Alebeo C207 upgrade

[Shaun]

Hi guys, so I've just got Fspassengers 2015 and I'm starting from the bottom on career mode. I've chosen the Cessna 207 Skywagon from Alebeo. I'm trying to modify the aircraft into a Stationair 8 by upgrading the engine in the cfg from an IO-520 (285hp@2700rpm) to a TSIO-550 (310hp@2600rpm). I've managed to edit the cylinder displacements, max rpms, compression ratios etc, but I'm not seeing any notable difference with altitude. The ceiling is still stuck at 13,300ft and a cruise at 12,500ft is very slow even on just 70% payload, and a properly leaned mixture. The service ceiling on the turbo model was doubled to 26,000ft however. How do I improve altitude performance? Can I do this in the cfg or would it be in the air file?

[petermcleland]

That is because the TSIO is Turbocharged and your .cfg file does not say this...I will check on Little Bandit's file for the necessary changes and get back to you here.

Here is the engine part of Little Bandit's .cfg file for the Continental TSIO-550-E 350hp

[General}

performance="Maximum Speed\t\n184 kts 212 mph\t340 kmh\n\nCruise Speed\t\n165 kts 190 mph \t306 kmh\n\nEngine\t\nTeldyne ContinentalTSIO-550-E 350 hp\n\nPropeller\t\nThree-bladed McCauley constant speed\n\nMaximum Range\t\n929 nm 1,070 sm \t1,721 km\n\nService Ceiling\t\n18,500 ft 5,639 m\n\nFuel Capacity\t\n104 U.S. gal 556 L \n\nEmpty Weight\t\n2,530 lb \t 1,148 kg\n\nMaximum Gross Weight\t\n3,663 lb \t 1,662 kg\n\nUseful Load\t\n1,063 lb \t 482 kg\n\nLength\t\n27 ft 6 in\t 8.38 m\n\nWingspan\t\n33 ft 6 in\t 10.21 m\n\nHeight\t\n8 ft 11 in\t 2.62 m\n\nSeating\t\nUp to 6"

[piston_engine]
power_scalar=1.11 //adj. for 350 SHP
cylinder_displacement=91.66
compression_ratio=7.5
number_of_cylinders=6
max_rated_rpm=2700
max_rated_hp=350
fuel_metering_type=0
cooling_type=0
normalized_starter_torque=0.02
turbocharged=1
max_design_mp=35.000
min_design_mp=1.000
critical_altitude=18100.000
emergency_boost_type=0
emergency_boost_mp_offset=0
emergency_boost_gain_offset=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

Note the critical_altitude...This is the Altitude at while the Manifold Pressure will start to fall from its Full Throttle at Take-Off figure (max design mp) in this case 35 inches

Here are my propeller figures as well...Where there is a remark marked // the then old number after the // is the old number that has been changed.

[propeller]
thrust_scalar=1.2
propeller_type=0
propeller_diameter=6.83
propeller_blades=3
propeller_moi=3.5
beta_max=45.0 //35.0
beta_min=16.0 //15.0
min_gov_rpm=800
prop_tc=0.0035 //0.002
gear_reduction_ratio=1.0
fixed_pitch_beta=20
low_speed_theory_limit=80
prop_sync_available=0
prop_deice_available=0
prop_feathering_available=1 //0
prop_auto_feathering_available=1 //0
min_rpm_for_feather=700 //0
beta_feather=82.5 //0
power_absorbed_cf=0.9 //0
defeathering_accumulators_available=0
prop_reverse_available=0
minimum_on_ground_beta=15
minimum_reverse_beta=0


You should be able to check from the manufacturers data on your new engine and change the numbers to suit.

[Shaun]

Ah yes, I did have it on Turbocharged=1, however both the min and max manifolds were set to 0. I never changed this so the turbocharger never worked haha! I've changed them to equal that of the Stationair's turbo. After take off my fuel flows basically doubled and I am happily cruising at 17,500ft I will have to steal a manifold pressure gauge from a different aircraft though, as it was off the default gauge's scale (38.8 in Hg).

[petermcleland]

Well done Shaun...Sounds like a very successful engine change