Re: NASA Encounters Problems With Ares 1 Launch Vehicle Design
- From: "Brad Guth" <bradguth@xxxxxxxxx>
- Date: Wed, 15 Nov 2006 00:51:27 +0000 (UTC)
From: Rusty
According to discussions on Nasaspaceflight.com the Ares 1 is--The CEV will have to use its Service Module engine as a 3rd stage.
in trouble:
The CEV service module will have to add 1000fps to achieve orbital
velocity on a mission to the ISS.
--The Ares 1 payload weight is down to 22 m-tons.
I believe that actually sounds about right, though perhaps minus another
couple of metric tonnes for incorporating their final safety features
and/or of fuel reserves and you're down to perhaps a working 21 if not a
wussy 20 tonne payload for merely achieving ISS, which is essentially
about what I'd said a good year ago.
"rocket/payload ratio of 42:1"
Of course, silly me, this only makes some of us village idiots wonder as
to how the heck that nearly 30% inert mass of the Saturn 5 managed
getting nearly 50t into orbiting the moon, and so quickly within a 60:1
rocket/payload ratio, as well as having extra payload and/or fuel to
burn none the less.
Ares-I Rocket concept started itself out at deploying 25 tonnes into
LEO/ISS with supposedly a safety margin of fuel to spare. Now it's down
to 22 tonnes and they're not even close to a solid prototype with any
proven certainty (they can't even specify as to it's final GLOW or of
whatever's inert mass, much less along with incorporating a good LES
configuration should all hell bust lose.
Perhaps they can utilize their LES itself as a third stage puller rather
than having to pack along an extra kicker.
Supposedly they're stuck within a 900t or somewhat less of a GLOW
window, as representing a somewhat pesky situation that may require a
little something extra in the way of their having to utilize spendy
composites and/or ductaping a couple of extra SRBs on for good measure.
Too bad they're still not smart enough to be using LRBs of h2o2/c3h4o or
perhaps better yet h2o2/Al instead of those somewhat inefficient SRBs.
Where the heck are those smart Jewish Third Reich rocket scientists when
you need them?
-
Brad Guth
--
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