Product overview
The DL Engine DLE400 is an aero engine. It is a propulsion component, not a complete flight platform or an airframe kit. It is built to be compact and powerful, and it is designed to combine light weight, high performance and reliability. It has a displacement of 400 cm³, with a 55 mm bore and a 42 mm stroke, and is rated at 40 Hp. The compression ratio is 10:1, the fuel mixture ratio is 40:1 and the spark plug is an NGK BPMR8Y. Idle speed is 1100 RPM. The listed propeller sizes are 36 × 16 and 34 × 16.
The engine includes a permanent-magnet generator, described as a 400 W unit, that provides stable power for equipment. The standard generator outputs DC 14V and is rated at 14V 350 W at 5500 rpm. The optional DC 28V version is rated at 28V 400 W. The rectifier weighs 0.415 kg. The engine uses electric starting. The standard starter motor is rated at 12V 400 W, and a 24V 400 W starter is available as an option. The ignition operates on 8.4–14V.
The complete engine weighs 14.5 kg. Thrust is 65 kg at altitude 100 and 57 kg at altitude 1500, so output falls as altitude increases. The altitude unit is not stated for either figure. Dimensioned engineering drawings are available for installation planning.
Specifications
| Specification | Value & conditions |
|---|---|
| Idle speed | 1100 RPM |
| Bore × stroke | 55 mm × 42 mm |
| Displacement | 400 cm³ |
| Propeller | 36 × 16: 34 × 16 |
| Power | 40 Hp |
| Starting method | Electric start |
| Generator output voltage | DC 14V (optional DC 28V)DC 28V is an optional configuration |
| Complete engine weight | 14.5 kg |
| Rectifier weight | 0.415 kg |
| Compression ratio | 10:1 |
| Spark plug | NGK BPMR8Y |
| Fuel mixture ratio | 40:1 |
| Ignition voltage | 8.4–14V |
| Thrust at altitude 100 | 65 kgAt altitude 100 (unit not stated) |
| Thrust at altitude 1500 | 57 kgAt altitude 1500 (unit not stated) |
| Starter motor power | 12V 400W (optional 24V 400W)24V 400W is an optional configuration |
| Generator power | 14V 350W (optional 28V 400W) / 5500 rpmAt 5500 rpm; 28V 400W is an optional configuration |
| Generator type | 400W permanent-magnet generator providing stable power for equipment |
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