Winter is coming

By Nikotttin on Sep 10, 2020

4  306  3

Cold and rain is almost upon us... and the FPV gods hold me with their tight fit! Here's my hope for survival...
My wish was: (1) power on 2S (2) still small and nimble (3) whoop for indoor (4) light-ish.

I went for an 85mm whoop. The whoop frame in this size is very strong and supports abuse. I used the infamous BeeBrain V2 camera mount with the Runcam Nano v3 (1st edition) and a nano Eachine VTX (v2 - without the microphone). The Play F4 FC is really good. It's been repurposed from other builds and it just works. It does not have a SPI_X receiver... and I thus added a FRSKY XM. Works well enough. Note that I added an antena tube to straighten the xm antenna. I could have gone for some zip ties, but also wanted a cleaner look :) Is that an error? Maybe... The VTX and the XM antennas shift the CG toward the back. If I mount the batery straight below, the quad is rear heavy. It stops on a dime though. If I move the battery a little toward the front (by adding the ballance lead in the battery strap) then it picks up on speed and become a neat little racer :)

Motor wise, these are the 11,000 kv 1103s from betaFPV (had a good deal!). I'm a bit disappointed I have to admit. I wanted something more "peppy"... I tried some 2'' Gemfan and the current Kingkong 1935. I haven't flown many back-to-back packs, but first feel is not too much difference. I also have some hulkies to tryout. Note that these 1103 have no holes to screw in the props. I thus had to floss ;-)

I'm using jESC and betaflight 4.2.2. The PIDs and filter settings are those coming from the tuning video from Quad66 (THANK YOU!).

Final words: I need to get used to it. I've only flown a few packs. For indoor, it's likely going to have enough power to pull that matty... But for flying outdoors, I'll stick with the toothpicks, thank you :)

Here's the maiden:

Photos

Discussion

Sign in to comment

Mafaku   Sep 11, 2020  
1

Nice - I've got a set of those same motors and was thinking of building an 85mm 2s whoop like what you did. I would try the Emax Avan 2x2.5x4 props - I use those on a 10000kv 2s micro yard flier (not a whoop) after trying a bunch of props...they're really good IMO.

Nikotttin   Sep 12, 2020 
1

Alright you just selected the next props to try... That said I want to get rid of these 1935. They're brittle...

Nikotttin   Sep 12, 2020 

https://oscarliang.com/best-2inch-2-5inch-props/

That's how I selected the Avan 😉

Guides & Reviews

Jun 21, 2021

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 more
Mar 04, 2021

With 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..

Read more