Human Dynamo
Human Dynamo
The Human Dynamo is a compact and efficient full body cardio machine.
Launch Chair
Launch Chair
An office chair that allows the user to fully stretch and exercise the legs while at their desk.
Henry Co-Gen
Henry Co-Generation for Vehicles
A system for extra fuel efficiency for diesel engines driven by waste heat.
Henry Steam Engine
Henry Rotary Steam Engine
The Henry Engine is a rotary steam engine for small scale systems.
SquareFace Golf System
SquareFace Golf System
A sports training system for monitoring and comparing a golfer's swing to a desired norm or standard at the point of impact of a golf ball, so as to thereby detect deviation (e.g., hook or slice) from such desired norm or standard.

The Henry Rotary Steam Engine

The pursuit of a rotary steam engine began in the early 1900's but technical problems with seals and lubrication made their commercialization elusive.
Eventually steam turbines replaced piston engines for larger scale power generation and internal combustion engines soon dominated the market as the availability of gasoline and diesel fuels became widespread.

The Concept of the Super Hybrid

Much of the heat loss in a combustion engine goes out the exhaust at about 900°F when under load.
The "Super Hybrid" is similar to a modern combined cycle power plant in which a gas turbine's exhaust provides the heat for a steam turbine.
Plant efficiency can approach 60% in such a plant where a gas turbine alone is around 35%.
Because the Henry Engine will be less expensive than a turbine, it is conceivable that this combined cycle efficiency can be applied to automotive applications. The ideal scenario would be for such a package to run a generator at either full power or be shut down. A bank of batteries would provide start up power and also be used where high power is needed (climbing a hill or passing).
Because the system runs at an optimum speed, emissions and fuel economy are the lowest possible. The overall gain would be on the order of 15% in efficiency with a corresponding reduction in emissions per mile.
We believe this is the next logical step in the quest for better propulsion systems.
Please contact us for additional information.

Principle Goals

  • An engine with a higher efficiency than turbines of the same power rating.
  • A design which is less expensive to produce than a turbine.
  • Similar smooth running characteristics as a turbine.
  • A simple design which is easy to repair or service in the field.
  • Ability to handle wet steam due to its robust parts and slower speeds (3000 RPM).
  • Higher efficiency over much of its RPM range making speed control less critical than in turbines.

Possible Applications

Exhaust heat recovery from combustion engines

- Just as in modern combined-cycle power plants where the hot exhaust gasses (approx. 900°F) from the turbine heat water to make steam which then powers the Henry Engine. The engine can be coupled to a generator to make electricity or it can put power directly into the drive train. It is possible to get an additional 15% in energy output by using wasted exhaust heat. The steam condenses to water again in a condenser and goes around and around in a closed loop.


- A smaller less expensive engine would mean that lower temperature deep earth heat sources could be utilized. There is an vast amount of this type of energy available around the world.

Concentrating Solar

- Mirrors focus the sun on heat collection tubes and 800°F steam can be produced. There are already over 300 megawatts of this energy being produced in the deserts of southern California. This is enough for a city of 200,000 people. A less expensive steam engine could open up more opportunities for this type of totally clean energy.