Eachine US/UK65: Relevant in 2020?

By Werdna FPV on Dec 18, 2019

7  397  8

With the advent of super-powered 1S brushless whoops in late 2019 such as the Meteor65 and Mobula6, I set out to find if my old Eachine US/UK65 could stay relevant amid the crowd of new technology, thus I set out to mod it to be faster, more powerful, and lighter.

Dry weight of my quad and the contenders:
Mobula6: 19.76g (according to Gal Kremer)
Super Eachine UK65: 22.5g (according to my crappy weighing scale)
BetaFPV Meteor65: 22.8g (according to Nick Burns)
So, my quad is not the lightest but it is definitely still quite light, as it stays below the 24g dry weight needed for good performance.

BetaFPV Beta65 Pro Frame
Better than the original brittle frame, not expensive, and around the same weight. Highly recommend changing ASAP as the stock frame is really bad.

Happymodel 0802 19000kv Motors
A significant upgrade over the stock 0603, which are the same KV but ridiculously less efficient. Average amp draw on 0603 is 5.5A but only 4.3A on the 0802, leading to 45 seconds more flight time. The top end power is the same as the KV is the same but there is more low end torque on the 0802, similar to how a 2306 motor has better low-end control than a 2207 due to the wider stator. This is the most significant upgrade to the UK65.

Solid-pin PH2.0
This upgrade is a must-have as the voltage sag on the stock crimped pins with U-shaped hollow connectors is terrible, sagging to 2.8V at the end of the flight, while solid pin allows voltage to stay robust at 3.1V and above throughout the flight and is better for battery life. I cannot stress how important this simple upgrade is for longer flight times, more power, less overheating, lower amp draw and better health of the 1S batteries.

Gemfan 1219
These props are incredibly hardy, I have flown the same pair for a few months and not a single one has broken after numerous crashes. They also have good efficiency and control and I cannot tell the difference between it and a 4 bladed prop while turning tight corners. The only downside is that it is near impossible to turtle mode. I also tried Gemfan 1224, Eachine E010 stock props, BetaFPV blue props etc but none were as good as the Gemfan 1219.

Betaflight 4.1.1 RPM Filtering
I am still trying to work this out but with JESC it is now possible to get RPM Filtering on Brushless F3 boards like these. UAV Tech explains it quite well. But honestly it already flies really well without RPM Filtering.

Conclusion: US/UK65 can still be relevant in 2020 :)



Sign in to comment

RoBerti   Jan 13, 2020  

In stressful working hours, your work is too stressful. We always create a sense of comfort for you so you have a relaxing time. You try dinosaur game an extremely fun game. thank you!

Werdna FPV   Jan 16, 2020 

Thanks bro but FPV is a better stress reliever :D

StickyRice   Dec 19, 2019  

yes they are still relevant!! imagine if you can still make it work after 2030...thats a working piece of vintage tech hahaha

Werdna FPV   Dec 19, 2019 

Haha... given that some people still fly their KK2.0 quads, I'd imagine that is possible. Not like it would be wise though, as tiny whoops in 2030 will probably all be 6S with Betaflight 10.1 and have some crazy sort of power and agility unfathomable to us right now. XD

StickyRice   Dec 19, 2019 

OMG a 6s whoop dsjlgmnsjgnkjsg. I can only imagine ahhaha. The battery is like 3 times heavier than the quad ahhahaha

Werdna FPV   Dec 19, 2019 

Haha not necessarily. Imagine a GNB 6S 50mah. Together with some 0802 4000kv motors. Can you imagine what a beast that would be LOL

LucaFur23   Dec 18, 2019  

Can i get the gear cost?

Werdna FPV   Dec 18, 2019 

I spent about US$40 on upgrades in total

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