Twisted Hobbys - Crack Yak Mini - Build Thread - RC Groups
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Dec 10, 2012, 04:53 PM
Team Extreme! Team Twisted!
hercdriver7777's Avatar

Twisted Hobbys - Crack Yak Mini - Build Thread

Welcome to the Crack Yak Mini!

Here's a link to the Twisted Store:

This time around we are going to do the build thread a little differently. Instead of having all of the build info crammed into this first post with only myself moderating it, this first post will cover the main points of the Mini as well as link to an extensive build video. I will update this post with airframe specific data as it evolves.

The second post will cover Flight video from CWojcik. Cody will keep his post updated with the best Mini vids that hit the street.

In the third post Cdee will upload the manual containing all of the build pics and instructions. All of the build updates, manual changes and build notes will be updated in this post.

So, we will still have all of the info on the front page as usual but now it will be a little easier to follow and for us to manage.

The Crack Yak Mini is the most high performance 3D and Xtreme Aerobatic small EPP plane on the market! The Mini evolved out of our quest for a small super high-performance plane that could be flown literally anywhere, in any space, yet improve on the over the top performance of the original Crack Yak. Through our extensive design and testing program over the last year we have honed in on the exact wing loading, power to weight ratio and developed the new airframe tweaks needed to excel in this smaller size. The result is going to be the most fun plane that you have had!

With the original Crack Yak I wanted to make a plane that wasn't your average floaty EPP 3D plane and really put together something that would be exciting to fly, precise, and very wild and crazy when you wanted it to be. In the design process for that plane we really learned a lot about what happens to airframe tweaks and designs when you scale them down, reduce surface efficiency and increase wing loading while you do it. That "research" resulted in an airframe that maximized the effects of it's wing loading and had airframe features that functioned extremely well in an inefficient flat plate small plane world.

With the Mini we capitalized on and exaggerated those design features to make a small plane that will really perform! From the very special designed single piece motor/esc combo to the trailing edge Variable Vortex Generators every effort was made to create an extremely high performance, very small pocket rocket!


Design Aspects:

Power to weight - One of the most disappointing things I have found with really small 3D planes is a general lack of power by modern XA standards. We went to extensive efforts to make sure that the Mini combo has more power than you will ever need. The combo has a unique Motor and ESC in one piece design and running on a 2S 150-250mah pack with the 7X3.5 GWS prop will give you more power than any sane person could want! Don't worry, you can always prop it down if it has too much punch for your liking.

Precision - One of the things I always wanted to improve on the original CY was the precision feel of it. With the Mini, we added Variable Vortex Generators (VVGs) to the trailing edge of the inboard ailerons to crisp up the control feel. You will find the ailerons to be more precise and effective. You will also find that extreme aileron throws will not overload the tail feathers as much as they did on the Crack Yak Lite. Oh yeah, it will roll like a damn bullet too!

Feel - Everyone knows what the Crack Yak is all about now but what makes this one different, and truly the key feature of this plane, is really about aircraft feel. If you like the insaneness of the original Crack Yak on 3S, you will LOVE the Mini. If you like to have a plane that will do "it" if you can think "it", you will LOVE the Mini. It really is an amazing tiny little plane that will out perform most other planes, in any size, yet it feels precise and clean in the air. So, what we are saying here is, not only are you getting a tiny little Mini size plane that will fly in very tight spaces but you are also not going to give up capability or feel in exchange. I would say you will actually improve capability and feel!


Wing span – 24” / Length – 25”
AUW 80 - 95g (with Landing Gear)
2000-2200kV out-runner motor (9g – 12g)
4 - 6 amp ESC
2s 180 – 250mAh battery
4 ch radio
2x 3.5g servos
1x 4.0g servo
6x3 to 7x3.5 prop
Build Video:

Twisted Hobbys - Crack Yak Mini (45 min 42 sec)



Mini 1 (1 min 7 sec)

Last edited by hercdriver7777; Dec 20, 2012 at 09:25 PM.
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Dec 10, 2012, 04:53 PM
Extremely Twisted
cwojcik's Avatar
Full flight video is here!

Crack Yak Mini Full Video (5 min 26 sec)
Last edited by cwojcik; Dec 10, 2012 at 06:57 PM.
Dec 10, 2012, 04:56 PM
Team Twisted!
cdee's Avatar
Current Manul Version: 2012.12.05.v002a

09/10/14-8:30p - Manual updated to version 2012.12.05.v002a - Completely new manual showing build with snap links

12/15/12-7:04a - Manual updated to version 2012.12.05.v001d - clarified parts list

12/13/12-9:34p - Manual updated to version 2012.12.05.v001c

12/10/12-8:34p - Manual updated to version 2012.12.05.v001b

12/10/12-5:20p - Manual (initial release 2012.12.05.v001a) can be down loaded from the Twisted Site if you want a peek, there are going to be a couple edits that happen, so you might wait before you print it out if that's what you were going to do.

12/10/12-2:56p - Reserved for Manual and Manual related information
Last edited by cdee; Sep 10, 2014 at 10:35 PM.
Dec 10, 2012, 05:05 PM
Twisted Do Nut!
KamikazePilot's Avatar

Way cool...

Really looking forward to it guys.
Dec 10, 2012, 05:12 PM
jimbo320's Avatar
Crack Yak Mini? Tell me more!
Dec 10, 2012, 05:15 PM
Twisted Do Nut!
KamikazePilot's Avatar
Originally Posted by jimbo320
Crack Yak Mini? Tell me more!
Where ya been jimbo? Been talking about it in the owners thread for the past few pages.
Dec 10, 2012, 06:07 PM
Don't give in to gravity
Gravitycheat's Avatar
Looks like a lot of fun guys!!! Can't wait
Dec 10, 2012, 06:25 PM
Team Twisted!
Benton3dflying's Avatar

Crack Yak Mini

Looks Great Chris and Cody!
Dec 10, 2012, 06:58 PM
Extremely Twisted
cwojcik's Avatar
Flight video is up!
Dec 10, 2012, 07:07 PM
3d addict
Can't wait to really sit down and go thru this thread once everything is posted. Woohoo. Ordering ASAP.
Dec 10, 2012, 07:09 PM
Team Extreme! Team Twisted!
hercdriver7777's Avatar
Originally Posted by cwojcik
Flight video is up!
Total awesomeness brother!
Dec 10, 2012, 07:09 PM
Registered User
I must have one...
Dec 10, 2012, 07:11 PM
Justin S
justinsebastian's Avatar
I'm in!
Dec 10, 2012, 07:13 PM
No one has more fun than me
aerosheldon's Avatar
I have a Pitts coming in but I am going to have to get an indoor place to fly for one of these. Looks very cool.
Dec 10, 2012, 07:15 PM
Twisted Do Nut!
KamikazePilot's Avatar
Damn nice flying there Cody. This is mine I tell ya! I'm itching for two of these little birds.

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