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IMAC Scratch build Laser 200

Discussion in 'Giant / Scale Scratch and Kit Build Threads' started by Forgues-Research, Jun 27, 2019.

   
  1. It is my understanding that using the graphical method locates the mean aerodynamic chord, from there you need to determine at what percentage of the chord you want to fly at. 15% to 33% is the range that I can remember where the low side would be used for high lift flat bottom type wings and the high end would be used for aerobatic aircraft. Anything above approximately 33% becomes unstable, tail heavy. I built a Hurley Extra 300 many years ago, on the test flight I rolled inverted and it climbed at a 45 degree angle, landing was fun but not really uncontrollable, using down to land is just not normal.
     
    Last edited: Feb 6, 2020
    Bartman and Forgues-Research like this.
  2. Forgues-Research

    Forgues-Research 150cc

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    thank you guys, all these information has made my life much easier
     
  3. Forgues-Research

    Forgues-Research 150cc

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    by putting the power batteries under the cowling as in the photo, I was able to remove the weights which are still in the photo but gone now, Not only balance , but less weight also,
     

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  4. Good work, I hate adding weight to balance as well.
     
    Forgues-Research and dhal22 like this.
  5. Forgues-Research

    Forgues-Research 150cc

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    sorry for the out of sinc of the video and audio, I have no idea how this happened and I have tried 4 times of download and always the same

     
    AKNick and pawnshopmike like this.
  6. Roger,
    Sounds great, what pipes are running!!!! You must have every Frsky Radio made, I see the new blue case. How do you like the roller?
    I'm still using my model B!!!
     
  7. Forgues-Research

    Forgues-Research 150cc

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    Hey Tony, not sure what you mean by pipes, since this is an electric motor. as for FrSky , ya I love them and the little blue one you see here is the X9 Lite , about $70, , 24 channels, open tx . it can do more then any radio on the planet including those super expensive Core, and even the new Futaba 32.
     
  8. Forgues-Research

    Forgues-Research 150cc

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    Testing everything for fit, working properly, like voltage sensors installed and working perfectly in the motor battery compartment, running the motor with this 27*10 propeller but only to about 2500 rpm to check for any vibration so far none, and perfectly balanced and true, as well as the 3D printed spinner, with no issues whatsoever,

    55.jpg
     
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  9. Forgues-Research

    Forgues-Research 150cc

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    testing a rpm sensor from FrSky , seems to work quite well


     
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