an initial inquiry into one of the most unique projects Rex Heat Treat has supported.
The critical requirement was not simply reaching a high temperature. NASA needed to reach that temperature at the correct rate.
During descent, DAVINCI is expected to heat to approximately 869°F in less than an hour. NASA therefore needed a furnace that could recreate that rapid heating profile as closely as possible.
Rex Heat Treat’s Bedford facility was particularly well suited for the task because of its gas-fired tempering equipment.
The testing used Rex’s 2240 furnace, a large-capacity box temper oven. Unlike an electric tempering oven, Bedford’s gas-fired equipment could heat rapidly enough to achieve the ramp rate NASA required.
That capability became one of the defining reasons NASA was able to conduct the evaluation at Rex. The furnace was not simply heating the vessel to a target temperature. It was helping recreate the thermal timeline of a real planetary descent.
Once testing began, Rex Heat Treat became closely involved in helping NASA execute each cycle.
NASA brought specialized monitoring equipment and instrumentation, while Rex helped operate the furnace and configure the process around the required test conditions.
The Rex team supported NASA by:
Rex helped monitor temperatures at multiple locations on the outside of the probe while NASA also collected readings from within the vessel.
Rex Heat Treat Quality Manager Dan Patterson worked directly with the NASA team, programming the equipment, starting the cycles, supporting data collection, and setting up the chart recorder.
The testing took approximately two weeks because the team could complete only about one cycle per day. DAVINCI’s probe is highly insulated, so after each test, the interior of the vessel needed substantial time to return to room temperature before the next cycle could begin.
NASA ultimately completed six thermal cycles, each designed to simulate the temperature profile expected during Venus descent.
For NASA, the testing represented an important milestone.
DAVINCI will spend nearly an hour descending through Venus’ dense atmosphere while collecting scientific measurements and transmitting data. Its instruments must remain protected as temperatures continue rising toward the planet’s surface.
The thermal evaluation at Rex was designed to help determine whether the probe’s insulation and overall design could withstand those conditions.
This was not an ongoing production program where the process could be refined over hundreds of parts. It was a limited, highly important test campaign intended to validate a core element of the spacecraft’s design.
Rex’s internal project notes reflect how significant that was. The team understood that the success of the thermal evaluation played an important role in determining whether the DAVINCI program could continue moving forward.
NASA reported that the probe completed the thermal cycles successfully, and NASA Principal Investigator Jim Garvin described the evaluation as a “rousing success.”
For Rex Heat Treat, helping NASA reach that point made the project especially meaningful.
Although the DAVINCI project was unusual, aerospace work is not new to Rex Heat Treat.
Rex installed its first vertical gantry in 1955, and in 1960 the company modified its facility to accommodate the Minuteman missile program. Those early aerospace and defense projects helped establish Rex’s experience with critical thermal processing applications.
More than six decades later, Rex once again found itself supporting a highly specialized aerospace program. This time, the destination is Venus.
What makes the DAVINCI opportunity especially noteworthy is how closely it reflects Rex Heat Treat’s broader approach to customer service.
NASA came to Rex with a highly specific problem. Rather than trying to force that application into a standard process, the Rex team worked to understand what NASA needed and determine how its capabilities could support the testing.
That combination of responsiveness, equipment capability, and process knowledge helped make the evaluation possible.
Rex Heat Treat’s role represents only one part of an extensive NASA mission involving engineers, scientists, spacecraft designers, and technical partners.
But it is still an important part.
The Bedford facility provided the thermal environment NASA needed to evaluate one of the major challenges DAVINCI will face during its descent. Rex personnel helped operate the equipment, program the cycle, position the hardware, monitor temperatures, and support the overall testing process.
For a fourth-generation heat treatment company, being publicly recognized as part of a NASA planetary science mission is a significant milestone.
Rex Heat Treat sees the opportunity as both an honor and a demonstration of what can happen when the right capabilities are paired with a willingness to take on an unusual engineering challenge. The company also hopes the successful project can open the door to future opportunities with NASA and other organizations working on demanding aerospace applications.
NASA needed to know whether DAVINCI could survive the rapid rise in temperature it will experience while descending through Venus’ atmosphere.
Rex Heat Treat’s Bedford facility helped provide the environment needed to answer that question.
Across two weeks of testing, Rex supported furnace programming, temperature monitoring, equipment operation, probe positioning, and data collection while NASA evaluated the thermal performance of the spacecraft.
The result was a successful test campaign and an important step forward for DAVINCI.
For Rex Heat Treat, the project represents much more than an unusual furnace application. It is another chapter in a long history of supporting critical aerospace work and a reminder that responsive service, process expertise, and the right equipment can create opportunities that reach far beyond the factory floor.