Can the controversial rocket recovery route be successful in the 100-billion aerospace refinancing?

On April 24th, Qianyi Aerospace announced the successful completion of Series PreA1 - A3 financing rounds. The background of the investors and the scale of the financing were not disclosed.

It has been less than three months since Xingdong Wuji reported its Angel +++ round of financing at the end of January this year. This young commercial rocket company has once again received capital injection.

However, Qianyi Aerospace's recent attention is not just due to the financing.

The ADHL aerodynamic deceleration - horizontal landing approach it is betting on is facing rare public criticism in the commercial space industry.

The Moci Aerospace Technology Research Institute previously published an article, referring to this solution as a technological gimmick and raising questions from multiple aspects such as payload capacity calculation, engineering feasibility, thermal protection cost, supply chain adaptation, and business logic.

On one hand, capital continues to bet on it, while on the other hand, professional institutions strongly criticize it.

This gives Qianyi Aerospace's new financing a more complex industry significance. Is ADHL an underestimated Chinese - style rocket recovery path, or a technological adventure packaged as innovation?

I. Refinancing Amid Controversy: Qianyi Aerospace Pushes ADHL into the Verification Stage

According to the public information of Qianyi Aerospace, the funds from this round will be mainly used for the second - stage static ignition of the Xuan Niao - R Launch Vehicle, aerodynamic deceleration scaled - flight tests, wind tunnel tests, and in - depth research and development of core aerodynamic recovery technologies.

In January this year, Qianyi Aerospace's financing was mainly used for team building, the development of test rockets, and subsequent research and development. At that time, the full - scale test rocket of Xuan Niao - R had been produced and was expected to leave the factory in early February. At that stage, the company's core progress was to advance the test rocket from design to a physical object.

Now, the verification process has taken a step forward. Qianyi Aerospace disclosed yesterday that the full - scale test rocket of Xuan Niao - R has been officially rolled out, and the electrical joint adjustment of the control surfaces has been completed in combination with this rocket. Under the control of the servo system, the control surfaces simulated four types of working conditions: pitch, yaw, roll, and mixed control.

Xingdong Wuji believes that this milestone is worth recording, but it should not be over - interpreted.

ADHL relies on high - angle - of - attack aerodynamic deceleration. Large - sized control surfaces, servo systems, and electrical control are key links in the return control chain. Ground joint adjustment can indicate that some hardware has entered the collaborative testing phase, but it cannot prove that ADHL already has the recovery ability.

The real difficulties lie ahead. Whether the aerodynamic data is reliable, whether the high - angle - of - attack control is stable, whether the power system can cooperate with the terminal adjustment, whether the thermal protection can withstand the return environment, and whether the landing point accuracy can meet the recovery requirements will all be answered by subsequent tests.

The focus on this round of financing lies in the controversial nature of ADHL itself.

It challenges the currently more mainstream vertical recovery approach and also attempts to recalculate the payload loss and reuse economy of reusable rockets. Supporters see the possibility of burning less fuel and reducing the burden on the engine. Critics focus on the additional structural weight, thermal protection, control accuracy, and maintenance costs.

Xingdong Wuji found through sorting out that the controversy mainly focuses on two aspects:

The first is the system cost. Wing or lifting body structures, landing gears, full - rocket thermal protection systems, large - sized control surfaces, and aerodynamic drag during the ascent phase will all be included in the rocket's mass equation. If these costs are higher than the propellant saved during the recovery phase, the payload advantage of ADHL will be weakened.

The second is the reuse ability. Whether aerodynamic deceleration can bring a stable trajectory, whether horizontal landing can pass the tests of thermal protection, structural load, and landing point accuracy, and whether low - cost detection, maintenance, and re - launch can be achieved after recovery. These questions have not been answered by flight data.

The financing has bought Qianyi Aerospace more time for continued testing and has also pushed ADHL into a more rigorous verification cycle. Whether it is a technological branch worth tracking or a relatively costly route trial - and - error depends on the subsequent engineering data.

II. The "ADHL" Route Criticized as a Technological Gimmick

The controversy surrounding Qianyi Aerospace's ADHL solution has gone beyond the general differences in technical routes.

There is no shortage of route disputes in the commercial space industry. Vertical recovery, aerodynamic recovery, aerial capture, and tower capture all have their own engineering assumptions behind different solutions. It is normal for early - stage solutions to be questioned.

However, the criticism Qianyi Aerospace faces is more acute.

The Moci Aerospace Technology Research Institute called ADHL a "technological gimmick" and believes that this solution may mislead the industry's development. The relevant criticism systematically questions it from multiple aspects such as payload capacity calculation, engineering feasibility, thermal protection cost, supply chain adaptation, and business logic.

The first layer of doubt is about the payload capacity.

According to the statements of Qianyi Aerospace and its supporters, one of the core advantages of ADHL is to reduce engine reverse thrust through aerodynamic deceleration, thereby reducing the fuel consumption and payload loss during recovery.

An article on Taibo.com once quoted relevant theoretical calculations, stating that ADHL can reduce the fuel consumption for recovery from 38 tons to 3 tons, and the payload loss from about 23% in vertical recovery to 1% - 3%. (《Breaking Free from the Vertical Obsession: Is Aerodynamic Deceleration the "Chinese Solution" for Rocket Recovery?》)

Critics believe that this set of calculations is incomplete.

The payload loss in rocket recovery cannot only consider how much less fuel is burned during the recovery phase. It is also necessary to consider how much structural cost is paid for horizontal landing. Large - sized control surfaces, wing surfaces or lifting body structures, landing gears, horizontal landing support mechanisms, full - rocket thermal protection systems, and local structural reinforcements will all increase the dry weight of the rocket, thereby squeezing the payload.

At the same time, the horizontal landing configuration may change the aerodynamic shape of the rocket during the ascent phase. If large - sized control surfaces or wing surfaces increase the drag during the ascent phase, the resulting propellant consumption must also be included in the overall account.

Therefore, the controversy over ADHL does not lie in whether aerodynamic deceleration has a physical basis, but in whether the payload advantage claimed by Qianyi Aerospace is based on a complete calculation of the entire mission profile.

The second layer of doubt is about the engineering feasibility of the horizontal landing of the first - stage rocket.

Critics believe that after the separation of the first - stage rocket, it is in a sub - orbital return state, with limited speed, altitude, and available energy windows. Relying on aerodynamic deceleration and horizontal landing for recovery requires high requirements for the initial state, attitude control, meteorological conditions, landing point accuracy, and terminal adjustment ability.

This is not exactly the same as the re - entry of the space shuttle. The space shuttle is an orbiting vehicle with a more complete re - entry trajectory and glide adjustment space. The return window of the first - stage rocket is narrower, leaving less margin for the control system to correct deviations.

What ADHL needs to achieve is not just deceleration.

Commercial reusable rockets need to maintain a stable attitude in a complex aerodynamic environment, controlling the speed, altitude, attitude, and landing point within the recoverable range. If aerodynamic deceleration cannot be converted into a controllable trajectory, it will be difficult to form a stable reuse ability.

The third layer of doubt is about the thermal protection and maintenance costs.

Critics believe that the horizontal landing configuration may bring a more complex thermal environment. If ADHL maintains a high - angle - of - attack flight for a long time during the re - entry process, the leading edges of the wings, control surface hinges, landing support structures, and the lateral heated areas of the rocket body may all become difficult points for thermal protection.

This will directly affect the reuse economy.

The commercial value of reusable rockets is not only about bringing the first - stage rocket body back. More importantly, after it comes back, can it be quickly inspected, repaired at low cost, and stably launched again? If large - scale detection, repair, or even replacement of thermal protection components are required after each recovery, the manufacturing cost and propellant cost saved through reuse may be swallowed up by the maintenance cost.

The article on Taibo.com has a relatively open attitude towards ADHL, but it also mentions that the relevant calculations are still based on simulations and theoretical foundations, and the actual effects need to be verified by flight tests. The key variables include the maintenance cost of the thermal protection system and the damage rate of the rocket body structure.

The fourth layer of doubt is about supply chain adaptation.

Qianyi Aerospace and its supporters believe that ADHL can reduce the dependence on deep engine adjustment, multiple ignitions, and extreme thrust - to - weight ratios, and instead leverage China's accumulations in hypersonic vehicles, aerodynamic control, stainless - steel materials, and complex structure manufacturing.

Critics do not agree with this judgment.

They believe that the more mature parts of China's aerospace supply chain are mainly traditional cylindrical rocket bodies, liquid rocket engines, inertial navigation, and other conventional systems. Although vertical recovery has difficulties, it adds systems such as grid fins, landing legs, and variable - thrust engines on the basis of a mature rocket configuration, and the industrial chain extension relationship is relatively clear.

In contrast, the large - sized control surfaces, hypersonic reusable thermal protection systems, highly redundant flight control systems, and reusable landing mechanisms required by ADHL may be the parts with lower maturity, higher cost, and insufficient verification.

Therefore, in the view of critics, the core problem of ADHL does not lie in the novelty of the route, but in that its theoretical advantages may be based on incomplete system calculations.

If ADHL is just an early exploration, the industry can wait for the test results. But when it is described as a solution that can significantly reduce payload loss, adapt to China's supply chain, and represent the direction of the next - generation rocket recovery, it has to be subject to more severe scrutiny.

III. Another Set of Recovery Logic of Qianyi Aerospace

If only looking at the critical voices, ADHL can easily be understood as an adventurous route deviating from the mainstream.

However, from the perspective of Qianyi Aerospace and its supporters, this solution has its own technical logic. It attempts to re - disassemble the rocket recovery problem with another set of capabilities when China's commercial space industry has not fully developed the SpaceX - style vertical recovery ability.

Currently, the most successful example of global commercial rocket recovery is still the SpaceX Falcon 9. It represents the vertical recovery route, which is essentially an active deceleration solution. After the separation of the first - stage rocket, through multiple engine ignitions, reverse thrust deceleration, grid fin control, and terminal landing combustion, the high - speed falling rocket body is braked back to a controllable state.

This route has been fully verified, but the threshold is high.

The engine needs to have a reliable multiple - ignition ability, be able to deeply adjust the thrust, and maintain stable operation during the complex return process. The rocket body structure needs to be light enough, the control system needs to be precise enough, and the landing legs, grid fins, and propellant margin all need to be repeatedly balanced between payload and reliability.

The view supporting ADHL believes that if Chinese commercial space enterprises completely follow the path of SpaceX, they need to make up for deficiencies in multiple aspects such as engine performance, rocket body lightweight, control algorithms, and launch site recovery systems at the same time. This path has a relatively high certainty, but the cost of catching up is also high.

The idea of ADHL emerged in this context.

Taibo.com summarized vertical recovery as active deceleration and Qianyi Aerospace's ADHL as passive deceleration. The former mainly relies on engine reverse thrust to consume speed, while the latter attempts to use atmospheric drag to consume kinetic energy, leaving the main deceleration task to the aerodynamic process.

According to the supporters, ADHL does not deny the engine but only reduces the dependence on the engine's extreme performance.

The basic idea is that after the first - stage rocket re - enters the atmosphere, it flies at a high angle of attack in an inclined attitude, generating a large aerodynamic drag through the rocket body and control surfaces to decelerate in the atmosphere. After the speed is reduced to a certain range, horizontal landing is completed through a short - time ignition and attitude adjustment.

If this solution is feasible, in theory, it can reduce the propellant consumption during the recovery phase, reduce the reliability pressure caused by multiple engine ignitions, and extend the engine's service life.

The article on Taibo.com also mentioned that the supporters believe that ADHL can reduce the number of engine ignitions from 3 to 1 and shorten the ignition duration from 60 - 90 seconds to 10 - 20 seconds.

This is Qianyi Aerospace's reverse narrative.

Since Chinese commercial space enterprises still need to catch up in some engine extreme performance, can the capabilities in aerodynamic control, hypersonic vehicles, and complex aircraft overall design be transformed into another rocket recovery path?

According to the public information of Qianyi Aerospace, the company is also strengthening this ability narrative. It disclosed that the team members mainly come from the China Aerospace Science and Technology Corporation, China Aerospace Science and Industry Corporation, Aviation Industry Corporation of China, etc. Their professional directions cover the fields required for core rocket R & D and they have relevant engineering experience in hypersonic vehicles and launch vehicles.

This statement has practical significance. It shifts the rocket recovery problem from who is more like SpaceX to who can form a low - cost closed - loop based on local industrial capabilities.

But there is still a clear boundary here.

Aerodynamic deceleration itself is not a false proposition. Atmospheric drag can consume kinetic energy, and high - angle - of - attack control also has an engineering research basis. The problem is that the recovery of the first - stage rocket is a systematic project. It needs to solve the problems of mass increment, thermal protection, structural strength, attitude control, landing point accuracy, terminal landing, reuse maintenance, and commercial cost at the same time.

IV. Dissecting the Controversy

1. After Burning Less Fuel, Will the Newly Added Structure Eat Up the Advantages?

The first tough battle for ADHL is the payload capacity account.

Qianyi Aerospace and its supporters emphasize that this route can reduce engine reverse thrust through aerodynamic deceleration, thereby reducing the propellant consumption during the recovery phase. An article on Taibo.com once quoted relevant theoretical calculations, stating that ADHL can reduce the fuel consumption for recovery from 38 tons to 3 tons, and the payload loss from about 23% in vertical recovery to 1% - 3%.

This set of data represents the most important imagination space for ADHL.

However, critics believe that this account cannot only consider how much less fuel is burned. To achieve aerodynamic deceleration and horizontal landing, the rocket may need to add large - sized control surfaces or wing surfaces, control surface drive mechanisms, structural reinforcements, horizontal landing support mechanisms, thermal protection systems, and additional rocket body structure margins to adapt to high - angle - of - attack re - entry and landing loads.

All these weights will be included in the rocket's mass equation.

Burning dozens of tons less propellant may indeed bring benefits. But if a large amount of dry weight needs to be added to the rocket body to implement this solution, the payload advantage will be diluted again. For launch vehicles, the impact of dry weight increment is often more sensitive than intuition. Every increase in the structural weight of the first - stage rocket body not only affects the return phase but may also affect the ascent - phase propulsion efficiency and the overall rocket mass distribution.

Thermal protection and horizontal landing mechanisms are particularly crucial.

If ADHL requires a larger area of thermal protection, the thermal protection system itself will increase the weight. If support structures that can withstand horizontal landing impacts are also needed, these mechanisms will also bring additional mass. Coupled with large - sized control surfaces, servo systems, and local structural reinforcements, the dry weight increment of ADHL may not be low.

The drag during the ascent phase is also a variable.

To achieve high - angle - of - attack aerodynamic deceleration during the return phase, ADHL may need to add larger - sized aerodynamic control surfaces and control structures. If these structures bring additional drag during the ascent phase, it will increase the propellant consumption during the launch process and further affect the payload.

Therefore, the payload capacity account of ADHL cannot only consider the return phase.

To prove that it is more cost - effective, it needs to provide a system - level net account of the complete mission profile. This should at least include the dry weight increment of the complete recovery configuration, the drag loss during the ascent phase, the propellant saved during the recovery phase, the weight of the thermal protection and control surface structures, and the final change in the orbital insertion ability.

Before these questions are fully answered, the payload advantage of ADHL remains at the theoretical calculation stage.