I want to share our last experience with HYBRiX, a lapse time of a 3hr and 10min endurance flight test. As far as I know it is the longest flight time for a hybrid fuel-electric drone, and I have to say it is not a lab test, but the same configuration we will start selling very soon. We are really excited about this! Please comments ;)

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  • I have published a new post with last news:


  • Hello all, 

    Quaternium will participate in the Global Robot Expo, January 28-31, in Madrid, we will present and launch our HYBRiX20 product. If anyone has a chance to stop by, we'll be there.

    We are finishing 3 units, I will publish some pictures. At the moment Ï show you a render of the product. it is very near to real product, in fact i think real product is prettier!



  • AND, another problem with fixed pitch props is that thrust is directly controlled by speed (in fact, you have ESC) instead of angle of attack in the edge of the prop (variable pitch).

    Thats why:

    - 1st - you need huge speeds for big thrust

    - 2nd - you need huge props for big thrust

    1+2 = Huge speeds with huge props = Tons of inertia and energy lost.

  • Engineer here (and spanish too!)

    Fixed pitch props are not useful because [edge length / thrust] ratio is not lineal, but exponential.

    That's why you don't double the thrust when doubling prop size. Physics rule here :) no matter what RC enthusiast are saying here and there.

    For real heavy lifting, you will ALWAYS need collective-variable pitch. Take a look at a Chinook.

    Hail to Quaternium.

    We are developing a similar system but you striked first ;)

    Keep in touch.

  • @Ouroboros: No, I don't think there are any COTS generator systems that have anywhere near the power density required for a flying hybrid.  In fact, I would be they are an order of magnitude too heavy to work.

    If you want to do this, you will have to roll your generator system.

  • @Andrew,

    could you refer me to algorithm to let me calculate easily

    battery capacity to match lift force x time

    battery capacity vs. lift force x time    - for a drone

    I would like to know if gas powered generator is capable to lift itself if propellers

    are attached and keep flying for a specific time duration.

    Hybrid generator

    gas powered generator  230V or 3-pase 400V >  powering attached 3-phase

    electric motors with propellers, lifting itself in the sky.

    Ok, tethered drone, battery or power supply placed on the ground, if exactly the right

    hardware equipment to test lift force against power consumption ( current, voltage x number of motors).

    I need to know how much energy is consumed by a drone to lift 1 kg of cargo/ minute

    (efficient neodymium motors, efficient inverter, power control unit)

    to let me calculate the mass of gas powered generator, mass of fuel

    it can afford to lift as hybrid drone.



  • An amazing project!

    However, I'm recently playing with a smaller long endurance build and I'd think that at 67" prop size you could achieve 3 hours and more with just standard electric batteries.

  • Developer

    Looks great.  Love to get the logs from the pixhawk for the 3h 10min flight!

    Thanks, Grant.

  • Developer

    Very impressive!  Congratulations!

  • For reference, are there any small scale generators that run on straight gasoline or diesel (or maybe kerosene) that would appropriate for a quad? Two stroke gasoline generators are attractive from a weight standpoint but preparing mixed fuel is a bit obnoxious. Or does that push into turbine/turboshaft/turbogenerator territory?

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