What is LiquidPiston?
Headquartered in Bloomfield, Connecticut, LiquidPiston is an engineering firm dedicated to the development of high-performance rotary engines. Its core innovation, the HEHC thermodynamic architecture, integrates the benefits of Diesel, Otto, and Atkinson cycles to deliver superior efficiency and reduced vibration. The company's technology is highly scalable, ranging from 1 HP to over 1,000 HP, making it an ideal solution for UAVs, urban air mobility, and specialized military applications. With a history of support from organizations like DARPA and the U.S. Army, LiquidPiston maintains a robust R&D infrastructure, including advanced dynamometer testing facilities, to ensure its propulsion systems meet the rigorous demands of modern aerospace and defense environments.
How much funding has LiquidPiston raised?
LiquidPiston has raised a total of $46.4M across 9 funding rounds:
Series B
$5M
Series C
$6.5M
Private Equity
$1.1M
Other Financing Round
$1.1M
Debt
$150K
Debt
$284K
Private Equity
$30M
Stock/Share Issuance
$501K
Series B (2011): $5M, investors not publicly disclosed
Series C (2013): $6.5M supported by Adams Capital Management, Inc. and Northwater Capital Management, Inc.
Private Equity (2015): $1.1M featuring Northwater Capital and Adams Capital
Other Financing Round (2020): $1.1M, investors not publicly disclosed
Debt (2020): $150K with participation from PPP
Debt (2021): $284K led by PPP
Private Equity (2023): $30M, investors not publicly disclosed
Stock/Share Issuance (2026): $501K, investors not publicly disclosed
Key Investors in LiquidPiston
Adams Capital Management, Inc.
A Pittsburgh-based venture capital firm specializing in early-stage applied technology investments. They leverage deep expertise in networking and IT infrastructure to help portfolio companies achieve market leadership.
Northwater Capital Management, Inc.
An investment firm focused on high-reliability product manufacturing and safety-critical technologies. They provide strategic support to companies operating in demanding, high-risk environments.
Undisclosed Investor
An undisclosed institutional partner participating in the latest financing round to support the company's long-term strategic growth objectives.
What's next for LiquidPiston?
With the recent injection of capital, LiquidPiston is poised to transition from advanced R&D into broader commercial and defense-sector integration. The strategic focus will likely center on scaling production capabilities for its X Engine platform to meet the increasing demand for lightweight, high-efficiency propulsion in autonomous systems and urban mobility. By optimizing its manufacturing processes and expanding its footprint in the aerospace market, the company aims to solidify its position as a leader in next-generation engine technology. Future milestones will likely involve deeper collaboration with defense contractors and commercial partners to validate the HEHC architecture in real-world, high-stress operational environments.
See full LiquidPiston company page
