German government hires German startup Polaris Spaceplanes to build reusable two-stage hypersonic plane

Mira-II prototype following first flight using
aerospike engine in October 2024.
The German government yesterday awarded a contract to the German startup Polaris Spaceplanes to build and fly a reusable two-stage hypersonic plane by 2027.
On 27 January, POLARIS Spaceplanes announced that it had been awarded a contract by the Federal Office of Bundeswehr Equipment, Information Technology and In-Service Support (BAAINBw) to build a fully reusable, horizontal take-off, two-stage hypersonic vehicle. The primary application of the Hypersonic Test and Experimentation Vehicle (HYTEV) will be as a hypersonic testbed for scientific and defence-related research. A variant of the vehicle with an expendable upper stage will also be capable of deploying small satellites into low Earth orbit.
According to the company, the HYTEV will be roughly the size and take-off mass of a fighter jet. The main stage will be powered by two turbofans and one of the company’s in-house developed aerospike rocket engines. The turbofans will be used for take-off and landing, and the rocket engine will accelerate the vehicle before upper-stage deployment. The upper stage will be entirely rocket-powered, with imagery accompanying the announcement appearing to show a more conventional rocket engine configuration compared with the aerospike engine equipped to the main stage. After completing its mission, it will likely be recovered under controlled glide conditions or potentially by a parachute or parafoil.
This deal appears to be an upgrade to a February 2025 German government deal with Polaris. It also follows Polaris’s successful use of an aerospike engine on a prototype test flight in 2024. While the company has shown some success, doing more than a dozen test flights with small scale prototypes (as shown in the image to the right), this program and schedule still seems quite ambitious.
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 print edition can be purchased at Amazon or from any other book seller. If you want an autographed copy the price is $60 for the hardback and $45 for the paperback, plus $8 shipping for each. Go here for purchasing details. 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

Mira-II prototype following first flight using
aerospike engine in October 2024.
The German government yesterday awarded a contract to the German startup Polaris Spaceplanes to build and fly a reusable two-stage hypersonic plane by 2027.
On 27 January, POLARIS Spaceplanes announced that it had been awarded a contract by the Federal Office of Bundeswehr Equipment, Information Technology and In-Service Support (BAAINBw) to build a fully reusable, horizontal take-off, two-stage hypersonic vehicle. The primary application of the Hypersonic Test and Experimentation Vehicle (HYTEV) will be as a hypersonic testbed for scientific and defence-related research. A variant of the vehicle with an expendable upper stage will also be capable of deploying small satellites into low Earth orbit.
According to the company, the HYTEV will be roughly the size and take-off mass of a fighter jet. The main stage will be powered by two turbofans and one of the company’s in-house developed aerospike rocket engines. The turbofans will be used for take-off and landing, and the rocket engine will accelerate the vehicle before upper-stage deployment. The upper stage will be entirely rocket-powered, with imagery accompanying the announcement appearing to show a more conventional rocket engine configuration compared with the aerospike engine equipped to the main stage. After completing its mission, it will likely be recovered under controlled glide conditions or potentially by a parachute or parafoil.
This deal appears to be an upgrade to a February 2025 German government deal with Polaris. It also follows Polaris’s successful use of an aerospike engine on a prototype test flight in 2024. While the company has shown some success, doing more than a dozen test flights with small scale prototypes (as shown in the image to the right), this program and schedule still seems quite ambitious.
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 print edition can be purchased at Amazon or from any other book seller. If you want an autographed copy the price is $60 for the hardback and $45 for the paperback, plus $8 shipping for each. Go here for purchasing details. 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

