Author Topic: Delft Aerospace Rocket Engineeing (DARE)  (Read 9524 times)

Offline Steven Pietrobon

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Delft Aerospace Rocket Engineeing (DARE)
« on: 12/24/2015 04:06 am »
Here's an amateur group from The Netherlands that has the European amateur rocket altitude record of 21.5 km with their Stratos II+ rocket on 16 October 2015 from the El Arenosillo base in Southern Spain. They were going for 50 km. There's a cool video. They are using a hybrid engine with nitrous oxide oxidiser and a mixture of sorbitol, paraffin and aluminium powder fuel.

http://dare.tudelft.nl/

Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #1 on: 12/24/2015 04:13 am »
Launch of Stratos I from Sweden on 17 March 2009 to an altitude of 12.5 km.

« Last Edit: 12/24/2015 04:16 am by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #2 on: 12/24/2015 04:22 am »
Stratos II misfire on 15 October 2014, also from Spain.

Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Rik ISS-fan

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #3 on: 01/25/2016 12:49 pm »
DARE has updated their site a bit lately. But first some things that have been known for some while.

First I will point to the Dare intrest drink presentation from last September. link (direct download)
Lots of information about current projects at DARE are in this presentation.

Last year in November there should have been a launch opportunity at 't harde (SLD 2015-3), but because nothing was reported about the event, most likely it was canceled because of bad weather. At least two events would have been executed by Dare in november. An liquid engine test, and the launch of the active controlled CSL v7s for the ACT team. Also a Transonic Reasearch Vehicle TRV-1 was planned but I'm not sure if it was build, and what the status is right now. The engine for this vehicle LEONIDAS 5 (or6) was the topic of the master thesis from Olga O. Motsyk. (it can be found online).

For this year there are three launch oportunities at 't Harde: SLD 2016-1 19&20 May, SLD 2016-2 27&28 may and SLD 2016-3 22&23 sept. At least three launches are planned (besided the Egg challange SRP). The CSL v7s from the Active Control Team, DRAD with the deimos F engine from the Deimos liquid engine team. And one more I will write about later.

Each year a minor is organised by dare for bachelor students. The engine test stand, that was used to test the DHX-200 Aurora, the hybrid engine that propelled Stratos II+ was developed during a previous minor. Two years ago the minor was about an active controlled rocket, the Active Control Team (ACT) developed from this.
The purpose of this years minor is to design a test-bench for a 10kN cryogenic engine.

Along with this minor a new team has been formed the Cryogenic team. Their goal is to develop a 10kN LOx-LCH4 (methane) engine. This engine will be tested on test-bench build during the minor at DLR Trauen. The engine is developed with cooperation of (Italian) CIRA.

Than the latest change: a new Project AETHER.
This is a shared project between Solid Six, Capsule Team and Advanced Control Team. The purpose of the project is to test new technologies that will be used in Stratos III. The ACT is going to test their Stability Augmentation System at supersonic speeds during this launch. And the Capsule and Recovery team is developing a new recovery system that can operate at more conditions.
The rocket will fly be four meters tall (~157,5") is aimed to reach 6km altitude (half the altitude of Stratos I) and will be powered by the solid engine Leonidas 5 or 6 with 38kg (~85,4lb) of Kalinidex (>30kNs, 6,5kN O-class). It is planned to be launched November 2016 from the Netherlands, but I couldn't find a launch window during this period. That was all I had about DARE

Offline Rik ISS-fan

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #4 on: 01/25/2016 12:55 pm »
Here also a link to DARE's facebook page and the

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #5 on: 03/21/2016 03:36 pm »
Dare has updated their website, with more info about AETHER

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #6 on: 10/26/2017 02:19 pm »
DARE made a image with most of the rockets DARE has developed.
DARE Tweet; DARE Facebook; Instagram

I forgot to add this:
« Last Edit: 10/26/2017 02:21 pm by Rik ISS-fan »

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #7 on: 12/03/2017 07:41 pm »
DARE | DHX-400 'Nimbus' Hybrid Rocket Test 9


Delft Aerospace Rocket Engineering
Published on Dec 3, 2017


A student society that builds a record-breaking hybrid rocket engine powerful enough to lift an SUV? Check out the ninth engine test video.   Unfortunately, 12 seconds into the burn an engine failure occurred.

Currently, it is believed the failure was caused due to an injector failure. It is hypothesized that the injector overheated due to an instability causing an increase in Oxidiser mass flow, which led to the chamber wall overheating and finally failing. A low and high-frequency oscillation event has been seen in the data and research to minimise these oscillations is being conducted.
Our engineers are working hard on a forensic analysis to discover the cause and find a solution.

Due to our thorough safety procedures, no personnel was here harmed, however, one pumpkin was never seen again.

https://www.youtube.com/watch?v=UdCQrwyjMOE?t=001

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #8 on: 12/03/2017 10:31 pm »
The DARE STRATOS III team also saw pressure oscilation during the 8th Nimbus 400 (kNs) engine test. The video is on youtube.
The STRATOS team also went to Germany to visit WARR and sponsors MT Aerospace and Winkelmann.
Thanks to those two companies, GKN Fokker and Airbore; DARE can use a COPV N2O tank on Stratos III.
Tweet with test tank production.
« Last Edit: 12/03/2017 10:32 pm by Rik ISS-fan »

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #9 on: 12/08/2017 07:37 pm »
Dare updated their website with the Stratos III Technical Overview.
Let's also add this facebook burst test video
« Last Edit: 12/08/2017 07:38 pm by Rik ISS-fan »

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #10 on: 12/13/2017 04:31 pm »
DARE | Cryogenic Engine Igniter Test

Delft Aerospace Rocket Engineering
Published on Dec 13, 2017

A student society that builds a record-breaking hybrid rocket engine powerful enough to lift an SUV?  The Cryogenic Propulsion Team recently tested their spark torch igniter for the second time. Watch the video to check it out!

https://www.youtube.com/watch?v=dMfXxhnp1_Q?t=001

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #11 on: 02/23/2018 02:05 pm »
Some news on StratosIII:

Launch site will be at INTA Spain ; tweet
DARE article about the recovery system

video from DHX-400 Nimbus engine test 11, the full duration burn of this ~400kN.s N2O Sorbitol-Parafin-Aluminium hybrid engine.


edited to add: oerlikon Article
« Last Edit: 02/23/2018 02:10 pm by Rik ISS-fan »

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #12 on: 06/07/2018 12:45 pm »
Quote
This launch tower will be raised in only 40 days! Don't miss the rocket launch on 16th of July 🚀

https://twitter.com/DARE_TUDelft/status/1004700478012297217

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #13 on: 07/13/2018 08:33 pm »
Stratos III rocket ready to launch

Delft Aerospace Rocket Engineering
Published on Jul 13, 2018

The Stratos III launch campaign has started! Our first launch attempt is on July 18, 2018, at 9.35 PM CEST. The live stream will be available at http://dare.tudelft.nl/live-stream/ and on this channel!

https://www.youtube.com/watch?v=odO-sIocnlM?t=001



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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #14 on: 07/13/2018 11:39 pm »
I think a fitting motto for the Stratos III launch operation is:
'Students testing the path for the professionals!' 😀
The best of luck DARE.

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #15 on: 07/15/2018 10:18 am »
Tweet from DARE:
The first launch attempt of Stratos III has been rescheduled to the 20th of July at 20:00 CEST. The Flight Termination System, a crucial component of the rocket, is currently stuck at customs in the U.S. which forced us to postpone the launch.

Darn ITAR. Wasn't there a European alternative?
20:00 CEST = 18:00 UTC.
« Last Edit: 07/15/2018 10:22 am by Rik ISS-fan »

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #16 on: 07/18/2018 04:47 pm »
Delay #3 tweet:
The launch of #StratosIII has been rescheduled to Tuesday July 24 at 20:00 CEST, due to a significant delay in shipping the Flight Termination System, which is currently stuck at customs in the US. As safety has our highest priority, a rescheduling of the launch was inevitable.

 >:( :( :-X

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #17 on: 07/24/2018 04:13 pm »
live video.

Stratos III: Rocket Launch
Delft Aerospace Rocket Engineering
Started streaming 3 hours ago

We're launching the biggest rocket in the history of DARE - Stratos III. Our goal - break the European student altitude record! Don't miss the rocket lift-off at 9 PM CEST.

https://www.youtube.com/watch?v=VEcNf0Xqf_I?t=001

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #18 on: 07/24/2018 06:26 pm »
Launch has been cancelled for today.
Winds are not favourable.
« Last Edit: 07/24/2018 06:26 pm by Olaf »

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #19 on: 07/25/2018 06:08 am »
Quote
☀ Good morning fellow rocket enthusiasts! Another day, another launch attempt. Let's hope the weather is in our favor today 🙏 #StratosIII

https://twitter.com/dare_tudelft/status/1021991003182559233

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #20 on: 07/25/2018 12:17 pm »
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The tower is now being raised and we are ready for the countdown. T-6:53 hours remaining 🕒

https://twitter.com/dare_tudelft/status/1022090772970184706

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #21 on: 07/25/2018 05:41 pm »
Stratos III: Rocket Launch Attempt 2

Delft Aerospace Rocket Engineering
Started streaming 5 hours ago

We're launching the biggest rocket in the history of DARE - Stratos III. Our goal - break the European student altitude record! Don't miss the rocket lift-off at 9 PM CEST

https://www.youtube.com/watch?v=ZP_qz_A13Vw?t=001

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #22 on: 07/25/2018 09:17 pm »
Currently holding at T-15:00

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #23 on: 07/25/2018 10:30 pm »
They want to heat the oxidizer vessel for the pressure to reach 60 bar, to achieve optimal engine thrust. It seems that their method of heating is quite slow and it will probably take another hour or so. By the way, there was some venting from the rocket, because they had some mass sensor issues during tanking and had to release excess mass.

I hope they manage to launch it, I'm in the student team that builds rockets too, so it's another reason to support them. :)
GO for launch, GO for age of reflight

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #24 on: 07/25/2018 11:31 pm »
Quote
We are still planning to launch. We just vented to our final fill mass. Please Stand by!

So there's still a chance for a launch today. I don't know the precise launch window, but I've been told it ends "sometime in the morning", and it's 1:30 AM at the launch site right now.
GO for launch, GO for age of reflight

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #25 on: 07/26/2018 12:56 am »
Hold released. T-14 minutes. Targeted T0 is 0111 UTC.
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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #26 on: 07/26/2018 01:10 am »
Holding at T-60 seconds to configure the FTS for launch.
"For Sardines, space is no problem!"
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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #27 on: 07/26/2018 01:16 am »
T-60 seconds and counting.
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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #28 on: 07/26/2018 01:17 am »
LIFT-OFF!
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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #29 on: 07/26/2018 01:17 am »
FAILURE! VEHICLE LOST!
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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #30 on: 07/26/2018 01:18 am »
Test Conductor has instructed the team to remain at their stations.
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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #31 on: 07/26/2018 01:21 am »
Looks like full vehicle break up at T+19 seconds with the failure beginning at T+17 seconds.
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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #32 on: 07/26/2018 01:22 am »
No fires at the pad confirmed but TC wants everyone to stay indoors for now.
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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #33 on: 07/26/2018 01:26 am »
More information to come:
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"We're rolling in the wrong direction but for the right reasons"
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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #34 on: 07/26/2018 01:31 am »

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #35 on: 07/26/2018 01:35 am »
Recorded captures of the vehicle failure. First is at T+17 seconds and the second is at T+20 seconds. The break up is clearly visible to the ground IR camera in the lower right view.
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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #36 on: 07/26/2018 01:40 am »
Live stream ended. Information will be released on the relevant social media accounts.
"For Sardines, space is no problem!"
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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #37 on: 08/31/2018 05:14 pm »
Stratos III Rocket Launch Aftermovie

Delft Aerospace Rocket Engineering
Published on Aug 31, 2018

This is the official after movie of the Stratos III sounding rocket launch on July 25 at 3.30 AM CEST. As can be seen in the footage, 20 seconds into the flight, an anomaly occurred, resulting in a loss of the vehicle. We are currently still investigating this anomaly and will keep you up to date via our social media once we know more!

https://www.youtube.com/watch?v=_b_xWWojIiM?t=001

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #38 on: 09/02/2018 11:44 am »
Apperently the video posted by catdlr shouldn't have been made public. It showed a small KNDX rocket motor test.
Also the Stratos advanture continues with Stratos IV, planned for launch in 2019.

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #39 on: 09/03/2018 07:17 am »
Apperently the video posted by catdlr shouldn't have been made public. It showed a small KNDX rocket motor test.
Also the Stratos advanture continues with Stratos IV, planned for launch in 2019.

Yep, post deleted.
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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #40 on: 09/10/2018 07:30 pm »
Apperently the video posted by catdlr shouldn't have been made public. It showed a small KNDX rocket motor test.
Also the Stratos advanture continues with Stratos IV, planned for launch in 2019.

Yep, post deleted.
That video isn't available any more. But a new one is on twitter.

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #41 on: 10/28/2018 07:45 pm »
Spark Torch Rocket Igniter Test


Delft Aerospace Rocket Engineering
Published on Oct 28, 2018

Test of the spark torch igniter performed by the Cryogenic Propulsion Team on October 16, 2018. The igniter uses gaseous hydrogen and oxygen to produce a hot flame to igniter the ethanol-liquid engine. Note that due to the extremely high temperature of the hydrogen-oxygen reactants, (almost) no flame is visible.

Delft Aerospace Rocket Engineering is a team from Delft University of Technology and one of the leading student rocketry teams in the world. Follow us on social media to stay up-to-date!

https://www.youtube.com/watch?v=IZWJ1uzVeKg?t=001

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #42 on: 12/24/2018 10:08 am »
DHX-400 'Nimbus' Hybrid Rocket Engine Test 17


Delft Aerospace Rocket Engineering
Published on Dec 24, 2018

Test 16 of the DHX-400 'Nimbus' hybrid rocket motor for the Stratos IV student built sounding rocket.

Delft Aerospace Rocket Engineering is a student-team of Delft University of Technology and one of the largest and most advanced student rocketry teams in the world.

https://www.youtube.com/watch?v=9rQRSheZFBY?t=001

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #43 on: 02/15/2019 04:43 pm »
In the Netherlands, there is a student rocket program named Stratos IV, which is aiming to shoot for space in the summer of 2019. Stratos IV is a hybrid rocket developed by Delft Aerospace Rocket Engineering (DARE), an 18 year old student rocketry team of members of the TU Delft. DARE designs, develops and tests experimental rockets for scientific purposes.

In the past DARE already made significant progress on its way to space, with Stratos II+ reaching 21.5 km in 2015. Its successor, Stratos III was launched in the summer of 2018 with the goal to get even closer to space. Unfortunately, due to an anomaly, the 8.2-meter tall vehicle disintegrated at roughly 10 km altitude.

Based on the capabilities and potential of the Stratos III design, Stratos IV was developed and builts on DARE's hybrid rocket technology. The vehicle features active roll stabilization and the most powerful student-built hybrid engine in the world, we a peak thrust of 25 kN. The design is recently revealed, and the vehicle is currently under construction for its space shot in August 2019.

Find their new design in the video below!
https://www.youtube.com/watch?time_continue=3&v=H5lGYTb1jOw
« Last Edit: 02/15/2019 04:44 pm by dare »

Offline Rik ISS-fan

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #44 on: 02/15/2019 06:46 pm »
dare welcome on NSF. Are you related to the DARE society?

I found this Delta (TU Delft) Article: https://www.delta.tudelft.nl/article/dare-rocket-team-shoots-space
Launch from the Denel Overberg test rangein South Africa.
AFAIK Dare is building two rockets for their Stratos IV launch mission. They are developed from Stratos III, the titanium nozzle was already developed for Stratos III but it wasn't ready in time. Dare will use it on Stratos IV.

Are you taking the NLR flight computer as payload again?
« Last Edit: 02/15/2019 07:01 pm by Rik ISS-fan »

Offline Steven Pietrobon

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #45 on: 02/16/2019 03:20 am »
Based on the capabilities and potential of the Stratos III design, Stratos IV was developed and builts on DARE's hybrid rocket technology. The vehicle features active roll stabilization and the most powerful student-built hybrid engine in the world, we a peak thrust of 25 kN. The design is recently revealed, and the vehicle is currently under construction for its space shot in August 2019.

Thanks for the update and best of luck on the launch. Can you tell us where Stratos IV is launching from?
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline dare

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #46 on: 02/16/2019 08:21 am »
dare welcome on NSF. Are you related to the DARE society?

I found this Delta (TU Delft) Article: https://www.delta.tudelft.nl/article/dare-rocket-team-shoots-space
Launch from the Denel Overberg test rangein South Africa.
AFAIK Dare is building two rockets for their Stratos IV launch mission. They are developed from Stratos III, the titanium nozzle was already developed for Stratos III but it wasn't ready in time. Dare will use it on Stratos IV.

Are you taking the NLR flight computer as payload again?

Indeed the titanium nozzle was already developed for Stratos III, however, some slight modification will be made for Stratos IV. In addition, the team is also eliminating the heavy aluminum combustion chamber, and replacing this by a fully composite chamber.

As you can read in the article of DELTA, the current plan is indeed to launch from the Denel Overberg Test Range. With regards to the payload, Stratos IV will again fly one (or multiple) scientific payloads on its journey to the Karman line. We will soon share more details about the exact payloads that Stratos IV will fly!

Offline Rik ISS-fan

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Re: Delft Aerospace Rocket Engineeing (DARE)
« Reply #47 on: 02/16/2019 05:16 pm »
Very good job by also replacing the aluminium combustion chamber by a composite one.
I've four questions concerning the composite combustion chamber:
1) Are you using carbon-fiber or glas-fiber for the chamber.
2) DARE has experience with glass-fiber, do you also have experience with carbon fiber casings?
3) Is the solid six (or alumini) involved with the composite casing development or is it part of StratosIV.
Lastly 4) are further static tests planned to prove the composite casing together with the titanium nozzle?

Another question came to mind: are you using the same oxidizer injection system as on stratos III?Or did you have to change it for the composite combustion chamber.

Thanks for the info. I'll anxiously wait for more detail about the payload.
Is there another croudfunding planned?
« Last Edit: 02/16/2019 05:21 pm by Rik ISS-fan »

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