Ye Olde Rocket Forum

Go Back   Ye Olde Rocket Forum > Weather-Cocked > FreeForAll
User Name
Password
Auctions Register FAQ Members List Calendar Today's Posts Search Mark Forums Read


Reply
 
Thread Tools Search this Thread Display Modes
  #11  
Old 01-26-2018, 10:49 AM
tbzep's Avatar
tbzep tbzep is offline
Dazed and Confused
 
Join Date: Mar 2005
Location: TN
Posts: 8,396
Default

Quote:
Originally Posted by kapton
1.6 million pounds vs 2.8 million pounds excess thrust.
Now tell me the lift off mass of the FH vs the liftoff mass of a Saturn V. Then you can compare accelerations.

I gave you the weights and the thrust. You can convert to weight on earth to mass quite easily.
__________________
I love sanding.
Reply With Quote
  #12  
Old 01-26-2018, 10:52 AM
luke strawwalker's Avatar
luke strawwalker luke strawwalker is offline
BAR
 
Join Date: Dec 2007
Location: Needville and Shiner, TX
Posts: 5,784
Default

Quote:
Originally Posted by tbzep
3.1 million pound rocket with 4.7 million pounds of thrust. 1.6 million pound difference. IIRC, the Saturn V weighed a tad over 5 million and produced 7.8 million, so a difference of nearly 2.8 million lbs. The Falcon Heavy will creep off the pad if that's any indication. It should be really cool...even if it fails!


4.7m lbs thrust divided by 3.1 m lbs rocket = 1.51 Thrust/Weight ratio for FH
7.8m lbs thrust divided by 5 m lbs rocket = 1.56 T/W ratio for Saturn V

Pretty similar... Should look about the same.

1.7m lbs thrust / 1.2 m lbs rocket = 1.41 T/W ratio for Falcon 9 currently flying

If anything, FH should have a little more "giddy-up-go" than the current Falcon 9...

6.78m lbs thrust / 4.47 m lbs rocket = 1.51 T/W for shuttle

Same as Falcon Heavy, so the liftoff should be about the same.

Later! OL J R
__________________
The X-87B Cruise Basselope-- THE Ultimate Weapon in the arsenal of Homeland Security and only $52 million per round!
Reply With Quote
  #13  
Old 01-26-2018, 11:20 AM
Jerry Irvine's Avatar
Jerry Irvine Jerry Irvine is offline
Freeform rocketry advocate.
 
Join Date: Jan 2008
Location: Claremont, CA "The intellectual capitol of the world."-WSJ
Posts: 3,372
Default

Musk hired 4 guys before Falcon existed from my group for top level positions. Now look what they have done! F'n amazing.

Just Jerry
__________________
Exemptions not regulations. Please support DOT treating slow burning solids as not subject to HMR. 2015 NAR President declines!
U.S. Rockets instaship. http://bit.ly/1aca7mA Please buy some rockets.
The O administration believed in tax, spend, borrow, fine, mandate, monologue. D voters will soon be very happy with the election outcome!
Model rocketry is as safe as safe can be defined in human existence. Bow and pray: GH Stine, Orville, Vern, Lee, Lonnie, Carl, etc. No, really.
Reply With Quote
  #14  
Old 01-26-2018, 12:55 PM
Royatl's Avatar
Royatl Royatl is offline
SPEV/Orion wrangler
 
Join Date: Mar 2005
Location: Atlanta, GA
Posts: 2,204
Default

Quote:
Originally Posted by luke strawwalker
7.8m lbs thrust divided by 5 m lbs rocket = 1.56 T/W ratio for Saturn V


Apollo Saturn V was actually 7.6 / 6.2 m lbs at liftoff for a 1.22 T/W ratio.
__________________
Roy
nar12605
Reply With Quote
  #15  
Old 01-26-2018, 02:51 PM
blackshire's Avatar
blackshire blackshire is offline
Master Modeler
 
Join Date: Jan 2009
Location: Fairbanks, Alaska
Posts: 5,477
Default

Quote:
Originally Posted by tbzep
I gave you the weights and the thrust. You can convert to weight on earth to mass quite easily.
We need more "polymer people" on here (there's even a fellow named "Propane" who does radio spots promoting that alkane hydrocarbon); "Kapton" made that query to you, but--as far as I know--"Mylar" and "Tedlar" are still unrepresented on YORF (as are "Nylon," "Rayon," "Teflon," "Kevlar," etc.)... :-)
__________________
Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see:
http://www.lulu.com/content/paperba...an-form/8075185
http://www.lulu.com/product/cd/what...of-2%29/6122050
http://www.lulu.com/product/cd/what...of-2%29/6126511
All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com.
NAR #54895 SR
Reply With Quote
  #16  
Old 01-26-2018, 11:32 PM
luke strawwalker's Avatar
luke strawwalker luke strawwalker is offline
BAR
 
Join Date: Dec 2007
Location: Needville and Shiner, TX
Posts: 5,784
Default

Quote:
Originally Posted by Royatl
Apollo Saturn V was actually 7.6 / 6.2 m lbs at liftoff for a 1.22 T/W ratio.


See what happens when you quote someone else... LOL OL J R
__________________
The X-87B Cruise Basselope-- THE Ultimate Weapon in the arsenal of Homeland Security and only $52 million per round!
Reply With Quote
  #17  
Old 01-27-2018, 09:46 AM
tbzep's Avatar
tbzep tbzep is offline
Dazed and Confused
 
Join Date: Mar 2005
Location: TN
Posts: 8,396
Default

Quote:
Originally Posted by luke strawwalker
See what happens when you quote someone else... LOL OL J R

It's just being lazy and using wiki...
At least it got more people to post on this thread than all the other threads combined in a week's time.
__________________
I love sanding.
Reply With Quote
  #18  
Old 01-27-2018, 11:06 PM
luke strawwalker's Avatar
luke strawwalker luke strawwalker is offline
BAR
 
Join Date: Dec 2007
Location: Needville and Shiner, TX
Posts: 5,784
Default

Quote:
Originally Posted by tbzep
It's just being lazy and using wiki...
At least it got more people to post on this thread than all the other threads combined in a week's time.


True... I almost blamed wiki myself since I cheated and looked the other stuff up on there as well, but I saw I quoted you and figured I'd blame you instead...

Later! OL J R
__________________
The X-87B Cruise Basselope-- THE Ultimate Weapon in the arsenal of Homeland Security and only $52 million per round!
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump



All times are GMT -5. The time now is 06:05 AM.


Powered by: vBulletin Version 3.0.7
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Ye Olde Rocket Shoppe 1998-2018