John.Roo's Recent Activity

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  1. John.Roo replied to the thread Why Gas Engines Are Far From Dead - Biggest EV Problems.

    Sport electric aviation has only one problem - price of batteries. I am not here to convince pilots to fly with electric airplanes. I...

    Feb 27, 2020 at 2:28 PM
  2. John.Roo replied to the thread Experimental sailplane self-launch electric conversion.

    And when all works perfectly you can e-fly wherever you want :-) [MEDIA]

    Feb 27, 2020 at 1:39 PM
  3. John.Roo attached a file to the thread What do you think about "e-soaring"?.

    Here is more detailed description of the complete flight :-)

    Feb 27, 2020 at 1:37 PM
  4. John.Roo replied to the thread What do you think about "e-soaring"?.

    [MEDIA]

    Feb 27, 2020 at 12:22 PM
  5. John.Roo replied to the thread Experimental sailplane self-launch electric conversion.

    Every controller has some basic parameters. For example - controller with max. 120 V / 280 Amps. 120 V is max. voltage - not nominal. So...

    Feb 27, 2020 at 5:03 AM
  6. John.Roo replied to the thread Experimental sailplane self-launch electric conversion.

    I don´t know what glider are you modifying, but two recommendations: 1) don´t use belt, go direct 2) prop on mast = more drag =...

    Feb 26, 2020 at 6:12 PM
  7. John.Roo replied to the thread Experimental sailplane self-launch electric conversion.

    OK, reality.... During flying with my D-14 project I have been using 33 kW motor from Rotex (custom made). Controller MGM 280 A / 120 V....

    Feb 26, 2020 at 6:00 PM
  8. John.Roo replied to the thread What do you think about "e-soaring"?.

    Answer to your main question is not that difficult - I cannot make a KIT of two seater for 20-25K USD. I see as challenge to make...

    Feb 26, 2020 at 4:59 AM
  9. John.Roo replied to the thread What do you think about "e-soaring"?.

    You are right, unfortunatelly I don´t have as much time as I would like to have.... But I have some ideas how to make nice simple one...

    Feb 25, 2020 at 3:58 PM
  10. John.Roo replied to the thread What do you think about "e-soaring"?.

    In Germany is category LTF-L with EW up to 120 kg and seems that this category comes to be more and more popular every year....

    Feb 25, 2020 at 3:55 PM
  11. John.Roo replied to the thread What do you think about "e-soaring"?.

    Really sorry, but that is not possible for two seat version. Realistic MTOM for two seater is 550-600 kg. Beleive me that I will not...

    Feb 25, 2020 at 3:34 PM
  12. John.Roo replied to the thread What do you think about "e-soaring"?.

    Well I don´t have a problem to supply a KIT of Phoenix :-) And can be version with fuel tanks (2x 50 lit) or with battery holders...

    Feb 25, 2020 at 3:30 PM
  13. John.Roo replied to the thread What do you think about "e-soaring"?.

    Dear friends thanks a lot for many interesting informations. So I see three main requirements: 1) low price 2) L/D not that important...

    Feb 25, 2020 at 4:49 AM
  14. John.Roo replied to the thread What do you think about "e-soaring"?.

    OK, so if battery is a part of EW, than is really challenge. Available power... Min. battery size I have been using for flying was 5,5...

    Feb 23, 2020 at 5:12 AM
  15. John.Roo replied to the thread What do you think about "e-soaring"?.

    Exactly - just reflections :-)

    Feb 22, 2020
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