Engine controls (from pictures of the engine control box and other sources) - Throttle levers - Sets auto boost datum. - fcs/throttle-cmd-norm[0|1|2|3] - Mixture levers - Sets auto mixture datum: WEAK - NORMAL - RICH - ... Might have the positions NORMAL - RICH - +1 PSI - +3 PSI The latter two settings are some sort of boost override positions. Here full rich mixture bumps the maximum boost from 2.5 to 4.25 PSI. - fcs/mixture-cmd-norm[0|1|2|3] - Airscrew pitch control levers - Has the positions COARSE and FINE. No feathering was available. - fcs/advance-cmd-norm[0|1|2|3] - Engine cut-out levers - Two levers cutting the fuel to the inner and outer engines, respectively. Has the positions ON and OFF. - fcs/inner-engines-cutoff-cmd-norm - fcs/outer-engines-cutoff-cmd-norm fcs/throttle-cmd-norm[0] fcs/throttle-cmd-norm[1] fcs/throttle-cmd-norm[2] fcs/throttle-cmd-norm[3] fcs/advance-cmd-norm[0] fcs/advance-cmd-norm[1] fcs/advance-cmd-norm[2] fcs/advance-cmd-norm[3] fcs/mixture-cmd-norm[0] fcs/mixture-cmd-norm[1] fcs/mixture-cmd-norm[2] fcs/mixture-cmd-norm[3] fcs/inner-engines-cutoff-cmd-norm fcs/outer-engines-cutoff-cmd-norm fcs/starter-cmd-norm[0] fcs/starter-cmd-norm[1] fcs/starter-cmd-norm[2] fcs/starter-cmd-norm[3] propulsion/engine[0]/starter-serviceable propulsion/engine[1]/starter-serviceable propulsion/engine[2]/starter-serviceable propulsion/engine[3]/starter-serviceable propulsion/engine[0]/fuel-pump-serviceable propulsion/engine[1]/fuel-pump-serviceable propulsion/engine[2]/fuel-pump-serviceable propulsion/engine[3]/fuel-pump-serviceable propulsion/engine[1]/generator-serviceable propulsion/engine[1]/servo-oil-pump-serviceable propulsion/engine[2]/generator-serviceable propulsion/engine[2]/vacuum-pump-serviceable propulsion/engine[3]/vacuum-pump-serviceable According to [Cassidy:2004:FE] the Pegasus engines had automatic boost and mixture controls. I think take-off boost (boost override) was only available with the mixture levers moved through a gate past the RICH position. [Cassidy:2004:FE] pp 152: "The mixture control check was normally done by the First Officer. For each engine in turn, he moved the mixture control lever back from NORMAL to RICH -. + 1 lb. sq. in, then through the gate to +3 lb. sq. in. and back to NORMAL." [Cassidy:2004:FE]: Fuel consumption for "normal" operation varied between 107.5 gal. per hour and 118.8 gal. per hour. A good average was 115 gal. per hour. Over 141 gal. per hour was considered excessive. [Cassidy:2004:FE]: Oil consumption normally varied between 8 pints to 3 1/2 gallons per hour for a Pegasus engine. "The two engine cut-out control levers were mounted either side of the throttle box. The two inner engines were controlled by the port side lever, while the starboard lever controlled the two outer engines.", [Cassidy:2004:FE] Engine automatic mixture system. The Pegasus X.C. used a Claudel-Hobson A.V.T. 85E type carburetter with variable datum boost control and automatic mixture control. See [CAB:1943]. "The corresponding fuel:air ratios over the range are: Take-off, 1:10; Rated, 1:11; Normal Cruising, 1:12; and Economical Cruising, 1:16." [CAB:1943] fcs/mixture/manual-control-factor Standard mixture position from airpressure. atmosphere/P-psf 50 0.075 990 0.45 1300 0.6 2100 1.0 fcs/outer-engines-cutoff-cmd-norm 0.0 fcs/mixture/altitude-standard-pos 1.0 fcs/mixture/manual-control-factor fcs/mixture-cmd-norm[0] 0.5 0.0 1.0

fcs/mixture-pos-norm[0]

fcs/inner-engines-cutoff-cmd-norm 0.0 fcs/mixture/altitude-standard-pos 1.0 fcs/mixture/manual-control-factor fcs/mixture-cmd-norm[1] 0.5 0.0 1.0

fcs/mixture-pos-norm[1]

fcs/inner-engines-cutoff-cmd-norm 0.0 fcs/mixture/altitude-standard-pos 1.0 fcs/mixture/manual-control-factor fcs/mixture-cmd-norm[2] 0.5 0.0 1.0

fcs/mixture-pos-norm[2]

fcs/outer-engines-cutoff-cmd-norm 0.0 fcs/mixture/altitude-standard-pos 1.0 fcs/mixture/manual-control-factor fcs/mixture-cmd-norm[3] 0.5 0.0 1.0

fcs/mixture-pos-norm[3]

Compute MAP boost in PSI for the boost gauges. Boost is measured in PSI with normal sealevel pressure as 0. 0.49115415 propulsion/engine[0]/map-inhg 14.696 0.49115415 propulsion/engine[1]/map-inhg 14.696 0.49115415 propulsion/engine[2]/map-inhg 14.696 0.49115415 propulsion/engine[3]/map-inhg 14.696 Engine autmatic boost control system. The Pegasus X.C. used a Claudel-Hobson A.V.T. 85E type carburetter with variable datum boost control. See [CAB:1943]. fcs/boost/control-rate-factor fcs/boost/control-range-norm fcs/mixture-cmd-norm[0] GE 0.99 fcs/mixture-cmd-norm[1] GE 0.99 fcs/mixture-cmd-norm[2] GE 0.99 fcs/mixture-cmd-norm[3] GE 0.99 Converts throttle lever position to datum/target boost. The target boost at closed throttle is guessed to be about minmp. fcs/throttle-cmd-norm[0]fcs/boost/override-norm[0] 0.0 1.0 0.0 -11.00 -11.00 1.0 2.50 4.25 Converts throttle lever position to datum/target boost. The target boost at closed throttle is guessed to be about minmp. fcs/throttle-cmd-norm[1]fcs/boost/override-norm[1] 0.0 1.0 0.0 -11.00 -11.00 1.0 2.50 4.25 Converts throttle lever position to datum/target boost. The target boost at closed throttle is guessed to be about minmp. fcs/throttle-cmd-norm[2]fcs/boost/override-norm[2] 0.0 1.0 0.0 -11.00 -11.00 1.0 2.50 4.25 Converts throttle lever position to datum/target boost. The target boost at closed throttle is guessed to be about minmp. fcs/throttle-cmd-norm[3]fcs/boost/override-norm[3] 0.0 1.0 0.0 -11.00 -11.00 1.0 2.50 4.25 Boost error. propulsion/engine[0]/boost-psi fcs/boost/datum-psi[0] Boost error. propulsion/engine[1]/boost-psi fcs/boost/datum-psi[1] Boost error. propulsion/engine[2]/boost-psi fcs/boost/datum-psi[2] Boost error. propulsion/engine[3]/boost-psi fcs/boost/datum-psi[3] Boost control piston movement rate. -1.0 fcs/boost/control-rate-factor propulsion/engine[0]/propeller-rpm 200.0 fcs/boost/error-psi[0] fcs/boost/error-psi[0] 0.0 fcs/boost/throttle-adjustment-norm[0] fcs/boost/control-range-norm fcs/boost/throttle-pos-norm[0] 1.0 fcs/boost/error-psi[0] 0.0 fcs/boost/throttle-adjustment-norm[0] -1.0 fcs/boost/control-range-norm fcs/boost/throttle-pos-norm[0] 0.0 Boost control piston movement rate. -1.0 fcs/boost/control-rate-factor propulsion/engine[1]/propeller-rpm 200.0 fcs/boost/error-psi[1] fcs/boost/error-psi[1] 0.0 fcs/boost/throttle-adjustment-norm[1] fcs/boost/control-range-norm fcs/boost/throttle-pos-norm[1] 1.0 fcs/boost/error-psi[1] 0.0 fcs/boost/throttle-adjustment-norm[1] -1.0 fcs/boost/control-range-norm fcs/boost/throttle-pos-norm[1] 0.0 Boost control piston movement rate. -1.0 fcs/boost/control-rate-factor propulsion/engine[2]/propeller-rpm 200.0 fcs/boost/error-psi[2] fcs/boost/error-psi[2] 0.0 fcs/boost/throttle-adjustment-norm[2] fcs/boost/control-range-norm fcs/boost/throttle-pos-norm[2] 1.0 fcs/boost/error-psi[2] 0.0 fcs/boost/throttle-adjustment-norm[2] -1.0 fcs/boost/control-range-norm fcs/boost/throttle-pos-norm[2] 0.0 Boost control piston movement rate. -1.0 fcs/boost/control-rate-factor propulsion/engine[3]/propeller-rpm 200.0 fcs/boost/error-psi[3] fcs/boost/error-psi[3] 0.0 fcs/boost/throttle-adjustment-norm[3] fcs/boost/control-range-norm fcs/boost/throttle-pos-norm[3] 1.0 fcs/boost/error-psi[3] 0.0 fcs/boost/throttle-adjustment-norm[3] -1.0 fcs/boost/control-range-norm fcs/boost/throttle-pos-norm[3] 0.0 Boost control piston position. fcs/boost/control-rate-norm[0] 1.0 -fcs/boost/control-range-norm fcs/boost/control-range-norm Boost control piston position. fcs/boost/control-rate-norm[1] 1.0 -fcs/boost/control-range-norm fcs/boost/control-range-norm Boost control piston position. fcs/boost/control-rate-norm[2] 1.0 -fcs/boost/control-range-norm fcs/boost/control-range-norm Boost control piston position. fcs/boost/control-rate-norm[3] 1.0 -fcs/boost/control-range-norm fcs/boost/control-range-norm Final throttle position. fcs/throttle-cmd-norm[0] fcs/boost/throttle-adjustment-norm[0] 0.0 1.0

fcs/throttle-pos-norm[0]

Final throttle position. fcs/throttle-cmd-norm[1] fcs/boost/throttle-adjustment-norm[1] 0.0 1.0

fcs/throttle-pos-norm[1]

Final throttle position. fcs/throttle-cmd-norm[2] fcs/boost/throttle-adjustment-norm[2] 0.0 1.0

fcs/throttle-pos-norm[2]

Final throttle position. fcs/throttle-cmd-norm[3] fcs/boost/throttle-adjustment-norm[3] 0.0 1.0

fcs/throttle-pos-norm[3]

The propeller pitch control only had the settings FINE and COARSE. fcs/advance-cmd-norm[0] GT 0.5

propulsion/engine[0]/blade-angle

fcs/advance-cmd-norm[1] GT 0.5

propulsion/engine[1]/blade-angle

fcs/advance-cmd-norm[2] GT 0.5

propulsion/engine[2]/blade-angle

fcs/advance-cmd-norm[3] GT 0.5

propulsion/engine[3]/blade-angle

The definition inside the engine file cannot write to the starter-norm property. Hence, it has to be done here. See also Engines/eng_PegasusXc.xml and Systems/electrical.xml. propulsion/engine[0]/starter-running-norm

propulsion/engine[0]/starter-norm

propulsion/engine[1]/starter-running-norm

propulsion/engine[1]/starter-norm

propulsion/engine[2]/starter-running-norm

propulsion/engine[2]/starter-norm

propulsion/engine[3]/starter-running-norm

propulsion/engine[3]/starter-norm

"The fuel pumps were Bristol vane-type Duplex pumps, driven at engine speed.", [Cassidy:2004:FE]. propulsion/engine[0]/fuel-pump-serviceable propulsion/engine[0]/engine-rpm 2600.0 propulsion/engine[1]/fuel-pump-serviceable propulsion/engine[1]/engine-rpm 2600.0 propulsion/engine[2]/fuel-pump-serviceable propulsion/engine[2]/engine-rpm 2600.0 propulsion/engine[3]/fuel-pump-serviceable propulsion/engine[3]/engine-rpm 2600.0 Engine auxiliaries (from [Short:RN-3-1-37] and [Cassidy:2004:FE]) - Port Outer - Port Inner - Rotax generator Dynamo N2 BW, 1000W at 24V - Northern oil pump (for the autopilot) - Starboard Inner - Rotax generator Dynamo N2 BW, 1000W at 24V - Romeo vacuum pump - Starboard Outer - Romeo vaccum pump propulsion/engine[1]/generator-max-current-A propulsion/engine[2]/generator-max-current-A propulsion/engine[1]/generator-current-A propulsion/engine[2]/generator-current-A propulsion/engine[1]/generator-serviceable propulsion/engine[1]/engine-rpm 0 0.00 800 24.0 2600 25.0 propulsion/engine[2]/generator-serviceable propulsion/engine[2]/engine-rpm 0 0.00 800 24.0 2600 25.0 propulsion/engine[1]/generator-voltage-V propulsion/engine[1]/generator-current-A propulsion/engine[2]/generator-voltage-V propulsion/engine[2]/generator-current-A