Anders Gidenstam / DATCOM+ / Aeromatic v 0.9 anders at gidenstam dot org 2008-11-05 $Id: Short_S23.xml,v 1.13 2013/09/16 20:39:32 andgi Exp $ Models a Short S.23 flying boat. GPL http://www.gnu.org/licenses/gpl.html This model was created using publicly available data, publicly available technical reports, textbooks, and guesses. It contains no proprietary or restricted data. It has been validated only to the extent that it may seem to "fly right", and possibly to comply to published, publicly known, performance data (maximum speed, endurance, etc.). Thus, this model is meant for educational and entertainment purposes only. This simulation model is not endorsed by the manufacturer. This model is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. The origin of the structural frame is at the nose of the aircraft. The coordinate system is aligned with the hull datum line. "The line of the keel from Frame 10 aft to Frames 20/21 formed the hull datum line." [Cassidy:2004:FE] Cf. also the 3d model coordinate system in the model XML file. 1510.0000 114.0000 16.4583 226.6750 12.2147 319.0423 17.2533 8.68 0.00 2.35 2.05 2.50 0.00 0.00 0.00 0.00 The inertia was estimated by Aeromatic. CG location X-coordinate is based on [Short:RN-3-1-37]. However, the document is not very clear. My assumption is that the datum marker plate is located on the bulkhead of frame 15/16. "C.G. is 4.56ft aft of datum point measured parallel to hull datum." "Datum plate in spar compartment is 19.65 in. aft of datum point measured parallel to hull datum. Permissible CG limits 55.5" to 66.8" aft of datum point measured parallel to hull datum." ([Short:RN-3-1-37]) Based on the drawings the frame 15/16 bulkhead is 8.25 meters behind the origin of the FDM structural frame. Revised datum location based on 1:48 GA drawing: 7.728 meters behind the origin of the FDM structural frame. The resulting permissible range for the CG x coordinate is 359.75in to 371.05in in the structural frame. Empty weight (incl. oil) according to [Cassidy:2004:FE] p.121: 23451 lbs. Tare weight according to [Short:RN-3-1-37]: 27845 lbs (including passenger compartments and some equipment. 251174 180055 426351 27528 9.12 0.00 1.10 Adjustable payload pointmasses located according to [Short:RN-3-1-37]. 85 2.44 -0.5 1.5 85 2.44 0.5 1.5 85 7.0 0.0 0.0 85 5.4 0.0 0.0 85 3.2 -0.5 1.5 0.0 9.3 0.0 1.5 0.0 6.2 0.0 1.5 345.6 19.1 0.0 1.5 0.0 4.2 0.0 -0.5 0.0 9.5 0.0 -1.0 0.0 9.5 0.0 0.0 0.0 12.5 0.0 0.0 0.0 15.9 0.0 0.0 317.0 3.8 0.0 0.0 117.3 7.6 -8.0 2.8 117.3 7.3 -4.0 2.6 117.3 7.3 4.0 2.6 117.3 7.6 8.0 2.8 The hydrostatic interactions of the hull are modelled by external forces. Total bouyancy of Type 2 float is 5000lb. 8.50 -9.75 -0.50 0.0 0.8 0.0 1200.0 1000.0 0 NONE 0 8.50 9.75 -0.50 0.0 0.8 0.0 1200.0 1000.0 0 NONE 0 0.00 0.00 0.00 0.80 0.80 2000.00 1500.00 26.80 0.00 3.20 0.80 0.80 1500.00 1250.00 8.5 -17.4 2.3 0.80 0.80 1000.00 700.00 8.5 17.4 2.3 0.80 0.80 1000.00 700.00 Propeller location from the plans by [Cassidy:2004:FE]. Fuel tank location and capacity according to [Cassidy:2004:FE]. Mainplane incidence to thrust line: 1 deg 52 min. [Short:RN-3-1-37] Mainplane incidence to hull datum line: 3 deg. [Short:RN-3-1-37] 6.80 -7.50 2.90 1.13 0.00 0.00 8 -1 6.30 -7.50 2.90 1.13 0.00 0.00 6.50 -3.98 2.69 1.13 0.00 0.00 9 -1 6.00 -3.98 2.69 1.13 0.00 0.00 6.50 3.98 2.69 1.13 0.00 0.00 10 -1 6.00 3.98 2.69 1.13 0.00 0.00 6.80 7.50 2.90 1.13 0.00 0.00 11 -1 6.30 7.50 2.90 1.13 0.00 0.00 The S.23 'boats as delivered (with a few exceptions) came with one of 3 different fuel system types. [Cassidy:2004:FE] Mk.I (1D) standard: one 326 gallon tank in each wing. Mk.II (1A/1C) Cavalier, Centarus: one 179 and one 326 gallon tank in each wing. Mk.III (1B) Cambria, Caledonia: one 179, one 326 and one 380 gallon tank in each wing. two 280 gallon tanks between the spar frames in the hull. [Cassidy:2004:FE] gives the sizes and capacities of the respective tanks as: Inboard 380 gals. 65.5in. diam., 31.5in. ht. Centre 326 gals. 64in. diam., 28in. ht. Outboard 179 gals. 56.5in. long, 41.75in. wide, 19.5in. ht. Oil tanks where placed in the nacelles aft of the firewall[Cassidy:2004:FE]. Mk.I four 13 1/2 gals. Mk.II four 22 gals. Mk.III eight 18 gals. 9.21 -5.35 2.50 32.0 2356.9 2352.0 6.02 9.21 5.35 2.50 32.0 2356.9 2352.0 6.02 9.21 -6.85 2.55 24.6 1294.1 0.00 6.02 9.21 6.85 2.55 24.6 1294.1 0.00 6.02 9.21 -2.45 2.40 32.75 2747.3 0.00 6.02 9.21 2.45 2.40 32.75 2747.3 0.00 6.02 9.21 -0.72 2.40 34.0 2024.3 0.00 6.02 9.21 0.72 2.40 34.0 2024.3 0.00 6.02 6.80 -7.50 2.90 0.25 0.00 6.02 6.50 -3.98 2.69 0.25 0.00 6.02 6.50 3.98 2.69 0.25 0.00 6.02 6.80 7.50 2.90 0.25 0.00 6.02 The flight control system creates the properties needed by the Aeromatic generated aerodynamic section as well as those needed by the DATCOM+ generated aerodynamic section. Control surface movements according to [Short:RN-3-1-37]: Ailerons : +/-19.5 deg Elevator : +/-18 deg Rudder : +/-22.5 deg fcs/copilot/aileron-cmd-norm fcs/copilot/elevator-cmd-norm fcs/copilot/rudder-cmd-norm sperry-autopilot/aileron-cmd-norm sperry-autopilot/elevator-cmd-norm sperry-autopilot/rudder-cmd-norm fcs/elevator-cmd-norm fcs/copilot/elevator-cmd-norm sperry-autopilot/elevator-cmd-norm fcs/pitch-trim-cmd-norm -1 1 fcs/elevator/cmd-sum-norm -0.3142 0.3142

fcs/elevator-pos-rad

fcs/elevator/pos-rad 57.29578

fcs/elevator-pos-deg

fcs/elevator/pos-rad -0.3142 0.3142 -1 1

fcs/elevator-pos-norm

fcs/aileron-cmd-norm fcs/copilot/aileron-cmd-norm sperry-autopilot/aileron-cmd-norm fcs/roll-trim-cmd-norm -1 1 fcs/aileron/cmd-sum-norm -0.3403 0.3403

fcs/left-aileron-pos-rad

fcs/aileron/left-pos-rad 57.29578

fcs/left-aileron-pos-deg

fcs/aileron/left-pos-rad -0.3403 0.3403 -1 1

fcs/left-aileron-pos-norm

fcs/aileron/cmd-sum-norm -0.3403 0.3403

fcs/right-aileron-pos-rad

fcs/aileron/right-pos-rad 57.29578

fcs/right-aileron-pos-deg

fcs/aileron/right-pos-rad -0.3403 0.3403 -1 1

fcs/right-aileron-pos-norm

fcs/rudder-cmd-norm fcs/copilot/rudder-cmd-norm sperry-autopilot/rudder-cmd-norm fcs/yaw-trim-cmd-norm -1.0 1.0 fcs/rudder/cmd-sum-norm -0.3927 0.3927

fcs/rudder-pos-rad

fcs/rudder/pos-rad 57.29578

fcs/rudder-pos-deg

fcs/rudder/pos-rad -0.393 0.393 -1 1

fcs/rudder-pos-norm

8.68 0.00 0.00 1.0 0.0 0.0 8.68 0.00 0.00 0.0 1.0 0.0 8.68 0.00 0.00 0.0 0.0 -1.0 8.3752 0.00 0.00 0.0 0.0 -1.0 8.9848 0.00 0.00 0.0 0.0 -1.0 8.68 -0.3048 0.00 1.0 0.0 0.0 8.68 0.3048 0.00 1.0 0.0 0.0 8.68 -0.3048 0.00 0.0 0.0 -1.0 8.68 0.3048 0.00 0.0 0.0 -1.0 9.00 -9.75 -0.50 1.0 0.0 0.0 9.00 -9.75 -0.50 0.0 1.0 0.0 9.00 9.75 -0.50 1.0 0.0 0.0 9.00 9.75 -0.50 0.0 1.0 0.0