Orbital tug startup Impulse Space to develop its own unmanned lunar lander

Impulse's tug and proposed lunar lander
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The orbital tug startup Impulse Space, founded by Tom Mueller (one of SpaceX’s first engineers), is now proposing to build its own unmanned lunar lander, with a target for delivering six tons of cargo on two missions, starting in 2028.

Our proposed architecture combines our existing Helios kick stage and a new lunar lander, to be developed by our team in-house. Helios would launch on a standard medium- or heavy-lift rocket. Our lunar lander would ride as a payload on Helios. Once Helios and the lander are deployed in Low Earth Orbit (LEO), Helios serves as a cruise stage, transporting the lander to low lunar orbit within one week. The lunar lander then separates from Helios and descends to the surface of the Moon. By taking advantage of Helios’s high delta-v capabilities, this mission architecture doesn’t require in-space refueling.

This solution can bridge the existing cargo delivery gap by offering direct transportation of the necessary mass to kickstart infrastructure, resource utilization, and economic activities on the Moon. We’ve already begun engine development for our lunar lander solution, and we stand ready to execute as dictated by industry demand and interest.

With this Helios and Impulse-made lander combination, we estimate delivering up to 6 tons of payload mass to the Moon (across two missions) per year starting in 2028 at a cost-effective price point. Each Helios + lander combo would take approximately 3 tons of cargo to the Moon.

It appears the company has identified a need (transporting cargo to the Moon cheaply and quickly) that no one (including NASA) is presently considering. SpaceX will be able to do it with Starship. Blue Origin is also proposing to do it with various versions of its Blue Moon manned lander. Impulse has decided however that both of those spacecraft are too large and tied to SLS and Lunar Gateway, with Starship requiring refueling, that makes their cargo missions more costly than a direct mission. Impulse proposes a simpler option.

This decision is also another indication that the demand for low orbital tugs is not developing as expected. It appears satellite companies and the available rocket companies have worked out ways to get most of their satellites to the orbits they require without tugs.

It will be interesting to watch if this proposal gains traction. If it does, than it will likely encourage other orbital tug as well as the other lunar lander companies to propose their own alternatives.

Orbital tug startup Impulse raises $300 million in private investment capital

Following several large contract announcements in recent weeks, the orbital tug startup Impulse has now raised an additional $300 million in private investment capital, in addition to the $150 million it raised last year.

Impulse plans to use the funding for several initiatives. One is to scale up production of its Mira and Helios vehicles to better meet demand for them. The company says it has more than 30 signed contracts for those vehicles, a backlog worth nearly $200 million. Romo said the company is seeing increasing demand for Mira, the smaller of the two vehicles, for defense applications.

The company was founded by Tom Mueller, who was one of the principal engineers during SpaceX’s development of the Falcon 9. Mira is the smaller of the two tugs, and has flown one demo mission. The larger Helios tug has not yet flown, but the company recently won a contract with the satellite company SES to use it.

The company has also said it is developing its own rocket, but I suspect its first launch that will come later.

Orbital tug startup Impulse Space wins contract with satellite company SES

The orbital tug startup Impulse Space has won a contract to use its Helios tug to transport the satellites of the long established Luxembourg company SES to their correct orbit after launch.

The companies announced May 22 that they signed a multi-launch agreement that starts with a mission in 2027 where Impulse’s Helios kick stage, placed into low Earth orbit by a medium-class rocket, will send a four-ton SES satellite from LEO to GEO within eight hours. The announcement did not disclose the vehicle that will launch Helios and the satellite, or the specific SES satellite.

The agreement, the companies said, includes an “opportunity” for additional missions to transport SES satellites to GEO or medium Earth orbits.

This the first satellite tug contract for Impulse’s Helios tug, which is the larger of the company’s two tugs, the smaller version dubbed Mira. While Mira has completed an orbital demo mission, Helios has not yet flown, though it has three planned launches beginning in 2026.

Orbital tug startup Impulse Space buys three SpaceX Falcon 9 launches

The orbital tug startup Impulse Space announced yesterday that it has signed a contract with SpaceX for three Falcon 9 launches in order to fly its Helios orbital tug as well as its smaller Mira tug on several commercial missions.

The first launch, planned for mid-2026, will be the first flight of Helios. The transfer vehicle will transport the company’s smaller Mira vehicle, carrying a commercial optical payload, from low Earth orbit to geostationary transfer orbit on the Victus Surgo mission for the Space Force and Defense Innovation Unit. Impulse Space received a $34.5 million contract for Victus Surgo and another mission, Victus Salo, Oct. 3. Impulse Space said the schedule and payloads for the other two Helios launches will be determined later.

This development signals a major shift in the nascent orbital tug industry. Up until now the varous tug companies would buy launch space on rockets as secondary payloads. This I think is the first time a tug company has purchased the rocket itself as the primary payload, giving it the ability to control the rocket in order to make its tug operations more precise for all of its customers.

Orbital tug startup Impulse Space increases the kinds of satellites it will offer rides to geosynchronous orbit

The orbital tug startup Impulse Space, founder by former SpaceX engineer Tom Mueller, has announced new plans to make it possible for its tugs to take more kinds of satellites to geosynchronous orbit.

First, the company is revising the design of its larger Helios tug, set to do its first commercial mission in 2027, to carry multiple satellites ranging in weight from 300 to 5000 kilograms. Second, it is upgrading its already-flown smaller Mira tug so that it can be attached to Helios and act as a secondary tug once Helios gets to geosynchronous orbit.

The first Mira demo mission, launched in November 2023, had some communications and software issues but was still considered an overall success. The next mission will fly later this year.