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All Forums >> RC Airplanes >> Profile and Fun Flying Planes >> OMP - Ohio Model Products Support Forum >> razor yak balancing
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razor yak balancing - 6/20/2009 9:20 PM   
edge540l


 

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From: fort plain, NY, USA
Status: offline 		just got a razor yah with a os 91fx,using hitec hs-625 on tail and jr 4131 on the ailerons,engine is as far forward and batt is in the left winf in front of the tube ,rx is behind the tube,why is it so tail heavy at 8.5" needs quite a bit of lead to get it to balance,besides moving the tail servos behind the wing what else can i do?


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RE: razor yak balancing - 6/20/2009 9:49 PM   
wessco


 

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From: Summerville, GA, USA
Status: offline 		Move the battery to the tank area.....


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RE: razor yak balancing - 6/20/2009 9:51 PM   
edge540l


 

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From: fort plain, NY, USA
Status: offline 		how do you do it without cutting the coverind,can you post a few pics,


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RE: razor yak balancing - 6/21/2009 1:54 AM   
edge540l


 

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From: fort plain, NY, USA
Status: offline 		still do not understand how to mount the battery with the tank as there is no place to put the wires need a pic posted test flight is scheduled in the morning,and its too tail heavy for me to be comfortable to fly it


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RE: razor yak balancing - 6/21/2009 10:41 PM   
wessco


 

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From: Summerville, GA, USA
Status: offline 		If you haven't  maidened it yet, how would you know it's too tail heavy to comfortably fly it?

You have to cut a hole in the leading edge sheeting and run your wires through the said hole.


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RE: razor yak balancing - 6/21/2009 11:43 PM   
edge540l


 

Posts: 159
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From: fort plain, NY, USA
Status: offline 		when you static balance it the tail just drops to the floor so that would tell me its tail heavy,so i did get the battery under the tank,took the thro servo out and fed the wires in the servo hole with the thro servo leads and put the servo back in so i did not have to cut another holr in the fuse.got 13 flights on it and it flies beautiful,a tad tail heavy but its more fun like that,hovers sweer and blenders are insane thanks omp for designing a sweet slab


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RE: razor yak balancing - 6/22/2009 2:37 PM   
AFSalmon



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Status: offline 		Edge, it sounds like you have it set just right for you.  13 flights and you like it...I'd say leave it just like that. 

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RE: razor yak balancing - 6/25/2009 5:02 AM   
doutcalt


 

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From: Delafield, WI, USA
Status: offline 		If you put heavy servos in the tail, the darn thing won't balance, without a heavy motor. to get down to lowest possible weight, tail servos have to be light, but with enough torque. I put relatively heavy servos in tail, and was forced to install the OS 91 way forward, but no lead.
Wisconsin

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RE: razor yak balancing - 6/25/2009 1:10 PM   
AFSalmon



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Status: offline 		Glad you got it balanced ok. The RY is a tough one to balance having the really short nose. It is the short nose and long tail with huge surfaces that give teh RY its unique flying characteristics. Some folks have moved the tail servos forward to aid in balancing.

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Ohio Model Planes

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RE: razor yak balancing - 6/29/2009 12:28 AM   
edge540l


 

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From: fort plain, NY, USA
Status: offline 		went flying sunday as it was a beautiful day,got together with a bunch of friends and went to a new strip,flew 4 tanks then went to the field where i always fly.last flight coming in to land was a bit short and the left wing tip caught some high grass and down it came.went to retrieve the wreckage and found only damage was the left wing rib next to the fuse came out and cracked the fuse where the lazar parts go together,took the covering off to find there was like no glue holding the pieces together no biggie just put some glue on the joints and ready for the covering

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RE: razor yak balancing - 6/29/2009 12:45 AM   
AFSalmon



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From: Beavercreek, OH,
Status: offline 		Hey they are built pretty tought but you are still not supposed to crash! Glad she is ok though.

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RE: razor yak balancing - 6/29/2009 1:49 AM   
edge540l


 

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From: fort plain, NY, USA
Status: offline 		i will agree with you on being built tough.it could have been alot worse but she is ready for the air again,30 min worth of work and good as new

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RE: razor yak balancing - 6/30/2009 12:56 PM   
AFSalmon



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quote:

ORIGINAL: edge540l

i will agree with you on being built tough.it could have been alot worse but she is ready for the air again,30 min worth of work and good as new


30 minutes repair is pretty quick actually! Takes me longer to clean the plane, grab a beer, drink the beer, and then start fixing!

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Ohio Model Planes

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RE: razor yak balancing - 7/1/2009 3:24 AM   
edge540l


 

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From: fort plain, NY, USA
Status: offline 		i have a gap between the wing and fuse on my razor yak,its just big enough to where i can slide a thin hobby ruler through,so is it ok to fly the plane like this or not

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RE: razor yak balancing - 7/1/2009 1:11 PM   
AFSalmon



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From: Beavercreek, OH,
Status: offline 		As long as your wing bolt is tight and there is no damage to the root ribs from your crash. Do a good inspection of the root rib joints and wick in CA to any suspect areas. Make sure your root rib is secure to all the sheeting, spars, and wind tube. Often times when you have a crash there might be damage in places you can't readily see.

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Ohio Model Planes

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RE: razor yak balancing - 8/3/2009 12:58 AM   
IowaSilvia


 

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From: Billings, MO, USA
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quote:

ORIGINAL: edge540l

just got a razor yah with a os 91fx,using hitec hs-625 on tail and jr 4131 on the ailerons,engine is as far forward and batt is in the left winf in front of the tube ,rx is behind the tube,why is it so tail heavy at 8.5'' needs quite a bit of lead to get it to balance,besides moving the tail servos behind the wing what else can i do?


8.5" back is the sweet spot. A lot of people like to fly it at 8.75 or even 9.

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