Apollo/Saturn V question

I read somewhere, that the Saturn V was powerful enough to reach orbit
with only four engines, running at 100%. But they added an extra engine
and ran all five at 80%, in case an engine failed, they've have an extra
one.

Is this true? And if so, wasn't it called something, like the 80/20
solution or some such?

I'm trying to win a bet, so if anyone knows that would be great.

Is this true? And if so, wasn't it called something, like the 80/20
solution or some such?

I think it even once happened so that one of the engines stopped and the
inertia
guiding system replaced that.

I wonder how they are going to build inertia guiding system to this new
"stick" rocket ?
If it has only one shuttle booster engine it is going to be a difficult
task.

Matti

single engine failure would cause a orbit, and use escape rocket or oms
burn for controlled rentry.

single engines are more reliable and less complex, but lack redundancy
in a emergency.

apollo depended on single engine for return from moon

single engine failure would cause a abort, and use escape rocket or oms

burn for controlled rentry.


single engines are more reliable and less complex, but lack redundancy
in a emergency.


apollo depended on single engine for return from moon

single engine failure would cause a abort, and use escape rocket or oms

burn for controlled rentry.


single engines are more reliable and less complex, but lack redundancy
in a emergency.


apollo depended on single engine for return from moon

"Matti Lehtiniemi" wrote in message
...
Is this true? And if so, wasn't it called something, like the 80/20
solution or some such?

I think it even once happened so that one of the engines stopped and the
inertia
guiding system replaced that.

I wonder how they are going to build inertia guiding system to this new
"stick" rocket ?
If it has only one shuttle booster engine it is going to be a difficult
task.


Why?

"Matti Lehtiniemi" wrote in
:

I wonder how they are going to build inertia guiding system to this new
"stick" rocket ?
If it has only one shuttle booster engine it is going to be a difficult
task.

No, it will be either "easy" (if roll thrusters are added, as is done on
other single-engine rockets), or "impossible" (if no roll thrusters are
added). There is no "difficult" in-between. As a wise Jedi master once
said, "Do, or do not. There is no try." :-)

--
JRF

Reply-to address spam-proofed - to reply by E-mail,
check "Organization" (I am not assimilated) and
think one step ahead of IBM.

"Brandons of mass destruction" wrote:

I read somewhere, that the Saturn V was powerful enough to reach orbit
with only four engines, running at 100%. But they added an extra engine
and ran all five at 80%, in case an engine failed, they've have an extra
one.

Saturn needed eleven engines to reach orbit. The S-1C and S-II stages both
had five engines and could cope with the loss of a single engine and still
maintain sufficient velocity to allow the upper stages to take the payload
into orbit.

Is this true? And if so, wasn't it called something, like the 80/20
solution or some such?

The Saturn C-1 & Saturn V were designed with five F-1 first stage engines
from a very early stage of the program - 1961 (or earlier). It's not
impossible that design studies looked at different numbers of engines
in the late 1950s. The scenario you suggest isn't impossible but it's not
recorded in any Saturn history I've seen.

I'm trying to win a bet, so if anyone knows that would be great.

I think you lose.

--

Brian Lawrence

Wantage, Oxfordshire, UK

single engine failure would cause a abort, and use escape rocket or oms

burn for controlled rentry.

Hi!

Didn't apollo 13 have a center engine shut-down on the first stage late in
the burn, but continued on four engines?
(think i remember this from the apollo 13 movie, and with Jim Lovell
confirming it on the audio-commentary track of the movie?

Regards, Erik

"Erik Gunnes" writes:
Didn't apollo 13 have a center engine shut-down on the first stage late in
the burn, but continued on four engines?

Close. The center engine on the second stage had an early shutdown
(thought to be a result of pogo).

--
Richard W Kaszeta

http://www.kaszeta.org/rich