Fiat A.24
{{short description|1920s Italian piston aircraft engine}}
| {{Infobox Aircraft Begin
| name=A.24 | image=FIAT A. 24R.jpg | caption=A.24R }}{{Infobox Aircraft Engine |type=Water-cooled V-12 |manufacturer=Fiat Aviazione |designer= |national origin= |first run=c.1926 |major applications= |produced= |number built=at least 100 |program cost= |unit cost= |developed from= |variants with their own articles= }} |
The Fiat A.24 was an Italian water-cooled aircraft engine from the 1920s.
Design and development
During the second half of the 1920s Fiat introduced several water-cooled aircraft engines, including the A.20, A.22, A24, A.25 and A.30. They were all upright V-12s with 60° between the cylinder banks; capacities ranged between 18.7 L and 54.5 L (1,141-3,326 cu in) and power outputs between 320 kW and 745 kW (430-1,000 hp). Producing 520 kW (700 hp) from 32.3 L (1,971 cu in), the A.24 was near the center of this range.
When Fiat was advised by the Italian government to simplify their water-cooled product line, they decided to focus on the A.20, A.22 and A.30 models such that the A.24 was not manufactured in large numbers.
Variants
;A.24: Initial version, ungeared.
;A.24 R.: Geared output.
Applications
Specifications (A.24R)
{{pistonspecs
|ref=Jane's All the World's Aircraft 1938.
|type=water-cooled 60° upright V-12
|bore= 140 mm (5.51 in)
|stroke= 175 mm (6.89 in)
|displacement=32.3 L (1,971 cu in)
|length=1.770 m (69.69 in)
|width=735 mm (28.9 in)
|height=1.065 m (41.93 in)
|weight= Dry 550 kg (1,213 lb)
|valvetrain= Two overhead camshafts, geared together, driving two inlet and two exhaust valves per cylinder. Housed under aluminium casings.
|supercharger=
|turbocharger=
|fuelsystem=Twin water heated Fiat carburetters mounted between cylinder banks, one serving each bank. Two spark plugs per cylinder, placed horizontally and opposite each other, supplied by two Marelli MF.12 magnetos.
|fueltype=
|oilsystem=One delivery pump and two scavenge pumps, in a single unit.
|coolingsystem= water, with centrifugal pump.
|power= 520 kW (700 hp) at 2,000 rpm, continuous.
|specpower=
|compression=5.7:1
|fuelcon=0.302 kg/kWh (0.496 lb/hph)
|oilcon=
|power/weight=
|designer=
|reduction_gear=1.545:1 spur gear, lubricated via oil spout.
|general_other=
|components_other= Cylinders: Forged steel barrels, with closed, flat ends.
- Pistons: Aluminium alloy, two compression rings and two scraper rings above fully floating gudgeon pin.
- Crankshaft: Each six throw, seven bearings.
- Crankcase: Each an aluminium casting, split below crankshaft centre line. Bolted-on duralumin end caps.
|performance_other=
}}