Hai friends saw a lot of micro flyers which built from scratch in this forum.. There was some parts of an rc heli lying around.. Decided to build one yesterday..
bought some styrofoam plates from near by store..
And also some icecream sticks
Started the build yesterday..
Its finished right now and wingspan of 400mm
weighs about 26gms including everything..
Twin motors with 3inch props(i think i need to change it to the micro quad props to get more thrust)
Now will upload some pics of the plane.. it is flying good but taking too much effort to turn..
Looking forward for your valuable suggetions..  

Added a bit of styrofoam in the nose to balance the cg..
Which added about 1 gram more weight..
The thrust is okay but not good..
Will be using cf rod for fuse for the next attempt 

nice build arun. 

Dear Arun,
Wonderful built. You are my first inspiration.

I have two of my old helis sleeping in my desk.
Each one has two core-less motors and ESC/receiver(IR)/Lipo already available.
Plenty of styro plates of all size available in my wife's custody. I can steel it over night.

can you give some spec. like total length/tail size.

What is the shortest flying radius? I am dreaming to fly within my living room for a long time.

And....as usual ... any videos .... to cheer up the crowd....

wow guruji great ya i alway wanted to build a micro im inspired

  great going

looks good what about the control surfaces??? or its left right motor control
what s the card u r using??

I guess it takes turns based on the motors speed difference and i guess thats how a co-axial works....The Infrared helis (co-axials) contains two motors inside it. The right throttle, moving left and right will increase/decrease the respective motor speed and so it takes turns. The same thing will also works in case of this micro as well...

correct me if i am wrong....

@Arun, you could have used small gear boxes instead directly attaching propeller to the motor, It may give more performance.

Arun you stole our idea

me and bilal had been thinking of building it since last few weeks. all we are lacking is few hours of ree time and a couple of 5x3 or 5x5 prop which will suit the heli motors we have..
for your build. We will learn from your mistakes  .

One more think i would like to suggest:

Im sure you are gonna control it via differential speeds of motors.
If i would have been there, i would have tilted the motors to 2-5 degree downwards.
So, it will act as your elevator at differnt throttle. At your present setup, wings might be experincing too much lift at a decent throttle and your plane is gonna act like a tail heavy.


One more thing to add: get in touch with "sundaram" sir,.

whr u buy micro pro? i wana buy

@shivela: Thanks a lot dude.. videos coming soon...

Quote from: romanxdsouza on February 19, 2013, 07:27:13 PM
wow guruji great ya i alway wanted to build a micro im inspired

Thanks roman.. You can also do this man.. We will do it...

Quote from: sundaram on February 19, 2013, 07:38:34 PM
great going

@sundaram : Thanks sir, sir i have to ask you something that can i have an option to use a small actuator to this ir receiver..?
I cant find the rudder motor wires from the receiver as they are pulled out blindly..

Quote from: rastsaurabh on February 19, 2013, 07:49:50 PM
looks good what about the control surfaces??? or its left right motor control
what s the card u r using??

At this stage it is simple left right motor control but it is difficult to control like that as the ir range is very less in sunlight... I have some actuators trying to mount a rudder atleast along with the motor control..
Thanks saurabh bhai...

@kumardasai: sir actually this motors can actually spin those props without any gear box..
  If i am using gear reduction then i can use bigger props, but as they are controlled as you said by differing the speeds, mounting two big propellers in the front wont be that fine right? correct me if i am wrong..
Thanks for the suggetion sir..

Quote from: abhay on February 19, 2013, 08:51:17 PM
Arun you stole our idea

me and bilal had been thinking of building it since last few weeks. all we are lacking is few hours of ree time and a couple of 5x3 or 5x5 prop which will suit the heli motors we have..
for your build. We will learn from your mistakes  .

One more think i would like to suggest:

Im sure you are gonna control it via differential speeds of motors.
If i would have been there, i would have tilted the motors to 2-5 degree downwards.
So, it will act as your rudder at differnt speeds. At your present setup, wings might be experincing too much lift at a decent throttle and your plane is gonna act like a tail heavy.


One more thing to add: get in touch with "sundaram" sir,.

I refered a lot from sundaram sir's micro builds( salam to sundaram sir)
And by mounting the motors a bit downwards will make it roll while turning as they are controlling by differing the motor speeds(correct me if i am wrong)
the elevator is working out good by incr/decr of throttle in this setup..
Any This is my first attempt and need to do many many many more improvements thanks again for a lot of suggestions... start building your's also even i can learn from that

Quote from: palwindersingh on February 19, 2013, 09:12:03 PM
whr u buy micro pro? i wana buy

What you ment by micro pro? I am using a toy heli radio system for this build..

Quote from: arun.sreelakam on February 19, 2013, 09:33:25 PM
can i have an option to use a small actuator to this ir receiver..?

Yes you can use actuators for elevator control in certain circuit boards of coax IR heli which have tail rotor motor and prop for pitch control and achieving forward and back control.

Sir this is a cheap ir heli  thrown by my friend.. i think it had a rotor in the tail and 2 very thin wires are connected to it from the receiver.. but how could i find the exact locations..?
I have some 6mm actuators..

If you have a multimeter or an LED with 100 ohm resister You can make a probe to see the output of the contacts which are usually at the tip of the circuit, which gives output corresponding to the stick movement.

The Contacts for the tail rotor gives out nil output at center stick position and gives output at stick deflection and Polarity of the output changes corresponding to the deflection of stick for pitch control from positive to negative. The flow of current reverses.

@sundaram sir: sir i will try doing that.. i have multimeter but i think the led is a better option so that i can find out the change in polarity also.. Will the rudder control pins produce as much current to light up an LED?

Sorry arun i meant elevator in my above post. ive corrected it in the post itself

Great going Arun sir.......we'll be up with our build in a day or two, so keep watchin, ;-)

Before adding weight to nose, adjust battery and electronics board position for CG balancing so that every milligram can be saved.

Use dry wood as fuselage or even foam plate too.

Use mechanical elevator trim so that the full throttle can rise the nose and level flight can be achieved al lower than full throttle.