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  1. Urquiola

    Resurrecting the Dyna-Cam

    How similar are difficulties in DynaCam and INNengine and other Axial/ Barrel/ Waving plate engines?
  2. Urquiola

    Moni Motorglider

    It seems an 'A' tail unit induces a nose up force, always indesirable, but in a Foreplane, Canard position, it will have the good nose down trend. Blessings +
  3. Urquiola

    Ducted fan aircraft

  4. Urquiola

    Ducted fan aircraft

    About fans, you could try locating D R Valeriu in Romania, they were preparing facilities for making composite fans on demand. Perhaps also micro turbines inside channel, the 'Trompe' style, would increase efficiency; late Pulsejet designs would make the task inside channel, heat of outer duct...
  5. Urquiola

    Could you design anything stranger?

    Hallo!: About the Eshelman 'Flying Flounder', actually a workup of patents US2167143 andUS2303713, by R J Thompson, see the I'm still lacking the 'Span' and Length info. For building one of this, I'd make some changes: Give lifting surface some dihedral, to avoid flat stone on a lake type of...
  6. Urquiola

    Single Tube Fuselage idea

    About Canards, besides the Burns document: 'Canards, design with care', and the Anti-Rutan french document I translated, and already sent here: 'Des couacs chez les canards', 'Kwaks among ducks', the attached image from french 'Aviation Magazine', about foreplane positions in Saab Viggen, always...
  7. Urquiola

    Why battery-powered aircraft will never have significant range

    I'm confused: 'Sagitta' was a Delta Wing Planform supersonic machine in the Airbus portfolio, they added a third central dorsal fin from the NASA lifting body experience, there is a NACA document in the Cranfield repository about ogival leading edge wings with fins. Regarding Hybrid or electric...
  8. Urquiola

    Boeing - Design Issues...

    Having info about Boeing conflicts with their machines and with the FAA is interesting, but it's not exactly 'Homebuilt Aircraft&Kitplanes' Blessings +
  9. Urquiola

    X59 supersonic experimental aircraft

    This rule actually banned Concorde from flying over USA, but this was not the aim, or can't be shown it was, the damages from Sonic Boom seen with data gathering experiments were of enough dimension as to ban this type of civilian supersonic flights over land. The Boeing SST is still in the...
  10. Urquiola

    Lighweight opposite 2-stroke engines

    Advantage of Single Sleeve Valve, Burt-McCollum, Bristol type, I have no actual data for Piccard-Pictet rotary sleeve valve, is: better breathing; reduced mechanical losses when motored respect to Popett Valve engines; very low servicing needs, TBO 3000 hr, from the elimination of...
  11. Urquiola

    Lighweight opposite 2-stroke engines

    Low wear, no points without lubrication in TDC, BDC, is also a great advantage of Single Sleeve Valve engines, TBO 3'000 hr in Bristols. Continental reported Sleeve-Valve engines were easier and cheaper to build than popett valve engines, but they never produced one in series. Besides RCV, no...
  12. Urquiola

    Lighweight opposite 2-stroke engines

    Probably, main cost in fuels is taxation, not oil and refinery costs, you could buy benzene and other toxic liquid raw materials in a hardware store, a druggist, mix it, and start running your engine for a low cost, but they could put a fine on you, at least in Europe. Dreamin' is free, but not...
  13. Urquiola

    Lighweight opposite 2-stroke engines

    There is recent SAE info that Schnuerle, Loop scavenging, is better under any circumstance than Uniflow scavenging in 2-Strokes. Nothing achieved better SFC than the Compression Ignition, Open Sleeve, sleeve acting as an annular piston, sending power to crankshaft via sleeve drive, 2-Stroke...
  14. Urquiola

    Lighweight opposite 2-stroke engines

    There were italian companies offering Turbocompressors for the Vespa Scooter 2-Stroke engines. The EFI is interesting, are you aware of small size turbos? Ecotrons had some Japanese turbo replicas, but don't know if they sell it now. My anti-spyware program blocks accessing their site. Blessings +
  15. Urquiola

    Lighweight opposite 2-stroke engines

    Thanks. The name 'One/ single stroke' was chosen by INNengine for marketing reasons, to differentiate from other engines. It corresponds to nothing but propaganda. The Wikipedia 'Axial Engine' article is quite informative for me. The 22 HP INNengine motor is a 2-Stroke, with four air cooled...
  16. Urquiola

    Lighweight opposite 2-stroke engines

    The 125 cc4 cylinder INNengine is a 2-Stroke, the car engine, with opposed pistons, is not exactly same. It seems they had scavenging, BMEP issues with the car engine, but the 22 HP ultralight aircraft engine was actually tested. 5 kg for 22 HP, it's great. About wear, I can't see a reason...
  17. Urquiola

    Most Beautiful Aircraft Ever Built

    'Al Bentley Drawings' offers for sale the Ho-IX/ Go-229 structural plans, not construction plans, and many more. Blessings +
  18. Urquiola

    Ducted Fan Pseudo-Jets

    Hope this time the document is uploaded, sorry for inconveniences
  19. Urquiola

    Ducted Fan Pseudo-Jets

    This late Argus-109 Pulsejets, could put the Airplane at an adequate airspeed for a Lorin RamJet to work, (Lorin Ramjet full text in Scribd) is a good approach to low cost high-speed propulsion, you could even consider a remake of DM-1, Lippisch L-13, as tested at Langley, with the originally...
  20. Urquiola

    Advantage of parasols?

    This is wild! Min 06:50 in Video. Please notice Airplane in the two images is not exactly same
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