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Engine Data Sheets

Mechanical Data tables

UK Aero Engines: Page 107 of 140

N/A = Not Applicable --- NA = Info Not available

MakerCirrus-Hermes MinorNapier Dagger Series IINapier Dagger Series IIINapier Rapier Series VNapier Rapier Series VIPobjoy Niagara IVR-R Kestrel IV, V, VI
ArrangementInlineH-6H-6H4H4RadialV 60 deg 12
No of Cyls424241616712
Bore/Stroke3.74" x 5.00"3.8125" x 3.75"3.8125" x 3.75"3.50" x 3.50"3.50" x 3.50"3.19" x 3.43"5.00" x 5.50"
Displacement229.6 cu ins1027.5 cu ins1027.5 cu ins538.8 cu ins538.8 cu ins191.4 cu ins1296.0 cu ins
Comp Ratio5.80:17.75:17.75:17.00:17.00:16.50:16.00:1
bmep Cruise95125139109130122119
Blower ratioN/A6.47:15.04:16.33:15.27:1NA8.83:1
Cyl MaterialSteelSteelSteelSteelSteelSteelSteel liner
Valves per cyl1 Inl 1 Exh1 Inl 1 Exh1 Inl 1 Exh1 Inl 1 Exh1 Inl 1 Exh1 Inl 1 Exh2 Inl 2 Exh
HP max - not Take-Off90755805340395108640
@ RPM2600400040004000400037502900
@ AltitudeSea Level12500ft5000ft13000ft5800 ftSea Level14000 ft
HP Take-Off7571076033536595700
@ RPM2200350035003500350034002500
HP Cruise63565630260310100485
@ RPM2300350035003500350032302500
Fuel Octane70878787877087
Prop DriveDirectGearedGearedGearedGearedGearedGeared
Dry Weight195 lbs1280 lbs1280 lbs 713 lbs713lbs164 lbs955 lbs
lb/Cruise HP3.
Carb(s)1 X Claudel1 X Claudel1 X Claudel1 X Claudel1 X Claudel1 X Claudel1 X R-R Own
IgnitionBTH Mag(2)BTH Mag(2)BTH Mag(2)BTH Mag(2)BTH Mag(2)Rotax Mag(2)BT-H/Watford Mag(2)
Electric StarterBTHRotax InertiaRotax InertiaRotax Gas/HandRotax Gas/HandRotax Own Hand
Bed centres15.20"17.12"17.12"18.50"18.50"19.75"17.25"

Let me know if any of the above does not read true, or if you have information that does not agree. Wherever possible, I will update these pages on a regular basis as data comes in.

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