Author Topic: EXOS aerospace  (Read 123211 times)

Online Davidthefat

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Re: EXOS aerospace
« Reply #60 on: 03/15/2017 06:50 pm »
Quote
Tanks Have Arrived!

Our tanks are in the EXOS shop!

You may have heard that a tornado hit the Michoud facility. (We are so grateful that only minor injuries were reported, but you can read the rest of the update, here).

Our tanks are manufactured in the Michoud facility. The tornado delayed the tank completion and their delivery, but we are now moving on to the final assembly and final test!

We will need to recapture some time to make our projected April launch date, but we are still pressing on to see how close we can get to our projected date.

Of course, our safety process and risk mitigation activities will not be compromised to make the April date, but we are pushing within those limits!

http://exosaero.com/2017/03/13/tanks-have-arrived/

I'm sorry, call me immature, but given the size of the tanks, they look like oversized kegs. Perhaps they can modify a tank for that purpose for their Christmas party?




Offline EXOSBrett

Re: EXOS aerospace
« Reply #61 on: 03/17/2017 01:08 pm »
Hello guys,


Brett from EXOS here. I'll be here to answer any questions and if you need pictures I will get some for you. Don't hesitate to ask.



Offline ringsider

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Re: EXOS aerospace
« Reply #62 on: 03/17/2017 09:34 pm »
Well since you showed up I will do the courteous thing and ask a few questions:-

1) Isn't the market quite crowded now? What will allow you to succeed vs. others?

2) Do your plans include orbital services?

3) Are you an all-aluminum shop, or is CFRP on the horizon?

4) What do you think the teenagers over at Relativity Space are up to?

Offline Steven Pietrobon

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Re: EXOS aerospace
« Reply #63 on: 03/18/2017 08:20 am »
G'day Brett,

Thanks for letting us ask you questions. That is much appreciated. I see you have a suborbital launch planned for April. Can you tell us the name of the launch vehicle, what payloads are being carried and the current planned date for the launch? Thanks!
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline EXOSBrett

Re: EXOS aerospace
« Reply #64 on: 03/20/2017 01:08 pm »
Well since you showed up I will do the courteous thing and ask a few questions:-

1) Isn't the market quite crowded now? What will allow you to succeed vs. others?
Yes the market is crowded, but who is actually flying suborbital not just talking about it? Blue, Up, and NASA's BB. We feel that we will succeed because of our reusability. Our SARGE rocket is very durable.

2) Do your plans include orbital services?
Yes, but thats all I can comment on for now.

3) Are you an all-aluminum shop, or is CFRP on the horizon?
All aluminium (AvE reference)

4) What do you think the teenagers over at Relativity Space are up to?

I do not know, but I wish them the best



G'day Brett,

Thanks for letting us ask you questions. That is much appreciated. I see you have a suborbital launch planned for April. Can you tell us the name of the launch vehicle, what payloads are being carried and the current planned date for the launch? Thanks!


Yes, we are scheduled for April, however the FAA is pushing our launch license to May so the April timeframe will probably not happen.

The name of the launch vehicle is SARGE. It's an updated and upgraded Stig B. This mission will be called Pathfinder 0.

We are carrying various different payloads for universities that are CONUS and one in India. We also will have some FAA projects onboard as well. The next flight gets much more interesting.




SARGE is being put together as we speak. We are planning on doing a full tethered test in the coming weeks. Our engine has outperformed all expectations. 

Offline savuporo

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Re: EXOS aerospace
« Reply #65 on: 03/20/2017 02:10 pm »
1) Isn't the market quite crowded now? What will allow you to succeed vs. others?

Yes the market is crowded, but who is actually flying suborbital not just talking about it? Blue, Up, and NASA's BB. We feel that we will succeed because of our reusability. Our SARGE rocket is very durable.

Beautiful ! More flights, less grandiose announcements definitely needed from the industry.

This might be too early to ask, but what kind of turnaround time between experiment flights you might be able to aim for ?
Orion - the first and only manned not-too-deep-space craft

Offline EXOSBrett

Re: EXOS aerospace
« Reply #66 on: 03/20/2017 02:18 pm »
1) Isn't the market quite crowded now? What will allow you to succeed vs. others?

Yes the market is crowded, but who is actually flying suborbital not just talking about it? Blue, Up, and NASA's BB. We feel that we will succeed because of our reusability. Our SARGE rocket is very durable.

Beautiful ! More flights, less grandiose announcements definitely needed from the industry.

This might be too early to ask, but what kind of turnaround time between experiment flights you might be able to aim for ?


Well, ideally we would like to do two launches a week.

But for now, we have 6 launches planned for the remainder of 2017. 


We are currently building 2 rockets. SARGE 1 and SARGE 2.

Offline Kansan52

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Re: EXOS aerospace
« Reply #67 on: 03/20/2017 02:41 pm »
Will you launch out of Spaceport America? Will you still use the Wamore parafoil system?

Offline EXOSBrett

Re: EXOS aerospace
« Reply #68 on: 03/20/2017 02:56 pm »
Will you launch out of Spaceport America? Will you still use the Wamore parafoil system?

Yes and Yes.

We did some drop test with the recovery system and everything worked according to plan.

Online Davidthefat

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Re: EXOS aerospace
« Reply #69 on: 03/20/2017 03:14 pm »
Will you launch out of Spaceport America? Will you still use the Wamore parafoil system?

Yes and Yes.

We did some drop test with the recovery system and everything worked according to plan.

Are you sharing a pad with Up with mobile fueling stations? Or did you pour concrete for a brand new pad? To facilitate the projected 2 launches/week, do you have a hanger in Spaceport to support operations there?

Offline EXOSBrett

Re: EXOS aerospace
« Reply #70 on: 03/20/2017 03:21 pm »
Will you launch out of Spaceport America? Will you still use the Wamore parafoil system?

Yes and Yes.

We did some drop test with the recovery system and everything worked according to plan.

Are you sharing a pad with Up with mobile fueling stations? Or did you pour concrete for a brand new pad? To facilitate the projected 2 launches/week, do you have a hanger in Spaceport to support operations there?

We have our own pad. Everything we need comes with us on our mobile launch control trailer.

Offline Kansan52

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Re: EXOS aerospace
« Reply #71 on: 03/20/2017 03:26 pm »
I'm so looking forward to this!

Offline EXOSBrett

Re: EXOS aerospace
« Reply #72 on: 03/20/2017 05:01 pm »
I'm so looking forward to this!

As are we. There is a lot of hard work put into this rocket. We are ready to see it fly.

Offline Steven Pietrobon

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Re: EXOS aerospace
« Reply #73 on: 03/21/2017 07:55 am »
Thanks very much for answering my questions Brett. Best of luck for your first launch of SARGE.

Can you give us some specs for SARGE? Like propellants used, propellant mass, dry mass, payload mass, thrust, Isp, maximum altitude, length and diameter?

Does SARGE stand for anything?

Will you be doing a webcast of the launch?
« Last Edit: 03/21/2017 07:58 am by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline EXOSBrett

Re: EXOS aerospace
« Reply #74 on: 03/21/2017 03:39 pm »
Thanks very much for answering my questions Brett. Best of luck for your first launch of SARGE.

Can you give us some specs for SARGE? Like propellants used, propellant mass, dry mass, payload mass, thrust, Isp, maximum altitude, length and diameter?

Does SARGE stand for anything?

Will you be doing a webcast of the launch?

VEHICLE PURPOSE: R&D Flights followed by scientific payload flights under an FAA/AST Operator License
VEHICLE DESCRIPTION: SARGE (High Pressure Helium tank w/ Regulated to Blowdown Pressurization Transition)
DIMENSIONS MASS BUDGET
HEIGHT 36 FT DRY MASS 800 LBM
WIDTH 20 INS OD PAYLOAD & BALLAST 0 – 50 LBM
DEPTH (Tubular) 20 INS OD LOX (6.5-FT TANK) 970 LBM
PROPULSION FUEL (6.5-FT TANK) 670 LBM
MAX ULLAGE PERCENTAGE 5% EA. LOX & FUEL GLOW 2,440–2,490 LBM
PRESSURANT HELIUM REGULATED HP He VOLUME (WATER) 7.00** CU.FT.
INITIAL PRESSURE (TANK) 400 PSIG HELIUM INITIAL PRESSURE ~2,250 PSIG
INITIAL THRUST 5,420 LBF T/W INITIAL 2.22 : 1
FINAL PRESSURE (TANK) 400 PSIG MASS RATIO 2.93 : 1
FINAL THRUST 6,680 LBF T/W FINAL 7.85: 1


There will be live streaming available, just not sure on the details yet. 

Offline EXOSBrett

Re: EXOS aerospace
« Reply #75 on: 03/21/2017 03:46 pm »
We did just get our nose cone back from the manufacturer. It is in our ridiculously huge oven baking.

Its very exciting seeing each piece start to come together. We had a phone call with FAA AST today and it is looking like we will be getting our launch license for May 13.

Offline Proponent

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Re: EXOS aerospace
« Reply #76 on: 03/21/2017 10:46 pm »
If you have a regulator already, what is gained by switching over to blowdown?

Offline jongoff

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Re: EXOS aerospace
« Reply #77 on: 03/22/2017 12:59 am »
If you have a regulator already, what is gained by switching over to blowdown?

It allows you to control tank pressures and keep them high at the start of the burn when you need the most thrust and chamber pressure, but then reduces the overall amount of helium you need, because later in the burn you don't necessarily need the same feed pressure. Masten used the same approach on Xombie and Xoie. In our case letting the pressure decay over the flight also made it so we didn't have to provide as much pressure drop via the valves, which meant the valves didn't have to operate in their most sensitive range. I think SARGE mostly cares about the first two--high thrust at start, and lower GHe tank mass than 100% regulated.

~Jon

Offline Steven Pietrobon

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Re: EXOS aerospace
« Reply #78 on: 03/22/2017 05:33 am »
Thanks very much for those detailed specs Brett! As we're an international audience, here are the specs with their SI units. The specs say the LOX and fuel tanks are the same length. Is that correct?

Height 36 ft (10.97 m) Dry Mass 800 lbm (363 kg)

Width 20 in (508 mm) OD Payload & Ballast 0 – 50 lbm (22.7 kg)

Depth (Tubular) 20 (508 mm) INS OD LOX (6.5 ft (1.98 m) Tank) 970 lbm (440 kg)
Propulsion Fuel (6.5 ft (1.98 m) Tank) 670 lbm (304 kg)

Max Ullage Percentage 5% each. LOX & Fuel GLOW 2,440–2,490 lbm (1,107-1,129 kg)

Pressurant Helium Regulated HP He Volume (Water) 7.00** ft³ (198 L)

Initital Pressure (Tank) 400 psig (2.76 MPa) Helium Initial Pressure ~2,250 psig (15.5 MPa)

Initital Thrust 5,420 lbf (24.1 kN) T/W Initial 2.22 : 1

Final Pressure (Tank) 400 psig (2.76 MPa) Mass Ratio 2.93 : 1

Final Thrust 6,680 lbf (29.7 kN) T/W Final 7.85: 1
« Last Edit: 03/22/2017 05:33 am by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline savuporo

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Re: EXOS aerospace
« Reply #79 on: 03/22/2017 06:21 am »
Orion - the first and only manned not-too-deep-space craft

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