Design for future project.

[Ododobe]

I am new to this addiction and hope to soon buy my first quad, probably a GAUI 330 for training purposes, but I have done a lot of looking around and one day hope to build my own from scratch and go FPV along with aerial photography.
I decided that a quad would be better to start with than a tri because of the amount of people that seem to think that the servo necessary on a tri is a week link of some sort and that the quad would carry a greater weight. So I first decided that I would build something like this.

View attachment 1172
But I read further and found out that having a flat surface like that can cause vibrations with the prop wash.
So I decided on something a little more traditional looking along these lines.

View attachment 1173

Nothing fancy there.
As I read on I come across argument for the tri as it is smoother to fly, has better yaw capabilities and the orientation is not an issue.
Then I came across MatWelly's Vtail Quad which he says has all the abilities of a tri.
SO I started wondering.
Other than a Vtail has anyone out there tried configurations like these?

View attachment 1174 View attachment 1175

Concept X15: Standard X configuration with motors tilted inwards 15 degrees to aid in yaw control.
Concept V:Similar to a Vtail but with two rear arms with motors rotated inwards 30 degrees instead of mounted on a bent bracket on a single arm.

I don't see any reason why each of them wouldn't work and am especially keen to know if anyone has tried the Concept V configuration.
If it a successful concept I hope to build something like this. That is of course once I nail the other three hundred questions I have about the electronics side of it.

View attachment 1176

Cheers Odo

 

[Borneoben]

Hi

Im not sure about your X15 concept adn teh benefits of this but i do know for a fact that your Concept V idea is a very good one!!

OUr resident Copercontrol Expert Matwelli has built many with a similar configuration although he would recommend a 35 degree incline on your rear props although im sure it will work fine.

To use teh V Tail system you needa Flight controller that allows you to make your own custom mix tables.

Coptercontrol does this very well.

Search for V Tail quad and see what you find.

Most Versions of teh Vtail quad have one single rear boom and then the motors mounted in T fashion i believe thiswould be lighter.

I am also building a V tail quad you can see my thread here.
I havent updated it for a while but the main airframe is now fully fabricated and assembled. I will try and get some photos soon.
http://www.multirotorforums.com/showthread.php?738-Planning-V-Tail-Quad-Build-Opinions-Please.....

Cheers

Ben

 

[Ododobe]

@Ben

Nice build there and I must admit to a small tear as I got to the last page and saw those horrific images.
What material did you use for the plates?

I figured that the X15 concept was probably a wash but had read somewhere that the Mikrokopter 8 used a slight pitch to aide in yaw on their big monsters.
Perhaps 15 degrees was a bit ambitious but an angle maybe closer to 5 degrees might help and not take too much from the lift.

The V concept I feel would work well and a little extra weight would not be an issue as I don't envisage using it to carry too heavy a load.
More of a FPV runabout sort of thing.
When I get the hang of these things and want to move into a more stable craft for AP I guess I will be looking at an straight 8 or X8 like most people.

Thanks for the input and looking forward to seeing the rebirth.

Odo

P.S. I have since found a post that has tested a format like Concept V http://www.rcgroups.com/forums/showthread.php?t=1338634 .
While it looks unstable in the "decent wind" that he is flying it in he also says that the flight controller wasn't the best.
I am sure that a more up to date controller such as CopterControl would be able to handle the configuration as well as it does a
normal V Tail Quad.

 

[Borneoben]

Hi Odo

LOL Yes i also nearly cried!

The Tri copter was built using 6mm Lite Ply and the arms were double 10mm carbon hollow square tube.

It hasnt quite been reborn yet but i already have the frame from teh begining of that thread all cut and assembled i really need to get around to updating that thread some more!
Most of my time has been taken up designing a new aerial Photography rig!

Good luck with your V tail keep us up to date with your build.

Ben

 

[Borneoben]

I forgot about this thread i did see it a long time ago.

Yes i am sure the Copter control would handle it much better as you can control the motor mixing table to get exactly the control characturistics you need.

Good Luck!

Ben

 

[ovdt]

Hello,

Like Ben, I liked the Concept 5. It's a V tail, as Matt demonstrated before, it works good with OP CC board.

I'm very interested in seeing a successful flat V6 or V8 design.

http://www.multirotorforums.com/showthread.php?1143-V6-and-V8-Frame-Designs