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Directory:Gun Engine

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&lt&lt A Congress:Top 100 Technologies -- RD Energy Technology &gt&gt

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Image:SusukiGunEngine300x300 byKevn.jpg

Canadian inventor, Kazimierz ("Stan") Holubowicz, has come up with an environmentally friendly and transmission-free engine based on the same mechanics as how a bullet is shot from a gun. The engine can run on any liquid or gaseous fuel, including Directory:Acetylene. Initial test results showed 92% efficiency.

How it Works : The fuel is vaporized before going into the combustion chamber. Vaporized fuel combusts much more rapidly. The piston moves against an air chamber, which then pushes it back into position in a spring-like action once the combustion is complete. This prevents mechanical stress on the components. Water is injected 8 parts per one part fuel, along with the fuel. As the fuel combusts, the heat turns the water to steam, augmenting the expansion in the chamber. This also absorbs the heat so that the run temperature is much lower. The exhaust is only 140 degrees Fahrenheit. (There was an error working with the wiki: Code[1]...)

A recent test of a Suzuki engine on a dynamometer showed a 14% increase in power using just 10% of the amount of fuel using the Gun Engine technology.

: "The gun-engine does not require any exhaust treatment, thus it does not have catalytic converter. The formation of NOx is blocked by the superior design that does not synthesize pollutants. The efficiency is high (above 95%) because the gun-engine is cooled internally and the cooling preserves heat that is than converted into additional work. The design of the gun-engine eliminated all causes of inefficiency in current engines inherited from the first prototypes of Otto and Diesel inventions. The myth that engines must be inefficient is exposed!" -- Stan (August 15, 2008)

Official Website

Gun Engine


Image:FreeEnergyNowRadioIcon95x95 byKevn.gif

Download (13 Mb mp3) - On August 4, 2008, Congress:Founder:Sterling D. Allan conducted a 1-hour interview with Stan Holubowicz as part of the Free Energy Now radio series.

Latest Developments

July 22, 2008

Inventor Kazimierz Holubowicz wrote:

I've attached a photo of a suzuki that had been converted into gun-engine technology. It is attached to a dynamometer ready for testing.

Image:Gun Engine Suzuki dynamometer 600.jpg

The conversion includes:

a device to vaporize fuel that also pre-mixes the resulting vapor with air in explosive proportion

an internal cooling that preserves heat to avoid thermal losses infesting today's engines

a device to convert the preserved heat into additional work (extra mileage)

replacing original combustion with rapid fuel detonations

a device to adjust compression ratio on the run to accept any fuel octane

meetings of highest pressure acting on work piston with horizontal crank

As convert detonates fuel vapor, which yields about fourteen times higher pressure than max pressure of the original Suzuki, I limited fuel supply to 10% of the original spec to avoid cylinder bursting, yet the measured power output reading was exceeding max power of original Suzuki fully fueled. Also no traces of pollutants in emissions (zero toxic emissions).

I also run the convert on many fuels including Hydrogen. No visible performance were noticed, yet the most important was that the convert runs very well on Acetylene that is already in production and the distribution infrastructure exists. This fuel is important as it is made out of coal and not petroleum.

Jan. 2008

A group in Utah has been helping with prototype refinement, but recently has run into some personality issues and conflicts over intellectual property and control which may stymie if not derail the project.

Oct. 2007

Production prototyping nearing completion. They're looking at a retrofit solution that could double or even triple a vehicle's mileage.

How it Works

Comparison to a Gun

On Aug. 5, 2008, Stan Holubowicz wrote:

A gun resembles engine because:

- barrel resembles cylinder

- bullet resembles piston

- primer resembles ignition

- case of ammo resembles combustion chamber

- powder stores chemical energy similar to fuel

When a gun barrel prolongs cylinder of traditional engine the combination is a new engine that is the gun-engine, with one exception that the gun is replaced with a gun-device that uses fuel instead of powder, but the operation is similar in both.

When squeezing trigger powder explodes and bullet accelerates towards piston, which compresses air in the space of barrel and cylinder. As bullets flies towards the piston it compresses air, thus pressure over piston rises until it is as high as that of resulting powder detonation. Thus bullet stops rebounding and the process reverses.

Proper selection of the mass of bullet and powder causes that the max pressure occurs when crank is horizontal, which boosts torque up to 100 times. and also makes torque independent from speed, which allows elimination of transmission in cars.


US Patent filed.

Canadian: CA2476167


Abstract of CA2476167 : This invention deals with the efficiency of engines. It proposes to replace current combustion with explosions of fuel to eliminate losses of fuel (caused by disintegrations of fuel), improve internal pressure, and eliminat e black engine deposits together with emissions of black particulates. The invention proposes to replace the cylinder head of prior art engine with a harmonic oscillator that shields the work-piston from explosions and eliminates excessive stress in crank and related parts. The oscillator is explosion driven. It comprises a gun-device, to explode fuel and convert energy released by explosions into kinetic energy stored in a free oscillati ng mass. To prevent heat losses, water injections replaced current cooling in this invention. The heat is preserved in the resulting steam and converted t o extra work. The conversion does quadruple the efficiency, which cuts fuel consumption and GHG emissions in 80%. In addition, the water injections block NOx synthesis.


Improving Mileage in Vehicles (8 pp. doc) - Paper presented by inventor, Kazimierz Holubowicz, at the 24-28 APRIL 2006 ARNO HYDROGEN TECHNOLOGY FAIR (Hanover, Germany). Source: Kazimierz Holubowicz

Abstract : This presentation deals with inefficiency of vehicles. First it presents causes of the inefficiency and then solutions to flagged problems. Finally it presents a transmission free vehicle, the mileage of which exceeds 200 miles/gallon of fuel. The vehicle runs on any fuel including Hydrogen and that is possible as the vehicle uses a novel engine. The novel engine has many things in common with a traditional engine: crankshaft, piston, induction and exhaust evacuation valves, yet it is different. The engine is different since its cylinder is cooled with injections of water. Another difference is that the energy release from fuel is much faster. The speeding up of energy release is through detonations of homogenous fuel, yet a shielding of piston from explosions of fuel, prevents over excessive stress in crank and related parts, as the explosion of fuel acts rather on an additional piston floating on air pocket. Also traditional camshaft and associated gears, to manipulate valves, are replaced with electromagnetic or hydraulic actuators, controlled with an electronic controller similar to that in robotics. The engine could operate in a four stroke cycle during starting and after reaching a preset speed it switches automatically to a novel twelve stroke cycles. Its torque is independent from speed, which eliminates need to employ energy wasting transmission. Also the engine converts heat, disposed in traditional engine through cooling, into extra work. The conversion does quadruple its efficiency. Both, the elimination of transmission and extremely efficient engine contribute to mileage of the proposed vehicle. In addition, a hydrogen generation from water that uses solar panel for electrolysis enhances the mileage above 400 miles/gallon during sunny periods, since the vehicle fuels itself with hydrogen and that costs nothing.

Hydrogen and Fuel Cell Conference in Hannover, Germany, 2006 (link dead) - Page highlighting the pending presentation by Kazimierz Holubowicz.

Paper to be presented by Kazimierz Holubowicz (link dead)


First prototype was destroyed from too much torque to shaft.

Prototyping is presently being done by a professional group in Orem, Utah. -- SilverThunder 12:26, 23 Oct 2007 (EDT)


Hydrogen Ambassadors International Competition - Congratulations to the winning teams of the 2006 Hydrogen Ambassadors Competition fully sponsored by Arno A. Evers and the FAIR-PR Team! (Hanover Fair, '06 Apr. 24 - 28)


Kazimierz (

Stan has come up with around 1500 inventions in his lifetime.

Other renewable energy designs he's working on include a rotary engine that he says could be superior to the Gun Engine. It would have just one moving part.

He has also invented a run-of-the-river turbine that would be super efficient.

NEC Reviews

New Energy Congress comments on Gun Engine.

A fossil fuel engine that is worth some attention

Congress:Member:Kenneth M. Rauen provided the following comment on May 2, 2006.

Wow! This is a fossil fuel engine that is worth some

attention! His basic idea is marvelous! I just wrote

about long dwell time at TDC with the "tiny" engine,

but this addresses the issue MUCH more elegantly!

Though the inventor does not understand thermodynamics

(he did not understand his son's laughter and does not

know why he can get such large improvements in

efficiency), he can get large improvements in

efficiency within classical thermodynamics processes.

Have you ever heard of experimental diesels that get

80% absolute efficiency? Mark Goldes told me about

that one, a prototype made by a retired NASA engineer

who made a ceramic diesel that ran on hydrogen and

oxygen (no air present). I believe it. Peak engine

temperature can be gigantic, and this allows the

Carnot efficiency to be equally gigantic. 3000

degrees F down to 100 degrees F is a Carnot efficiency

of about 85%.

Part of the problem of conventional ICEs is what

happens at TDC. I think it is too confined of a space

for proper utilization of the energy release in the

combustion. Too much heat is lost to relatively cold

metal. Allowing that space to expand rapidly and 1)

convert heat quicker to mechanical energy in the

"bullet" of the "gun" that is later transferred to the

crank at slower speed, and 2) less restriction of the

combustion process can result in better conversion of

the liberated heat of combustion into useful work.

Water injection has been well-documented through the

years it achieves its efficiency boost by moderating

peak temperatures. Higher temperatures result in

higher heat transfers to useless metal heating, so

giving the burning gases more room to stay away from

heat sinks is a great idea in my estimation.

In the News

Gun Engine Explodes Fuel Efficiency - Bon Kulman interviews Kazimierz Holubowicz, inventor of the gun engine, which was designed with the objective of increasing engine efficiency from 20% to much, much more than that. (PESN May 2, 2006)

New Engine Idea to Increase Efficiency and Lower Emissions - We can surely bring in revolution in the transportation industry. Kazimierz Holubowicz has come up with a more efficient combustion engine. Not only environmentally friendly, it is a transmission-free engine and was master-minded at the Lower Mainland. (EcoFriend Jan 14 2006)

Gun Engine {scan, for research}- Canadian inventor, Kazimierz Holubowicz, has come up with an environmentally friendly and transmission-free engine based on the same mechanics as how a bullet is shot from a gun. Initial test results yielded 92 per cent efficiency. (Canoe 24 Hours Jan. 11, 2006) (Thanks Barry Egerton)


See Talk:Directory:Gun Engine

Bourke Engine Also a 'Gun Engine'
Image:Bourke 400 Cubic Inch Engine 100.gif

Gil Walker made the following obsarvation on May 2, 2006

The article about the gun engine is interesting. The "Directory:Bourke Engine" is a GUN ENGINE. The fuel/air mixture is detonated.

Roger Richard has built a working prototype engine, there is web video available. The efficiency of this engine is very high, can use any fuel, and replicates the HCCI engine principles.

: Reply: "I disagree. Detonation is not all that constitutes a gun engine. The inventor is using a free piston as an analog to a bullet, too. If you want to zero-in on the detonation issue, why not call it a bomb engine?" -- Congress:Member:Kenneth M. Rauen (May 3, 3006)

Similar to pulse detonation engine

On May 3, 2006, Jeff Bennion submitted the following by email:

Hi Ms. Haliburton, I read the article you posted from Bon Kulman regarding the "gun engine". [Holubowicz's] invention sounds a lot like a pulse detonation engine, currently under investigation for use in aviation. Here is a good article about if from Popular Science.

The hard part seems to be getting the timing right, and they have a huge noise issue.

: Reply by Kazimierz (May 4, 2006): Surprisingly quiet probably due to:

: 1. Explosions of fuel are contained and

: 2. Valve opens up to release exhaust when little after expansion completed. "The little later" because expansion is below atmospheric pressure to prevent sucking in air. The better expansion is caused by much longer cylinder.


Kazimierz (Stan) Holubowicz

Phone: (604) 525-7917

Email: []

Address: #1208-7272 Kingsway, Burnaby, British Columbia, Canada V5E-4G1

See also


Directory:Bourke Engine

- Directory