New Mars Forums

Official discussion forum of The Mars Society and MarsNews.com

You are not logged in.

Announcement

Announcement: We've recently made changes to our user database and have removed inactive and spam users. If you can not login, please re-register.

#126 2018-02-03 20:12:38

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 19,929

Re: Falcon Heavy Assembly Underway

post #114 but here it is again

"The launch window on Feb. 6 would run from 1:30 to 4:30 p.m. ET (10:30 a.m. to 1:30 p.m. PT), with a backup window during the same hours on Feb. 7."

Which means I will be working and might only see the little dot from here if outside.....will need to look at the live feeds.....

Offline

#127 2018-02-04 04:25:49

elderflower
Member
Registered: 2016-06-19
Posts: 1,261

Re: Falcon Heavy Assembly Underway

Teaninich, 1983. Very near to Tain, Oldfart.
I might just drink a bit of it if the thing lights up properly.
I might drink a bit if it doesn't!

Offline

#128 2018-02-04 10:38:38

Oldfart1939
Member
Registered: 2016-11-26
Posts: 1,912

Re: Falcon Heavy Assembly Underway

elderflower-

Oh, wow! That's an old VINTAGE Single Malt! Lift a dram for me, too!

Offline

#129 2018-02-04 17:14:28

elderflower
Member
Registered: 2016-06-19
Posts: 1,261

Re: Falcon Heavy Assembly Underway

Yeah, I will do that Oldfart, and wish you long life and happiness.
My wife bought it for me. I would normally drink the Glenlivet from Dufftown, which is very nice and far less expensive.
Don't let Spacenut tell you we have gone off topic. This stuff is definitely rocket fuel!

Offline

#130 2018-02-04 17:27:41

GW Johnson
Member
From: McGregor, Texas USA
Registered: 2011-12-04
Posts: 4,103
Website

Re: Falcon Heavy Assembly Underway

You're in a long tradition here.  The V-2 was fueled with ethanol.

GW


GW Johnson
McGregor,  Texas

"There is nothing as expensive as a dead crew,  especially one dead from a bad management decision"

Offline

#131 2018-02-04 17:58:26

Oldfart1939
Member
Registered: 2016-11-26
Posts: 1,912

Re: Falcon Heavy Assembly Underway

GW is correct; 95% EtOH. Plus LOX.

Offline

#132 2018-02-04 20:34:35

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 19,929

Re: Falcon Heavy Assembly Underway

All drinking aside it sure will be fine to light that cigar......

Offline

#133 2018-02-04 23:52:43

RobertDyck
Moderator
From: Winnipeg, Canada
Registered: 2002-08-20
Posts: 6,231
Website

Re: Falcon Heavy Assembly Underway

Oldfart1939 wrote:

GW is correct; 95% EtOH. Plus LOX.

8820480278558.png

Offline

#134 2018-02-05 00:27:40

Oldfart1939
Member
Registered: 2016-11-26
Posts: 1,912

Re: Falcon Heavy Assembly Underway

OK, Robert; now all we need is the LOX!

Offline

#135 2018-02-05 12:03:57

elderflower
Member
Registered: 2016-06-19
Posts: 1,261

Re: Falcon Heavy Assembly Underway

Didn't the V2s use peroxide for an oxidiser?

Offline

#136 2018-02-05 12:41:42

RobertDyck
Moderator
From: Winnipeg, Canada
Registered: 2002-08-20
Posts: 6,231
Website

Re: Falcon Heavy Assembly Underway

Gunter's Space Page

Instead of a dummy mass, this flight contains Elon Musk's Tesla Roadster built in 2009 as a inert ballast and publicity stunt. The stage with the car attached is to be inserted into a deep space heliocentric orbit that will take it to the vicinity of Mars, but not into orbit around it. The car is mounted on an inclined customized adaptor and will likely not be seperated from the stage.

A SpaceX Spacesuit called "Starman" is placed into the driver's seat. Reportedly the car's sound system will play David Bowie's song "Space Oddity". There will also be a copy of Douglas Adam's "The Hitchhiker's Guide to the Galaxy" in the glovebox, along with a towel and a sign saying "Don't Panic".

Two lattice frameworks on the payload adaptor mount video cameras pointing at the car.

tesla-roadster__2.jpg

Offline

#137 2018-02-05 13:41:13

elderflower
Member
Registered: 2016-06-19
Posts: 1,261

Re: Falcon Heavy Assembly Underway

It seems V2 used peroxide only to drive the turbo pumps. Rocket oxidiser was indeed LOX.

Offline

#138 2018-02-05 13:51:45

GW Johnson
Member
From: McGregor, Texas USA
Registered: 2011-12-04
Posts: 4,103
Website

Re: Falcon Heavy Assembly Underway

The V2 chamber/nozzle assembly burned slightly-wet ethanol and LOX.  The turbopumps that fed it were powered by decomposition of high-strength hydrogen peroxide,  not by any sort of chamber gas bleed,  unlike most liquid engines today. 

Sorry - looks like this is already an obsolete posting.

Germany made quite a bit of hydrogen peroxide during WW2.  It was used for the V-2 turbopump power,  and for the catapult rail launcher for the V-1 Buzz Bomb.  Maybe one of the rocket-powered interceptor fighters,  too,  but I'm not sure about that off the top of my head. 

That pretty much exhausted their production capacity.  There wasn't enough to do a diesel submarine using peroxide instead of air while submerged,  so the Type XXI U-boat was instead powered underwater by a 4 times larger battery,  than the "regular" Type VII and Type IX U-boats. 

This combination of big battery plus extreme streamlining is what conferred 4 times greater underwater speed and 2 times endurance underwater.  This was the genesis of the USN GUPPY conversion program,  and the new Tang-class boats,  in the years after the war.  USN also explored diesel/peroxide power in one experimental boat,  but gave that up as too dangerous.  A high test peroxide explosion nearly sank that boat. 

GW

Last edited by GW Johnson (2018-02-05 13:53:46)


GW Johnson
McGregor,  Texas

"There is nothing as expensive as a dead crew,  especially one dead from a bad management decision"

Offline

#139 2018-02-05 15:19:57

elderflower
Member
Registered: 2016-06-19
Posts: 1,261

Re: Falcon Heavy Assembly Underway

Always interesting, GW!

Offline

#140 2018-02-05 16:27:19

Oldfart1939
Member
Registered: 2016-11-26
Posts: 1,912

Re: Falcon Heavy Assembly Underway

The Me 163 was powered by hydrogen peroxide/hydrazine hydrate.

Offline

#141 2018-02-05 18:18:10

Oldfart1939
Member
Registered: 2016-11-26
Posts: 1,912

Re: Falcon Heavy Assembly Underway

The Falcon Heavy is now on the launch pad, erect and awaiting the fueling process.

Offline

#142 2018-02-06 12:20:05

RobertDyck
Moderator
From: Winnipeg, Canada
Registered: 2002-08-20
Posts: 6,231
Website

Re: Falcon Heavy Assembly Underway

Live webcast on SpaceX at...
http://www.spacex.com/webcast

NASA TV will not cover the launch of Falcon Heavy, so check the above link.

Earlier this morning their website said launch at 1:30pm Eastern Time. Now they're saying 3:05 pm Eastern Time. It was only bumped back by an hour and a half, anyone know why?

Last edited by RobertDyck (2018-02-06 12:20:58)

Offline

#143 2018-02-06 12:45:07

Void
Member
Registered: 2011-12-29
Posts: 3,564

Re: Falcon Heavy Assembly Underway

I read "High altitude winds".


I like people who criticize angels dancing on a pinhead.  I also like it when angels dance on my pinhead.

Offline

#144 2018-02-06 14:25:01

RobertDyck
Moderator
From: Winnipeg, Canada
Registered: 2002-08-20
Posts: 6,231
Website

Re: Falcon Heavy Assembly Underway

Live coverage has begun!

Offline

#145 2018-02-06 14:34:16

JoshNH4H
Member
From: Pullman, WA
Registered: 2007-07-15
Posts: 2,526
Website

Re: Falcon Heavy Assembly Underway

If any of you guys are interested, I'll be hanging out on IRC to watch the launch.

You can go to webchat.freenode.net, pick a nickname, and then type in "/join #newmars" and hit enter to join!

I'll also be on #space.


-Josh

Offline

#146 2018-02-06 14:58:23

JoshNH4H
Member
From: Pullman, WA
Registered: 2007-07-15
Posts: 2,526
Website

Re: Falcon Heavy Assembly Underway

What a beautiful launch


-Josh

Offline

#147 2018-02-06 15:03:24

Terraformer
Member
From: Lancashire
Registered: 2007-08-27
Posts: 3,312
Website

Re: Falcon Heavy Assembly Underway

Did they decontaminate the roadster? If it crashes, there may well be life on Mars...


"I guarantee you that at some point, everything's going to go south on you, and you're going to say, 'This is it, this is how I end.' Now you can either accept that, or you can get to work." - Mark Watney

Offline

#148 2018-02-06 15:06:31

Josh Cryer
Administrator
Registered: 2001-09-29
Posts: 3,830

Re: Falcon Heavy Assembly Underway

Feels like my retirement plans are on track. Wonderful to watch history unfold like this. Seeing Starman and the Tesla backdrop against Earth my little Martian grandkids aren't going to believe it actually happened.

edit: Josh sorry couldn't catch you on IRC, watched on my phone.


Some useful links while MER are active. Offical site NASA TV JPL MER2004 Text feed
--------
The amount of solar radiation reaching the surface of the earth totals some 3.9 million exajoules a year.

Offline

#149 2018-02-06 15:30:34

elderflower
Member
Registered: 2016-06-19
Posts: 1,261

Re: Falcon Heavy Assembly Underway

So I am drinking  a bit of the single malt now. Your very good health Oldfart!
What a great result, despite Musk's attempts to manage expectations!

Offline

#150 2018-02-06 15:31:54

JoshNH4H
Member
From: Pullman, WA
Registered: 2007-07-15
Posts: 2,526
Website

Re: Falcon Heavy Assembly Underway

No problem Josh, great launch regardless.  If you're ever on there drop me a line on email/facebook and I'll jump on.

I'm a bit unclear on where the Tesla is actually going.  According to the SpaceX website, a FH's payload to Mars (Probably Mars Transfer Orbit?) is 16,800 kg, but a car doesn't weight nearly that much.  If they're using the full payload capacity they could be sending it out of the solar system entirely.

Their animation seemed to imply that the tesla is on a Hohmann transfer orbit, but Mars won't actually be there when the Tesla arrives.


-Josh

Offline

Board footer

Powered by FluxBB