Oktokopter has little to no yaw in one direction!

[Doyen]

Wow!  Congrats OKFan!  I was getting frustrated for you... and kept trying to come up with other things for you to try.   I'm so glad that it's fixed.  Time to put some serious flight time in... to catch up on all that you missed :p

Congrats again.

[SteveG]

Glad to see you got it fixed.  

I'd keep an eye on the arms of the octo just to make sure that they do not work loose or return to the position that caused the yaw problem in the first place. Because the MK can automatically adjust for errors it can sometimes be very difficult to find faults as, just as you have found out, the MK covers them up.   Good in some ways, but it can lead you into a false sense of security.

Have fun flying, and dont forget to remove the office chair, Mk's are not meant to carry passengers

Steve

[Doyen]

I realize that it's fixed now, but this would have been a great opportunity to use the new MKTools 3D display.



Of particular interest: Yaw (upper scale) When the frame is not straight, the MK must always oppose to the yaw. Now you can control this too.

[OktoKopterFan]

Hi Doyen

Sorry for the late reply. I have been out there flying my new Okto as often as I can and spending the indoor time trying to figure out the rest of the add ons like gps etc.

I don't know how to use the MKTools 3D but I can tell I want to!

Would you mind giving a quick explanation of the 3D tools in the Newbie secion as a new post so it doesn't get hidden inside this old one? Or is there already a 3D explanation there?

Thanks again for the feedback.

[tucker]

Have any Okto owners experimented with any modifications to reinforce the arms on the Y frame? I just finished building my Okto and now I'm discovering that some owners are having yaw issues due to the faulty frame design, but it doesn't seem like anyone is trying to remedy the problem other than straightening and leveling the arms continuously. Would it make any sense to attach rods connecting the four Y arms near the motors? This may reduce some of the twisting that has been talked about. Any Okto owners tried this or other mods?

[Crash]

Have any Okto owners experimented with any modifications to reinforce the arms on the Y frame? I just finished building my Okto and now I'm discovering that some owners are having yaw issues due to the faulty frame design, but it doesn't seem like anyone is trying to remedy the problem other than straightening and leveling the arms continuously. Would it make any sense to attach rods connecting the four Y arms near the motors? This may reduce some of the twisting that has been talked about. Any Okto owners tried this or other mods?

I'm going to try reversing prop direction and see what happens. That should enhance yaw when weighted. I haven't seen any problems yet but I haven't flown fully loaded with a DSLR like some guys.

I did notice that it's possible to twist the arms and have them stay tweaked. A real easy way to see that is to lay the Okto upside down on a flat surface before the boards go on.

[vpatron]

Just FYI that I learned something from you guys' post.

After a crash my hexacopter frame got tweaked. I straightened it but it just didn't seem to fly as steady as before. I checked and 2 riggers were slightly twisted such the motor was tilted a bit.

I put the hexa with no landing skids on a very flat heavy table on top of the wife's springform cake pan so the riggers were on the edge of the pan. I measured the tips of the propeller to the table and 2 propellers were way off, like 8 mm difference between each tip. I found that a 12 mm box end wrench fits the rigger tubes perfectly and I used that to twist them back to nearly flat.

The hexa flies nice and steady again. Yay!

-Vince

[tucker]

I recently did a modification to my Okto frame and I wanted to share some photos.

After reading the reviews regarding the "poorly designed" Okto frame, I quickly understood what people were talking about. The stock frame has no support near the end of the arms, therefore the arms are free to twist and bend any which way. So, I secured two 10mm carbon tubes to the frame fastened at six points. Not only has this modification given the frame a great deal of rigidity, it has helped keep it in perfect alignment. The carbon tubes won't allow the arms to flex or twist much, if at all.

As far as the flying characteristics are concerned...it's much much better! I can take off in free mode and it flies perfectly smooth and even. I'm not adjusting my nick and roll constantly. Anyway, hopefully a few Okto owners will find this mod of some interest. I really think this is a great frame now and I'm not yearning for the new Okto2...at least not for awhile. Cheers!

[Silverwood]

Tucker this looks like a good mod...how did you attach the tubes at the motors?

[Buzzed]

Tucker why not 2 more on top to strengthen the other arms?

I like your landing gear can you elaborate and show a few pictures?

[tucker]

Tucker this looks like a good mod...how did you attach the tubes at the motors?

I attached the carbon tube near the motors using the last hole. That way i didn't have to drill one. Those three holes are actually quite large so I had to cut a piece of the carbon fiber to use at that point to work as a plate where the nut would tighten down. I suppose you could use a large washer if you wanted. Also, the hollow carbon tube will collapse quite easily when you tighten down, so I cut a piece wood (that's all i could come up with at the time) to insert for each mounting point. Still have to be careful to not tighten too much. Hope this helps.

[tucker]

Tucker why not 2 more on top to strengthen the other arms?

I like your landing gear can you elaborate and show a few pictures?

Hey Buzzed, you could certainly add two more tubes. It looks like you would have to do some drilling on the aluminum arms since you would have to run the second two on top where there are no existing holes to use. I think that arrangement would give you a pretty bullet proof frame IMO.

My beginner's landing gear was made from the same carbon fiber tubing fastened with zip ties along with some foam attached at the ends. I broke the skinny little rails that came with the kit. I'm getting much better at bringing the Okto back to the ground so I'll probably take the foam off eventually. It does make for a less harsh landing though. Might even float the Okto in the event of a water landing!

[jm0eller]

   Wow .. thats great .. will cure what ails my okto ...
Where did you get the sqaure tubing .. cant find any ....
THANKS !

Karma your way ...

[funk_e]

This is a great mod, and actually looks way cooler than an Okto2 now anyway!

Well done :-)

[tucker]

  Wow .. thats great .. will cure what ails my okto ...
Where did you get the sqaure tubing .. cant find any ....
THANKS !

Karma your way ...

I bought the square tubes here: http://www.bphobbies.com/view.asp?id=V641945&pid=D2625025
If you buy six they are $10/each