November 29, 2023

Diesel Power Germany

The Cars Maniacs

LiquidPiston introduces XTS-210 25hp heavy-fueled rotary engine; 1/5th size & weight of current diesel piston engines of same power

LiquidPiston introduces XTS-210 25hp heavy-fueled rotary engine; 1/5th size & weight of current diesel piston engines of same power

LiquidPiston, an innovator of compact and productive engine know-how and hybrid electricity methods, intends to commercialize the XTS-210, a 25-horsepower, two-stroke, supercharged, liquid-cooled, 210cc rotary motor. The XTS-210 is large-gasoline suitable (diesel, Jet A, JP-8, kerosene) and multi-gas capable (gasoline, propane, hydrogen). When compared to existing piston diesel engines, the XTS-210 design reduces measurement and excess weight by approximately 80{ca2182fc8fed51dc37b95061ee48b5056cde1176732b225548c54a0c0156d303}, when protecting equivalent electric power output.


XTS-210 engine main (remaining) in comparison to 25 hp Kohler KDW1003 (correct).

This announcement builds upon a $9-million enhancement agreement from the US Military to develop a prototype core motor primarily based on the XTS-210 style for military applications. (Earlier submit.)

Representing the latest technology of LiquidPiston’s X-Motor system architecture, the XTS-210 motor addresses the fuel performance, lubrication, and gasoline sort constraints of the common Wankel rotary motor.

The X-Engine is inherently easy in style and design, with just two principal relocating elements: a rotor and shaft. The 25-horsepower XTS-210 adds up to 1 bar of improve via supercharging and operates as a two-stroke, producing six combustion gatherings for every revolution of the rotor, to supply smooth electricity from a lightweight offer, roughly the sizing of a basketball.


The XTS-210 uniquely addresses four important current market demands:

  • 5x the ability-to-body weight (distinct electrical power) and electricity-to-volume (electricity density), and up to 3x the torque-to-weight (distinct torque) in contrast with piston diesel engines of similar electrical power

  • Extremely-transportable and configurable for procedure in both engine-only and hybrid-electric powered modes. Capable of functioning up to 7,000 RPM, which matches perfectly with smaller and lightweight electrical equipment, enabling increased mobility for electrical power generation and hybrid apps

  • Liquid-cooled and able of either Spark-Ignition (SI) or Compression-Ignition (CI). Built for military services-grade robustness from its inception and

  • Multi-fuel capability, with original tests focuses on JP-8/Jet-A fuels for defense and aerospace applications.

The XTS-210 design will fulfill demanding professional and military large-gas apps, together with cellular electric electric power technology, principal or hybrid-electrical propulsive electricity for vertical choose-off and landing aircraft (VTOL) and small unmanned plane programs (sUAS), as well as auxiliary electricity units for land, air, and marine cars.

There are basically no diesel engines in the 25-horsepower power course nowadays that are suitable for aerospace and cellular armed forces apps, where by dimension and pounds parameters are especially vital.

The lowered bodyweight, dimension, and major- or multi-fuel functionality of the XTS-210 delivers considerable conclude-system capability and utility positive aspects, especially for the armed forces to decrease provide chain and logistical burdens in an period the place ‘power on the move’ is significantly significant. Next nearly two decades of breakthrough thermodynamics investigate with numerous types of rotary diesel engines, we are fired up to converge on this latest generation as our initial X-Motor product that we program to carry to market.

—Dr Alec Shkolnik, co-founder and CEO of LiquidPiston

LiquidPiston is targeting shipping of an XTS-210 prototype to the US Army in 2024. The organization has previously prototyped many variants of rotary X-Engines, demonstrating important versatility in engine architecture, including the natural way aspirated four-stroke variations ranging from five to 40 horsepower.

In addition to the the latest $9-million award to lead to the development of the XTS-210, LiquidPiston has also obtained a $1.7-million Military agreement to power a hybrid-electric VTOL UAV demonstrator. This provides the company’s Department of Defense contracts full to about $30 million.