good day for all
iam new on the forum, and i am trying to built my own quadro-copter drone. and i would like to spend about 700.00#$ for parts
i am trying to built it big about 700mm
what i need help for is : what kind of flight controller i can buy with GPS, and all the futures needed for my video cam ...etc
and the brush less motor that can carry about 3.5kgs
and the esc ..
and the best way to connect all that.
Replies
one of my friend recommend me this brushless motor on this link: http://www.nitroplanes.com/66p-182-gt3526-05-kv710.html
Let me reply to your first question like this.
For anyone to answer your question, they need to firstly understand what your purpose is. Cameras can weight anything from a couple of grams to a couple of kilograms and can be used for a number of reasons like FPV, still photos, high quality video, site surveying, mapping, etc.
So with the information you provided we cant really answer. You need to be more specific with regards to what you are trying to achieve with the machine.
You already mentioned that you require a GPS so I'd suggest that you go for either an APM2.6 or a Pixhawk board and the 3DR GPS. Both the product run the Aurducopter firmware and you'll be able to find A LOT of technical support on this forum for both those products.
Depending on the application, you then decide on a airframe configuration. So for normal FPV / Sport or if you are building your first multi-rotor, then a quadcopter works well. These frames are normally small (250-500mm) If you want to carry around around a lot of expensive video equipment then you will be looking at hex or octa configurations. These are much more expensive to build but they come with some degree of redundancy. These are normally quite a bit bigger (500-1200mm). The only real reason why you'll opt for a larger frame is to accommodate large props that supply more lift.
Only when you decided on a frame for your purpose do you look at motor / ESC / prop combinations. These, once again depend on the purpose. The reason why you will go for a large frame is because you need to use large props and therefor you'll look at Low KV motors which spins slower but has more torque to spin large blades. Large blades gives more torque to drive. In general, the lower the KV of the motor, the more power it will need and the bigger the ESC needs to be, so the ESCs are determined by the motor and the prop size. Low KV motors are much more expensive than higher KV motors.
Lastly you motor / prop / ESC combo dictates the batteries you'll need. Once you think you know what hardware you want to use, you check the weight of each part to make sure the that the thrust of all the motors combine is more than twice the weight of the machine and the video equipment you want to carry. If it's not, you need to adjust the motor / prop / esc combo until you are happy with the numbers.
In terms of your budget of $700, it's quite possible to build a very nice unit to start with, with $700. If you plan to carry heavy camera equipment, then I'm afraid your budget won't quite get there.
If this is you first build or has never flown any kind of RC aircraft before, I STRONGLY suggest that you start off by building a small machine with cheaper parts to learn how to fly these things. Fixing a large machine after a crash is much more expensive than you wont damage you're expensive video equipment. There are professionals out there that make this hobby look easy but trust me, flying any RC aircraft has a steep learning curve to.
It's not a question of "Will I crash" ... it a questions of "when will I crash" ! For your safety, and for the safety of the people around you, you need to start with baby steps and take you're time to master the basics on a small bird before jumping into carting heavy video equipment around.
I hope this helps.
thank you very much for helping me. i would like to tell what it will be my choise :
Foldable props? Why?
Also , with those motors and 15" props be careful of 30A ESC.
If you run 4S pack then it should be OK but it's still touch and go.
Anything higher than 4S pack, you'll need to go for something like 40A or more
their is no reason for fordable prop. for the stocking place issue.
and for the battery do i choose the higher of 4s? what it will be your advise for me?
you have mentioned for the 4s that is OK but it 's still touch and go what you mean with this. that it does not lease too long on used?
please give me your advice for the battery and i will follow it.
thank you
Hey
What I mean is, when you look at the spec sheet of the motors, on a 4S pack with 15" props each motors draws 23A max at full throttle. I think a 25A ESC will get very hot at that stage so It's a bit too close for comfort. A good quality 30A ESC will be ok.
If you look at 5S packs with 15" props the current drawn at full throttle will be 33.8A so even a 30A ESC won't cope. I'll rather go for a 40 - 60A ESC and start with 4S packs if you want to upgrade to a 5 or 6 S pack later then you can do that without upgrading the ESC as well.
So rather spend a little extra in the beginning and spend smartly rather than to spend twice which becomes really expensive.
5 and 6S packs are really expensive so i'd suggest starting with 4S 5000mah packs and 40 - 60 Amp ESC. 60 Might be overkill but I like to rather over design from the start than to cry later.
Hope this helps
it is ok . so you recommend for me to 4s 14.8v or the 6s Turnigy 5000mAh 6S 30C Lipo Pack
even if it is more expensive. but it on 22.2V you think will change anything on the ESC or on the motor or on my autopilot?
http://www.hobbyking.com/hobbyking/store/__14990__Turnigy_5000mAh_6...
The motors have not spec on the spec sheet for 6S and 15" props so I have no idea what kind of amps we'll be talking.
http://www.hobbyking.com/hobbyking/store/__9516__Turnigy_5000mAh_4S...
I what I suggest you start with.
3515 EMAX spec are:
kv: 650
max thrust:2870g
no of cell: 4-6s
framework:12N14P
propellers: APC13-15
length:33.38mm
weight: 131g
shaft:5mm
diameter41.55mm:
If you say you want to carry 3.5KG, does that mean the camera equipment you want to carry weighs in at 3.5kg?
If that is so you have to include the weight of the copter hardware as well and then it becomes quite a heavy bird.
Ok, let's for now, just start there, we can go into more details a bit later.
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