calcHMCa.Rd
Calculate incremental hull (roughness) resistance coefficient
(Ca
) (dimensionless), which describes the effect of hull roughness and
still-air resistance, using the Holtrop & Mennen method.
calcHMCa(maxDraft, lwl, Cbw, breadth, forwardDraft, Abt, hb)
maxDraft | Maximum summer load line draft (vector of numericals, m) |
---|---|
lwl | Waterline length (vector of numericals, m) (see |
Cbw | Waterline block coefficient (vector of numericals, dimensionless)
(see |
breadth | Moulded breadth (vector of numericals, m) |
forwardDraft | Forward draft (deviation from actual draft indicates trim) (vector of numericals, m) |
Abt | Traverse bulb area (vector of numericals, m^2) (see
|
hb | Center of bulb area above keel line (vector of numericals, m) (see
|
Ca
(vector of numericals, dimensionless)
Holtrop, J. and Mennen, G. G. J. 1982. "An approximate power prediction method." International Shipbuilding Progress 29.
Other Holtrop-Mennen Calculations:
calcHMAppendageRes()
,
calcHMBulbousBowRes()
,
calcHMFormFactor()
,
calcHMImmersedTransomRes()
,
calcHMPwr()
,
calcHMThrustFactor()
,
calcHMTotalRes()
,
calcHMWakeFraction()
,
calcHMWaveMakingRes()
,
calcHMWettedSA()
Other Resistance Calculations:
calcCf()
,
calcHMAppendageRes()
,
calcHMBulbousBowRes()
,
calcHMImmersedTransomRes()
,
calcHMTotalRes()
,
calcHMWaveMakingRes()
,
calcKristCaa()
,
calcKristCa()
,
calcKristCr()
,
calcKristTotalRes()
calcHMCa(c(13.57,11.49),c(218.7500,209.2518),c(0.81,0.65),c(32.25,32.20),c(13.57,11.49), c(25.09,55.86),c(5.43,4.6))#> [1] 0.0003356088 0.0003471836calcHMCa(13.57,218.7500,0.81,32.25,13.57,25.0880,5.428)#> [1] 0.0003356088