FlyingGiants - View Single Post - Any SD Model 33% yak owners out there...?

juanes1969 · 11-28-2007, 08:46 AM

Jason:
I have the same plane with a 3W 85xi in it. I have a ZDZ80RV that I installed in it when new, but I could not get it to balance with that engine. However, I did have a lot of weight in the back ( aluminum stab tube, two futabas 9153`s on rudder that are heavier than the standard servos) The plane only needs about 380 oz. of torque on the rudder to fly it with authority. So, if you only use one 8711 on the rudder you`ll be saving some weight and it will be easier to balance. Prepare to install all the gear that you can on the front in order to balance with the 80RV.
It should be ballistic with that engine since it is almost 1 pound lighter that the 3Ws.
My plane has insane power, the 3W-85 is turning a mejzlik 26x10 at 6850 rpms! The ZDZ has a little less power, but it does have enough to hover it at 1/2 throttle and it doesn`t vibrate as much as the 3W does.
With the set up you have, you`ll love this plane.
Just use one 8711 on rudder, you`ll be able to do knike edge loops with that servo back there.
JM2C.

John

11-28-2007, 08:46 AM	#4
juanes1969 Gettin' Lower! Join Date: Jan 2007 Location: Tegucigalpa, Honduras Posts: 64	Re: Any SD Model 33% yak owners out there...? Jason: I have the same plane with a 3W 85xi in it. I have a ZDZ80RV that I installed in it when new, but I could not get it to balance with that engine. However, I did have a lot of weight in the back ( aluminum stab tube, two futabas 9153`s on rudder that are heavier than the standard servos) The plane only needs about 380 oz. of torque on the rudder to fly it with authority. So, if you only use one 8711 on the rudder you`ll be saving some weight and it will be easier to balance. Prepare to install all the gear that you can on the front in order to balance with the 80RV. It should be ballistic with that engine since it is almost 1 pound lighter that the 3Ws. My plane has insane power, the 3W-85 is turning a mejzlik 26x10 at 6850 rpms! The ZDZ has a little less power, but it does have enough to hover it at 1/2 throttle and it doesn`t vibrate as much as the 3W does. With the set up you have, you`ll love this plane. Just use one 8711 on rudder, you`ll be able to do knike edge loops with that servo back there. JM2C. John