Selina Aircrafts · Yerevan
Hybrid powerplant for the aircraft of the future
A multi-fuel two-stroke diesel-cycle engine, a brushless motor-generator and a variable-pitch propeller — combined in one lightweight unit. Developed in Armenia as part of Selina Group.
SH-500 / SHV-500 Contact usCompany
An alliance of passionate people
Selina Aircrafts CJSC is the Armenian company of Selina Group, registered in Yerevan in 2023. It is home to the group's engine start-up: the development of a two-stroke multi-fuel engine and of the SH-500 / SHV-500 hybrid powerplants built around it.
We believe we can create the engine of the future and enrich lives around the world with the safest and most responsible ways of moving people. The world's best aircraft engines can only be made by the world's greatest people — so we meet challenging goals by engaging the talent and passion of everyone who shares the team's goal.
Selina Group develops amphibious aircraft, avionics and propellers. More at selina.aero.
Products
SH-500 / SHV-500
Hybrid powerplants with variable-pitch propellers: a 470 HP multi-fuel engine with direct injection, water cooling and dual ignition; a brushless motor-generator as a source of extra thrust on take-off; a 1960 mm four-blade propeller with feathering and reverse. CW and CCW, pusher and tractor versions.
01
SH-500
The best option for embedding in a wing. Also available as a tractor (pull) version.
02
SHV-500
The best option for a pusher installation with exhaust through the propeller spinner. Also available as a tractor (pull) version.
Design
Hybrid is the best
Running a brushless electric machine together with a combustion engine gives low weight, high on-board electric power and auxiliary power exactly when it is needed.
The two-stroke diesel cycle with direct fuel injection removes valves, camshaft, throttle and many other parts, which cuts weight dramatically. The fuel type is changed simply by switching the ECU mode.
Duplicated ignition and an emergency fuel-injection channel make the powerplant fail-safe in line with aviation requirements. An optional built-in hydraulic pump simplifies the aircraft design.
Dry sump
Scavenge pump connected directly to the isolated crankcase, external oil tank, filter, cooler and main pump with pressure regulator. The larger oil volume extends change intervals; an electronic sensor reports filter clogging.
Fail-safe
Two independent electronic ignition systems and an optional low-pressure emergency fuel-injection system.
Integrated propeller
Pusher and tractor, clockwise and counter-clockwise. Variable pitch with feathering and reverse: electronic control panel, electrically controlled hydraulics and a mechanism inside the spinner.
Features
Lightweight, multi-fuel, hybrid
The starter, the alternator and the 75 HP auxiliary electric power unit are combined in one lightweight BLDC machine.
- 55 kW starterBLDC unit
- 55 kW alternatorBLDC unit
- 75 HP auxiliary electric powerBLDC unit
- Dry sump lubrication
- No valves, no camshaft
- Water coolingonly ~500 parts
- Minimum moving and rubbing parts
- Multi-fuel
- Common rail, no throttle
Specifications
SH-500 · SHV-500
Both versions share the core and differ in installation layout: SH-500 for a wing nacelle, SHV-500 for a pusher with exhaust through the spinner.
Design values. BSFC for other fuels will be determined during prototype engine tests.
| Max power @ 3000 propeller rpm | 470 + 75HP (ICE + electric) |
|---|---|
| Shaft torque | 670N·m |
| Cycle | two-stroke, dieseldirect injection |
| Cylinders | 4 |
| Displacement | 3 600cm³ |
| Bore × stroke | 108 × 100mm |
| Compression ratio | 14,8 : 1 |
| Operating rpm | 50–82% |
| Firing order | 1&3 – 2&4 |
| Ignition | electronic, dual independent |
| Flywheel rotation | CW / CCW |
| Oil temperature, normal | 90–110°C |
| Engine oil | flash point ≥ 180 °Cregular car oil |
| Hydraulic oil | any type |
| Power generation, max (up to 5 min) | 55kW |
|---|---|
| Power generation, continuous | 20kW |
| Auxiliary electric power | 75HP |
| Blades / diameter | 4 / 196cm |
|---|---|
| Type | pusher or tractor |
| Airfoil | RAF 6 |
| Gearbox ratio | 2 : 1 |
| Thrust, max | 12kN |
| Installed weight* | 154kg |
* Including propeller, excluding external cooling and oil systems.
Weight and BSFC
154 kg together with a high maximum power gives a power-to-weight ratio of 3.5 HP/kg. Estimated fuel consumption on 95-octane car gasoline is 250 g/kWh.
Refuel with anything
The universal design accepts a wide range of fuels: car gasoline from 80 to 100 octane, Avgas or jet fuel. The engine control unit is switched to the mode for the fuel in use.
Powerplant, not just an engine
Engine, electric machine, gearbox, propeller and its control system are designed as one unit and supplied ready for installation.
Contacts
Selina Aircrafts CJSC
For partnership, investment and powerplant supply enquiries — write or call us.
| Legal name | «SELINA AIRCRAFTS» CJSC |
|---|---|
| Registration number | 264.120.1352666 |
| Date of registration | 15.11.2023 |
| TIN | 01062001 |
| Address | 23/18 D. Anhaght St., Kanaker-Zeytun, Yerevan 0069, Armenia |
| Director | Gai Mikoyan |
| Phone | +374 44 98 49 88 |
| info@selina.aero |