SES 1974 (Steam Powered) Dodge Monaco Royal

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Kimmel Collection: SES 1974 Dodge Monaco Royal

SES used to be Steam Engine Systems and then became Scientific Energy Systems to make it easier to raise money from investors. Many good engineers worked on this project for about seven years. The money and the project parameters came from the EPA.
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Therefore, the rules were very difficult and much of the work had little to do with making a good and practical steam car. As an example: everything had to fit under the hood, it had to be able to condense all of the steam even under the most extreme driving conditions, it had to withstand a month of freezing weather, it needed to be competitively powered, meaning at least 150 horsepower.
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The other rules were equally interesting. For legal liability issues the vehicle was never to run on a public road. Thus all of the tests were done on a chassis dynamometer. The most important part of the project was the successful generation of quarterly reports for the EPA.
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When this was all done and successful the 1973 oil embargo raised the price of fuel and thus the political winds, the ones that had been blowing strongly from the clean air/anti-smog people, changed to fuel economy. For fuel economy a much smaller engine was needed as the purpose was then no longer one of matching muscle car performance while being clean burning. A full sized car needs about 30 hp to maintain freeway speeds on a level road and twice that hp to maintain freeway speeds going up a moderate grade. The SES Dodge had an oversized engine and a boiler (steam generator) that had large air side and water side pressure drops in order to make it compact enough to fit under the hood. A steam car could have been made with reasonable and practical fuel economy; the Jay Carter VW conversion is a good example of that, if that had ever been the goal and if all of these other completely unnecessary rules not been in place.
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As it was much engineering time and talent was wasted trying to fit everything under the hood, trying to achieve freeze protection, and condensing all of the steam. When going up a hill in Death Valley when it is 120 degrees F the cooling fans absorbed half of the horsepower generated by the steam engine, just to give some example of what the developers were working with.
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The engine was developed by Ricardo in England and is a four cylinder uniflow poppet valves with two intake valves in series with a phase changing camshaft drive that gave complete cutoff control so that throttling was not needed.
 
and the other site i found

SES 1974 Dodge Monaco

Steam Engine Systems and later Scientific Energy Systems was a company founded by three PhD’s from MIT to work on steam projects in the late 1960’s. The flurry of activity then was caused by smog and air pollution issues that had become important political issues, hence causing politicians to scramble about trying to solve things. The car represents $7 million of EPA money and seven years of work by a very skilled team. It fulfilled the terms of the contract, running on a chassis dynamometer while producing clean air. It never drove on the road.

The boiler, or technically more accurately named, the steam generator, is very small and it fit into the empty space under the hood. It exists and is one of the most marvelous examples of a compact steam generator. Every possible engineering ploy was used, starting with very high air-side and water-side pressure drops and a vaporizing blue flame burner for compactness and finned tubing.

The four cylinder engine was designed by the Ricardo group over in England and also represents quite sophisticated engineering. The intake valves are poppet series valves with phased camshafts so that steam was only admitted when both valves were open. The reason for this design decision is because an efficient steam engine needs to be cutoff controlled for torque and not throttle controlled, where many energy losses occur. A conventional automobile IC engine cam and poppet valve system does not work in a steam situation because of the steepness of the cam shoulder needed to operate a steam engine. Huge forces were at work.

When you look at this car and the amount of engineering work that went into it, one comes to several conclusions. Or, at least, I came to many conclusions; most of them involving wasted effort and missed opportunities. Because it was a government specified project there were a lot of pre-set rules. Because it was a government project most of the rules were unnecessary, counter-productive, and wasteful. The rules were to make a steam engine that fit everything into an existing production model automobile engine compartment, to have all of the conveniences of a modern car: automatic transmission, air conditioning, power steering/power brakes, and to be able to condense all of the steam under any possible driving situation.

Another big waste of time and effort was to make the car freeze-proof with the requirements being that it could be parked at an airport where it was 30 below for a month and then started up. Therefore water was drained to a pan where it could be thawed by battery power. A much better method of achieving this goal would be to do what everyone in Alaska does with their IC cars and what all semi truck drivers do with their diesels; which is to plug them in to an outlet so a heating element can keep their engines warm. Another method would be what Saab proposed for their steam project, a small pilot light in an insulated engine compartment.

When the car was finished the 1973 oil embargo sent the price of fuel up and so all steam development work was dropped in favor of higher mileage vehicles. This is what happens when politicians are in charge of financing engineering development.

The opportunity missed was to do a steam power plant development in and of itself to make a compact and efficient unit. The first units did not need to be so consumer friendly that any non-technical person with no training could operate the vehicle and they did not need all of the power auxiliaries and they did not need to be completely condensing. At the worst possible conditions; climbing a hill in Death Valley in the summer, the cooling fans for the condenser, which were variable speed, consumed half the horsepower the engine produced. A few five gallon cans of water in the trunk and some basic mechanical knowledge of how to pour liquid into a tank would have solved a lot of those problems. Also the cramming everything into the engine compartment was completely unnecessary. To begin with shortly after this time mini-vans were invented and they had much more flexibility in the location of power plant units. Secondly, a steam power plant has the intrinsic capability of separating out all of the different components: burner, heat exchanger, condenser, expander, and pumps into small components tucked into odd places around the vehicle. Thirdly, the first use of a steam powered vehicle is more likely a pickup truck where much could be placed in the truck bed or under the chassis and not in the engine compartment. Fourthly, the most practical threshold use of a steam vehicle would not be a personal vehicle that only puts on ten thousand miles a year or so, but a high mileage vehicle where the extra expense of the steam system could be amortized quicker.

Therefore, a delivery van of some type or a small passenger bus, that had a lot of stops and starts and was running all day long and generally operating out of a central dispatch center where servicing and fueling could be done daily, would be much more practical as an entry level steam vehicle. The SES Monaco should be studied as a successful steam development project. It should also be noted that most of the engineering effort was wasted because of unreasonable specifications of the contract
 
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