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  1. lehanover

    Jet fuel rotary?

    Mistral had one running just fine on Jet-A. They are now back in business working on the gas version trying to get it cirtfied. Rotaries run well on very low octane fuels. In normally aspirated form they resist detonation with a long cold combustion chamber. Boosted rotaries act more like piston...
  2. lehanover

    Rotary diesel?

    The Britich developed a very nice diesel rotary using a large displacement rotary as the compressor and a smaller as the diesel engine. Much too heavy for aircraft use. But serviceable for stationary power. Lynn E. Hanover
  3. lehanover

    Billet Aluminum Rotors

    There are two down sides. The expense, and the loss of mass. The stock rotors are cheap and weigh about 9 pounds each. That provides a considerable flywheel effect. For a smooth low RPM idle you will need a heavier flywheel. Cast iron rotors are nearly indestructible. Are available in every...
  4. lehanover

    Question for you welders..

    The Dillon/Henrob is just a medium aircraft like handset, with a pistol grip and a shield to protect your hand from the heat of welding. It adds only novelty to the welding mission. There are some situations where this handset will help you reach inside of some structure, where a conventional...
  5. lehanover

    Question for you welders..

    Old fasioned gas welding will do very nearly every job there is to do. Not far back all aircraft made of tubing were brazed. My mother gas welded aluminum tanks during WWII. Race cars from England were brazed together, including the rollover structures. I gas weld 4130 roll cages, and drape each...
  6. lehanover

    Torsional Dampening

    When you start dynoing engines, it becomes obvious that a mass of sypathetic harmonics will hunt you down, and damage your equipment. The first thing I noticed was that the grease was flying out of the needle race in the universal joints at each end of the drive shaft. In 4 cylinder piston...
  7. lehanover

    Torsional Dampening

    The rotary has little torque, as the output is geared up 1:3 from rotor speed, so a reduction unit between 2:1 and 3:1 is used. Where a piston engine actually sees reversals in torque, and requires extensive damping, the rotary has only positive going torque pulses, and has less complex damping...
  8. lehanover

    Compression

    The conventional aircraft engine with poor heat control, and poor mixture control, can be detonated (even with low compression ratios) by anyone willing to lean it too far at wide open throttle and too low an RPM. Typical take off power includes well over rich mixtures, to eliminate detonation...
  9. lehanover

    Cog Belt PSRU

    The belt drive from "Belted Air Power would work fine. Also Ken Welter at "Rotary Coot sells a number of ratios for his belted reduction system. There is another made in the northwest but I forgot the name. Use the Google search engine to find what you want. Lynn E. Hanover
  10. lehanover

    Benefits and drawbacks of a rotary

    Entertaining Well, the enthusiasim is here if not all of the data. I have been racing rotary powered cars since 1980. I have produced, through ignorance, a small list of failures. A very small list. The rotory is only smooth at idle (in stock trim) because of the weight of the...
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