Amazon Ad

Thursday, October 14, 2004

Output from my program for the Queen Elizabeth class

This is still incomplete (due to the secondary battery), but is getting better. I have been extending and tweaking the program to get the weights correct, and then to adjust the metacentric height calculations. The armor and armament center of gravity calculations are really quite good, as you can compute something close to actual weights, and can estimate the CG of pieces quite well. This is an excerpt from the output. The metacentric height is still on the low side, compared to the real ship:
Specification filename: GBBB1912ShipSpec.txt

Designed draft=27.0885 ft

Hull Weight=8896.92 tons
Armament Weight= 4173.59
Total Armor Weight=8559.14
Machinery Weight=3947.37
General Equipment Weight=810.0
Normal Fuel Weight=810.0
Reserve Feedwater Weight=546.75

Legend Displacement=27887.0

Legend Draft=27.9784

Submergence of 1177.65 of actual displacement per foot

At Displacement=27887.0

Length=639.0
Beam=90.5
Draft=27.9784
Cp=0.635
Cm=0.95
Cb=0.60325

At Displacement=27887.0
DLR=106.881
Wetted Surface=67541.6
B/H=3.23463

At speed of 10knots power  is 2755.54 SHP
At speed of 11knots power  is 3617.84 SHP
At speed of 12knots power  is 4631.78 SHP
At speed of 13knots power  is 5913.31 SHP
At speed of 14knots power  is 7577.03 SHP
At speed of 15knots power  is 9462.83 SHP
At speed of 16knots power  is 11596.3 SHP
At speed of 17knots power  is 13971.9 SHP
At speed of 18knots power  is 16622.4 SHP
At speed of 19knots power  is 19692.1 SHP
At speed of 20knots power  is 26705.0 SHP
At speed of 21knots power  is 34398.0 SHP
At speed of 22knots power  is 42760.0 SHP
At speed of 23knots power  is 51837.1 SHP
At speed of 24knots power  is 61601.3 SHP
At speed of 25knots power  is 72109.5 SHP
At speed of 26knots power  is 88870.7 SHP

actual speed for 75000.0 SHP  is 25.1725

Deep Load Displacement=30458.8

Deep Load Draft=29.9594

Submergence of 1193.43 of actual displacement per foot

At Displacement=30458.8
Length=639.0
Beam=90.5
Draft=29.9572
Cp=0.644525
Cm=0.95475
Cb=0.61536
Hull Weight=8896.92 tons

At Displacement=30458.8
DLR=116.737
Wetted Surface=70587.3
B/H=3.02097

At speed of 10knots power  is 2912.55 SHP
At speed of 11knots power  is 3824.2 SHP
At speed of 12knots power  is 4895.63 SHP
At speed of 13knots power  is 6245.72 SHP
At speed of 14knots power  is 7991.76 SHP
At speed of 15knots power  is 9970.22 SHP
At speed of 16knots power  is 12207.9 SHP
At speed of 17knots power  is 14698.8 SHP
At speed of 18knots power  is 17477.5 SHP
At speed of 19knots power  is 20729.4 SHP
At speed of 20knots power  is 28960.3 SHP
At speed of 21knots power  is 37991.4 SHP
At speed of 22knots power  is 47811.2 SHP
At speed of 23knots power  is 58467.6 SHP
At speed of 24knots power  is 69931.5 SHP
At speed of 25knots power  is 82262.5 SHP

actual speed for 75000.0 SHP  is 24.411

Waterline Coeff=0.717182
Block Coefficient=0.60325

Stability Coeff (nu)=0.606506
Height of CG as a fraction of the depth=0.606506
Freeboard=26.7716
Draft=27.9784
Beam=90.5

Metacentric height at legend displacement (GM)=4.09912

Waterline Coeff=0.717182
Block Coefficient=0.60325

Stability Coeff (nu)=0.573974
Height of CG as a fraction of the depth=0.573974
Freeboard=24.7906
Draft=29.9594
Beam=90.5

Metacentric height at deep load displacement (GM)=5.5319

No comments:

Amazon Context Links