Back On Track 5" by Left (I'll Go Left)

Notes :

- This frame DOES NOT support DJI O4 Pro cameras. You are free to modify the frame to make it fit.

- Limited size! This frame is very compact, please check the frame dimensions before making a build decision.

- Low profile! ( 15mm stack clearance) You can increase the height of the frame by changing the size of the spacers.

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Philosophy

What makes this frame special is that it's not special at all . It's a simple mashup of features I like from other frames, not trying to revolutionize anything here. Everything has been meticulously studied to match my needs and desires , every detail is intentional and every aspect of the final build have been carefully considered, searching for what suits me best.

It's designed for precision freestyle with high KV motors, 4.9" propellers with a relatively low pitch , and a low mass ( 660g , battery and action camera included), but it's still very robust .

The geometry is TrueX , double deck (damn, another Apex clone... *insert clown emoji* ), it's compact , and the top plate is lowered to give it a " low profile " flying behaviour.

My setup

I've been flying this setup for a few months now , it's safe to say that this is by far my favorite quad to fly .

On this frame, I use T-Motor F60 Pro V LV 2020KV motors with Gemfan 4934 propellers. Using light and high-KV motors with light 4.9" props is recommended.

I pair this setup with an HDZero Freestyle VTX and an HDZero Nano 90 V2 camera. I find the VTX a bit heavy... I prioritize systems with the lowest possible latency ; analog is a good choice too.

Finally, I use a KISS Ultra V2 and a Foxeer Reaper 65A .

For the action cam, I have a Runcam Thumb 2 . It’s not a great camera, but I can't seem to find a good compromise that keeps the setup lightweight . It has the advantage of being inexpensive .

When I choose my batteries, I just go for the "cheapest worth buying." Ovonic is unbeatable for that; I’d rather get more stick time than overspend for a few extra percentage points of performance.

Specifications and design

T700 carbon fiber is highly recommended , the whole manufacturing process cost me around 69 USD / 97 CAD / 59 EUR, no hardware .

- Wheelbase : 230 mm

- Naked weight : 130 g (hardware dependant)

- Arms : 6 mm

- Plates : 2.5 mm

- Motor mounting : 16x16 mm

- Stack : 30.5x30.5 mm M3 or 20x20 mm M3

- Rear stack : 20x20 mm M2

- Stack clearance : 15 mm

- Camera clearance : 23.5 mm

- Recommended propeller size : 4.9"

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Simple but effective keystone for better impact repartition .

There are multiple sizes of press-nuts; check with your manufacturer regarding these inserts, or modify the frame to suit the ones you have/want.

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Countersunk screws stack mounting to avoid protruding press-nuts under the ESC and create more room for the stack.

The stack screws become inaccessible once the frame is assembled.

This feature comes from the Apex by ImpulseRC .

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