HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Oct 18, 2012, 09:14 PM
Flying Monkey
heli-yeah's Avatar
Lexington, KY
Joined Aug 2010
307 Posts
Discussion
Sweptback V-Tail Design

Here are just a few photos of my new sweptback V-tail. I wanted it to look fast even if it's sitting still. What do you guys think?

Name: Picture 3.jpg
Views: 542
Size: 90.0 KB
Description: Name: Picture 2.jpg
Views: 352
Size: 73.9 KB
Description: Name: Picture 6.jpg
Views: 401
Size: 79.4 KB
Description: Name: Picture 4.jpg
Views: 520
Size: 75.8 KB
Description: Name: Picture 1.jpg
Views: 460
Size: 82.5 KB
Description: Name: Picture 5.jpg
Views: 500
Size: 81.1 KB
Description:

Some of my ideas I wanted to realize where...

Dual rear motor/prop pair should match thrust, and draw of each front rotor,

Dual rear prop pairing should be as close as possible to the same tip-to-tip span as each front props length, (rear span is 12", front props are 11" )

Center of all rotors/hubs should be equidistant from center of frame, so that the FC is at center of the rotational axis,

Fast yaw rate,

And finally, it must look menacing!


SPECS:

Flight Controller) KK2 (firmware V1.1) V-tail mix ( with reversed rudder outputs in mixer editor )

Props) 11x4.7 front, 7x3.5x3 rear

Motors) Turnigy AIR (L2215J) 900kV front, Turnigy AIR (L2210A) 1650kV rear

ESCs) HK-F20A x4 ( stock firmware )

LiPo) Nano-Tech 2200mAh 35-70C
heli-yeah is offline Find More Posts by heli-yeah
Last edited by heli-yeah; Jan 13, 2013 at 08:48 PM.
Reply With Quote
Sign up now
to remove ads between posts
Old Oct 18, 2012, 10:02 PM
THE PUBLIC IS THE PROBLEM
subaru4wd's Avatar
United States, CA, Sacramento
Joined Aug 2012
3,294 Posts
I am planning on converting my tri-copter into a V-Tail. Can you get some close-up pics of the tail mounted to your rear arm??

Great build btw! Any plans of some video of it in flight?
subaru4wd is online now Find More Posts by subaru4wd
Reply With Quote
Old Oct 19, 2012, 12:02 AM
serial scratchbuilder
Granted's Avatar
Canada, BC, Mission
Joined Sep 2012
1,300 Posts
Tail mounts look tig-welded to the rear boom. I want to know more of the rigs vital statistics if you please.
Granted is offline Find More Posts by Granted
Reply With Quote
Old Oct 19, 2012, 12:06 AM
THE PUBLIC IS THE PROBLEM
subaru4wd's Avatar
United States, CA, Sacramento
Joined Aug 2012
3,294 Posts
I dont see any weld beads. It appears as if the rear V Plate enter the center of the rear arm, and are bolted on in some way.
subaru4wd is online now Find More Posts by subaru4wd
Reply With Quote
Old Oct 19, 2012, 12:38 AM
serial scratchbuilder
Granted's Avatar
Canada, BC, Mission
Joined Sep 2012
1,300 Posts
You're right, I was looking at the top-down shots.
Granted is offline Find More Posts by Granted
Reply With Quote
Old Oct 19, 2012, 01:47 AM
<Marty>
United States, KY, Springfield
Joined Jul 2011
1,774 Posts
im a bit curious on what settings is used for a v-tail setup on the control board? is there a setting in the firmware for v-tail or does it just use a quad-x configuration?

thanks...
magic_marty is online now Find More Posts by magic_marty
Reply With Quote
Old Oct 19, 2012, 02:55 AM
serial scratchbuilder
Granted's Avatar
Canada, BC, Mission
Joined Sep 2012
1,300 Posts
Quote:
Originally Posted by magic_marty View Post
im a bit curious on what settings is used for a v-tail setup on the control board? is there a setting in the firmware for v-tail or does it just use a quad-x configuration?

thanks...
I believe Y-4 config is used.
Granted is offline Find More Posts by Granted
Reply With Quote
Old Oct 19, 2012, 07:46 AM
Flying Monkey
heli-yeah's Avatar
Lexington, KY
Joined Aug 2010
307 Posts
@ subaru4wd

I hope to get some flight footage up soon... Here are a some pics of the tail. ( I still need to do some trimming, and add another bolt )

Name: Picture 3.jpg
Views: 434
Size: 119.4 KB
Description: Name: Picture 2.jpg
Views: 387
Size: 83.7 KB
Description: Name: Picture 1.jpg
Views: 402
Size: 83.3 KB
Description: Name: Picture 4.jpg
Views: 375
Size: 85.7 KB
Description:

Quote:
Originally Posted by Granted View Post
Tail mounts look tig-welded to the rear boom. I want to know more of the rigs vital statistics if you please.
The V-arms are bolted to the tailboom, and I still need to work it up a bit for aesthetics... The whole frame in fact needs prettying up IMO!

Quote:
Originally Posted by magic_marty View Post
im a bit curious on what settings is used for a v-tail setup on the control board? is there a setting in the firmware for v-tail or does it just use a quad-x configuration?

thanks...
The updated firmware for the KK2 (v1.1) has a pre-mixed V-tail option, I just had to swap the outputs to the rudder, I have added some SPECS to the first post.
heli-yeah is offline Find More Posts by heli-yeah
Reply With Quote
Old Oct 20, 2012, 02:39 PM
Enjoy Life B4U Die!
Buzz_Man's Avatar
United States, GA, Powder Springs
Joined Dec 1999
4,207 Posts
Love the craftsmanship & design - best of luck with the maiden
Buzz_Man is online now Find More Posts by Buzz_Man
Reply With Quote
Old Oct 23, 2012, 07:18 AM
Flying Monkey
heli-yeah's Avatar
Lexington, KY
Joined Aug 2010
307 Posts
Here is some video I got of a hover session in my front yard. The neighborhood kids showed up so I had to cut it short.

The video quality is crap (sorry), but you can still get an idea of the flight, and handling characteristics of my build.

Custom Sweptback V-Tail Multi-rotor (2 min 18 sec)
heli-yeah is offline Find More Posts by heli-yeah
Reply With Quote
Old Oct 23, 2012, 08:59 AM
Registered User
Newnan, GA
Joined Oct 2002
2,087 Posts
Is it dipping when you apply yaw control? How would you compare the flight characteristics to a standard Tri copter?
Matt Chester is offline Find More Posts by Matt Chester
RCG Plus Member
Reply With Quote
Old Oct 23, 2012, 09:39 AM
Registered User
Joined Sep 2012
22 Posts
Very cool. I've been gathering parts to do something very much like this. I was going to run 11 or 12's in the front, and dual 5's in the rear. I was calling it an asymmetric v-tail.

Looks like you beat me to it! Very cool.


edit:

Couple of thoughts... 3 blade props in the rear huh? I'm going with a 5x3 2 blade prop for the rear. Have you played with the angle of the V much? What do you think the weight split is? I was planning on weighting mine so the bulk of the weight will be on the front, larger props, and then tail would carry relatively little weight.
Ducati777 is offline Find More Posts by Ducati777
Last edited by Ducati777; Oct 23, 2012 at 09:46 AM.
Reply With Quote
Old Oct 23, 2012, 09:50 AM
Flying Monkey
heli-yeah's Avatar
Lexington, KY
Joined Aug 2010
307 Posts
Quote:
Originally Posted by Matt Chester View Post
Is it dipping when you apply yaw control?
Yes a little! I will mix it out at some point.

Quote:
How would you compare the flight characteristics to a standard Tri copter?
IDK, I have never flown a Tri-copter.
heli-yeah is offline Find More Posts by heli-yeah
Reply With Quote
Old Oct 23, 2012, 10:06 AM
Flying Monkey
heli-yeah's Avatar
Lexington, KY
Joined Aug 2010
307 Posts
Quote:
Originally Posted by Ducati777 View Post
Very cool. I've been gathering parts to do something very much like this. I was going to run 11 or 12's in the front, and dual 5's in the rear. I was calling it an asymmetric v-tail.

Looks like you beat me to it! Very cool.


edit:

Couple of thoughts... 3 blade props in the rear huh? I'm going with a 5x3 2 blade prop for the rear. Have you played with the angle of the V much? What do you think the weight split is? I was planning on weighting mine so the bulk of the weight will be on the front, larger props, and then tail would carry relatively little weight.
Thank you!

I will be trying some 7" 2-blade props when I can make another order to GLB.

I have tweaked the V angles slightly inward, and outward, but I think it flies/yaws well at 90*, so I will leave it as is for now...

I'm not sure about the weights, but with mindful placement of electronic, and some beefier front arms (1/2" C-channel, instead of the current 3/8"), the CG should arrive at dead center.
heli-yeah is offline Find More Posts by heli-yeah
Reply With Quote
Old Oct 27, 2012, 12:27 PM
Flying Monkey
heli-yeah's Avatar
Lexington, KY
Joined Aug 2010
307 Posts
Here is another video! This one is a little better quality than the first, and shows more of what this thing is capable of. Enjoy!!!

V-Tail Tri-copter Testing (7 min 12 sec)
heli-yeah is offline Find More Posts by heli-yeah
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Forward-swept wing + V tail Design mixjsj Scratchbuilt EDFs 24 Jan 05, 2014 08:40 PM
Sold Stratos SL V-Tail, Receiver Ready w/wing bag/fuse bag & V-tail covers $400 LPU LowWatts Aircraft - Sailplanes (FS/W) 5 Aug 10, 2012 11:19 PM
Discussion Forward swept wing + V tail Design mixjsj Scratchbuilt EDFs 34 Aug 08, 2012 08:34 PM
Discussion Swept Wing Biplane/New Design Flyin' Happy Foamies (Scratchbuilt) 26 Jul 08, 2012 02:26 PM
Discussion Merits of X-tail V T-tail V V-tail for visibility flyonline Slope 16 Mar 01, 2008 08:27 AM