Blue Origins, update |
Blue Origins, update |
Jan 4 2007, 02:47 AM
Post
#1
|
|
Member Group: Members Posts: 163 Joined: 16-March 05 From: Oakville, Ontario, Canada Member No.: 201 |
|
|
|
Jan 8 2007, 01:03 PM
Post
#2
|
|
Founder Group: Chairman Posts: 14434 Joined: 8-February 04 Member No.: 1 |
With such high gravity to fight against, and a nice thick atmosphere that's screaming out for chutes, parafoils etc.... landing with rockets on Earth just doesn't make a lot of sense to me.
Doug |
|
|
Jan 8 2007, 02:55 PM
Post
#3
|
|
Member Group: Members Posts: 593 Joined: 20-April 05 Member No.: 279 |
[L]anding with rockets on Earth just doesn't make a lot of sense to me. I agree. Using one of the fresh envelope-backs I got for Christmas, I see that retro-rocket-landing an Apollo CM from the drogue release altitude and speed, for example, would require something like a beefed-up AJ10-137 engine (massing around 4000kg), 31 seconds' thrust (1450 kg of fuel and oxidiser), all crammed into a 5800 kg mass capsule (!!). Naturally the engine would have to poke through the heat shield, which additionally complicates matters. Comparing that to the (original) 245kg parachutes-and-drogues-and-deployment package, it's an absolute no-brainer. <long pause> ...though, in its favour <whispering> it would look rather Heinleinian. Andy |
|
|
Lo-Fi Version | Time is now: 27th September 2024 - 09:44 AM |
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE 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. |