I just completed an attempt to make the smallest RC aircraft. This is probably the 'smallest in the world'!
Wingspan- 6cm
Motor- 4mm coreless
LiPo-20mAh
RX- Scratchbuilt 2ch
Actuator- 120ohm
Prop- D1 drone

Weight breakdown
Motor- 0.45g
Lipo-   0.7g
RX-     0.1g
Act-    0.05g
A/F-    0.1g
Misc-   0.04g
Total-  1.44g!

The current flight time is about 2min. This is because I am using a very old lipo(undergone many cycles). Soon I will be fixing new one to get an estimated time of 6min!  

Video
https://www.youtube.com/watch?v=ovy46ZDTZzI&feature=youtu.be

Scratchbuilt 2ch RX
Weight- 80mg
8mm x 5mm

GOAL ACHIEVED!


(Try reducing the prop pitch to slow the model...)

  sir,
Already tried various props,lowering pitch will decrease the airspeed and ultimately result in a stall.
BTW, got the batteries I was looking for! Just arrived yesterday.

how did you build 2ch rx  from scratch ?
even i like to build ...

Nik, it's based upon the microchip's baseline Pic10f200 and 38khz IR sensor. Building it at such small scale is tough. If you are trying for the first time, try going for a bigger size. These tiny receivers are restricted to indoor use as they are based upon infrared technology.

ok kiran you useing PIC controller ..... thank you ...  its look nice ... 

Thanks Nik

Great work... Esp with making the Rx....
Maiden videos please...

Great Achievement.

@Imperial fire
Thanks!   Had around 6-7 try's before getting a light RX!
BTW, I have already given the video link.

  Swapnil

Looks like many are missing out the video. Here's the link
https://m.youtube.com/watch?v=ovy46ZDTZzI&persist_app=1&app=m

Very tiny and really cool masterpiece. Everything is super cool.

awesome 

Thank you 

amazing work!!
i was just wondering, if there is a way to do 2 channel without microcontroller.

Thanks!

Quote from: Herdmay1 on June 20, 2017, 10:00:27 PM
i was just wondering, if there is a way to do 2 channel without microcontroller.

IC's/microcontrollers are required to decode the transmitted signals. Without these, 2ch communication isn't possible.
However, to make a non proportionate system, IR receivers of two different frequencies may be used; Eg-38khz and 57khz(One frequency for each ch)
Nevertheless, the circuit becomes complex and bulky, rendering no tangible use.

With only 2 CH how you control the aircraft
  But awesome efforts

Quote from: Priyanshu@ on June 20, 2017, 11:59:35 PM
With only 2 CH how you control the aircraft
  But awesome efforts

Throttle is used to control the speed as well as altitude and rudder is used for yaw.

I agree, just for academic interest,  I was thinking of a low pass and a high pass. Since actuators are used I guess to just pass the pulse width info is enough or maybe not, passive components of filters may out weigh a tiny 10F

too small,just like a indoor racer