Bounceing Tomtit

hurricane3

SOH-CM-2023
Now if that isn't a title for smart remarks ,I don't know what is. Anyway the military version of the Tomtit trainer from Britfiles bounce's all over on the ground. This was supposed to be fixed in version 2 but it's not. I did see in the download for the military version thats not it the civil version an extra file called "tomtit trainer.iit" .Is this supposed to stop the bounceing? If it is where does it go? I put it in the model file cause I didn't know where else to put it, but it makes no difference.
The cival version is steady as a rock on the ground.
 
Hi,

//iss; 09033015000 v0.5, for 'tmttbv021.zip': Pitch moi. changed from 842.61 to 1842.61 which stops the tail falling through the ground.

Try this ....


[General]
atc_type=Hawker
atc_model=Tomtit
editable=1
performance="Maximum Speed : 124 mph. 108 kts.\nEngine : 150-hp AS Mongoose IIIC.\nService Ceiling : 19,500 ft \nFuel Capacity : 51 gal. \nEmpty Weight : 1,100 lb \nMaximum Gross Weight : 1,750 lb \nLength : 23 ft, 9 in \nWingspan : 28 ft, 6 in \nHeight : 8 ft, 4 in. "
category=airplane

[WEIGHT_AND_BALANCE]
max_gross_weight =1750.0
empty_weight =1100.0

reference_datum_position = 0, 0, 0 // (feet) from FSim Ref. position: (1/4 chord, centerline)
empty_weight_CG_position = -1.5, 0.0, 0.0

max_number_of_stations =2

;Moments of Inertia
empty_weight_pitch_MOI = 1842.61
empty_weight_roll_MOI = 477.79
empty_weight_yaw_MOI = 1072.52
empty_weight_coupled_MOI =0.0
station_load.0= 170, -4.0, 0.0, -0.5, P1
station_load.1= 0, -0.5, 0.0, -0.5, P2

[flight_tuning]
cruise_lift_scalar =1.0
parasite_drag_scalar =1.0
induced_drag_scalar =1.0
elevator_effectiveness =1.0
aileron_effectiveness =1.0
rudder_effectiveness =1.0
pitch_stability =1.0
roll_stability =1.0
yaw_stability =1.0
elevator_trim_effectiveness =0.9
aileron_trim_effectiveness =1.0
rudder_trim_effectiveness =1.0
p_factor_on_yaw = 0.5
hi_alpha_on_roll =1.0
hi_alpha_on_yaw =1.0
torque_on_roll =1.0
gyro_precession_on_roll =1.0
gyro_precession_on_yaw =1.0

[GeneralEngineData]
engine_type =0
Engine.0 =6.22, 0.0, 0.0
fuel_flow_scalar =1.0
min_throttle_limit =0.04
starter_type = 1 // 1 = Manual starter

[piston_engine]
power_scalar =1.0
cylinder_displacement =80.0
compression_ratio =5.4
number_of_cylinders =5
number_of_magnetos = 2
max_rated_rpm =2400
max_rated_hp =150.0
fuel_metering_type =1
cooling_type =0
normalized_starter_torque =0.31667

turbocharged=0
max_design_mp=0
min_design_mp=0
critical_altitude=0.0
emergency_boost_type=0
emergency_boost_mp_offset=0.0
emergency_boost_gain_offset=0.0
emergency_boost_duration=0.0
fuel_air_auto_mixture =0
auto_ignition =0

max_rpm_mechanical_efficiency_scalar=1.0
idle_rpm_mechanical_efficiency_scalar=1.0
max_rpm_friction_scalar=1.0
idle_rpm_friction_scalar=1.0

[propeller] // --{510}--
thrust_scalar =1.0
propeller_type =1
propeller_diameter =7.9
propeller_blades =2
propeller_moi =7.6
gear_reduction_ratio =1.0
fixed_pitch_beta =19.0
low_speed_theory_limit =80.0

beta_max=0
beta_min=0
min_gov_rpm=0.0
prop_tc=0.0
prop_sync_available=0
prop_deice_available=0
prop_feathering_available=0
prop_auto_feathering_available=0
min_rpm_for_feather=0.0
beta_feather=0.0
power_absorbed_cf=0.0
prop_reverse_available=0
minimum_on_ground_beta=0.0
minimum_reverse_beta=0.0
defeathering_accumulators_available=0

[airplane_geometry]
wing_area =269.0
wing_span =28.5
wing_root_chord =4.91
wing_dihedral =2.0
wing_incidence =0.0
wing_twist =0.0
oswald_efficiency_factor =0.9
wing_winglets_flag =0
wing_sweep =0.0
wing_pos_apex_lon =1.49
wing_pos_apex_vert =0.5

htail_area =19.4
htail_span =9.43
htail_pos_lon =-13.94
htail_pos_vert =0.5
htail_incidence =0.0
htail_sweep =0.0

vtail_area =4.0
vtail_span =3.51
vtail_sweep =0.0
vtail_pos_lon =-14.38
vtail_pos_vert =1.5

elevator_area =11.0
aileron_area =35.8
rudder_area =7.55

elevator_up_limit =30.0
elevator_down_limit =20.0
aileron_up_limit =20.0
aileron_down_limit =15.0
rudder_limit =25.0
elevator_trim_limit =19.5
spoiler_limit =0.0

spoilerons_available =0
aileron_to_spoileron_gain =0.0
min_ailerons_for_spoilerons =0.0
min_flaps_for_spoilerons =0.0
spoiler_handle_available=0
auto_spoiler_available=0
positive_g_limit_flaps_up=0
negative_g_limit_flaps_up=0
positive_g_limit_flaps_down=0
negative_g_limit_flaps_down=0
load_safety_factor=1.0

[Reference Speeds]
flaps_up_stall_speed = 35
full_flaps_stall_speed = 35
cruise_speed = 89
max_indicated_speed =108

[Flaps.0]
type=0

[contact_points]
max_number_of_points=8
; Dynamic position.
;..Ref....0.......1.........2.......3.......4.....5....6.....7.....8......9......10....11...12..13
point.0= 3, -14.200, 0.00, -1.73, 1200, 0, 0.0, 50.0, 0.09, 1.63, 0.80, 0.0, 0.0, 0
point.1= 1, 1.082, -2.63, -5.65, 1600, 1, 1.0, 0.0, 0.34, 1.70, 0.80, 0.0, 0.0, 2
point.2= 1, 1.082, 2.63, -5.65, 1600, 2, 1.0, 0.0, 0.34, 1.70, 0.80, 0.0, 0.0, 3
;Scrapes
point.3= 2, 7.270, 0.00, 0.00, 800, 0, 0.0, 0.0, 0.00, 0.00, 0.00, 0.0, 0.0, 4
point.4= 2, -16.600, 0.00, 0.00, 800, 0, 0.0, 0.0, 0.00, 0.00, 0.00, 0.0, 0.0, 9
point.5= 2, -15.700, 0.00, 3.17, 800, 0, 0.0, 0.0, 0.00, 0.00, 0.00, 0.0, 0.0, 9
point.6= 2, 0.000, -14.25, -1.50, 800, 0, 0.0, 0.0, 0.00, 0.00, 0.00, 0.0, 0.0, 5
point.7= 2, 0.000, 14.25, -1.50, 800, 0, 0.0, 0.0, 0.00, 0.00, 0.00, 0.0, 0.0, 6

;Slew position.
static_pitch = 14.0
static_cg_height = 5.17
gear_system_type =4
tailwheel_lock=0

[brakes]
parking_brake =0
toe_brakes_scale =0.0
differential_braking_scale =0.0
auto_brakes=0
hydraulic_system_scalar=0.0

[electrical]
;BusType, MaxAmpLoad, MinVoltage
; BusTypes:0=MainBus,1=AvionicsBus,2=BatteryBus,3=HotBatteryBus,4-7=Generator/AlternatorBus(1-4)
max_battery_voltage =26
generator_alternator_voltage =28.5
max_generator_alternator_amps= 60
light_panel = 0, 1, 6

[Views]
eyepoint= -4, 0.0, 1.6 // (feet) long, lat, vert. distance from reference datum. -4/0/1.6

[LIGHTS]
//Types: 4=cockpit
light.0 = 4, -3.00, 0.00, 1.45, fx_vclight
// just to offset shade in fs9.

[keyboard_response]
//Breakpoint speeds (knots) on the keyboard increments of control surfaces.
//Speed at which the incremenet is reduced to 1/2 and 1/8 respectively.
elevator = 100, 180
aileron = 200, 1000
rudder = 200, 1000

[fuel]
; Left tanks are used to model the Centre tanks on the Tomtit; the Aux tank has no seperate cock.
; The main tank is fed by the Aux. continuously, but the gauge is on the main tank only and so
; shows full until the Aux tank is empty.
LeftMain = 1.1, 0.0, 3.0, 22.0, 0.0
LeftAux = 3.3, 0.0, -1.0, 29.0, 0.0
fuel_type =1
number_of_tank_selectors =1
electric_pump=0
fuel_dump_rate=0.02
anemometer_pump=0
engine_driven_pump=0
manual_pump=0

[Radios] // No radio was fitted; this is the minimum to be able to use ATC in fs9.
// Radio Type = availiable, standby frequency, has glide slope.
Audio.1 = 0
Com.1 = 1, 0
Nav.1 = 0, 0, 0
Adf.1 = 0
Transponder.1 = 1
Marker.1 = 0

[EFFECTS]
wake=fx_wake
water=fx_spray
dirt=fx_tchdrt
concrete=fx_sparks
touchdown=fx_tchdwn_s, 1

[hydraulic_system]
normal_pressure =0.0

[stall_warning]
type=0

[direction_indicators]
//1 Type: 0=None
//2 Indicator number of slaving indicator if Type = 4
direction_indicator.0=0,0

[attitude_indicators]
//Type: 1=Vacuum Gyro
attitude_indicator.0 = 0

[turn_indicators]
//Type: 2= Vacuum Gyro
turn_indicator.0=2,2 // Turn AND Bank

[autopilot]
autopilot_available=0
flight_director_available=0
autothrottle_available=0

[smokesystem]
smoke.0=1

[gear_warning_system]
gear_warning_available=0

[forcefeedback] ; You are on your own here!
gear_bump_nose_magnitude=6000
gear_bump_nose_direction=18000
gear_bump_nose_duration=250000
gear_bump_left_magnitude=6000
gear_bump_left_direction=35500
gear_bump_left_duration=250000
gear_bump_right_magnitude=6000
gear_bump_right_direction=500
gear_bump_right_duration=250000
ground_bumps_magnitude1=3250
ground_bumps_angle1=8900
ground_bumps_intercept1=5
ground_bumps_slope1=0.48
ground_bumps_magnitude2=750
ground_bumps_angle2=9100
ground_bumps_intercept2=0.075
ground_bumps_slope2=1
crash_magnitude1=10000
crash_direction1=1000
crash_magnitude2=10000
crash_direction2=9000
crash_period2=75000
crash_duration2=2500000
stick_shaker_magnitude=5000
stick_shaker_direction=0
stick_shaker_period=111111

[AirWrench]
Aircraft_Length=23.75000
nose_position_lon=6.22000
AirWrenchVersion=1.01.45
 
As a quick answer have a look at the MOI section of each aircraft.cfg file to see if there is any difference.

Just had a quick shuftie and the line in the trainer that says:

empty_weight_pitch_MOI =842.61

is =1842.61 in the civil model.
 
That worked

Yep thanks guys changing the pitch MOI made it as steady as the civil version. Thanks you guys are the best
 
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