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Old Today, 08:01 AM
Team Twisted!
Benton3dflying's Avatar
Joined Aug 2012
247 Posts
Crack Yak 39 inch by Twisted Hobbys Airplane (4 min 9 sec)


I wanted to give my flying impressions of the new crack yak 39" from flying it for the first time yesterday. After the first 15 seconds, I told my Dad "wow, this thing flies great!" The first thing I noticed was how it tracked, not much movement. The roll rate is pretty ballistic. The hover is pretty hands off. And the knife edge did not require hardly any rudder at all. There was plenty of power to do rolling loops. This plane has good handling at low speed and high speed handling as well. This is a beginner or advanced plane. I even think that the larger planes like this one are easier to fly. The plane I was flying was on the stock power combo( TMW 2212-970) This motor is awesome, which is running a 10 by 4.7 prop. I also was amazed at the flight time I was getting on the batteries. My build position the battery directly over the spar. I used 3 cell batteries. The Twisted Hobbys brand 750 mah and 850 mah were used. I really couldn't tell the difference between the two.
But noticed after flying for 5 minutes I still had 50% of the capacity on the battery tester, meaning I could have flown for minutes longer. I look forward to many more flights with the new Crack Yak.
Benton
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Last edited by Benton3dflying; Today at 08:08 AM.
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Old Today, 08:27 AM
Whatever goes up must go BOOM
joker24458's Avatar
United States, OH, Kent
Joined Mar 2012
2,083 Posts
I want this thing! 39 inches of Crack goodness. Digging the grey scheme. Price point is a bit steep though......so not sure when I will be able to give in......

-Andres
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Old Today, 09:05 AM
Registered User
United States, CO, Fort Collins
Joined Jan 2014
274 Posts
Quote:
Originally Posted by Slickx View Post
Thanks, I know that it will be less perfect than with a balsa plane, therefore I want to ask, which is the best. Some are better pattern flyers, some are more on the crazy side and you can't see much tumbles in the videos to judge it. I think the MXS is really close to my demands (high speed, crazy 3D and tumbles), but I want it bigger with more high wind capability.

I don't have a hobby room to repair a balsa plane, so for the moment EPP is the best way to go.
I'm not sure which one you would want to go with since I prefer the slower lower wing loading of the RC-Factory planes. I do more of the slow and low 3D. If I were you I would look into the the higher wing loading (more mass) of the Telink planes sold at Twisted Hobbys. I have flown a few and they fly more like a balsa plane and faster.
http://twistedhobbys.com/EPP-Planes-47-48_c68.htm

http://twistedhobbys.com/EPP-Planes-43-44_c37.htm
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Old Today, 10:50 AM
TEAM TWISTED
ROLLING CIRCLE's Avatar
United States, MD, Middle River
Joined Dec 2011
941 Posts
Quote:
Originally Posted by Slickx View Post
Many Twisted Team members are posting here day by day ... ok last try before I give up. Please could you be so kind to answer my questions?
In terms of 32" 9MM EPP planes from Twisted, none tumble as well as the MXS-C. The standard Crack Yak is a close secoond place in this category.



Now, Benton, killer video buddy! Looking good on the 1MCY. Thanks for posting your though. Getting some 850s as we speak!
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Old Today, 10:55 AM
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jimbo320's Avatar
Joined May 2011
3,613 Posts
Quote:
Originally Posted by Aerobatic Addict View Post
Just saw this on youtube.
http://youtu.be/bTNHyQIEJgY
Now this i LIKE!
Just what ive been waiting for!
Does the model have a flat or a profiled wing.
Cheers,
J.
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Old Today, 11:07 AM
Registered User
United States, CO, Fort Collins
Joined Jan 2014
274 Posts
Quote:
Originally Posted by ROLLING CIRCLE View Post
In terms of 32" 9MM EPP planes from Twisted, none tumble as well as the MXS-C. The standard Crack Yak is a close secoond place in this category.



Now, Benton, killer video buddy! Looking good on the 1MCY. Thanks for posting your though. Getting some 850s as we speak!
He is looking for a 43"-48".
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Old Today, 12:31 PM
Team Extreme! Team Twisted!
hercdriver7777's Avatar
Columbia SC
Joined Feb 2005
4,327 Posts
Great flying as always Benton! Beautiful job!
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Old Today, 01:54 PM
TEAM TWISTED
ROLLING CIRCLE's Avatar
United States, MD, Middle River
Joined Dec 2011
941 Posts
Quote:
Originally Posted by Aerobatic Addict View Post
He is looking for a 43"-48".
Then the answer is still "No." If you want to do nasty tumbles on a 48" plane, go balsa and fly it a little heavier than spec. I have a 51" Slick that can get so wadded up (as Joe would say) that it's just silly.
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Old Today, 02:03 PM
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jcansdale's Avatar
United Kingdom, Gunnerton
Joined Dec 2010
1,024 Posts
Quote:
Originally Posted by Slickx View Post
Thanks, I know that it will be less perfect than with a balsa plane, therefore I want to ask, which is the best. Some are better pattern flyers, some are more on the crazy side and you can't see much tumbles in the videos to judge it. I think the MXS is really close to my demands (high speed, crazy 3D and tumbles), but I want it bigger with more high wind capability.
What kind of maneuvers do you mean when you say tumbles? Is the knife edge spin classed as a tumble?
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Old Today, 03:09 PM
Romans 8:34-39
bhoov128's Avatar
United States, FL, Davenport
Joined May 2012
8,268 Posts
KE Spin is the only one I've gotten down pat with my MXS-C (and it's slow and floaty looking and kinda funny) but it torqued the prop on the prop saver band and started slapping foam so I chopped the throttle.
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Old Today, 03:47 PM
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ROLLING CIRCLE's Avatar
United States, MD, Middle River
Joined Dec 2011
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Quote:
Originally Posted by jcansdale View Post
What kind of maneuvers do you mean when you say tumbles? Is the knife edge spin classed as a tumble?
Jamie. Not really. Tumble is a general term. There is no one "Tumble."

I think of them as more disorganized end over end things that happen as you release a lot of inertia/momentum and just let the plane fall through a serious of movements that you may, or may not, be offering stick inputs for.

Things that could be considered a form of tumble but yet are so organized that they require certain inputs are: Crank Shaft, Pop Tops, Lombshevok (sp?), Swiebeltorm (?)... In a tumble, the center of mass is pulling the rest of the plane against the drag on the surfaces etc, and through positions that are un-natural. That's why foamies are NOT usually good at tumbling. They are built to be light and to float. As a result, the tumbles don't look very violent.
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Old Today, 04:19 PM
Romans 8:34-39
bhoov128's Avatar
United States, FL, Davenport
Joined May 2012
8,268 Posts
First - Nice job Chris, the big Yak looks really sweet.

Quote:
Originally Posted by bhoov128 View Post
So apparently it's a great big airfoiled Crack Yak with a t-canalizer?
What do I win!?!?!

Quote:
Originally Posted by ROLLING CIRCLE View Post
Jamie. Not really. Tumble is a general term. There is no one "Tumble."

I think of them as more disorganized end over end things that happen as you release a lot of inertia/momentum and just let the plane fall through a serious of movements that you may, or may not, be offering stick inputs for.

Things that could be considered a form of tumble but yet are so organized that they require certain inputs are: Crank Shaft, Pop Tops, Lombshevok (sp?), Swiebeltorm (?)... In a tumble, the center of mass is pulling the rest of the plane against the drag on the surfaces etc, and through positions that are un-natural. That's why foamies are NOT usually good at tumbling. They are built to be light and to float. As a result, the tumbles don't look very violent.
Lomcevak! History behind is a Czech pilot did the maneuver for the first time and journalists asked "What is that called?" to which "lomcevak" was the reply. Lomcevak's meaning? From Wikipedia: "The expression LomcovŠk is commonly used in Moravia to describe the rotating motions of one who has had one drink too many of its famous alcoholic drink slivovitz."

And actually planes that have their weight distributed about the ends of the planes - like heavy motor up front and heavy servos in the tail - would be better at tumbling because each end carries its own inertia. It'll tumble much less spectacularly if the weight is all close in to the CG.
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Old Today, 05:46 PM
Registered User
jcansdale's Avatar
United Kingdom, Gunnerton
Joined Dec 2010
1,024 Posts
Quote:
Originally Posted by ROLLING CIRCLE View Post
Jamie. Not really. Tumble is a general term. There is no one "Tumble."

I think of them as more disorganized end over end things that happen as you release a lot of inertia/momentum and just let the plane fall through a serious of movements that you may, or may not, be offering stick inputs for.

Things that could be considered a form of tumble but yet are so organized that they require certain inputs are: Crank Shaft, Pop Tops, Lombshevok (sp?), Swiebeltorm (?)... In a tumble, the center of mass is pulling the rest of the plane against the drag on the surfaces etc, and through positions that are un-natural. That's why foamies are NOT usually good at tumbling. They are built to be light and to float. As a result, the tumbles don't look very violent.
Thanks for the very clear explanation.

The reason I ask is because the original poster wrote the following:

Quote:
Originally Posted by Slickx View Post
The new MXS-C seems to tumble very well for a small EPP foamy. Is any of the bigger TH planes comparable to the MXS?
I've seen the MXS-C do awesome KE spins, but I'm wondering if it can do any genuine tumbling maneuvers?
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