SERIES

4201

Engine for Light Aviation and UAVs

Engine for Light
Aviation and UAVs

BACK TO ALL PRODUCTS

Perfectly matched with endurance.

The 42 Series air-cooled two-stroke engines are the ultimate solution for UAV propulsion systems, offering advanced closed-loop control for optimized performance in extreme environmental conditions.

Built on Hirth’s globally trusted engine design—proven in countless UAV missions—the updated 42 Series integrates the latest in UAV engine technology, delivering a high-performance propulsion system that exceeds industry standards.

Engineered for reliability, the 42 Series features automatic altitude and temperature compensation, ensuring consistent operation even in harsh environments. With its lightweight construction and unmatched power-to-weight ratio, it is the ideal choice for unmanned aerial vehicles requiring high-performance engines.

Ready to enhance your UAV’s capabilities? Discover how the 42 Series can redefine performance in challenging conditions.

BASIC FACTS

Engine Type

Two Stroke Boxer

Cooling

Air Cooling

Measured Power

13,6 HP

Fuel Type

Petrol

OPTIONS

  • 2 Exhaust Styles
  • Up to 500W starter/generator
  • Oil injection
  • Customization (e.g. Quality documentation, design, rotation direction,…)

TECHNICAL SPECIFICATION

Motor4201

TYPE

CylinderTwo-Stroke
Starting DeviceStarter Generator
Running DirectionCCW
CoolingAir Cooled
IgnitionSingle
ExhaustNormal

FUEL

FuelPetrol

MEASUREMENTS

mmin
Stroke40,001,57
Bore54,002,13
Length214,508,44
Width339,8013,38
Height239,709,44

WEIGHT

kglbs
Weight without exhaust7,1415,74
Weight Exhaust1,152,54

PERFORMANCE

kWHPNm
Power measured (full throttle)10,1413,6014,90
Power measured (best point)10,1413,6015,50
Specific fuel consumption @6500rpm(g/kWh)482,83
Specific fuel consumption
@best point (70-80% load, 1/2 rated speed)
(g/kWh)434,79
SpeedRPM6500

POWER CHART

TECHNICAL DRAWINGS

ENGINE GALLERY
REPOSITORY

Technical Documenation

Our free-of-charge repository of the documentation for this Engine family.

3507 Engine has Heavy Fuel capabilities

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CASE STUDY

Our Engines are available through our partners.

From our Sales Office in Austria, we proudly offer the finest European-made Engines to customers worldwide.

CONTACT US
Mapa

Find our partner close to Your location:

Hirth Global Sales GmbH
Tower street 3, Office Park 4, Top A15
A-1300 Vienna International Airport
Austria

Hirth Global Sales GmbH
Tower street 3, Office Park 4, Top A15
A-1300 Vienna International Airport
Austria

Hirth Global Sales GmbH
Tower street 3, Office Park 4, Top A15
A-1300 Vienna International Airport
Austria

Hirth Global Sales GmbH
Tower street 3, Office Park 4, Top A15
A-1300 Vienna International Airport
Austria

Hirth Global Sales GmbH
Tower street 3, Office Park 4, Top A15
A-1300 Vienna International Airport
Austria

Hirth Global Sales GmbH
Tower street 3, Office Park 4, Top A15
A-1300 Vienna International Airport
Austria

Hirth Global Sales GmbH
Tower street 3, Office Park 4, Top A15
A-1300 Vienna International Airport
Austria

Let’s listen to our customers

Discover how professionals around the world rely on Hirth’s advanced propulsion systems for outstanding performance, cutting-edge innovation, and proven reliability. Hear their stories and see why they choose Hirth for their most demanding missions!

CUSTOMER'S STORIES

Igniting the story soon...

Igniting the story soon...

Igniting the story soon...

HIRTH ENGINES IN numbers

0
Engines sold across almost of the 100 Year History of the company.
0
Flying hours of the 42 Heavy Fuel Series Engines Fleet
Certificates
ISO 9001

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