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  • Air in  and air out..as finicky as the pixhawk is already is, I would not want to make it over heat!! 

  • 2 big holes on the top cover above the battery compartment either side of the red button now filled. I blocked these off on the front only using plastic from a disposable food box and leaving vents on either side. I also added another status light making it rather bug like. Have been flying this for a while and no tempissues so far. See attached image3702025459?profile=original :-) 


  • Has anyone had issues with props making noise and loseing lift when yawing?

  • Can't edit my comment but I meant the vents in the bottom of the shell need some place for the air to exit.


  • @ David,

    In the first edition of the IRIS the telemetry radio hung out the back.  On the IRIS+ they fixed that by adding the antenna hole on the side.

    As far as blocking them off, I wouldn't necessarily completely block them off as the vents in the top of the shell scoop the air (while in flight)  and the air needs to exit someplace.  I believe that the general rule of thumb is to have the exits 2x as big as the entrance.

    Also, 3DR experimented with placing the video Tx back there as well and those tend to get a little warm.  Now the suggestion is for the VTx to be velcroed to the bottom shell behind the gimbal.


  • So why 2 big holes on the top cover above the battery compartment, either side of the red button.They are OK and could be used for routing cables etc. but spoil an otherwise nicely designed unit. Is there a reason i shouldn't fill them in?


  • Just bought iris+ from Frys, gimbal will not power on, no shakes, no blue light, no nothing. 2nd iris I bought in 2 weeks, 1st on works fine. Help!!
  • I've broken my front GoPro mount that attaches to the IRIS+ frame, does anyone have a spare or link to a seller?

  • You are confusing Almanac data with Ephemeris data. 

    It is true that Almanac data takes 10 to 12 minutes to down load fresh data.

    But Ephemeris data is broadcast by each SV every 30 seconds.

  • A cold start of any GPS requires that current ephemerids have been downloaded to the local GPS receiver. Each satellite sends its own ephemerids. The ephemerids contain the coefficients that allow the receiver to determine the satellite position. Ephemerids are transmitted with the coded L1 signal at 50 baud.

    All this means is that a cold start GPS may take 10-12 minutes to download a complete set of ephemerids. IF the satellites are visible.

    The Iris's Pixhawk and GPS can function and communicate find with the the 5v USB connection. Take the Iris and a laptop outside, plug the Iris into the laptop, open and connect to Mission Planer and observe the GPS.

    The PDOP (position dilution of precision) value is what is used to determine if the position solution is good enough for flight. Lower is better. Going from memory, the stock value is 3.0.

    Think of PDOP as the inverse of the volume of a pyramid described between your position and each satellite. The complete sky would be 1. A view of the sky blocked by trees, buildings, or mountains will reduce the volume available.

    Coeur d'Alene has a couple little hills around. You may have to move to Wyoming. Kidding, I'm in West Virginia, the PDOP limit can really hurt flying in and around our hills and trees, so I've modified the stock parameter. But wait until you gain some flight experience before modifying.

    * Spelling and grammar, though well intentioned, may have been inadvertently assisted by my iPhone while enjoying some great Bluegrass at MerleFest in 70 degree sun and a light breeze.
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bad crash last Saturday - can someone here read logs and analyze ?

well today just wasn't my day.I wanted to video some today of a lake near here that is soon to be refilled after the dam was replaced for the 2nd time. I preflighted my IRIS+ and even flew it around the yard some, it operated flawlessly. so i got ready and went to the lake. I put in my battery, waited for the IRIS+ to give the green light.i took off, flew around the perimeter of the lake some, and then headed offshore ( no water yet, just the streams ) i get about half way over the lake and…

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Iris + won't arm

I have an Iris + using a Spektrum satellite and DX9 radio. I can only get the Iris to arm and motors run when the Iris is connected to my computer via USB (plus with LIPO plugged in of course).If I go through this procedure without the USB cable attached, The Iris will initialize, LED will blink green, safely button pushed, stick right down on radio, LED changes to yellow and alarm goes off. It will also turn from blinking green to yellow without attempting to arm if I just leave if for a short…

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Iris+ Tarot gimbal camera compatibility

Took Iris out for some flights yesterday and still flies great.  But the USB port on my GoPro 4 Silver seems to have failed for charging and data transfer... but strangely still worked for Iris+ FPV.  So the battery is dying and who knows how long the FPV will function even if I get an external battery charger.Question: are there any other cams that are compatible with the Iris/Tarot setup?  I am reluctant to get another GoPro 3 or 4 since they seem to have fragile USB ports... and I don't…

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4 Replies