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Old Dec 14, 2012, 03:43 PM
Gaui X3, Nano CPX (two)
BladeScraper's Avatar
United States, MO, KC
Joined Jun 2011
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So, I don't want to use big servo arms... got it. I'll just use the stock ones I am also definitely going to do everything I can to save weight.
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Old Dec 15, 2012, 02:29 PM
Gaui X3, Nano CPX (two)
BladeScraper's Avatar
United States, MO, KC
Joined Jun 2011
3,313 Posts
One more thing, about the offset differential arms, how do they work/why do you need them?
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Old Dec 15, 2012, 02:39 PM
I don't want to "Switch Now"
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Toronto (Don Mills), Canada
Joined Dec 2002
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The offset arm is done to eliminate the differential that would occur because of the way the pushrods angle out away from the servo. With the arm on the top like this model they will move more up than down.

Without them you will get more throw one way than the other and the rolls will not be axial.

So you only need them if you don't want the plane to roll properly

To get an idea how they work, imagine an extreme case with the pushrods out 90 degrees to the output arm. The control surface would only move up!
The idea is to get the line from the axis of rotation of the servo out to the hole in the arm to be at right angles to the pushrod. That gets you close to equal throws both ways. Not quite. but close.


Pat MacKenzie
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Old Dec 15, 2012, 03:47 PM
Gaui X3, Nano CPX (two)
BladeScraper's Avatar
United States, MO, KC
Joined Jun 2011
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Oh, thanks! Do the servos come with them or do you have to buy them?
Quote:
Originally Posted by pmackenzie View Post
The offset arm is done to eliminate the differential that would occur because of the way the pushrods angle out away from the servo. With the arm on the top like this model they will move more up than down.

Without them you will get more throw one way than the other and the rolls will not be axial.

So you only need them if you don't want the plane to roll properly

To get an idea how they work, imagine an extreme case with the pushrods out 90 degrees to the output arm. The control surface would only move up!
The idea is to get the line from the axis of rotation of the servo out to the hole in the arm to be at right angles to the pushrod. That gets you close to equal throws both ways. Not quite. but close.


Pat MacKenzie
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Old Dec 15, 2012, 03:50 PM
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Toronto (Don Mills), Canada
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You either have to buy them or make your own, they don't usually come with servos.

The kit might come with them, some do. FF mentions supplying them in their kits in the ad:

http://www.fancyfoam.com/index.php?m...products_id=69

You attach the offset arm to a stock arm. I use CA glue and some Kevlar thread wrap

Pat MacKenzie
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Old Dec 15, 2012, 06:59 PM
Gaui X3, Nano CPX (two)
BladeScraper's Avatar
United States, MO, KC
Joined Jun 2011
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Quote:
Originally Posted by pmackenzie View Post
You either have to buy them or make your own, they don't usually come with servos.

The kit might come with them, some do. FF mentions supplying them in their kits in the ad:

http://www.fancyfoam.com/index.php?m...products_id=69

You attach the offset arm to a stock arm. I use CA glue and some Kevlar thread wrap

Pat MacKenzie
Cool.
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Old Dec 18, 2012, 11:50 AM
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hey guys i just ordered my first vpp setup for my son from the fancyfoam website. i'll be building it soon but i'm already thinking ahead to what i think is going to be the trickiest part. radio setup. can anyone send me a link to a video/thread/post that can give a first timer some tips for basic setup? i have a dx8 and of course would love it if i could find a dx8 model file that i could download/import and just modify. any tips you guys have would be great
k.t.
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Old Dec 18, 2012, 10:51 PM
"Free" in Christ!
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Hope this helps,

Free

Aurora9 VPP (Variable Pitch Prop) Setup (6 min 38 sec)
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Old Dec 19, 2012, 07:03 AM
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thanks

thanks a bunch. that will get me started on the right track. looks like i should call on my heli friends when i start setting this up!
thanks again,
k.t.
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Old Dec 19, 2012, 09:01 AM
Gaui X3, Nano CPX (two)
BladeScraper's Avatar
United States, MO, KC
Joined Jun 2011
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hmm, service unavailable! Can't see it!
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Old Dec 19, 2012, 09:08 AM
"Free" in Christ!
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Google the name?

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Old Dec 19, 2012, 03:31 PM
Gaui X3, Nano CPX (two)
BladeScraper's Avatar
United States, MO, KC
Joined Jun 2011
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Never mind, the school network just figured out how i got onto YouTube...
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Old Dec 26, 2012, 07:17 AM
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build video for the mx2?

hey guys, has anyone made a good build video for the mx2? i'll be starting on my build during the next few weeks and i usually like to watch build video a few times before i build anything. i looked in this thread but didn't see one.
k.t
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Old Dec 26, 2012, 08:06 AM
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Warsaw & Gdynia, Poland
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http://store.higherplaneproductions.com/aj-vol1.html
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Old Dec 26, 2012, 08:50 AM
"Free" in Christ!
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I have not seen a free build vid for the MX-2, look at the link for some similar videos, the manual is good.

Free

http://tasfoamies.webs.com/buildvideos.htm
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