Author Topic: Impulse Space  (Read 34027 times)

Online Hug

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Re: Impulse Space
« Reply #100 on: 01/28/2024 11:30 pm »
ORSC targeting ~375s. Gotta love it when a propulsion engineer like Mueller talks about the trades with a degree of depth. Duration is also brought up; they already have to have a reasonable amount of insulation given that they're launching inside a fairing, but was only thinking a couple days maybe.

Engine cycle discussion at this timestamp
« Last Edit: 01/29/2024 03:19 am by Hug »

Online gongora

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Re: Impulse Space
« Reply #101 on: 03/21/2024 04:32 pm »
Day and night shots of Mira and its Saiph thrusters in Earth eclipse. The night image, captured last Tuesday, shows our seventh burn, where all eight thrusters fired for ~60 seconds. They imparted 34 m/s delta-v, performed a plane change, and lowered Mira's orbit by ~30 km.

Online StraumliBlight

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Re: Impulse Space
« Reply #102 on: 04/02/2024 07:33 pm »
March 21st fireside chat "To LEO, GEO, and Beyond: A Conversation With Tom Mueller"

Offline deltaV

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Re: Impulse Space
« Reply #103 on: 04/03/2024 01:48 am »
March 21st fireside chat "To LEO, GEO, and Beyond: A Conversation With Tom Mueller"

At 5:58 "our main business is going to be Helios" and "the first commercial flight of that is in the second half of '26".

At 23:29 apparently commercial Helios customers will typically replace a slow (presumably solar-electric) transfer from GTO to GEO with Helios. Apparently government Helios customers are more likely to replace a Falcon Heavy with a Falcon 9 plus Helios, which supposedly saves cost and "operational difficulty". I wonder how government programs such as NASA LSP, NSSL lane 1, and NSSL lane 2 will handle Falcon plus Helios, which breaks the usual model of launch vehicles coming from a single company. Would Impulse be the prime contractor for the Falcon plus Helios 3-stage "launch vehicle" and buy the needed Falcon 9 flight from SpaceX? Or would NASA or the DOD or the satellite contractor buy Helios separately from launch (which IIUC is how solid kick stages are usually handled)?

Offline shiro

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Re: Impulse Space
« Reply #104 on: 04/03/2024 05:38 pm »

After four months navigating orbit, #Mira our first orbital transfer vehicle has successfully completed all of its primary mission objectives!

We celebrated the final milestone on Thursday with our eighth and most significant burn: 75 seconds in duration, achieving a 150 km apogee raise. 

We think this is the largest single maneuver to date by a nitrous-based propulsion system and the largest orbit raise by any OTV on its debut mission. The ability to change an orbit by hundreds of kilometers within minutes demonstrates the type of rapid maneuvering capability Impulse wants to bring to the industry. Mira's time in orbit isn't over yet we are continuing to test and fly, prepping for our next mission launching later this year.

All of this underscores the exceptional capabilities of the team we're building. If you'd like to join it, check our careers page (, or if you're attending the #SpaceSymposium next week, talk with us in person.


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