Guidance & Info about Quadcopter Project

Greetings lads,

I'm new in forum and since I made some research the past days I'd like to get some guidance about constructing & programming a Quadcopter from scratch since I'm completely new on a project like that.

Quadcopter Frame: Thinking about to construct an aluminum 70cm diameter frame which will weight around 500g. What kind of motors should I get in order the frame with the board,motors etc. will be able to lift?

Board: I'm thinking to use Arduino Uno or Raspberry Pi 2.0 ( With a little bit of research I made I conclude that Raspberry could make my life a little bit easier since you can add wifi on it. The quadcopter will be controlled via a pc/laptop through wifi). What can you suggest and why?

ESC: As far as I've seen in most of similar projects people using ESCs in order to control the motors throttle. Can you avoid that, with programming PIDs that make the same job in order not to use more hardware?

About PIDs and Code in General: Thinking about to simulate the whole project in Simulik, Matlab and somehow (if it's possible) to convert the Matlab Code into C++ and download it on the chip. What do you think about that?

About the whole project: I'm trying to minmize the hardware as much as it's possible (use only 4x motors, the board with the chip on it, cables and probably some sensors) in order to minimize the total weight of construction and ofc the price.

That's all for a start. I'm gladly waiting for your answers and ideas.

Cheers :slight_smile:

Frame: how heavy? Unless this thing is a giant, I think you’re about 450g overweight

Board: Uno. Also very heavy. Design on the Uno, fly with a Pro Mini.

ESC: just use the proper ESCs. The designers of those things have already solved 500 problems that will cause your homebuilt solution to catch fire.

Matlab: If you’re very good at Matlab then do this.

MorganS:
Frame: how heavy? Unless this thing is a giant, I think you're about 450g overweight

The frame will be made from aluminium pipes (diameter 8-10mm) and the whole frame size will have 70cm diameter witch I calculate that it will weight ~500g. Though it can be made smaller in any case!

70cm is a big quadcopter so I will revise my estimate to 250g overweight. I've never built a quadcopter - I usually work on manned aircraft - but I would be drilling lots of holes in the tubes to lighten them. Your local tool shop should have a jig that will hold a pipe in a drill press - this kind of thing is used a lot on bicycle frames, to fish-mouth the ends of the tubes. Lots and lots of holes. Those are heavy tubes.

MorganS:
70cm is a big quadcopter so I will revise my estimate to 250g overweight. I've never built a quadcopter - I usually work on manned aircraft - but I would be drilling lots of holes in the tubes to lighten them. Your local tool shop should have a jig that will hold a pipe in a drill press - this kind of thing is used a lot on bicycle frames, to fish-mouth the ends of the tubes. Lots and lots of holes. Those are heavy tubes.

So what would be a decent frame size & weight?