Y4 vs QuadX vs Quad+

[tovrin]

I need to rebuild my frame due to a limitation i created when i purchased my new motors;
I need to have room for props that are 10 inches+ or i am not creating enough lift with my slower 850Kv (vs my old microDan 1600Kv using gws 8x4 3 blade props)

http://www.ecalc.ch/xcoptercalc_e.htm?ecalc
Ive been using this calculator to determine that I need 10+ inch props on a 3s battery using all 4 motors to keep my hover throttle at 50%.

but since I'm rebuilding my frame, Id like to discuss what shape is best. I think the Y4 easily solves the orientation issue with a quad. but thats not a huge issue and is relatively easy to fix anyway. I have heard the Y shape is more stable for mounting a camera too, but it seems to make sense to me the QuadX would be the most stable.

I'm interested in aerial photography with my go pro hero2, I'm not real interested in acrobatics, yet.

but what are the noticeable pros and cons of each the 3 four common rotor shapes?

[PatrikE]

May i add V-Tail as a suitable model?
Basicly a Y4 But rear-engines orientated as a V.

[tovrin]

I thought about adding that after the fact, so let the debate begin!

[tovrin]

must just be personal preference, nobody seems to have much to say.

[Bledi]

for me it's VTAIL. It's fly like a tri and have a lot of power.
Y4 was not a success for me. Impossible to find a good setup for the tail

[mon_lolo_fr]

Just to say that I personnaly prefer QuadX, for the look , they're funny to fly !
For camera mounting purposes, I prefer a tricopter (or Y3/6) because of the angle of view you can exploit in the front of the copter (remember that a GoPro cam could be setup to achieve a 170° of field of view !), so if you don't want to see any prop/motor in the field of view, then a tricopter will do the best

[copterrichie]

The Y4 in its original design uses Torque Differential of the two rear rotors to create YAW and not very efficient in my opinion. It is also very difficult to balance the trust in relationship to the CG. The V-Tail on the other hand uses Thrust differential and this is why it has such great YAW authority.

[kos]

nobody seems to have much to say.

http://diydrones.com/forum/topics/quad- ... cto-copter


big quad for me ..

next build will be a hexa with a vtail ( or an asctec falcon [1] clone )


1 : http://www.asctec.de/asctec-falcon-flugsystem/

[tovrin]

all right, some good info there, thanks for the DIYDRONES link, very informational.

so basically, i learned...

Y3/Y4 - nice for keep props out of camera vision, easy for orientation, low stability, low efficiency. can not lose motor in flight
QuadX - 1/3 more thrust than even a Y4 due to design, better YAW control, better efficiency. can not lose motor in flight
Quad+ - no data to report
Hex - better efficiency, better stability (granting your weight to thrust ratio is sufficient), can lose a motor but will lose yaw.
Octo - best stability, best efficiency, most cost, can lose a single motor and easily survive.

and VTail - better control, decent effeciency, bad ass look.

I think I am going to rebuild my current frame into a slightly larger QuadX for now, but i want to start working on a VTail, as i have 4 1600KV motors, and 4 850KV motors with respective ESC's I could use to make it a very powerful VTail, if i can figure it out. which seems to be premium for camera work...

[Bledi]

you can fin informations here : http://www.rcgroups.com/forums/showthread.php?t=1622447