October 7, 20178 yr Thanks for the tests, but tests should always be performed at ISA conditions. You can't simply compare test at ISA +12 and compare them with ISA POH data. Confirm you were at MTOW? At FL100, 8400lbs, 1700RPM and 31.0MP I get: 175ktas 225pph EGT 1022F
October 8, 20178 yr Is there a way to increase prop drag on idle? This could replace the missing prop wash effect and could enhance reality of OEI (one eng inop) behaviour. Drag remains almost same for windmilling or feathered prop, whereas in real life, a windmilling prop costs 400 fpm ROC. Gear down is -350 fpm, flaps 15 is -200 fpm and flaps 45 is -800 fpm as per POH of the C421C, which should be very close to the figures of the C404. Most piston twins have comparable figures for OEI regarding windmilling prop and gear. Flaps on the 404 produce more drag, as stated above. That's why I changed drag in aircraft.cfg for flaps 45 to 1.4 (flaps 15: 1.1). Regarding climb performance: I made quite a couple of more flights, got used to the weird leaning simulation and found climb data to be rather OK if leaned in the way P3D wants it. As full power per book is always full rich and cruise climb is done with FF at the blue triangle, I did that wrong in the sense of P3D and stand corrected in a way that if leaned like the simulator requires (and not a real TSIO engine), climb data is correct. Still, I find beta_max = 60 good for high altitude cruise (simulating what we do in the C421). beta_feather = 65 improves feathering for me at all speeds. In real life, feathering is a rather quick process. Pilot licenses: CPL, IRI, C510, MEP, CRI SEP P3D V5 professional CPU: i9-10900K, GPU: RTX 3090, MB: MSI Z490A PRO, SSD: M.2 Samsung 970 EVO Plus (2 TB) + M.2 (1 TB) , RAM: 32 GB (3600 MHz, CL_16-16-16-36), water cooling: Heatkiller IV Pro + MO-RA3 420 LT, Display: Panasonic 58“ 4K
October 8, 20178 yr Just compared the ROC with the POH values and full flaps reduce the ROC a lot, by 600ft/min and the extended gear another 300ft/min at 109kias That's what i get in FSX as well. Same goes for the GA ROC at 92kias at 850ft/min. Feathered vs windmilling drag is too low but that might be an FSX/P3D restriction.
October 8, 20178 yr 7 hours ago, AndiKunzi said: Is there a way to increase prop drag on idle? This could replace the missing prop wash effect and could enhance reality of OEI (one eng inop) behaviour. Drag remains almost same for windmilling or feathered prop, whereas in real life, a windmilling prop costs 400 fpm ROC. Gear down is -350 fpm, flaps 15 is -200 fpm and flaps 45 is -800 fpm as per POH of the C421C, which should be very close to the figures of the C404. Most piston twins have comparable figures for OEI regarding windmilling prop and gear. Flaps on the 404 produce more drag, as stated above. That's why I changed drag in aircraft.cfg for flaps 45 to 1.4 (flaps 15: 1.1). Regarding climb performance: I made quite a couple of more flights, got used to the weird leaning simulation and found climb data to be rather OK if leaned in the way P3D wants it. As full power per book is always full rich and cruise climb is done with FF at the blue triangle, I did that wrong in the sense of P3D and stand corrected in a way that if leaned like the simulator requires (and not a real TSIO engine), climb data is correct. Still, I find beta_max = 60 good for high altitude cruise (simulating what we do in the C421). beta_feather = 65 improves feathering for me at all speeds. In real life, feathering is a rather quick process. Can you highlight any other aircraft.cfg or .air file modifications you might have? I recently made CHT changes in .air file as recommended from an older post. Thanks / Les Parson
October 8, 20178 yr On 10/6/2017 at 11:39 PM, J35OE said: Thanks for the tests, but tests should always be performed at ISA conditions. You can't simply compare test at ISA +12 and compare them with ISA POH data. Confirm you were at MTOW? At FL100, 8400lbs, 1700RPM and 31.0MP I get: 175ktas 225pph EGT 1022F You're right. We did analysis this way in the airline world with real time variables in ISA and especially wind for seasonal block adjustments. This environment is of course much different.
October 14, 20178 yr Andi, How do these actual numbers sound (P3DV4): A 14000 / FL140 MP: 31 RPM: 1700 FF TOTAL/LB/HR: 220 EGT: 1396F CHT: 266F KIAS: 144 TAS: 184
October 14, 20178 yr Very good, except for EGT and CHT, which is probably due to the weird leaning mechanism in FSX / P3D. If leaning to book values at 55 to 65 %, this will be about 50 dF ROP (rich of peak), which means about 1600 dF TIT / EGT. The GTSIO-520 run really cool, because of their excellent cooling design, even without cowl flaps. You'll see about 340 dF in cruise at about 62 % and leaning per AFM / POH. On fuel injected engines, (almost) no adjustments have to be made with altitude changes. In the meanwhile, I adjusted the main variables to match our C421C as closely as possible, starting with wing area. This is useful for emergency training and decission making scenarios at different loadings and for having comparable IAS to our bird at various power settings. Stall speeds and performance figures are close enough now for me to have a good simulation until Alabeo comes out with their C421. Thus, I'm not using the original C404 anymore. Still missing the OAT gauge. Autopilot is a small little window now docked to the upper right corner. If somebody is interested, I can post the aircraft.cfg here. Pilot licenses: CPL, IRI, C510, MEP, CRI SEP P3D V5 professional CPU: i9-10900K, GPU: RTX 3090, MB: MSI Z490A PRO, SSD: M.2 Samsung 970 EVO Plus (2 TB) + M.2 (1 TB) , RAM: 32 GB (3600 MHz, CL_16-16-16-36), water cooling: Heatkiller IV Pro + MO-RA3 420 LT, Display: Panasonic 58“ 4K
October 15, 20178 yr 3 hours ago, AndiKunzi said: Very good, except for EGT and CHT, which is probably due to the weird leaning mechanism in FSX / P3D. If leaning to book values at 55 to 65 %, this will be about 50 dF ROP (rich of peak), which means about 1600 dF TIT / EGT. The GTSIO-520 run really cool, because of their excellent cooling design, even without cowl flaps. You'll see about 340 dF in cruise at about 62 % and leaning per AFM / POH. On fuel injected engines, (almost) no adjustments have to be made with altitude changes. In the meanwhile, I adjusted the main variables to match our C421C as closely as possible, starting with wing area. This is useful for emergency training and decission making scenarios at different loadings and for having comparable IAS to our bird at various power settings. Stall speeds and performance figures are close enough now for me to have a good simulation until Alabeo comes out with their C421. Thus, I'm not using the original C404 anymore. Still missing the OAT gauge. Autopilot is a small little window now docked to the upper right corner. If somebody is interested, I can post the aircraft.cfg here. I'm definitely interested in anything you're able to post. I'm using the C404 in anticipation of the C421C release but that could be months away. On a separate point, I did adjust the fuel scaler in aircraft.cfg to boost fuel flow, however, I realize issues are more involved and complex. Again, anything and everything you can post will be much appreciated. Thanks / Les Parson
October 15, 20178 yr As for a first model of something that behaves Close to our C421C, I did the following: aircraft.cfg: [General] atc_type=cessna atc_model=C421 editable=0 performance=Maximum Speed\t\n232 kts\t 267 mph\t 430 kmh\n\nCruise Speed\t\n222 kts\t 255 mph\t 411 kmh\n\nEngine\t\nGTSIO-520-L\t375hp\n\nPropeller\t\n3 blades McCauley\n\nMaximum Range\t\n1100 NM\t1266 sm\t2037 km\n\nService Ceiling\t\n30200 ft\t\t9205 m\n\nFuel Capacity\t\n206 U.S. gal\t779 L\n\nEmpty Weight\t\n5158 lb\t2341 kg\n\nMaximum Ramp Mass\t\n7500 lb\t3405 kg\n\nUseful Load\t\n2342 lb\t1063 kg\n\nLength\t\n39,52 ft\t12,04 m\n\nWingspan\t\n41.1 ft\t12,53 m\n\nHeight\t\n11.45 ft\t3.49 m\n\nSeating\t\n8 Category = airplane [weight_and_balance] max_gross_weight = 7500 empty_weight = 5158 reference_datum_position = 0, 0, 0 empty_weight_CG_position = 1, 0, 0 empty_weight_pitch_MOI = 10000 empty_weight_roll_MOI = 12000 empty_weight_yaw_MOI = 13000 empty_weight_coupled_MOI = 0 max_number_of_stations = 16 station_load.0 = 170, 2, 0, 0 station_load.1 = 170, 2, 0, 0 station_load.2 = 170, 1, 0, 0 station_load.3 = 170, 1, 0, 0 station_load.4 = 0, 0, 0, 0 station_load.5 = 0, 0, 0, 0 station_load.6 = 170, -1, 0, 0 station_load.7 = 170, -1, 0, 0 station_load.8 = 0, -2, 0, 0 station_load.9 = 0, -2, 0, 0 station_load.10= 0, 5, 0, 0 station_load.11= 0, 4, 0, 0 station_load.12= 0, 0, -3, 0 station_load.13= 0, 0, 3, 0 station_load.14= 0, -3, 0, 0 station_load.15= 0, -4, 0, 0 [flight_tuning] cruise_lift_scalar =1.0 pitch_stability =1.0 roll_stability =1.0 yaw_stability =1.0 parasite_drag_scalar =0.79 induced_drag_scalar =1.15 elevator_effectiveness =1.0 aileron_effectiveness =1.0 rudder_effectiveness =1.0 elevator_trim_effectiveness =1.0 aileron_trim_effectiveness =1.0 rudder_trim_effectiveness =1.0 hi_alpha_on_yaw = 1.0 p_factor_on_yaw = 0.5 torque_on_roll = 0.5 gyro_precession_on_yaw = 0.5 gyro_precession_on_pitch = 0.5 gyro_precession_on_roll = 0.5 [GeneralEngineData] engine_type = 0 fuel_flow_scalar = 1.0 engine.0 = 7, -7, 0 engine.1 = 7, 7, 0 min_throttle_limit= 0 [piston_engine] power_scalar = 1 //Piston power scalar cylinder_displacement= 90 //Cubic inches per cylinder compression_ratio= 7.5 //Compression ratio number_of_cylinders= 6 //Number of cylinders max_rated_rpm= 2235 //Max rated RPM max_rated_hp= 375 //Max rated HP fuel_metering_type= 0 //0=Fuel Injected, 1=Gravity Carburetor, 2=Aerobatic Carburetor cooling_type= 0 //0=Cooling type Air, 1=Cooling type Liquid normalized_starter_torque= 0.2 //Starter torque factor turbocharged= 1 //Is it turbocharged? 0=FALSE, 1=TRUE max_design_mp= 39 //Max design manifold pressure, (inHg) min_design_mp= 1 //Min design manifold pressure, (inHg) critical_altitude= 25000 //Altitude to which the turbocharger will provide max design manifold pressure (feet) emergency_boost_type= 0 //0=None, 1=Water Injection, 2=Methanol/Water injection, 3=War Emergency Power emergency_boost_mp_offset= 0 //Additional manifold pressure supplied by emergency boost emergency_boost_gain_offset= 0 //Multiplier on manifold pressure due to emergency boost fuel_air_auto_mixture= 0 //Automixture available? 0=FALSE, 1=TRUE auto_ignition= 0 //Auto-Ignition available? 0=FALSE, 1=TRUE max_rpm_mechanical_efficiency_scalar= 1 //Scalar on maximum RPM mechanical efficiency idle_rpm_mechanical_efficiency_scalar= 1 //Scalar on idle RPM mechanical efficiency max_rpm_friction_scalar= 1 //Scalar on maximum RPM friction idle_rpm_friction_scalar= 1 //Scalar on idle RPM friction [propeller] thrust_scalar = 1 //Propeller thrust scalar propeller_type = 0 //0=Constant Speed, 1=Fixed Pitch propeller_diameter = 6.7 propeller_blades = 3 //Number of propeller blades propeller_moi = 15 //Propeller moment of inertia beta_max = 60 //Maximum blade pitch angle for constant speed prop, (degrees) beta_min = 5 //Minimum blade pitch angle for constant speed prop, (degrees) min_gov_rpm = 1100 //Miminum governed RPM prop_tc = 0.03 //Prop time-constant 0.004 gear_reduction_ratio = 1.0 //Propeller gear reduction ratio 17.4 fixed_pitch_beta = 0 //Fixed pitch angle of fixed pitch prop, (degrees) low_speed_theory_limit = 80 //Speed at which low speed theory becomes blended in (feet/second) prop_sync_available = 1 //Prop synchronization available? 0=FALSE, 1=TRUE prop_deice_available = 1 //Prop de-icing available? 0=FALSE, 1=TRUE prop_feathering_available= 1 //Prop feathering available? 0=FALSE, 1=TRUE prop_auto_feathering_available= 0 //Prop auto-feathering available? 0=FALSE, 1=TRUE min_rpm_for_feather = 500 //Minimum RPM for prop feathering beta_feather = 65 //Feathering pitch angle (degrees) power_absorbed_cf = 0 //Coefficient of friction for power absorbed by propeller defeathering_accumulators_available= 0 //Defeathering accumulators available? 0=FALSE, 1=TRUE prop_reverse_available = 0 //Prop reverse available? 0=FALSE, 1=TRUE minimum_on_ground_beta = 0 //Miminum pitch angle on ground, (degrees) 12 minimum_reverse_beta = 0 //Minimum pitch angle in reverse, (degrees) -10 C90 [Flaps.0] type = 1 span-outboard = 0.6 extending-time = 15 system_type = 0 flaps-position.0 = 0 flaps-position.1 = 25 flaps-position.2 = 35 damaging-speed = 190 blowout-speed = 199 lift_scalar = 0.7 drag_scalar = 1.15 pitch_scalar = 0 [Flaps.1] type = 1 span-outboard = 0.6 extending-time = 1 system_type = 0 flaps-position.0 = 0 flaps-position.1 = 0 flaps-position.2 = 35 damaging-speed = 190 blowout-speed = 199 lift_scalar = 0.0 drag_scalar = 1.7 pitch_scalar = 0 [vacuum_system] max_pressure=5.0 vacuum_type=1 electric_backup_pressure=4.5 engine_map=1,1,0,0 [airplane_geometry] wing_area = 214 wing_span = 41 wing_root_chord = 7 wing_dihedral = 4 wing_incidence = 2 wing_twist = 3 oswald_efficiency_factor = 1 wing_winglets_flag = 0 wing_sweep = 0 wing_pos_apex_lon = 1 wing_pos_apex_vert = -1 htail_area = 32 htail_span = 19 htail_pos_lon = -24 htail_pos_vert = 1 htail_incidence = 0 htail_sweep = 0 vtail_area = 22 vtail_span = 9 vtail_sweep = 40 vtail_pos_lon = -21 vtail_pos_vert = 5 elevator_area = 18 aileron_area = 12 rudder_area = 18 elevator_up_limit = 25 elevator_down_limit = 14 aileron_up_limit = 25 aileron_down_limit = 15 rudder_limit = 32 elevator_trim_limit = 30 spoiler_limit = 0 aileron_to_spoileron_gain = 0 min_ailerons_for_spoilerons = 0 min_flaps_for_spoilerons = 0 spoilerons_available = 0 auto_spoiler_available= 0 spoiler_extension_time= 0 positive_g_limit_flaps_up= 5.4 positive_g_limit_flaps_down= 3.0 negative_g_limit_flaps_up= -1.5 negative_g_limit_flaps_down= -1.5 [Reference Speeds] flaps_up_stall_speed= 86 full_flaps_stall_speed= 77 cruise_speed= 151 max_indicated_speed= 255 Panel.cfg: [Window00] Background_color=0,0,0 size_mm=573,286 window_size_ratio=1.000 position=0 visible=1 ident=0 window_size= 0.060, 0.053 window_pos= 0.940, 0.005 gauge00=PAC404AP!Autopilot, 0, 0,573,286 That gives me a nice Little A/P in the right upper Corner of my 58 inches 4k Screen. Additionally, I set the Buttons under my 2 mixture Control Levers at my Saitek Quadrant to engine 1 off and engine 2 off. Elev Trim on A1 / A2, Rudder Trim for OEI on C1 / C2. Pilot licenses: CPL, IRI, C510, MEP, CRI SEP P3D V5 professional CPU: i9-10900K, GPU: RTX 3090, MB: MSI Z490A PRO, SSD: M.2 Samsung 970 EVO Plus (2 TB) + M.2 (1 TB) , RAM: 32 GB (3600 MHz, CL_16-16-16-36), water cooling: Heatkiller IV Pro + MO-RA3 420 LT, Display: Panasonic 58“ 4K
December 23, 20178 yr Hello guys, I am crazy about finding the Titan C404 POH, but I was not able to find anywhere on the Internet. Can any of you send it to me? Felipe Bachian I7 [email protected] / ASUS ATX Maximus VII Ranger / 32GB (4x8) 1866Mhz DDR3 Corsair Vengeance / EVGA GTX 1070 6Gb / 2x 480Gb SSD Honneycomb Alpha Yoke + CH Throttle Quadrant + Saitek Multi Panel + CH Pro Pedals + Logitech Extreme 3D Pro
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