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    how simple is this?

    Carl Goldberg invented the technique.
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    Could you design anything stranger?

    I actually met Paul Moeller back in the early 80’s through a third party. He wanted a hot shot RC pilot to fly one of his early designs without supporting safety wires. His design at that time use entrained air as a method of increasing lift. What he really wanted was someone to do a lot of...
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    Parts Wanted Wanted: Graham Super Midget Plans

    Wasn’t the Polan Special also based on the MM?
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    40 + MPG Air and Auto Vehicles

    A guy I worked with at a couple companies built a motorcycle for a mileage event while he was in college. The challenge was to go 55 MPH on 4 Oz of gasoline, so he built a streamliner out of fiberglass with a 125 cc engine, tall gearing, and the carburetor from a 50 cc engine. He managed a bit...
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    Hydrogen generation use and storage.

    Image that, I thought the term Cosmic implicitly implied that. https://link.springer.com/article/10.12942/lrsp-2013-3
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    Hydrogen generation use and storage.

    The next ice age was the concern in the 70’s, during the last one which lasted about ten time longer than the brief warming period we currently enjoy, left the world’s population at a meager million or so. These cycles happen like clockwork meaning it has more to do with external influences...
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    Hydrogen generation use and storage.

    The majority of natural gas is CH4, which is abundant and not called Ethane, but is correctly called methane. While the Brits tend to call it Me-thane, Yanks know it as Meth-thane. Because it is a gas and not a liquid, it is easily used in stationary applications. Of course with the correct...
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    Hydrogen generation use and storage.

    I use on average about 8,000 gallons of diesel a year for the tractors, sprayer, combine, and semi’s to farm nearly 3000 acres of corn and wheat. The equipment is large and very efficient. The sprayer uses maybe a tenth of a gallon to spray an acre, a tractor pulling a 24 row planter well...
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    Hydrogen generation use and storage.

    Our entire vehicle system is based primarily on liquid fuels. Contrary to the noise from big oil, ethanol works well in virtually any car produced the past 20 years in blends up to 40%. Testing has shown that E30 hits all the marks, of higher power and lower cost. Perhaps the worst idea that...
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    The rise of FrankenEngine - An engine for the VP-21

    I am curious why you only mention an odd number of cylinders for a two stroke engines?
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    The rise of FrankenEngine - An engine for the VP-21

    Interesting thread, though it seems like the problem of powering light personal single seat planes goes back decades. After it is all hung out to dry, cost is a major factor as well too low of a power to weight with the current crop of available engines. The two ideas that seem to have the...
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    Basic Configuration for a "Safe" airplane

    The safest plane may be the Cub. It can just barely kill you.
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    Moni Motorglider

    At that size, Robart almost makes retracts that would fit.
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    Can Dihedral wing Angle negate the need for Ailerons

    Back in the mid-60’s radio control had what they called Class II models for competition with rudder/elevator/motor for a control system. Marvelous flying models, about the only thing they couldn’t do was knife edge flight. They rolled quite well and could fly inverted for as long as you wanted...
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    Can the secret of dragonfly's Ornithopter wings be capitalized?

    Interesting video. While I doubt that flapping wings will penetrate the passenger market, I do think that vortex interaction offers possible efficiency improvements. For instance, a dragonfly can lift seven times it’s own weight. Years ago, I flew a semi-scale Rutan ATTT model that floated...
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    Van's announces highwing RV-15

    The Hollmann Stallion from 30+ years ago was based on the Lancair 4 wing with a very high wing loading. It’s stall speed was very high and it was designed for speed not lifting ability. About the only attribute it shared with a 180 was the high wing placement. Back country infers landing on...
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    Van's announces highwing RV-15

    I expect a refined 180/182 with either the 390 or a 540 option.
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    An airplane for the modern homebuilding enthusiast

    I used to watch NASA fly one of these quiet planes out of Moffet trailing helicopters when they were working on quieter rotor blade designs. Back in the 80’s.
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    Looking for best way to level airplane.

    Unfortunately the tubing volume changes with the amount of head since the plastic tube expands under slightly increased pressure. So if you mark a couple of lines when a foot off the floor, the water will no long reach the marks when 7 feet in the air.
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