Electric power for dummys......

Discussion in 'Electric Propulsion' started by MadProfessor8138, Jul 7, 2019.

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  1. Jul 13, 2019 #41

    flyinut

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  2. Jul 21, 2019 #42

    Hephaestus

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  3. Jul 21, 2019 #43

    proppastie

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    Please post some information on the aircraft and performance when you get a chance.
     
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  4. Jul 21, 2019 #44

    RonL

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  5. Jul 21, 2019 #45

    pictsidhe

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    I watched 1/4 of the 1st one and was very unimpressed by his knowledge.
     
  6. Jul 21, 2019 #46

    Hot Wings

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    I got the impression he was just dumbing down the video for general consumption. The rest of it didn't provide any more insight for those of us that have been researching this topic for a while.
     
  7. Jul 22, 2019 #47

    AdvenJack

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    The fellow in the video sure is happy with his THUNDERGULL with Electric Power:
     
  8. Jul 23, 2019 #48

    Riggerrob

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    What many owner/pilots want to know is which motor/controller/battery combination is compatible with their airplane when the current VW, Rotax, Continental engine quits.
    Most of the first production batches will be electric retrofits to existing airframes ..... the same way that the new electric racers are based on Goodyear/Formula One airframes.
     
  9. Jul 23, 2019 #49

    pictsidhe

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    Unfortunately, electric isn't yet suitable for powering draggy aircraft.
     
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  10. Jul 23, 2019 #50

    MadRocketScientist

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    At least not for very long or far :D
     
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  11. Jul 23, 2019 #51

    proppastie

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    I would think given the experience level with this new technology some of those electric installation will be quitting also. Is there anyone selling a proven whole system for our aircraft sizes.....and it seems like everybody wants a different capacity, or weight or power.....which makes marketing a complete "proven" system somewhat difficult.
     
  12. Jul 24, 2019 #52

    pictsidhe

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    A system to replace a 100hp engine just isn't possible without an extremely heavy battery or a very short run time. The batteries are just not there yet. So no, there are no drop in IC replacement systems and won't be for many years. If you want an electric aircraft today that won't make you a laughing stock, you must use a low drag airframe. Think motorglider, or wait another 10-20 years.

    Numbers are always good to get the point across:

    A pretty good (and very expensive) 1000lb battery could supply 60hp for one hour.

    You can wait decades until batteries are way lighter for your aircraft designed around an IC engine, or work with you can get today. Purists may howl. But personally, I like the idea of a hybrid to provide a bit of extra oomph for a few minutes of takeoff and initial climb power.
     
  13. Jul 24, 2019 #53

    Steve C

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    You are spot on. I'm not even sure the Formula electric guys realize how much the battery is going to weigh. It's going to need about 300lbs by my estimate. That's not a huge problem for a new design, all carbon airframe, but for a retrofit that's tough to deal with. You'd just about have to put them in the wing for structural reasons, but for cg that's too far back.
     
  14. Jul 24, 2019 #54

    pictsidhe

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    For the prospective experimenters out there, I just cobbled up a quick spreadsheet to calculate range.
     

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