UMX Ultrix FPV | Great FUN but harder to fly than expected | RC-Plane FPV | fpv rc-airplane | FPV

Hello my whoop friends! If you want to convert an aircraft to FPV that can fly very slowly then I can recommend the UMX Ultrix if you have mastered flying in the Harrier. I tested two versions. Version 1 with the camera mounted at the front of the fuselage tip. This means that it barely flew without a balance weight, but you always have to pull the elevator fully, which takes some getting used to. The UMX Ultrix FPV version 1 flies better with counterweight, but you notice the additional weight. It's not bad but if you're used to flying the Ultrix without a camera then you'll feel the difference. And then the difference bothers you. That's why I made a version 2.

Version 1 camera mounted on the front of the fuselage nose

Camera module weight = 5.77g
Camera module + balancing weight V1 = 10.20g
Camera module + balancing weight V2 = 14.45g

0:00 Start of this short UMX Ultrix FPV video
0:56 Version 2 of the UMX Ultrix FPV
1:50 My conclusion from the TestFlights with the umx ultrix fpv
2:31 My recommendations
2:48 My idea for version 3 of the UMX Ultrix fpv
3:28 UMX Ultrix FPV with DJI O4 Lite
4:21 Please note the other videos on my YouTube channel

Version 2 does not require any balancing weight. And the front part of the aircraft in the picture helps to better estimate the speed and the angle of attack. I definitely like version 2 better. In version 2 with only approx. 5-6g additional weight of the FPV system, the UMX Ultrix flies as usual. Only changing the battery is a bit complicated because the FPV antenna gets in the way when you want to turn the plane on its back. And the view forward and below is somewhat limited because the aircraft is partially in the picture. However, for predominantly inverted flying, this version 2 is best.

Version 2 camera mounted in the top center

Camera module weight = 5.06g
Dry weight = 62.22g
Takeoff weight with Tattu 450mah 95C Lipo = 74.69g

My conclusion from the test flights is: The UMX Ultrix also flies very well as an FPV version in calm conditions. However, as soon as there is a bit of wind it is not easy to fly FPV. You have to do a lot of steering all the time and fly with foresight. And it`s very hard to see and feel the wind. It's not quite as maneuverable as a tinywhoop (of course). It takes a lot of experience and skills to fly around the trees in a small park and between houses in an urban area. I cannot recommend this to everyone. There is a big risk that the UMX Ultrix FPV will end up on a tree or roof. But on a windless day in a large park, the UMX Ultrix can definitely be fun. Especially with friends. I would recommend mounting the camera and possibly also the VTX at the bottom center of the fuselage for a better view to the front and below. Especially if you plan to fly more in a normal flight attitude. Together with the original suspension leg. Then the camera doesn't come to the ground when landing.

My idea for version 3 (in the future) Camera mounted in the bottom center
(Because I fly more in a normal attitude than in an inverted attitude.)

Assembling the VTX/camera combo was very easy. The UMX Ultrix has a free servo channel that has direct Lipo voltage. Between 3 and 4.2V. If your camera can handle it, like the eachine TX01 in my case, then you don't need a separate power supply for the camera/vtx combo. If you are interested in flying the UMX Ultrix and in my tuning ideas then visit my other channel where I explain everything I have changed on the UMX Ultrix. The other channel is in German but you can activate subtitles.

   • E-flite UMX Ultrix EFLU6450  

And for everyone who wants to fly the UMX Ultrix with the new DJI O4 lite: I think it's possible with the approximately 9-10g additional weight of the O4 Lite Digital FPV system. My analog version 1 with the balance weight was around 14.5g additional weight during the test flights. And the aircraft still flew acceptable. A voltage booster may be necessary for the O4. You can adjust to a flying feeling that is sufficient with the O4, but not as good as with an analog fpv system with a weight of about 6g.

If you are very interessted in fpv rc-airplanes then you can find more videos here in my fpv rc-plane playlist:

   • MORE FUN than EXPECTED | FPV Airplane Aero...  

Here you can see the UMX Ultriy FPV from another pilot in more calm weather and with a little more speed in a more ideal place to fly:

   • Umx ultrix FPV flight today 9/19/24  


Happy flying my friends!

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