The Combustion Engine Reimagined


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Total Addressable Market

Military & Aerospace
Industrial & Commercial
Urban Air Mobility (UAV)

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Engines designed for applications where less is more

LiquidPiston engines offer size and weight advantages, with potential for significantly increased range and reduced CO₂ emissions compared to gasoline and diesel-powered vehicles.

As seen in

"LiquidPiston's engine, dubbed the X-Engine, looks tiny next to its traditional counterparts, yet it packs up to 10 times more punch per pound."

"LiquidPiston is on the brink of revolutionizing power generation for several application markets."

"With over 15 years of R&D in the making and having already achieved numerous partnerships across military and aerospace leaders, there’s no telling how proliferated this technology can become."



  • Lightweight & Compact
    Up to 80% smaller and lighter than the traditional piston Diesel engines.
  • Simplicity
    Only two primary moving parts, optimally balanced.
    High-Efficiency and Lower Fuel Consumption
    Up to 30% decrease in fuel consumption, lower CO₂ emission and lower cost of running an engine.
    Quiet and Near-Zero Vibration
    With lower pressure exhaust and just two moving components that are optimally balanced, the engine is inherently quiet, and offers exceptionally low vibration.
We develop advanced rotary engines based on our patented HEHC thermodynamic cycle and engine architecture. LiquidPiston engines are designed to be:

Engines designed for applications where less is more

Less weight, space, vibration, noise, fuel consumption… More power. Building on over 15 years of R&D, LiquidPiston provides a power solution that can scale to address the needs of the $400B internal combustion engine market and is a key enabler for emerging mobility technologies including electric cars, urban aircraft, and drones. The company is focusing on military and aerospace markets, whose propulsion and power generation segments represent large application opportunities for LiquidPiston. The company also plans to enter industrial and commercial, marine, UAV, urban mobility, and automotive markets.


Up to 10X smaller and lighter and up to 30% more efficient

Company Highlights

  • Multiple engagements with US Army and Air Force, exceeding more than an aggregate of $15M in contracts
  • Up to 30% more efficient than a diesel engine, and up to 200% more efficient than a small turbine
  • 77 patents issued and pending
  • Raised $16M+ from 7,500+ Investors
  • Our latest Reg CF offering oversubscribed in just 9 hours!
  • Finalist / Award Winner in several DoD competitions, including: the US Army xTechSearch 3.0, U.S. Army and Innovation Combine, and AFWERX Base of the Future Challenge
  • Our rotary engines are the first major disruption to engine technology in over a century

Electric Vehicles use big, heavy, expensive batteries

  • 36lbs of fuel can displace 1,000 pounds of battery
  • LPI Hybrid Power System eliminates 90% of battery pack
  • LPI engines allow more range for an electric vehicle, by using smaller, lighter, more cost effective batteries.
  • CO₂ emissions and fuel consumption reduced
  • Problem

  • Gasoline engines are inefficient
  • Diesel engines are big and heavy
  • Electric batteries weigh a ton compared to what they produce
  • Battery-only EV's are limited in range and recharging takes a long time
  • Limited payload
  • High operating costs
  • Solution

  • Compact, lightweight engine
  • Power-dense and multi-fuel capable
  • High power to weight
  • Few parts and simplicity
  • Near-zero vibration
  • Cuts on fuel and CO₂ emissions
  • Cuts costs
  • Efficiently burns fuel, minimizing wasted energy lost through cooling losses and engine exhaust

Wellbox's Stakeholders Say

LiquidPiston is on the brink of revolutionizing power generation for several application markets.


Alexander Shkolnik
Co-Founder & CEO
• PhD in Computer Science / Artificial Intelligence from MIT

• Technical focus on leading teams in modeling dynamic systems, optimization and controls

50+ patents; 30 conference and journal papers

• PI on $9M in government R&D programs
Nikolay Shkolnik
Co-Founder & CTO
• PhD in Physics from University of Connecticut (UConn)

Former Clean Energy Program Director, GEN3

• Motorola award for Creativity

60+ patents: engines, fuel cells, super capacitors, and other fields

TRIZ specialist
Per Suneby
SVP of Corporate Development and Board Director
MBA, Harvard; BASc Electrical Engineering, U. British Columbia

• Seasoned Clean Tech startup executive

• Former Venture Capital Executive in

• New England Clean Energy Fellow

Live Investor Webinar with Q&A

Join Alec Shkolnik, LiquidPiston's President & CEO, in an exclusive investor webinar to learn more about LiquidPiston's revolutionary technology and the current opportunity to invest in the company on StartEngine.

Topics covered:

  • Current Reg A+ Fundraising Round on StartEngine
  • LiquidPiston's competitive advantages
  • LiquidPiston's potential impact on a $400B market

LiquidPiston, Inc. (LPI) develops advanced rotary internal combustion engines based on the company’s patented thermodynamic cycle and novel rotary engine architecture. Our engines are compact, powerful, quiet, efficient, low-vibration, multi-fuel capable and scalable from 1HP to over 1000 HP.


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