02/24/2025
Cyclone Power Technologies, Inc. – History and Update: February 2025 - Pictures at Bottom
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Before inventing the features that make the Cyclone engine so desirable, Harry Schoell’s innovations included faster, more stable boat hull designs that would plane out sooner and with less horsepower than existing designs, developed and built at his Schoell Marine facility, founded in 1967. Schoell also designed and patented “Surface-Drive Propellers” and Pulse-drive propellers for efficiency improvements, and has nearly 50 patents to his credit.
The Cyclone Advanced Rankine Cycle engine has been in research and development for almost 20 years. Cyclone has held over 30 patents worldwide on its technology. The engine technology has evolved and matured, thanks to the pioneering work of inventor and Cyclone Chief Technical Officer Harry Schoell), along with the support of many past and present investors, staff, and technical advisors.
The proof of concept was a single cylinder engine tested and run on several fuels. The next hurdle was technical 3rd party validation, which the engine design received from Oren Masory, PhD and Homayoon Amir Abtahi, PhD, professors at Florida Atlantic University (thermodynamics and mechanical engineering), on October 26th, 2004.
Their evaluation concluded that the design could lead to higher overall efficiencies, utilize a variety of fuels with low pollution levels, conventional lubricants would be eliminated, the engine’s combustion chamber is innovative, the centrifugal design for airflow and condensing is promising, and the compact design has potential for a variety of mobile and stationary applications.
Cyclone Power Technology LLC, was formed, and on September 14, 2005, Harry Schoell filed for the U.S. patent on the Cyclone “Heat Regenerative Engine”, and R&D began. Over the subsequent years, Cyclone evolved and tested three basic engine designs: The WHE (Waste Heat Engine), The “S” Series Engine (Spider Engine), and the Mark (Mk Engine). Although the basic engine design and functions remain the same, the latest Mk-(1 thru 10)-B engine designs incorporate the continuous R&D and associated advances in materials and design, successfully producing significant efficiency improvements and reductions in the number of engine moving parts, increased durability and engine life, and lower manufacturing and maintenance costs.
Cyclone has received many awards and accolades for its Cyclone engine, including Society of Automotive Engineers (SAE) 2006 and 2008 Tech Awards and Popular Science Invention of the Year in 2008. A sample of these awards and accolades are pictured below.
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In 2014, the 15hp Cyclone S-2 was successfully incorporated into a 10kW genset for the US Army. The following is an excerpt from an article published by Karl A. Petersen [then Vice President of Product Development for Cyclone], in the Steam Automobile Club of America’s Volume 28, No. 5, September – October, 2014 issue of the Steam Automobile Bulletin, documenting the success of that project.
“POMPANO BEACH, FL, May 29, 2014. Cyclone Power Technologies Inc. (OTCQB: CYPW), developer of the all-fuel, clean-tech Cyclone Engine, announced that it has successfully delivered its prototype S-2 engine and auxiliary power unit (APU) to the U.S. Army / Tank Automotive Research, Development & Engineering Center (TARDEC), in full satisfaction its $1.4 million development contract with the government.”
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Cyclone successfully met the objective of the TARDEC program to develop a Phase I prototype of a highly compact (12” x 12” x 17”), lightweight 10kW power generator, driven by Cyclone’s 15hp multi-fuel-capable external combustion engine.
As part of the delivery, the Cyclone powered APU ran at the TARDEC test cell outside of Detroit, MI while connected to a fuel supply and an electrical load cell. Representatives from TARDEC confirmed that the system met contract requirements.
These following photos are of the delivered genset getting the final checkout before boxing it up to take to TARDEC.
None of the components could be bought off the shelf; not the pumps, atomizing air compressor, coilstack, engine parts, feed pump, flat plate condenser/radiator, alternator. Because this was a “Development” program, it meant that most of these items were designed and tested and optimized and built again, several times. When this technology is compared with others, it is clear that even after 400 years of steam power and 100 years of Internal Combustion engine development, there is no other 10kW genset available of the same size or weight - which will run on multiple, mixed, gaseous, liquid, and solid biofuels - does not need hydrocarbon lubrication filled and changed, - is a fully condensing closed cycle, and could be converted to produce Zero Carbon Power from Concentrated Solar Thermal Energy.
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– An interview with Harry Schoell (2-23-2025)
In 2025, Harry Schoell continues to work in the Cyclone R&D facility in Longview Texas, developing this Advance Rankine Cycle Technology with limited funds. Here is Harry’s response when asked. “What was the biggest challenge to date?” His response follows:
“Working on the S2 engine with a great team was a pleasure. It was put through by Dr. Phill a great guy and believer in Cyclone. He got the program approved by a Democrat Senator in Florida. It would have been a real innovation having a clean, multi fuel, light weight, and small generator for the military. (Later we saw the huge bulky diesel that was accepted.)
We started the project contract with no government money coming. Lucky enough we had a friend, Congressman Allen West, Republican, who came to visit. We told him of our plight that we were working on the project with no payment. He said it was the bureaucracy. He got on the phone right away and made several calls. That is what it takes. We started on the project. When we were near the delivery date there were a number of layoffs occurring at TARDEC, Obama was cutting back on government. During the project we had visits from people from the government that came to inspect our work and accounting that was well done. We had a good relationship them, however they were let go.
At this same time, we were working on the Raytheon submarine engines after some very successful tests. They were pleased and were planning to put in a dyno room in their facility. We were contracted to build two Mk5 sub engines.
The S2 generator was completed on time and was loaded up and we delivered it to Detroit at TARDEC. We had a meeting at General Dynamics there in Detroit at their request, they were interested in the Cyclone engine. They were also laying off some people.
We showed up on time at TARDEC to demo the engine, and this is where it got weird. We were met with a very young man who was in charge of the project. ‘Oh, you are here, we will have to find a place to put you.’ We asked for a place to run the engine, and he took us to a room that had a closet size room with a glass door with no ventilation. OK, I went in and ran the engine. It was a successful run. We had a meeting about the project where they said little. I observed some weird looks from other people there. I now know what it was, they knew it was canceled before we got there. I still do not know how we were notified.
The Raytheon sub engine was on the dyno when I got a call. They said the project was canceled, put the engines in a box and ship them.
We only learned a few months ago that Obama was in a debate with Romney about a law that Obama passed that all cars should get 55 miles to the gallon by 2025. Of course, Romney said it
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would not happen, and Obama said ‘What do you think you can do it with a steam engine?’ The press countered him with, ‘…did you know you are sponsoring a Cyclone steam engine in Florida?’ This flooded the internet! We were black balled and the phone quit ringing.
Frankie and I put everything into this without a pay check, and we continue to do so! The engine has continued to develop beyond the original. I want to thank our friends who understand this and have continued to help.
Thanks again, Harry” Harry cell 954-610-0910 or [email protected] – Dennis – [email protected]
The Cyclone R&D Facility in Longview Texas - BELOW
In addition to the engines described above, the Cyclone engine technology feasibility has been demonstrated with other small prototype engines operating on dynamometers and in engine/generator applications. Engines designed and built (shown below from left to right, include the waste heat engine, the Genie, and the original Mk-5.
Cyclone Power Technologies, Inc. – History and Update: February 2025
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