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kel Rotary Combustion Engine

units for aircraft, etc. Due to its Techno-Economics
wide application the market size is
significant. 55 hp Wankel Engine:
¡¡ Indigenous engine cost is about 40
Commercialization
55 hp Wankel Engine: Technology is percent lower than the imported
given to DRDO for defense applications similar class of engine
and limited series production of 20 ¡¡ Spare parts cost is much lesser
engines were completed. than the imported parts
¡¡ Foreign exchange saving for the
Available in Market country
55 hp Wankel Engine: Currently in use ¡¡ Lot of time saving due to delay in
for strategic sector. Not available in the import and export license clear-
market.
ance from authorities.

Comparison of CSIR-NAL’s
CoImnpdariigsoen nofoCSuIRs-NWAL’as InndkigeenloRusoWtaanrkyel RCotoarmy CbomubsutstiioonnEnEginnegs ines

55 hp 65 hp 30 hp

Type Single rotor Wankel engine
Thermodynamic cycle
Power (ISA-sea level) Otto cycle
Max propeller speed
Cylinder capacity 55 hp (41 kW) @ 8000 rpm 65 hp (48 kW) @ 8000 rpm 30 hp (22.4 kW) @ 7000 rpm
Compression ratio
Housing Cooling 4000 rpm (Reduction drive) 4000 rpm (Reduction drive) 7000 rpm (Direct drive)
Rotor cooling
Lubrication 324 cc 397 cc 216 cc
Ignition
Fuel used 9.2 9.2 9.2
Fuel supply
Water-Glycol mixture Water-Glycol mixture Ram air
Specific fuel consumption
Air cooled Air cooled Ram Air
Engine installed weight
Total loss forced lubrication system Total loss forced lubrication system Total loss forced lubrication system
Status
CDI system CDI system CDI system

AV GAS- 100LL/ Gasoline AV GAS- 100LL/ Gasoline AV GAS- 100LL/ Gasoline

Carburetor- Diaphragm type Carburetor- Diaphragm type Carburetor- Diaphragm type

335 to 365 g/ kWh 335 to 365 g/ kWh 335 to 365 g/ kWh
(0.55 to 0.60 lb/ hp/ h) (0.55 to 0.60 lb/ hp/ h) (0.55 to 0.60 lb/ hp/ h)

35.6 kg 41 kg < 15 kg

Development Completed 2 Nos. Prototype Engine delivered to Under development
DRDO for flight testing

AS 12