Introduction: Intro : Sugru at Our DIY Quadcopter Structure

Picture of Intro : Sugru at Our DIY Quadcopter Structure

At our hackerspace we were working on a DIY Quadcopter project. We build the structure using one Berkley ment box, grills, bottoms of energy drink or soda cans, plastic for affixing motors to bottom of cans . Basically with these parts the quadcopter was heavy. We were looking for a lightweight , flexible material to replace bottoms and plastic to keep motors in place. So we figured that we should use a magic material that was "Sugru"

Step 1: Replacing the Motors Place

Picture of Replacing the Motors Place

So we were using bottoms of cans. The aluminium part was great for fixation with screws but was a bit heavy.
So what we did with that ?
We got a small piece of cartboard with dimensions 65x50 mm. The cartboard didnt rezist with pressure of motors. So we applied a thin laywer of sugru at cartboard and mounted to the structure. The new one was better and resisted the pressuer of motors on full load

Step 2: Replacing the Plastic That Keeps Motors in Center

Picture of Replacing the Plastic That Keeps Motors in Center

So our motors were fixed in 3 points with screws by plastic. This material was not flexible and our quadcopter was doing noise while we were testing. So we replaced the plastic with sugru. So the motor was buffered because the material was flexible. The most important part was that we had less noise

Step 3: Working on Quadcopter With Sugru

Picture of Working on Quadcopter With Sugru

Comments

MsSweetSatisfaction (author)2014-11-08

Awesome use of sugru, you'll have to update us on how it flies.

Thank you ! We are working on version 1.2 of drivers now to reduce weight.

kresnat (author)2015-06-24

I hope it can fly soon.

-max- (author)2015-02-16

To get more power out of the motors, you may need to use gears. Brushed inrunners generally are loaded down too heavily by the props. It is easy to think that the motor does not need hardly any torque, but in thick atmosphere, and the speeds required to generate lots of lift, lots of torque is necessary! roughly speaking, the product of torque and speed is power, measured in watts or HP. (there's almost 800W in 1HP.)

In more technical terms, the optimum load for inrunners is relatively high RPMs, at lower torque. Load them down too much and they overheat and become inefficient. This is an 'impedance matching' problem. In the same way that driving up a hill in 5th gear in a stick shift. Does not work well and stresses the motor. It's better to just to gear down the output, and that would be putting it into 1st or 2nd gear as for the stick shift, or using some gears like you see on those cheap $60 ready to fly drones on anazon!

To control the motors effectively, I would use a IRF510 w/ reverse protection diode, and drive the gate with the flight FC, as a PWM signal. You will need every bit of current pushed into that motor as possible

-max- (author)2015-02-16

Do standard motors like that have the power-to-weight ratio you need in a quadcopter? I dont know, but that plastic moldy playdoh stuff does not look that strong. I'd love to see that fly though! It will show how inexpensive one of these quads can be built for!

Also, A lot of motors used generally are either outrunners, meaning that the whole outer part spins, and the inside does not, (just like a computer fan, in fact, almost identical construction!) rather than the usual inrunners, and the reason for that is that they are more torque-y, rather than these more speedy motors. KV is the more technical measure of that, I am sure you know!

The multiwii would be a great medium-sized and lightweight flight controller. Not only does it come with some EXCELLENT v2.3 code, which has a countless number of features, if you are willing to dig around for them, but also a big array of built-in sensors (baro, mag, acc, and gyro) as well as the possibility of adding sonar and GPS and other 12C sensors! I have got the GPS, although have not had a chance to test it's holding ability, nor it's return to home function yet. (honestly I have been a bit scared to test the return to home function, last time it decided to fly away from me, almost into a tree! I'll need to figure out why that is, most likely a reallly simple mistake on my part.) Because it is based around arduino, you could certainly write your own code from scratch if you feel like it!

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