AlfaRC Apache 5-inch build

By KristofFPV on Aug 12, 2019

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5-inch budget build. Durable, smooth and stable flight.
The frame is AlfaRC Apache 230mm, modeled on GEPRC GEP-KHX5 Elegant. Engines, ESC, FC, camera and VTC are part of the Eachine Tyro109 model. Flysky 8ch receiver. Noname 5040 propellers, supplied with the Tyro109 set.
First of all, the frame is very durable and protects electronics inside. The copter weighs approx. 375g without batteries. I already had some serious accidents with it and survived them without damage, with only bent propellers.
The total cost is around USD 130.

Photos

Part List

Frame	US $4.5 \|AlfaRC Apache 5/6/7 cal FPV rama z włókna węglowego 230mm 260mm 290mm rozstaw osi dla DIY Quadcopter dron wyścigowy Pl.aliexpress.com	See Site
Motors	4 x US $8.99 \|Eachine Tyro109 210mm wersja DIY RC Drone części zamienne 2206 2400KV 3 5S silnik bezszczotkowy pilot zdalnego stero Pl.aliexpress.com	See Site
FPV Camera	US $13.99 \|Kamery FPV Caddx Turbo EOS2 1200TVL 2.1mm 1/3 CMOS 16:9 4:3 kamera Mini FPV Micro Cam NTSC/PAL dla RC Drone akcesoria (2 builds) Pl.aliexpress.com	See Site
Receiver	US $15.99 \|Flysky X8B 2.4G 8CH PPM i data data powrotu (Mini odbiornik AFHDS 2A FS NV14 RC FPV Racing Drone Radio modele częśc (3 builds) Pl.aliexpress.com	See Site
Batteries	US $30.04 33% OFF\|GOLDBAT bateria Lipo 1300mAh 4S 100C 14.8V Softcase opakowanie z XT60 wtyczka dla RC samochodów ciężarówka (3 builds) Pl.aliexpress.com	See Site

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Discussion

KristofFPV Sep 09, 2020

Thanks for your opinions.
So the frame asked to be assembled upside down. As you noticed, it is much better to install the antenna.
Felt elements on the front of the camera cage are intended to protect it in the event of a frontal collision. And it works :)
Best regards :)

jrial Sep 02, 2020

Totally digging this build. Mounting the arms on the bottom makes sense, as it puts the thicker plate on the bottom, and reverses the slant of those rear pillars so you can screw an antenna holder to it that naturally points the antenna up without having to bend it. It may not be what the manufacturer intended, as they only include a rubber mat for the plate where the arms go, and the space between the arms is clearly designed to loop a strap through. But it's cool to see the frame at least allows for this configuration.

Also love that retroreflector up front. I can see that coming in handy when trying to LOS it back home in low light conditions with the aid of a head-mounted flashlight.

One question though: what's the purpose of those felt pads you put on the front of the aluminium cage?

SpikeDiesel Oct 07, 2019

Hey man nice build, but looks like you assembled different than the manufacturer pics, with arms on top,. Would you mind measuring for me the rear area behind the center stack mount? All ways, height width and depth.
I'm trying to fit a Dji Air unit in there with a 30x30 center stack and want something like my remix design. thanks much

KristofFPV Oct 08, 2019

its about 35 mm width, 25 mm height and 38 mm depth.

SpikeDiesel Oct 08, 2019

great thanks man, looks like it won't fit in this frame though

Noramas Sep 11, 2019

AlfaRC Apache 230mm arms can be bought separately. I'm wandering could AlfaRC arms be used directly with Tyro frame instead of week Tyro arms? Seems holes and distances betwwen holes are the same as Tyro. Only question is- does it fit 5"' props same way after replacement. Could you please compare and send feedback. P.S. Tyro109 arm- distance between first hole on the arm from the center and first motor hole is 90mm. How about AlfaRC Apache 230mm arm? Maybe it's reasonable to buy 6'' arm

KristofFPV Sep 12, 2019

I can't compare the distance between the holes in both arms now because I don't have the Tyro99/109 frame anymore. If you want to move the arms, please note that the arms arrangement in Tyro creates a true X pattern, while in the AlfaRC Apache 230mm they extend in width, this is not an ideal X. It may be important in the angles of the notches at the shoulder joint.
As for the opinions about the AlfaRC Apache 230mm frame, I think it is a very durable, well-balanced frame. She survived many serious accidents without any problems. It also gives the option of mounting the arms in the middle or bottom of the frame. Inside there is a lot of space for free arrangement of electronics. I can recommend her.

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