Ascent Stage Dry Mass Calculation Sheet Version 1.0
Name Weight X Station Y of CG Z of CG
(lb) (ft) (ft) (ft)
Ascent Structure 582.00 15.00 0.00 0.00
Main Engines 68.00 17.00 0.00 0.00
Total Fixed Mass 650.00 15.21 0.00 0.00
Moon Rocks 200.00 10.00 0.00 0.00
Astronauts 750.00 10.00 0.00 0.00
Total Removable Mass 950.00 10.00 0.00 0.00
Ascent Stage Total 1600.00 12.12 0.00 0.00
This is the initial release of the Ascent Stage Mass Properties sheet.
It has been put together to serve primarily as a seed for my spreadsheet.
As such, all values contained in this sheet are to be treated as
extremely preliminary. Unless otherwise noted, consider all
quantities to have a very high degree of uncertainty. Please see the
Ascent Stage Mass Properties
Coordinate System page for a description of
the coordinate system in which the Centers of Gravity and Moments of
Inertia are represented.
- Weights: The Ascent Stage has two classes of dry weight (or
mass). The Fixed Mass includes things such as the structure, avionics,
and engines. The engine mass is based upon using three Kaiser Marquardt
R-40A engines. The rest of the mass was added to make the total agree
with previously published data. The Removable Mass includes the
astronauts and their spacesuits and any lunar samples to be returned to
Earth, and is pretty well known. As the EVA backpacks are left on the
moon, their mass is not included.
- X CG location: The X coordinate of each component's center
of gravity has been based upon a crude estimate of where the geometric
center of each component will be located. The Ascent Stage total makes
use of each of these locations.
- Y and Z CG location: The Ascent Stage has been assumed to
be radially symmetric. Consequently, the Y and Z coordinates of all
center of gravity locations are zero.
- Moments of Inertia: No moments of inertia have been
Planned enhancements to this page include:
Copyright © 2007 Artemis Society International, for the
contributors. All rights reserved.
- Increased and improved component weight definition
- Increased and improved component CG location definition
- Increased and improved component moment of inertia definition
- Addition of moments and cross products of inertia
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John M. Kruep.
ASI Web Team
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Updated Sun, Aug 1, 1999.