Micro V-Tail

By DannerD3H on Apr 06, 2020

8  396  10

Design is finished - 3D printning a prototype
It still has not been build. I will update this post as the project moves along.


Changelog:
April 06 2020:
Build created and initial design presented

April 08 2020:
Big design change - Decided that I wanted to make room for the Caddx Vista in case I ever buy HD. This is done by making room for two 20x20 stacks next to each other (it also has 16.5x16.5 holes). And you can aslo center mount a 20x20 or 16.5x16.5 for a clean simple build.
The new design is also 5 mm lower -> better CG

April 23 2020:
Time Flies..
Rather big update once again.
Dropped stac height to 17 mm (15 mm standoff plus 2 mm spacer and the tail mount).
Moved the rear arm assembly under the top plate for a cleaner looking frame.
Redesigned the cam guard for a cooler design and incorporated T-style antenna. The new cam guard should position the drone in a neutral angle on a flat surface (no forward motion from takeoff)
Redesigned Motor bumpers on arms
Ditched the idea of sub 250g. The rules in DK are no different for a powerfull 250g drone anyway.. use a smaller bat if you want it below 250g.
I think the design is close to final now

April 30 2020:
First iteration of the design is done!
Last renders have been added here to the build.
Next step is to build a prototype!


Tasks:
-Find a catchy name... Any ideas?
-3D print a prototype to ensure that electronics and wires fit


MICRO - V-Tail

I always loved the more unique types of multirotors especially V-Tails! I never tried flying one thuogh..
Also i do not have much space where I live so micros and whoops are more my kind of thing.. Finding a modern 2-3in V-tail frame is not easy.. V-tails also seem like a dying breed..

BUT I do not take no for an answer!

So this will be my first custom frame!! :D
Some design goals:
-A powerfull 3" V-Tail build for reckless flying.
-Keep COG as close to propeller plane as possible.
-Keep weight destribution as compact as possible
-No structural parts made of 3D print!!!
-Slightly rearward pointed tail motors for increased forward speed at reduced pitch.
-Prop free view
Micro size cameras
Room for Caddx Vista

Photos

Discussion

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1Smug_Bastard   Apr 06, 2020  

So whats the advantage here compaired to a normal quad?

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1Smug_Bastard   Apr 07, 2020 
1

You should build a 3" Whirlygig with 1103-10000kv motors @ 2S. Its performance will surprise you and definetly would be something unique to add to your collection.

This week i will start builing an inverted 3" Whirlygig with 1104-4500kv motors @ 4S. I had made one previously but sold it shortly after performing the base tune. (Its on Rotorbuilds) The little copter flew like a bat outa hell, even with its motor scaling set to 50%.

DannerD3H   Apr 07, 2020 
1

Oh yes i saw the video of that one! Or was it the normal one?
But I sure will get me a micro tricopter as well Once the V-Tail is flying!
I really like yours!

1Smug_Bastard   Apr 07, 2020 

Most of the videos are of the 2S Whirlygigs. Their very light and pretty simple to build as the Servo can directly connect to the Lipo. (16v 100 uf capacitor added in-line for filtering) Hence with the direct-connect, it removed the need for the secondary 7.4V BEC's used on the 4S builds.

I beleive theres still a video of the 4S on YouTube from last year. Though to be honnest, I was a bit disapointed with the 4S results. Simply put, the 1st 4S had a crappy camera that I wanted to step away from but flew like a missle @ 30% motor scaling. (Hard to control at that speed) The 2nd 4S with Emax 1106 motors (6-7 grams each) was overly heavy and thus tended to over-draw the battery when taken above 50% throttle. The 3rd build (Sold this one) with Emax 1108 motors (7-8 grams each) had a similar issue around 60-70% throttle but is much lighter overall. Despite this, all the builds had an ungodly TWR for such little things. (7 or 8:1 TWR) Saying this made tuning quite a challenge would be an underestatement. (They litterally scream at higher throttle settings)

V1 4S Whirlygig: https://rotorbuilds.com/build/18331
V2 4S Whirlygig: https://rotorbuilds.com/build/18949
V3 4S Whirlygig: https://rotorbuilds.com/build/20766

With the upcomming build, I'm hoping that the Xing 1104 motors will do the trick this time around as they have a much lower current draw and come in at 4-5 grams each. Its possible that change from the Emax mini 3" props to 2-bladed 3025's would help as well. Those 3025's are what I currently use on the 2S builds but I fear that using them with the 4S would cause the props tp flex horribly at full throttle.

Sasquads   Apr 06, 2020  

Dude
That's such a cool idea
I build a big one
https://rotorbuilds.com/build/11629
flew awesome, yaw authority is superb, watch this


and do notice what he says about the rear motor angle
if you go for 45 degrees, it does not fly that well
30 - 35 degree angle for rear motors is ideal, just take it into consideration
I mean, the guy (simplecopter) experimented
Big thumbs up and I definetily want one of the frames
I'll pimp it like I always do, check my profile

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DannerD3H   Apr 06, 2020 

Thanks! :D
The plan is that it will be available for purchase/selfcut Once finished :D

Saw that video actually, thats why my motors are tilted 31 degrees xD

Damn you have a lot of copters! :O
Any golden tips on edge painting carbon frames like almost All yours? :D

Sasquads   Apr 06, 2020 
1

cool 31 degrees allready, you are not kidding
I've been waiting for this
I used ordinary spray paint and taped the top and bottom of the frame
but started using markers, Molotow has cool colors and then spray farnish over it, so it sticks

DannerD3H   Apr 07, 2020 

No not at all :D
Hopefully can get the parts and 3D print a frame prototype next month. Then revise the frame and order it!

Thanks for the tips :)

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