The new KK2 FC, info and Q&A in first post. Read it before asking a question. - Page 327 - RC Groups
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Oct 07, 2012, 10:44 AM
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tech69x's Avatar
Try putting one in your cart then logout then logback in an add another
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Oct 07, 2012, 11:12 AM
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Quote:
Originally Posted by tech69x
Try putting one in your cart then logout then logback in an add another
Thanks for the idea tech69x, unfortunately that didn't work, tried a few combinations of being logged in/out... maybe I'll just bring it up to support and see where I get.
Oct 07, 2012, 11:29 AM
Registered User
Quote:
Originally Posted by COCO2010
Thanks for the adviced ! If i'll get a camera it's gonna be a GoPro ,nothing else gets my attention but the GoPro.I checked the link you gave ..just to see what you are talking 'bout but,the HD Wing got mix bags reviews...got several iphones laying around that's why I was thinking of just playing with it for now...until I get rich and get a GoPro.
GoPro is the way to go. That's what I have on my FR4 multirotor. The little keychain cmos type cameras are great as headcams but not as good when used to record video from a quad or plane unless you do alot of vibration dampening and take care in balancing your motors and props.
Oct 07, 2012, 11:42 AM
Registered User

VTAIL/Multirotor Center of Gravity


This is what I meant about placing a line from motor to motor. Where the lines meet in the middle is the center of gravity and indicates where the controller should go.

Because the photograph is not taken from directly overhead, the angles of the lines are wrong so the COG is wrong as shown by the lines but you get the idea.
Oct 07, 2012, 12:52 PM
Registered User
Having some fun with my son's KK2 KMAN Kopter running the original V1.2 firmware

K-MAN Kopter 10-06-2012 (6 min 56 sec)
Oct 07, 2012, 12:55 PM
safer on the ground
teccer1234's Avatar

spinning


Quote:
Originally Posted by tech69x
I have found that the CG is very important as I had my battery 1in to far forward and it would spin to the left bad when I moved my battery back all was good.
glad to have been of some help
Ray
Oct 07, 2012, 01:06 PM
Custom quad builder
tech69x's Avatar
Quote:
Originally Posted by teccer1234
glad to have been of some help
Ray
Yes you did thank you sir.
Oct 07, 2012, 01:26 PM
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TheFernMan's Avatar
Quote:
Originally Posted by rcjose
Having some fun with my son's KK2 KMAN Kopter running the original V1.2 firmware
i think i have that cd of the music you used lol :P
Oct 07, 2012, 02:29 PM
Registered User
Quote:
Originally Posted by rcjose
This is what I meant about placing a line from motor to motor. Where the lines meet in the middle is the center of gravity and indicates where the controller should go.

Because the photograph is not taken from directly overhead, the angles of the lines are wrong so the COG is wrong as shown by the lines but you get the idea.
Sorry Sir,

but thats definitely not the CoG.

For better understanding:
http://en.wikipedia.org/wiki/Center_of_gravity

;-)
Oct 07, 2012, 02:33 PM
Registered User
Quote:
Originally Posted by TheFernMan
i think i have that cd of the music you used lol :P
Ferry Corsten's Gouryella and Out of the Blue
Oct 07, 2012, 02:38 PM
Registered User
Quote:
Originally Posted by critical_limit
Sorry Sir,

but thats definitely not the CoG.

For better understanding:
http://en.wikipedia.org/wiki/Center_of_gravity

;-)
I don't need a better understanding of what I already know when it comes to building various multirotors because I have built various ones. The center of gravity on a multirotor is the point where lines drawn from each motor cross.

And as I stated in my post, the lines in the picture will be incorrect due to the angle of the photo.
Oct 07, 2012, 02:42 PM
Registered User
Del-Dredd's Avatar
Quote:
Originally Posted by critical_limit
Sorry Sir,

but thats definitely not the CoG.

For better understanding:
http://en.wikipedia.org/wiki/Center_of_gravity

;-)
May not be CoG of frame but is Center of lift and where you want CoG to be as that is also the center or pivot moment ie where the craft will pivot around when banking, pitching and yawing.

The craft will handle and hover a great deal better with all those points coinciding, that is what was meant.

Why do you think the CoG on Helicopters tends to be inline with the rotor drive shaft, same reason.
Oct 07, 2012, 02:57 PM
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TheFernMan's Avatar
Quote:
Originally Posted by rcjose
Ferry Corsten's Gouryella and Out of the Blue
Ah the good ol' days of trance lol before dubstep O_o lol
Oct 07, 2012, 03:16 PM
Registered User
Quote:
Originally Posted by Del-Dredd
May not be CoG of frame but is Center of lift and where you want CoG to be as that is also the center or pivot moment ie where the craft will pivot around when banking, pitching and yawing.

The craft will handle and hover a great deal better with all those points coinciding, that is what was meant.

Why do you think the CoG on Helicopters tends to be inline with the rotor drive shaft, same reason.
Could not have said better.....
Oct 07, 2012, 03:24 PM
Registered User
Quote:
Originally Posted by TheFernMan
Ah the good ol' days of trance lol before dubstep O_o lol
Maybe that's why itr flew so well. I was in a trance