The chlorine-hydrogen photoactivated reaction has been known to be a singularity since the 1930s and yes - it is especially violent, but there must be a way to reuse the reactants continuously, since the reaction forms a strong acid otherwise. A fellow named Robert Scragg apparently came close to commercializing this reaction using solar input - since he recognized the problem of continuity. Probably he came closer than did Papp (if chlorine was indeed Papp's secret, which is doubtful since it does not work with noble gases) and this was in the same time frame as Papp (40 years ago).
http://www.rexresearch.com/scragg/scragg.htm The HCl reaction happens once - and AFAIK there is no evidence that it is reversible for net gain - and therefore how can it be useful in a closed cycle engine where one needs continuous explosions at 10-50 times per second? What is a plausible mechanism for returning the hydrochloric acid back to the elements, without attacking the metal cylinder and piston - and at this rapid rate of many times per second in a closed cylinder? Scragg used solar energy with a focusing lens - and that mechanism has some plausibility. The chlorine-hydrogen photoactivated reaction is the only chemical reaction which is known to produce nuclear reactions (when deuterium is used in place of hydrogen). Neutrons are "stripped" from the deuterium in that case. From that detail, one might opine that it is the most powerful chemical reaction in nature, but to use it in an engine, the reactants would still need to be recycled somehow in an asymmetric way, and the engine would become neutron-activated, and radioactive over time. Papp was not known to use deuterium, unless he used heavy water. Are you saying that Papp used heavy water ? If so, where is the evidence? This is not mentioned in the patent. From: Axil Axil https://www.youtube.com/watch?v=NN82GoBG98s <https://www.youtube.com/watch?v=NN82GoBG98s&feature=player_embedded> &feature=player_embedded This is a video of the chlorine - hydrogen ion explosion reaction using high energy photon radiation. This reaction demonstrates the basic reaction mechanism of the Papp engine. The Papp engine uses x-ray and ultra-violet photons to expand highly photo-reactive noble gases to push a piston using ion explosion. When used, the chlorine produces an excimer laser (sometimes more correctly called an exciplex laser). It is a form of ultraviolet laser used in the Papp engine when combined with various noble gases. http://en.wikipedia.org/wiki/Excimer_laser Cheers: Axil
