Author Topic: HyImpulse  (Read 16696 times)

Online TorenAltair

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HyImpulse
« on: 06/09/2020 10:44 pm »
As I haven't found an entry for HyImpulse..

German startup from Neuenstadt, Southern Germany (just around the "corner"), a kind of DLR (German Aerospace Agency) spin-off.

https://www.hyimpulse.de/en/

Hybrid propulsion, first sounding rocket, then smallsat launcher. Use of same engine (75 kN) but 11 of them in the 3-stage-orbital launcher. Paraffin-based fuel and liquid oxygen as propellants. Planned payload 500 kg.

Potential benefits they have: Lampoldshausen, European and German rocket test and development center, is just a few kilometers away.


Offline john smith 19

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Re: HyImpulse
« Reply #1 on: 06/10/2020 07:15 pm »
It's a spinoff from HyEND with their HEROS 1-3 rockets launched for the DLR STERN project.
HEROS used the HyReS 10 hybrid (N2O + Paraffin, 10kN) engine.
HyImpulse tested a 10kN LOx Paraffin hybrid engine, called HyPLOX10. See the youtube video.

The HyPLOX75 is larger scale hybrid rocketmotor using the same technology.

HyImpulse is a startup working on a sounding rocket. So shouldn't this be placed in the suborbital segment?
I think suborbital space has long been overlooked by the commercial market. Luckily this has changed in Europe.
They might be a entry in ESA BOOST!

So why is a hybrid rocket better than a solid or bi-liquid rocket?
And why is LOxParaffin better than LOx-HTPB, HTP-HTPB, HTP-Parrafin, N2O-HTPB/Paraffin?
I think it's not a winner, because of LOx. Sorry.
Well Hybrids have half the number of valves as a liquid.

The issue they've always had is the lower Isp than solids.  Some time ago NASA did a project to look at this. They reckoned you could do a hybrid with Isp matching or better than a solid if you could get the fuel to mix well enough. I forget who the contractors were but they were looking at basically paraffin wax, which seems to be what these guys are looking at.
MCT ITS BFR SS. The worlds first Methane fueled FFSC engined CFRP SS structure A380 sized aerospaceplane tail sitter capable of Earth & Mars atmospheric flight.First flight to Mars by end of 2022 TBC. T&C apply. Trust nothing. Run your own #s "Extraordinary claims require extraordinary proof" R. Simberg."Competitve" means cheaper ¬cheap SCramjet proposed 1956. First +ve thrust 2004. US R&D spend to date > $10Bn. #deployed designs. Zero.

Online TorenAltair

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Re: HyImpulse
« Reply #2 on: 06/10/2020 11:54 pm »
They want to build an orbital launcher out of the sounding rocket, that‘s why I posted this here. But like with every of the 100 small launcher startups I‘m very sceptical.
But if they start to build large „water towers“, I‘ll set up a live stream  ;D

Online gongora

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Re: HyImpulse
« Reply #3 on: 09/18/2020 02:55 pm »
https://twitter.com/HyImpulseTech/status/1306909124882563072
Quote
Test firing of our 75kN hybrid rocket motor at @DLR_de Lampoldshausen confirms that our proprietary Paraffin/LOX formulation for rocket propellants achieve the same high performance as liquid hydrocarbon-based fuels with simplified #propulsion system & at a fraction of the cost.

Online ParabolicSnark

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Re: HyImpulse
« Reply #4 on: 09/18/2020 07:07 pm »
This is my first time actually digging into their architecture for the Launcher SL1. The two things that jump out to me are:
1) The specific impulses they're quoting (270s SL, 313/321s vacuum) is quite respectable. Since they're showing videos of tests, I'm wondering if this is a target or based on test data.
2) They're planning on using a turbopump to feed the LOx into the motor. Is this the first pump-fed hybrid? How are they powering it? There are spherical tanks next to them, but I can't determine if that's hydrogen peroxide to power the turbine or if that's a pressurant bottle for the LOx tank.

Offline Asteroza

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Re: HyImpulse
« Reply #5 on: 09/23/2020 12:38 am »
I had always hoped somebody would 3D print an aluminum matrix and pour the paraffin over it to form the solid grain as a potential improvement

Offline Steven Pietrobon

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Re: HyImpulse
« Reply #6 on: 09/24/2020 03:35 pm »
You can download from the SSC manifest from the link below. Scroll down and click on "Launching Programme".

https://www.sscspace.com/news-activities/rockets-and-balloon-activities/
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online mandrewa

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Re: HyImpulse
« Reply #7 on: 09/28/2020 01:22 pm »
Quote
The hybrid enjoys several advantages over a liquid system. One of the main advantages is a reduced explosion hazard, since an intimate mixture of oxidizer and fuel is not possible. In addition, the hybrid rocket requires one rather than two liquid containment and delivery systems. The complexity is further reduced by omission of a regenerative cooling system for both the chamber and nozzle. A wide throttle range is relatively easy to achieve in a hybrid where throttling the oxidizer automatically throttles the fuel and there is no requirement to match the momenta of the dual propellant streams during the throttling operation. Throttling ratios up to 10:1 have been demonstrated in hybrid motors.

Lastly, the fact that the fuel is in the solid phase makes it very easy to add solid performance enhancing materials such as aluminum. This enables the hybrid to gain a specific impulse (Isp) and density advantage over a comparable hydrocarbon fueled liquid system. Metal additives can be used to reduce the O/F ratio for maximum specific impulse thereby enabling a reduction in the required mass of liquid oxidizer.

from "Scale-up tests of high regression rate liquefying hybrid rocket", M. Arif Karabeyoglu, Greg Zilliac, Brian J. Cantwell, Shane De Zilwa and Paul Castelluci (2003)

And,

Quote
Compared to a solid rocket the hybrid is much less sensitive to cracks and de-bonds in the propellant, has a higher specific impulse (Isp) and can be throttled including shutdown and restart on demand.

Offline CorvusCorax

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Re: HyImpulse
« Reply #8 on: 10/20/2020 10:40 am »

Offline russianhalo117

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Re: HyImpulse
« Reply #9 on: 11/23/2020 02:19 pm »
I wonder why HyEnD (student group) rocket motor tests are posted in the HyImpulse (company) topic.
For HyEnD and other German student groups we have the STERN topic in the suborbital section.
The HyFive and later HyLight are N2O Paraffin hybrid rocket engines developed by student group HyEnD.
Some post graduetes from HyEnD founded HyImpulse, but further than that the relation doesn't go.
Create a new thread and ask a mod to move the relevant posts.

Offline CameronD

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Re: HyImpulse
« Reply #10 on: 01/03/2021 11:17 pm »
Well.. they're obviously serious.  From Southern Launch's LinkedIn page:
Quote
In the latest December 2020 issue of NewSpace the business case of Southern Launch has been described in detail. The article called ‘Launching Smallsats: The Example of Southern Launch’ appeared in the NewSpace issue Vol 8 (4), pp. 201-212 (DOI:10.1089/space.2020.0034 - https://lnkd.in/gKNt8GN).

The article also features an artist impression of the HyImpulse SL1 micro-launcher (see picture) under development in Germany.  Southern Launch has a preliminary agreement with this company, which is offering South-Australia as a launch site for potential customers to reach polar orbits with payloads up to 500 kg.
With sufficient thrust, pigs fly just fine - however, this is not necessarily a good idea. It is hard to be sure where they are
going to land, and it could be dangerous sitting under them as they fly overhead.

Offline jpo234

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Re: HyImpulse
« Reply #11 on: 02/02/2021 11:58 am »
« Last Edit: 02/02/2021 12:01 pm by jpo234 »
You want to be inspired by things. You want to wake up in the morning and think the future is going to be great. That's what being a spacefaring civilization is all about. It's about believing in the future and believing the future will be better than the past. And I can't think of anything more exciting than being out there among the stars.

Offline PM3

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"Never, never be afraid of the truth." -- Jim Bridenstine

Offline CameronD

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Re: HyImpulse
« Reply #13 on: 03/11/2021 11:42 pm »
Quote
Hyimpulse:  Serial production of full-scale 75kN hybrid rocket motors has started.

Qualified and to be used on our Sounding Rocket and Small Launcher.

The inherent simplicity of hybrid system and the safe to handle choice of fuel (paraffin-candle wax) enables us to ramp up production easily (and anywhere!)

P.S. Test footages coming soon !
With sufficient thrust, pigs fly just fine - however, this is not necessarily a good idea. It is hard to be sure where they are
going to land, and it could be dangerous sitting under them as they fly overhead.

Offline CameronD

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Re: HyImpulse
« Reply #14 on: 06/21/2021 02:07 am »
From Facebook:
Quote
HyImpulse's 75kN HyPLOX75 Hybrid rocket motor Qualification tests at Shetland Space Centre


We have successfully started the first series of #qualification tests of our flight scale 75 kN #hybrid motor this week.

Thanks to our great #team, inherently safe hybrid motor system and mobile test bench, we have setup our infrastructure in just 2 weeks from arrival till the first hot fire tests! The maiden flight of this motor with our Sounding Rocket SR75 is scheduled for Q4 2021.

This important milestone puts us at the forefront of small launcher developments in Europe and the UK.

The campaign is currently underway on Shetland islands and is hosted by the Shetland Space Centre. Shetland Space Centre CEO Frank Strang said: “It has been a tremendously exciting two weeks at Scatsta, with the first rocket engine testing marking a major milestone in the development of the space industry in #Shetland.”

Big thanks to the great support and cooperation from Shetland Space Centre, Shetland Islands Council and our suppliers in the Shetland Islands.
With sufficient thrust, pigs fly just fine - however, this is not necessarily a good idea. It is hard to be sure where they are
going to land, and it could be dangerous sitting under them as they fly overhead.

Online trimeta

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Re: HyImpulse
« Reply #15 on: 06/21/2021 03:05 am »
Seems like a slight slip: they had been planning on launching SR75 in September, but now they're talking about Q4. Not entirely clear what implications (if any) that would have on their plans to launch SL1 to orbit in 2023.

Yes, I know, launch dates almost always move to the right, I'm just suggesting that by observing how HyImpulse's dates move in particular, we can get insight into the company.

Offline Yiosie

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Re: HyImpulse
« Reply #16 on: 09/03/2021 11:51 pm »
D-Orbit signs agreement with HyImpulse Technologies for joint EU-based launch and deployment mission

Quote
Space logistics and transportation company D-Orbit announced the signing of an agreement with HyImpulse Technologies aiming at a joint launch and deployment mission that will leverage HyImpulse’s SL1 launcher and D-Orbit’s ION Satellite Carrier.

SL1 is a three-stage hybrid rocket designed to transport to LEO satellites of up to 500 kg. ION Satellite Carrier (ION) is D-Orbit’s proprietary orbital transportation vehicle designed to ferry a batch of satellites across orbits and release each satellite into a customized orbital slot, while at the same time operating multiple hosted payloads during a single mission. This partnership will offer, for the first time, a combination of a launcher and orbital transportation vehicle that maximizes the mass of SL1’s payload to sun-synchronous orbit, and leverages ION Satellite Carrier to deploy satellites into orbits with distinct values of parameters like altitude, inclination, and local time of the ascending node (LTAN).

<snip>

The joint mission is targeted to launch in 2025.

Offline Redclaws

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Re: HyImpulse
« Reply #17 on: 09/04/2021 12:04 am »
Seems like a slight slip: they had been planning on launching SR75 in September, but now they're talking about Q4. Not entirely clear what implications (if any) that would have on their plans to launch SL1 to orbit in 2023.

Yes, I know, launch dates almost always move to the right, I'm just suggesting that by observing how HyImpulse's dates move in particular, we can get insight into the company.

“Launch dates always move” doesn’t mean the movement isn’t news. :) (It just means, as you suggest, it doesn’t have to be very troubling.)

Online trimeta

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Re: HyImpulse
« Reply #18 on: 03/16/2022 07:00 pm »
HyImpulse has completed an engine test campaign of their HyPLOX-75 hybrid motor, which will be used on their SR-75 sounding rocket.

https://twitter.com/HyImpulseTech/status/1504096640243798016

Based on this press release from a few weeks back, the plan is to launch Q3 2022, probably from the Shetland islands/SaxaVord (corroborated by the motor tests having apparently taken place there). That's nine months of slip since the last news we had...nine months ago. Which was itself a three-month slip after around three months without news. Ideally these values would converge...

Offline CameronD

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Re: HyImpulse
« Reply #19 on: 03/17/2022 02:25 am »
Here's a couple of snippets from LinkedIn.  Yes, it seems they are still talking Q3 this year:
Quote
On 2nd March 2022, HyImpulse rolled out its suborbital sounding rocket SR75 at its headquarters in Neuenstadt am Kocher, Germany.

Its maiden flight is expected in Q3 2022. In addition to being available to customers, it will also test tech for the company's larger SL1 vehicle.
With sufficient thrust, pigs fly just fine - however, this is not necessarily a good idea. It is hard to be sure where they are
going to land, and it could be dangerous sitting under them as they fly overhead.

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