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  1. A

    Electric Hybrid

    Engine weight to electric motor is at least 50% saving.for 2 engine = 5,000 Lbs,CFM56-5A series produces 22,000 Pounds x 2 44000 pounds trust,8000 KW Needed to produce same thrust but at 80% Speed,500 Mph, I have calculated for duct fan with 48in blades 24in pitch at 7200 RPM,SO there will be...
  2. A

    Electric Hybrid

    It looks like a cri cri scaled version with electric propulsion system.
  3. A

    Lower budget engine options for a low budget UL

    https://feixiang668.en.made-in-china.com/product/qXBQiGCbLepj/China-Dle-222-4-Cylinder-Gas-Engine.html
  4. A

    4 mower engines.

    pecifications: Type: 2 Stroke Bore: 55mm Stroke: 42mm Displacement: 200CC Power: 23HP/8000rpm Compression Ratio: 10:1 Reduction Ratio: 1:2.7 Transmission Type: Belt Starting Type: Electrical Start Net Weight (without muffler): 10.3 Kg Premium Muffler Weight: 2.2 Kg Spark Plug: DLE-8A Petrol...
  5. A

    Thin wings?

    It reminds me Of Mr.Mark Stull, Such a great Aviation pioneer who recently left this world, His contribution to this forum is Uncomparable,I was reading most of his posts since long time, specially about his twin boomed UL,and Hirth Engines,The way he reply to each query was very articulate in...
  6. A

    Thin wings?

    One of a off-the shelf electric actuator, light weight,cheap and locally available for you, Mini Linear Actuator (Stroke Size 3", Force 50 Lbs, Speed 1.18"/sec)
  7. A

    Thin wings?

    It will take 2 sec for 6cm linear stroke with load of 200N push or pull,
  8. A

    Thin wings?

    A kind of custom made electric actuator with 6-8 cm movement, With that I can achieve 30 degrees flap angle.
  9. A

    Thin wings?

    Flap Mechanism is electrical most probably window glass geared motor it will be installed internally at wings main spar, I will give you the drawings very soon, And Pitching Movement will be around 30 Degrees,
  10. A

    Thin wings?

    SO I have to limit my flap angle, That is what a pilot has to do use flaps for lift or brakes,
  11. A

    Thin wings?

    Flaps are not used as brakes. Flaps are used to increase and maintain lift at slower speeds. During the flare the flaps change horizontal energy to vertical energy that is used to decrease the sink rate prior to touchdown. Fowler type flaps, as on Cessnas, deflect air downward and the gap...
  12. A

    Thin wings?

    I have compered to an ultralight engine, weight number goes about 40 kgs with prop & reduction for rotax 502, And ZDZ360 with prop comes around 12kgs with every thing included ignition battery mufflers , 28 Kgs weight saving on engine alone, thin wing design will save further 5 kg, and my own...
  13. A

    Thin wings?

    Thanks For analyzing and I made some changes,Kindly advise on this,I would like to design a All metal single seat Aircraft high wing tricycle gear Tractor engine,I have got access to CNC machine,Aircraft will have wing span of 5.4mts and 1.3mts chord,To minimize stall it got 60% span flaps 30%...
  14. A

    Thin wings?

    Check this out
  15. A

    High Lift airfoils for UL's

    Check this out and workout for center of lift for this wing profile,
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