Quad racing motors in single motor "prop in slot" Park Jets

Discussion in 'Electronics' started by e3_Scott, May 24, 2018.

  1. e3_Scott

    e3_Scott Top Gun

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    Hi Everyone -

    I shot this video as kind of a wrap up of almost a year and a half of experimenting with quad motors in single motor prop in slot park jets. Much of what I discuss has already been covered in this thread, but there are a few new items I remembered to mention in this video.


    Here is the link to the blog post I mention several times in the video that supports it with links to much more info if you are interested.
    http://scottsparkjetblog.blogspot.com/2018/09/quad-motors-in-park-jets-summary-after.html

    Cheers,

    Scott
     
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  2. e3_Scott

    e3_Scott Top Gun

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    Hi Everyone -

    I had my test rig busy today, testing the "budget/value" Racerstar BR2406 2600 kv motor on 3S with a series of RC Timer electric sport props for a project I am going to be working on in the coming months. Here is a link to the updated motor test spreadsheet which also has links to the motor, props, ESC, battery I used for the testing https://docs.google.com/spreadsheets/d/1KLR_wdkJ1OdGcf5f9jxxxU8qqmz_kXjMQH8NOLjW3NQ/edit?usp=sharing

    These props are also sold by Banggood as KMP and Hobby King as TGS. I was looking for a setup that would be very efficient so that perhaps I could use a 30A or even lower amp/lighter ESC to suit the project. Some very interesting results. I tested 6x3, 6x4 and 6x5 props. The 6x3 on the bench anyway certainly came out the winner for power and efficiency. I tested with the Turnigy Plush 40A ESC on factory default settings. Here are the results for the 6x3 prop, thrust numbers very similar to the 6x4 APC gas prop, but with a noticeable drop in amp draw.

    50% throttle - 10.5A/128.8W producing 498 gr/17.6 oz of thrust;

    100% throttle - 25.2A/295.2W producing 930 gr/32.8 oz of thrust.

    On the bench, the 6x4 was a bit disappointing, producing only 875 gr/30.9 oz of thrust while drawing 29.5 A. The 6x5 prop was strangely very close to the 6x3 prop, producing 940 gr/33.2 oz of thrust and drawing 26.6A. I'm wondering if the 6x5 might have been stamped with 6x5 incorrectly?!

    Anyway, I think the 6x3 prop will be a good choice for the project I will be working on, very efficient power for a budget motor that has plenty of torque and is about 20 gr lighter than a 2212 2200 motor:)

    Cheers,

    Scott
     
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  3. I have found on most motors the TGS 6X3 prop does better all around compared to the APC electric or sport 6X4 prop, just wish they would make it in a reversed option too.
     
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  4. e3_Scott

    e3_Scott Top Gun

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    Hi Everyone -

    Out doing a little field testing with the Racerstar BR2406 2600 kv motor and the RC Timer 6x3 electric sport prop on 3S as discussed in post #22 above.


    As mentioned, I will be hoping to test this in a smaller park jet project I will be working on in the coming months that will be about 10% smaller and quite a bit lighter than the plane in the video above. There was a little bit of heat build up in the 30A ESC, but I think this might be due to pushing the internal BEC pretty hard with six servos as well.

    To lighten things up even more, I am hoping to experiment with a couple of opto ESCs in 20A and 30A with a lightweight BEC to see how those perform. I have already ordered the ESCs and BECs, linked below

    20A opto ESC - https://www.banggood.com/FVT-Little...C-Multirotors-p-1007740.html?rmmds=mywishlist

    30A opto ESC - https://www.banggood.com/Racerstar-...100236.html?rmmds=mywishlist&cur_warehouse=CN

    UBEC - https://www.banggood.com/DC-DC-Conv...981978.html?rmmds=mywishlist&cur_warehouse=CN

    Cheers,

    Scott
     

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