Trim & Stability Sheet (English Units)
Description:
This spreadsheet automatically computes
trim, forward draft, after draft, metacentric height and stability margin.
It also computes total weight, all centroids of
total weight and the combined free surface effects of
all tanks for a given vessel operating condition. This
calculative method depends upon Curves of Form input. If the trim
from these calculations exceed 1% of the LBP, the vessel designer is
advised to make additional calculations to get more accurate
results. These additional free to trim equilibrium calculations are
beyond the scope of this spreadsheet, but data from this spreadsheet will
indicate if these special calculations are required.
Electronic
Document Type: Microsoft Excel
spreadsheet Cost:
$25.00 US funds
Number of
Pages: single
sheet
Inputs:
 | The vessel's
Light Ship weight and centroids, vessel length, vessel
condition being evaluated (i. e. departure, arrival, 45% burnout,
etc.) |
| The
following is required for each item on board:
 |
Weights
and centroid information for passengers, crew, dry consumables (provisions
and stores) on board. |
|
Weights
and centroid information for cargo (dry and liquid) on
board. Free surface information is required for the tanks
carrying liquid cargo. |
|
Weights
and centroid information for consumable liquids carried
(fuel, water, etc.). Free
surface information is required for the tanks carrying consumable
liquids. |
|
| After the
above information is entered use the total weight obtained as a basis
for the following data input:
|
Input the
following Curves of Form data: Draft, LCB, LCF, KMt
and KML |
|
Input the Maximum
Allowable KG, or VCG, this is an optional input, but required
if you want to compute the stability Margin |
|
Outputs:
| The total
weight and centroids of the vessel in the condition being
evaluated. This includes all fluid weights present. |
| The total
free surface effect for all the tanks involved. |
| The trim
present, the trim angle, the forward draft, the after
draft, corrections for free surface in KG, the metacentric
height and the stability margin. |
Suggested
Reading:
| naval
architecture or yacht design texts |
|
Hawaii Marine Company Article "Understanding
Trim" |
|
Hawaii Marine Company Article "Understanding
Stability" |
| miscellaneous
science and engineering texts |
| Basic Ship
Theory, by Rawson and Tupper |
| Skene's
Elements of Yacht Design, Kinney |
|
Principles of
Naval Architecture, by SNAME |
Terms:
Prior to purchase, read our End
User License Terms.
Download
Now: Click one of the following buttons to pay. After payment
you will be taken directly to the
download page.
Minimum
System Requirements: Windows 95/98/NT/2000/XP
Sample:
A sample document is shown below.
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