Hi!
I have no idea of what I am doing and so would really appreciate some other peoples thoughts.
I have a school project where I choose to try build an rc propeller plane but I don't know anything about the parts I recieved or even if I can use them.
The parts I have are:
2 arduino standard servos for the wings to be able to rotate,
1 arduino nano as a controller for the servos,
1 FrSky ACCST XSR,
1 A2212/13T electric motor with what I believe to be a kind of controller attached to it,
1 TaranisQ X7 controller
and some other small parts like transistors.
I asked for some specific parts but recieved these that I have no idea how to use and can't seem to find any kind of manual or help online.
Building your first plane is enough of a challenge.
You should not even consider building your own radio control stuff with Arduino until you have a good understanding of whats involved in matching motors to props and to batteries and controls.
Buy a ready made radio control system and go to here for help putting it all together.
Maybe after a year or so of experience of flying models consider building your own radio control stuff.
I can see where you both are coming from but that really is not the point of this post and is not the question I asked.
Paul the problem with a small rc plane is that it is difficult to have small moving parts in the wings which is why we are going to be rotating the whole wing around its center.
srnet I know that you think this and I do agree with you but this is not actually an answer to my question and I have built things that are on this level of difficulty before, just not with these parts. I was given these parts by my teacher and I want to know if i can actually make use of these parts or if I need to request other or more parts and in that case which parts.
But thank you both for your consideration and taking the time to answer to my question!
But the mechanical construction of model aircraft has little or zero to do with Arduino.
However the RC Groups forum I linked to is full of people with a great deal of experience in all forms of model aircraft construction. There is even a DIY Electronics forum;
That's because the bulk of the moving parts are either held in the body of the aircraft if the wing is quite thin, or the servo(s) are partially embedded in the thickest part of the wing like this (image from RCGroups.com) :
You have 2 servos, so either rudder/elevator or aileron/elevator control surfaces. What does your aircraft kit support (you're not designing and building from scratch are you?).
It's not clear what your project is. You have a transmitter (the TaranisQ X7) and a receiver (the FrSky ACCST XSR). I had to look them up so please don't assume I have direct experience of them!
From the brief docs I saw on the receiver, it seems to output SBUS messages.
Maybe your project is to use the Nano to decode the SBUS messages and control the 2 servos and an electronic speed controller for the motor?
[quote="ghostofsteel, post:4, topic:955612"] rotating the whole wing around its center.
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I just want to ask before going any further….
“around the centre”, is this ‘rotation’ applied for ‘lift’ or ‘angle of attack’ ?
I know the question is closed, and the apparent answer is obvious, but wondered this from the very start…. depending on the answer, the components may be eminently unsuitable.
I took it to mean that the OP was intending to alter the pitch of the whole wing in relation to the airframe. I don't know the forces involved in doing this compared to just using ailerons. I wonder if the servo is up to the task.
There is plenty of information about the parts but I imagine just beyond your understanding.
So who decided these particular parts were required..?
Is it necessary to use these particular parts...??
As previously pointed out the Tranis x7 is the transmitter. Fairly straightforward there BUT needs some study in the programming.
No such thing as Arduino standard servo......probably just a basic servo.
Type or brand would have helped to get a handle on the project as a whole as it would probably point to approximate size of this aircraft.
2212 motor would tend to point to it being rather small (and possibly difficult to fly in some instances)
No idea what the transistors are for.
The Frsky XSR receiver does have S-BUS output BUT it also has CPPM output which is just a single line from the receiver with all the 8 channel info on it.
It is possible to read this and convert via the Arduino to a drive signal to your two servos.
By supply of a nano, I assume they want you to convert the CPPM signal.
Contrary to some comments above, there is a project where a small model glider is modified to have the wings rotate as a form of "aileron" control AND "elevator" control via transmitter mixing.
Video below.
Rather an overall difficult project for a beginner in many aspects.
More detail overall on who came up with this idea to begin with and why so complex for a beginner.
Would be much simpler with a standard receiver. Actually the QX7 is rather expensive compared to say an FS-i6 and FS-iA6 receiver which by the way has not only standard servo drive output where you could simply plug the two servos in ( no Arduino required) but also S-Bus AND CPPM if required for around $70.00. Also has many of the x7 programming features.
And the design of each wing will have to have the main spars inside the fuselage supported by thrust bearings in order to allow the movement. Likely a lot more weight than necessary.
