IPB
X   Site Message
(Message will auto close in 2 seconds)

Welcome Guest ( Log In | Register )

Payload to LEO?
MiniTES
post Nov 10 2006, 06:08 PM
Post #1


Junior Member
**

Group: Members
Posts: 81
Joined: 25-February 05
From: New Jersey
Member No.: 177
Not exactly sure where to put this, but how would I go about calculating the paylad of a given launch vehicle to LEO? I always see people saying things like, "well, this gives you x tons to LEO, add another SRB and you get 2 more" - how do I calculate this? Is there a program I could get hold of?


--------------------
----------------------------------------------
"Too low they build, who build beneath the stars." - Edward Young
Go to the top of the page
 
+Quote Post
 
 Start new topic
Replies
edstrick
post Nov 11 2006, 11:09 AM
Post #2


Senior Member
****

Group: Members
Posts: 1870
Joined: 20-February 05
Member No.: 174
To do an accurate calculation, you need to know the sea-level thrust and specific impulse of first stage engines, second stage vaccuum <more or less> thrust and impulse, third stage etc.. their mass fractions, burn profile, etc etc etc... that's to get a good (maybe 10%) approximation.

The Devil is in the Details.
Go to the top of the page
 
+Quote Post

Posts in this topic
- MiniTES   Payload to LEO?   Nov 10 2006, 06:08 PM
- - djellison   I don't know of a program to work it out - it...   Nov 10 2006, 07:31 PM
|- - MiniTES   QUOTE (djellison @ Nov 10 2006, 07:31 PM)...   Nov 10 2006, 08:04 PM
- - djellison   Well - not a set of calculations...it's just a...   Nov 10 2006, 08:06 PM
- - edstrick   To do an accurate calculation, you need to know th...   Nov 11 2006, 11:09 AM

« Next Oldest · Conferences and Broadcasts · Next Newest »
 

Reply to this topicStart new topic

 

Display Mode: Switch to: Standard · Switch to: Linear+ · Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

RSS Lo-Fi Version Time is now: 16th December 2024 - 08:52 PM
Powered By IP.Board © 2024  IPS, Inc.
RULES AND GUIDELINES
Please read the Forum Rules and Guidelines before posting.

IMAGE COPYRIGHT
Images posted on UnmannedSpaceflight.com may be copyrighted. Do not reproduce without permission. Read here for further information on space images and copyright.

 OPINIONS AND MODERATION
Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators.		 SUPPORT THE FORUM
Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member.