Subject:
|
Re: Wings [was: Re: Building big]
|
Newsgroups:
|
lugnet.space, lugnet.loc.au
|
Date:
|
Tue, 19 Jun 2001 21:48:04 GMT
|
Viewed:
|
7240 times
|
| |
|
|
"Jesse Alan Long" <joyous4god2@yahoo.com> writes:
> Dave, you are correct in observing a small mistake concerning the rockets.
> There were parachutes that helped the rockets land in the ocean but even so,
> in a unique way, the parachute acted not only with but against the retro
> rockets because air is required to help an object to land safely on the
> ground or, in this instance, the ocean. The parachute helped the retro
> rockets not burn as much fuel and withstand as much gravitational friction
> as they would if there was not a parachute on the rocket.
There are no retro rockets used in an Apollo re-entry to Earth. Only
the heat of friction and the parachutes slow the ship down from
orbital speeds to the slow speed required for a safe splashdown.
> The comment about
> the total lack of gravity in a laboratory is that a special type of room has
> to be built in order to not contain any gravity and, at least from the
> perspective of this era, any facility that contains such a quality would
> probably be used for some type of space research lab or a test area by a
> space organization. The answer to your question, which was a response to a
> question, is that if these objects are able to move through space, then they
> must be moved by some sort of either controlled or internal gravity inside
> their mass.
If there was such a laboratory it would be quite a boon to NASA.
Unfortunately the current theories of physics state that it would be
impossible to create such a room.
To simulate lack of gravity, there are two techniques used. Both of
these are used by NASA as part of their astronaut training program:
1. Put astronauts in a big swimming pool, wearing their spacesuits.
The buoyancy in the water acts against gravity so that the effect is
somewhat similar to zero-G.
2. Fly in the "vomit comet" - an airplane that goes very high up
into the atmosphere, and then dives straight down, so that the
occupants experience free-fall. This can only continue for about 30
seconds, because otherwise the plane would crash. They then climb
back up and repeat the cycle several times.
--Bill.
--
William R Ward bill@wards.net http://www.wards.net/~bill/
(formerly known as hermit@bayview.com)
-----------------------------------------------------------------------------
Life is too important to take seriously.
|
|
Message has 2 Replies:
 | | Re: Wings [was: Re: Building big]
|
| (...) [snip] (...) <Chuckle> Well, this is close, but not entirely correct :] The airplane goes into a climb, and then in one fluid motion levels and enters a dive. It's during the arced portion of the flight that the occupants experience zero-G. (...) (23 years ago, 20-Jun-01, to lugnet.space, lugnet.loc.au)
| | | Re: Wings [was: Re: Building big]
|
| (...) I think I was possibly referring to the "vomit comet" when I was talking about the laboratory, Bill. I do appreciate the fact that you made me consider an attempt on weightlessness I never thought of in my mind when you mentioned the swimming (...) (23 years ago, 21-Jun-01, to lugnet.space, lugnet.loc.au)
|
Message is in Reply To:
| | Re: Wings [was: Re: Building big]
|
| (...) Dave, you are correct in observing a small mistake concerning the rockets. There were parachutes that helped the rockets land in the ocean but even so, in a unique way, the parachute acted not only with but against the retro rockets because (...) (23 years ago, 19-Jun-01, to lugnet.space, lugnet.loc.au)
|
195 Messages in This Thread:
(Inline display suppressed due to large size. Click Dots below to view.)
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
This Message and its Replies on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
