So after smashing my old 4" into a tree I rebuild it with a new frame.
Karl just got the design of his new 4" frame ready, the 40r, so I ordered, with a 850 4s, a pre-production frame for testing (final version is the same however).
I am super satisfied with it - flies great on stock pids and 3.5-4 min of ripping on 850mah 4s.
Very agile, fast and sturdy. It's 166g dry (without battery) so with a 850 4s it has a power to weight ratio of about 15:1 :D
With a 650mah 4s it clocks in at 246g making it sub 250g.
Please refer to my BR3 - 4" Splitmini Beast if you are interest in more details.
I used most of my old parts, as only the frame broke, however I did change this:
I initially had the camera control ground wired to the fc - this caused lots of noise and some ground loop I believe. Wiring it to the same ground as the camera got rid of that.
Camera control only required a 220 Ohm Resistor resistor wired inline to the LED pad to make it work.
Apart from that I only had to resolder the rear motors from the underside to make clearing the rear standoffs easier.
They can work from the top too but you have to solder them at an proper 90° angle then.
Printing the canopy will be stronger if done vertically but then you get an ugly front. Printing horizontally will need lots of support.
I'll probably reprint it at some point to look nicer but its ok for now.
The tubes are only held by friction but did not came loose yet, I may glue them in just in case.
I have no idea where I got the tubes from - they were in my stash of antennas :)
Stock Betaflight 4.0 PIDs and filters worked really well. All I had todo was increase motor idle a few points to get rid of deathrolls when rolling.
AirbladeUAV has done it again and this time they've brought long range to the 5" class! Based on the popular Transformer Mini, the new Transformer 5" Ultralight adopts a lot of the same design philosophies with larger props and more payload capacity. It can fly upwards of 20 minutes on a 4 cell Li-Ion battery pack and in ideal conditions it's got a range of over 4 to 5 miles. In this guide I'll walk..
Read moreWith the release of the DJI FPV Drone cinematic FPV has become a lot more accessible, but you certainly don't want to crash a $750 drone! The QAV-CINE Freybott is a compact, lightweight cinematic FPV drone that can take a hit and keep going. It's a lot safer to fly indoors and around people. With a naked GoPro or the SMO 4k you can capture some great stabilized footage. In this guide I'll show you..
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this would be a better build than a 5 inch with Xing motors, more thrust to weight ratio. battery would be cheaper.
any cons??
the antenna mount is awesome!!
Thank you!
Only con I could think of is that with the canopy you can't strap an action cam for hd footage to it, but same thing if you build a 5" like that. I'd rather build a dual cam quad ala bando basher or intrepid v2 then tho to save weight vs. adding 70g of gopro to it.
It has become my favorite quad now - also very resilient so far due to the (compared to a 5") still relatively low weight - so apart from props you won't break much :D
so just need to keep it under 170g for crash resistance....
i would build it cheaper by using cheaper frame and stack.
one more question is it sort of drifty??
Compared to a 3" its soft and drifty yes, especially if you are low on throttle, but if you give it some throttle it will react instantly so very agile. Also it seems to hang forever you throw it around, you need to pay attention not to cross the whole field when doing a powerloop lol.
I got the stack and frame on a discount so overall the build was quite cheap for me :)
did you try four blades??
Nope - I am guessing 4" on those motors would be too heavy. The hq v1s are the only good 4" props I know off.
The gemfan flash for instance are nice but also not very suitable for lighter motors like this.
I love the way it flies however