30% SD Yak CG

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JeeUm · 03-01-2007, 10:21 PM

What are you guys flying yours at? The manual states 6.5" and mine is wicked tail heavy at that position. Before I start moving stuff I'd like to know what the sweet spot is for this.

flying232 · 03-01-2007, 10:43 PM

Just finished one up for my son and going to test fly on sunday. ours also was very tail heavy so we balanced dead center on the wing tube to start. I have heard this is a good starting place. What engine are you using? WE have the 3w 55I on his.
Mike
Mike's Custom R/C

3ddd · 03-01-2007, 11:03 PM

jeeum i have been flin mine for a year now at the 6.5 cg and it could be at 6.75 is what i am going to try this year.but it flys really smooth at 6.5 with just a touch of down for inverted flight

JeeUm · 03-01-2007, 11:12 PM

ZDZ 50. I don't know how I'm going to get this to balance

3ddd · 03-01-2007, 11:15 PM

jeeum here was my doin,i put two 2700 nicad packs stacked in front of the wing tube and put a 2700 nimha on the side of the motor box.i used the nicads for the big wheight and the power of them can't be beat if you need the wheight.now all this was for a 3w 50

flying232 · 03-01-2007, 11:19 PM

we are running 2 2400ma fromco and had to put both of them on the motor box just infront of f1 and this balanced it perfect. Hope this helps
mike

yakattack · 03-01-2007, 11:43 PM

Mine balances at 7.5 and I love the way it flys.

freya1 · 03-01-2007, 11:51 PM

Here is what I did. At first I even had to use the spinner to get it to balance, later I removed the spinner and I liked it better,

JeeUm · 03-02-2007, 01:31 AM

Ok, got it to balance at 7" by moving the pack and putting the stock spinner back on it. Of course I still can't fly it now because the prop bolts that ZDZ uses are too short when using a vess prop w/ spinner. Only 1/8" protruding out the back. And to top it all off, one of them sheared off in the hub while tightening it (no, I didn't over tighten). The bolt material seems very weak.

JeeUm · 03-02-2007, 01:33 AM

	Quote: Originally Posted by freya1
	Here is what I did. At first I even had to use the spinner to get it to balance, later I removed the spinner and I liked it better,

That's pretty much how mine is setup also.

Black Bird · 03-02-2007, 09:03 AM

Excuse me JeeUm, but I have a quick question. Are you sure you don't want to put any padding under that Fromeco Reg. I am concerned about vibration and reg failure. I have the same Reg, are you convident that they can handle vibration?

Vic3D · 03-02-2007, 09:06 AM

	Quote: Originally Posted by Black Bird
	Excuse me JeeUm, but I have a quick question. Are you sure you don't want to put any padding under that Fromeco Reg. I am concerned about vibration and reg failure. I have the same Reg, are you convident that they can handle vibration?

If you notice, he used grommets under the mounting screws to shock mount it.

leeMcCrory · 03-02-2007, 09:32 AM

Been wondering how somone turns into a Edge Hater? Is it through the love of a Yaks precision and tracking?

JeeUm · 03-02-2007, 01:17 PM

	Quote: Originally Posted by Black Bird
	Excuse me JeeUm, but I have a quick question. Are you sure you don't want to put any padding under that Fromeco Reg. I am concerned about vibration and reg failure. I have the same Reg, are you convident that they can handle vibration?

Your right, they can't handle it. I had one fail when I first started using them cause I hard mounted it after someone told me it was ok. Like Vic said, I use fuel tubing to isolate it and knock on wood it's been working fine in several airplanes now without a problem.

**wizard** · 03-02-2007, 03:01 PM

I had to do the same thing on mine. Ignition battery and reg on the engine box, Rx and Rx battery as close to the wing tube as I could get it. Used the spinner that came with it. Mine balances right at the back edge of the wing tube.

03-01-2007, 10:21 PM	#1
JeeUm . Join Date: Jan 2006 Posts: 4,100 Awards Showcase Total Awards: 3	30% SD Yak CG What are you guys flying yours at? The manual states 6.5" and mine is wicked tail heavy at that position. Before I start moving stuff I'd like to know what the sweet spot is for this.

03-01-2007, 10:43 PM	#2
flying232 Gettin' Lower! Join Date: May 2006 Location: springdale, arkansas Posts: 38	Re: 30% SD Yak CG Just finished one up for my son and going to test fly on sunday. ours also was very tail heavy so we balanced dead center on the wing tube to start. I have heard this is a good starting place. What engine are you using? WE have the 3w 55I on his. Mike Mike's Custom R/C

03-01-2007, 11:03 PM	#3
3ddd tissue ? cry baby jack wagon! Join Date: Jan 2006 Location: pyote,texas Age: 58 Posts: 2,649	Re: 30% SD Yak CG jeeum i have been flin mine for a year now at the 6.5 cg and it could be at 6.75 is what i am going to try this year.but it flys really smooth at 6.5 with just a touch of down for inverted flight __________________ Life's journey is not to arrive at the grave >safely and in a well preserved body,but rather to skid in > sideways,totally screwed up,worn out,shouting,"oh damn what a fine ride! AMA 98634 > HEY I GOT A DIVORCE----HELL YEA > Futaba, FROMECO:a good way to get a charge out of life,,3w all the way for a good day

03-01-2007, 11:12 PM	#4
JeeUm . Join Date: Jan 2006 Posts: 4,100 Awards Showcase Total Awards: 3	Re: 30% SD Yak CG ZDZ 50. I don't know how I'm going to get this to balance

03-01-2007, 11:15 PM	#5
3ddd tissue ? cry baby jack wagon! Join Date: Jan 2006 Location: pyote,texas Age: 58 Posts: 2,649	Re: 30% SD Yak CG jeeum here was my doin,i put two 2700 nicad packs stacked in front of the wing tube and put a 2700 nimha on the side of the motor box.i used the nicads for the big wheight and the power of them can't be beat if you need the wheight.now all this was for a 3w 50 __________________ Life's journey is not to arrive at the grave >safely and in a well preserved body,but rather to skid in > sideways,totally screwed up,worn out,shouting,"oh damn what a fine ride! AMA 98634 > HEY I GOT A DIVORCE----HELL YEA > Futaba, FROMECO:a good way to get a charge out of life,,3w all the way for a good day

03-01-2007, 11:19 PM	#6
flying232 Gettin' Lower! Join Date: May 2006 Location: springdale, arkansas Posts: 38	Re: 30% SD Yak CG we are running 2 2400ma fromco and had to put both of them on the motor box just infront of f1 and this balanced it perfect. Hope this helps mike

03-01-2007, 11:43 PM	#7
yakattack DONT TOUCH MY PLANE Join Date: Jan 2006 Location: Harrisonburg,VA Posts: 217	Re: 30% SD Yak CG Mine balances at 7.5 and I love the way it flys.

03-01-2007, 11:51 PM	#8
freya1 Doo It! Doo It! Join Date: Jan 2006 Location: Modesto, Ca. USA Posts: 95	Re: 30% SD Yak CG Here is what I did. At first I even had to use the spinner to get it to balance, later I removed the spinner and I liked it better, Attached Thumbnails 123.3 KB · Views: 27 135.5 KB · Views: 36 117.8 KB · Views: 27 __________________ "I don't drive fast, I fly low"

03-02-2007, 01:31 AM	#9
JeeUm . Join Date: Jan 2006 Posts: 4,100 Awards Showcase Total Awards: 3	Re: 30% SD Yak CG Ok, got it to balance at 7" by moving the pack and putting the stock spinner back on it. Of course I still can't fly it now because the prop bolts that ZDZ uses are too short when using a vess prop w/ spinner. Only 1/8" protruding out the back. And to top it all off, one of them sheared off in the hub while tightening it (no, I didn't over tighten). The bolt material seems very weak.

03-02-2007, 09:03 AM	#11
Black Bird on a vacation Join Date: Mar 2006 Location: Utopia Posts: 1,150	Re: 30% SD Yak CG Excuse me JeeUm, but I have a quick question. Are you sure you don't want to put any padding under that Fromeco Reg. I am concerned about vibration and reg failure. I have the same Reg, are you convident that they can handle vibration?

03-02-2007, 09:32 AM	#13
leeMcCrory lee Join Date: Jan 2006 Location: Bristol. England Age: 38 Posts: 728	Re: 30% SD Yak CG Been wondering how somone turns into a Edge Hater? Is it through the love of a Yaks precision and tracking?

03-02-2007, 03:01 PM	#15
wizard It will fly!!! Join Date: Jan 2006 Location: Washington, Indiana Age: 48 Posts: 9,044 Awards Showcase Total Awards: 3	Re: 30% SD Yak CG I had to do the same thing on mine. Ignition battery and reg on the engine box, Rx and Rx battery as close to the wing tube as I could get it. Used the spinner that came with it. Mine balances right at the back edge of the wing tube. __________________ Prevent Darwinism become a paramedic!!! Never try to teach a pig to sing! It wastes your time and it annoys the pig!!! Do not argue with an idiot. He will drag you down to his level and beat you with experience. Powered by Jim Beam

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