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Ron Try this site for tech info on engines; http://perso.wanadoo.fr/xavier.cardinale/D...ossiers_US.html Dave

Ian Sorry to take soooooo long to get the info for John Hyders tethered hydro 30cc engine but here it is Bore - 32mm Stroke - 31.8mm Exhaust - 185 Transfer - 130 (2 main, 1 boost) Inlet - opens 40 ABDC closes 60 ATDC Venturi - 14.5mm Pipe - 360mm plug to max diam (65mm) 25mm header...

Ian This site has a good description of how to modify props with a plan for a pitch gauge as well. www.shark-racing.com/Ingles/Tecnica/Melhorandoheliceing.htm Dave

TimD / Ian Another Russian engine maker who may be interested in your project Alexander Kalmykov pr.Dzerjinskogo 2-67 Novosibirsk 630112 Russia phone: +7 3832 773771 fax: +7 3832 173278 e-mail: [email protected] Dave

TimD / Ian The gentlemen on this site may be worth talking to www.profimicroengines.co.uk/ Dave

Ian The engine in the hydro you saw was a home built 30cc glow by Lional and held the record at one point. I will try to contact Lional and see if he will give me the specs for the engine. Dave

Ian Lional Lawley has built a tethered hydro fitted with 3 OPS 10cc engines :o :o that were connected with toothed belts however the belts self distructed within seconds of the engines being started. Lional has said he will be fitting a gear train to connect the engines but I have not seen...

Ian I dont know what revs the 30cc engines are operating at but a friend of mine has been building a copy of the record holding engine and has fitted an RF tach so I will let you know when we test it. Dave

Ian 30cc Tether hydros in england are exclusively home built engines. What mag did you see the photo in and did it say who's hydro it was. The record for 30cc hydros is 125+ mph (200+kph) and is a sight to see especially as it took off at one competition and completed 3/4 lap about 5 ft in the...

Tim / all What material do you use to make the anvil of a duplicator ??? Dave

Shawn Try Phills Models in the UK, last time I was in his shop he had one on display, http://www.phillsmodels.com/ Dave

Ian Why did you sell the engine ??? Dave