The HIGGS Diesel is a clean sheet combined cycle, spark ignition, multi-fuel solution for the needs of today. Weighs only 664lbs / 302kgs. 

Efficiency & Economy

It is necessary to emphasize the importance of the very high volumetric efficiency of the traditional piston controlled ports employed by the standard two cycle engine. Until now no existing type of inlet valve could produce the essential requirements of presenting the maximum inlet area to the air in the minimum time.

The new design outlined below, significantly increases both the utility and the efficiency of the of the two cycle engine, which may now be more efficiently scavenged.

The port layout adopted concentrates the scavenge flow at the wall of the cylinder opposite the exhaust port. This compares with more evenly dispersed scavenge flows common in conventional engines. Scavenge flow within the cylinder provides, in effect, a form of stratified charging and explains improvements in fuel economy obtained with such a simple layout.



Our design enables combined cycle engines to compete with four-cycle engines in terms of fuel economy, especially under cruise conditions. The crankcase, freed from any gas exchange functions, is well lubricated; the working processes being sealed above the piston. Isolation of the crankcase also permits a full pressure lubrication system to be used, as in four-cycle engines.


Inherent piston cooling characteristics of the combined cycle piston design offer a major durability advantage over conventional two-cycle engines, allowing much leaner fuel delivery than can be sustained with traditional crankcase scavenging, where usually piston overheating and consequent seizure are common. This technology operates without complex mechanical components such as cams, valves mechanisms and the other various precision components necessary to operate them.

The absence of these mechanical components eliminates a large number of moving parts, thereby considerably reducing the costs and maintenance requirements, whilst significantly increasing reliability and retaining the simplicity of the two cycle engine. With this combined cycle design two cycle engine technology, combined with the enormous benefits together with their appealing simplicity, a new generation of light weight high performance power plants can be achieved. Which until now would have been almost impossible.

CONDOR Features

V12 (1000hp-1600hp)  E-1000J/G and E-1000J/G-T clean sheet design engines.  These engines will demonstrate our unique design for achieving the needed horsepower while keeping the weight of the jet burning engine at or below similar AVgas versions of these engines.


  • Conventional 4 cycle wet sump lubrication
  • No valve gear
  • Low thermal loading of the piston
  • High durability with low exhaust emissions
  • Compact low mass design
  • Extended oil change periods (oil does not degrade)
  • Extended maintenance intervals (less parts to maintain)
  • New concept in high performance aircraft engine
  • Unique operating method
  • Low part count for high life
  • Extremely high power to weight
  • Minimum vibration
  • Low noise and heat signature
  • Also available as forced induction / E-1000J/G-T
  • Weighs only 664lbs / 302kgs 


Higgs Diesel

Combined Cycle Technology.

British Design

Japanese Manufacturing and US Tech.


Standing for quality, innovation and performance since 2007.