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« on: June 18, 2017, 10:29:59 AM »
kiran rc
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I just completed an attempt to make the smallest RC aircraft. This is probably the 'smallest in the world'! Cheesy
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

Micro1.jpg
Smallest RC plane- 2.5inches wingspan!
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« Last Edit: June 18, 2017, 11:50:09 PM by kiran rc » Logged
 

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« Reply #1 on: June 18, 2017, 10:52:31 AM »
kiran rc
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Scratchbuilt 2ch RX
Weight- 80mg
8mm x 5mm

Micro5[1].jpg
Re: Smallest RC plane
* Micro5[1].jpg (12.4 KB, 448x285 - viewed 191 times.)
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« Reply #2 on: June 18, 2017, 11:12:57 AM »
K K Iyer
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K K Iyer is working their way up.K K Iyer is working their way up.K K Iyer is working their way up.
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GOAL ACHIEVED!
 Clap Hats Off

(Try reducing the prop pitch to slow the model...)
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« Reply #3 on: June 18, 2017, 11:26:19 AM »
kiran rc
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 Thanks 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.
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« Reply #4 on: June 18, 2017, 01:14:15 PM »
Nik
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how did you build 2ch rx  from scratch ?
even i like to build ... Smiley Smiley
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« Reply #5 on: June 18, 2017, 01:23:20 PM »
kiran rc
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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.
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« Reply #6 on: June 18, 2017, 07:47:54 PM »
Nik
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ok kiran you useing PIC controller ..... thank you ...  its look nice ...  Smiley Smiley
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« Reply #7 on: June 18, 2017, 11:36:11 PM »
kiran rc
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Thanks Nik Thumbs Up
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« Reply #8 on: June 19, 2017, 08:06:29 AM »
Imperial fire
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Great work... Esp with making the Rx....
Maiden videos please...
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« Reply #9 on: June 19, 2017, 01:15:33 PM »
swapnilnimbalkar
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Great Achievement.
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« Reply #10 on: June 19, 2017, 02:34:50 PM »
kiran rc
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@Imperial fire
Thanks!  Cheesy Had around 6-7 try's before getting a light RX!
BTW, I have already given the video link.
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« Reply #11 on: June 19, 2017, 02:36:50 PM »
kiran rc
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 Thanks Swapnil
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« Reply #12 on: June 19, 2017, 02:50:42 PM »
kiran rc
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Looks like many are missing out the video. Here's the link
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« Reply #13 on: June 19, 2017, 03:22:47 PM »
Balakrishna Reddy
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Very tiny and really cool masterpiece. Everything is super cool.
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« Reply #14 on: June 19, 2017, 05:24:10 PM »
vishal
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awesome  Clap Clap Clap Clap
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« Reply #15 on: June 19, 2017, 09:03:40 PM »
kiran rc
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Thank you  Smiley
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« Reply #16 on: June 20, 2017, 10:00:27 PM »
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amazing work!!
i was just wondering, if there is a way to do 2 channel without microcontroller.
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« Reply #17 on: June 20, 2017, 11:36:30 PM »
kiran rc
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Thanks! Smiley
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) Grin
Nevertheless, the circuit becomes complex and bulky, rendering no tangible use.

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« Reply #18 on: June 20, 2017, 11:59:35 PM »
Priyanshu@
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With only 2 CH how you control the aircraft
  But awesome efforts
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« Reply #19 on: June 21, 2017, 12:32:24 AM »
kiran rc
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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. Thumbs Up
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« Reply #20 on: June 21, 2017, 08:57:48 AM »
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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
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« Reply #21 on: June 22, 2017, 01:11:30 PM »
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too small,just like a indoor racer
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