SW55B5.5 kgf · 53.9 N
Ultra-Compact Turbojet

SW55B

5.5 kgf / 53.9 N Class · 60,000–170,000 rpm

The smallest engine in the range: 535 g bare, 780 g all-up, and the highest speed band of any model at 60,000-170,000 rpm. 53.9 N from a 0.535 kg engine unit — a bare-engine thrust-to-weight ratio of 10.3:1, 780 g all-up with accessories. Runs on aviation kerosene, starts electronically, and reports telemetry over RS-232.

5.5 kgf
Thrust
53.9 N
Rated
0.535 kg
Engine Weight
10.3:1
T/W (bare)
170,000
Max RPM
750 °C
Rated EGT
Technical Data

Full Specifications

Every parameter below comes from the manufacturer's Rev. A/2 datasheet.

Performance

  • Rated Thrust5.5 kgf / 53.9 N / 12.1 lbf
  • Idle to Max Speed60,000 - 170,000 rpm
  • Minimum Speed35,000 rpm
  • Thrust-to-Weight (bare engine)10.3 : 1
  • Thrust-to-Weight (all-up)7.1 : 1
  • Max Fuel Flow230 g/min
  • Equivalent Full-Throttle Flowapprox. 13.8 kg/h

Physical & Installation

  • Max Diameter69.5 mm
  • Overall Length175.2 mm
  • Engine Unit Weight535 g
  • ECU Weight (V3)42 g
  • All-up Weight (with accessories)780 g
  • Operating Temperature0 C to +40 C
  • InstallationSingle-shaft turbojet, fixed mounting frame supplied

Start & Run Settings

  • Fuel Pump Voltage0.8-2 V
  • Speed Ramp100 %
  • Fuel Pump Ramp3
  • Glow Plug Voltage6.6 V
  • Ignition Fuel Valve40-60
  • Ignition Speed3,000 rpm
  • Preheat Speed12,000 rpm
  • Clutch Disengage Speed35,000 rpm
  • Acceleration / Deceleration Curve15 / 15
  • Cooling Setting5,000 rpm
  • Fuel Pump Limit13 V
  • Min. Supply Voltage10 V

Control & Telemetry

  • Throttle SignalPWM 1-2 ms (1 ms = 0 %, 2 ms = 100 %)
  • PWM Logic Level3.3 V or 5 V
  • Start SwitchPWM-controlled, one-key electronic start
  • TelemetryRS-232
  • Starter MotorElectric, retractable
  • Eject Time0.4 s
  • Eject Voltage4.5 V
  • Run Voltage4 V

Accessories & Logistics

  • Accessory Setengine unit, ECU (V3), GSU, mounting frame, brushless fuel pump, power cable, signal cable, throttle cable, ball valve, fuel filter and 1.5 m fuel lines
  • Packing Case22 x 17 x 15 cm
  • Packing Weight1 kg
  • FuelAviation kerosene
  • Lubricant3 % - 5 % turbine oil in fuel
  • Service Interval25 h

Compliance

  • Thrust Class5.5 kgf / 53.9 N
  • Dual-Use ThresholdBelow the 400 N threshold - no export licence required for most destinations
  • Manufacturer ScopeModel-aircraft flight, competition, demonstration, firefighting and road-surface drying only
  • DatasheetRev. A/2 technical specification sheet, full parameters published
Why This Model

What Sets It Apart

Power density

53.9 N from a 535 g engine unit - a bare-engine thrust-to-weight ratio of 10.3:1.

42 g ECU

The V3 ECU weighs 42 g, so the whole accessory set adds only 245 g to the airframe.

Speed band

Runs 60,000 to 170,000 rpm with a 60,000 rpm idle and 5,000 rpm cooling setting.

Kerosene and 25 h service

230 g/min at full throttle on aviation kerosene with 3-5 % turbine oil; scheduled service every 25 hours.

Civil scope, full datasheet

Manufacturer-rated for model flight, competition, demonstration, firefighting and road drying. Every start, run and control parameter is published.

Applications

Where It Fits

Civil and commercial domains within the manufacturer's stated scope of use.

High-Speed Unmanned Aircraft

Primary propulsion for fixed-wing and hybrid airframes in the 5.5 class.

Firefighting & Emergency Response

High-thrust, low-weight power for rapid-response unmanned platforms.

Industrial Air & Surface Drying

Compact jet output for drying, cleaning and air-movement duties.

Research & Competition Flight

Repeatable, fully documented parameters for test benches and race airframes.

Scope of Use & Export Compliance

The manufacturer specifies this engine for model-aircraft flight, competition, demonstration, firefighting and road-surface drying — entertainment and civil applications only. Modification for unlawful purposes, or resale to countries under national export restrictions, is prohibited.

Rated thrust sits below the 400 N threshold used in dual-use classification, so most orders ship without an export licence. Every shipment still requires an end-user certificate (EUC) and a review of the destination and stated end use.

Every engine ships with a manufacturer's certificate of conformity and full shipping documentation. Accessory set: engine unit, ECU (V3), GSU, mounting frame, brushless fuel pump, power cable, signal cable, throttle cable, ball valve, fuel filter and 1.5 m fuel lines.

Ask for pricing and lead time

Tell us the airframe, target thrust and operating profile — we reply within 24 hours with a quote and the full datasheet.