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Aero Engine Data Sheets

Mechanical Data tables

Italian Aero Engines: Page 130 of 140

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

MakerIsotta Fraschini 750RCIsotta Fraschini XIRIsotta Fraschini XIRC40Isotta Fraschini CacciaIsotta Fraschini Astro 7C21 -- --
ArrangementWVVVRadial----
CoolingLiquidLiquidLiquidLiquidAir----
No of Cyls181212127----
Bore/Stroke5.12" x 6.69"5.75" x 6.30"5.75" X 6.30"4.92" x 5.12"6.06" x 6.30"----
Displacement4073 cu ins1991 cu ins1991 cu ins1257.20 cu ins1272.2 cu ins----
Comp Ratio5.70:16.70:16.40:15.70:15.95:1----
bmep Cruise70103105119110----
Blower ratio11.46:1N/A10.70:1N/A7.65:1----
Cyl MaterialSteelSteelSteelSteelSteel----
Valves per cyl2 Inl 2 Exh2 Inl 2 Exh2 Inl 2 Exh2 Inl 2 Exh1 Inl 1 Exh----
Valve Arr.OHVOHVOHVOHVOHV----
HP max - not Take-Off900895900480450----
@ RPM19002250240025502100----
@ AltitudeSea LevelSea LevelSea LevelSea LevelSea Level----
HP Take-Off850Not Given860Not Given420----
@ RPM1750Not Given2140Not Given2000-- --
HP Cruise550450500Not Given320----
@ RPM153017401900Not Given1800----
Fuel Octane8787878787----
Prop DriveGearedGearedGearedDirectDirect----
Dry Weight1609.4 lbs1289.7 lbs1322.8 lbs840 lbs723.1 lbs----
lb/Cruise HP2.922.862.641.75*2.26----
Carb(s)6 X Own4 X Own4 X Own4 X Zenith1 X Own----
IgnitionMarelli Mag(2)Marelli Mag(2)Marelli Mag(2)Marelli Mag(2)Marelli Mag(2)----
Starting MethodOwn, Comp AirOwn, Comp AirOwn, Comp AirOwn, Comp AirOwn, Comp Air-- --
Length86.37"75.16"83.88"69.92"19.84"----
Height/O.D.47.44"40.16"42.84"31.89"47.25"----
Width40.55"32.40"32.84"29.13"Not Given----
Bed centresNot GivenNot GivenNot GivenNot GivenNot Given----
Mount DiaNot GivenNot GivenNot GivenNot GivenNot Given----

* At Maximum HP

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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