Aerobatic Performance Team
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ARF Reviews
Extreme Composite Edge 540T 50CC
product Reviews The Ladies Justina and Dietrich 42% Extra 260
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ARF Build Review- Dietrich Performance Aircraft 42% Extra 260 Fast Build
Distributed by Dietrich Performance Aircraft Review by "Rockin' Rick" Part 3-Power Panel, Regulator, Rudder Control Assembly, Horizontal Stab and Elevators
We've got things on a pretty good roll now so lets get the the Smart Fly Power Expander We'll be using the 14MZ power expander along with the Smart Fly Turbo Regulator in this application. I chose the Turbo regulator because of it's high amperage ability. It can supply 17.5 amps of current when the input voltage is 8.4V and the regulator is set to 6.0V output. Considering the number of servos that we'll be using in this plane, I think that's a reassuring margin of safety I can live with. I want the maximum power running to all the servos as needed, when needed. I thought about using the new Power Expander EQ10 that can adjust the servos also from the power expander, but I think it would be a lot more tedious due to the location of the controls for the servos on the power expander itself. I'll adjust my servos using my 12Z transmitter again this time. I've become a little more comfortable with this method as this is the third plane that I've used this technique on.
Both of the Hitec HS5955TG Servos were mounted and the set using the transmitter for proper travel and linearity. I chose to use the SWB servo arms again in this model with Air Wild cable connectors and Nelson rudder cable. There was one issue that was bothering me and had to be addressed before going any further. The supplied ball bearing rudder clevises did not align correctly with the rudder hinge pivot point. As shown in the upper right hand thumbnail, the supplied hardware is off by 9/16" when you use the predrilled hole for the 4mm axis mount. I decided to reserve the supplied ball bearing clevises, 4mm axis mount, and retainers here and use a set of Dubro control horns that match the rudder axis configuration a little better. The engineering dept must have been out to lunch on this one because if you don't have the rudder hinge points configured and aligned correctly with your cabling, larger problems will present themselves at a most inopportune time.
The Dubro control horns are mounted using a 10-32 pivot bolt through the rudder and Locke securely in place at the precise width. On this model I chose a 4" wide spread to achieve maximum deflection during rudder movement, matching the spread of the servo extension horns at the rudder servos. This will be more than ample for any 3D type flying that you may choose to do. Be sure to install clear coating between the control surfaces in the horizontal stab, rudder, and aileron hinge pivot points. This is not included in the mfgr's kit or instructions but I find it to be your most valuable tool in the prevention of any unnecessary flutter.
At this assembly, I've also decided not to use the supplied ball bearing servo extensions or the supplied 440 push rods. Instead, I'll use the SWB 2" extension arms and make my push rods from carbon fiber tubing and metallic 4-40 ends secured by JB Weld. This pushrod won't bend under any circumstances. And if it breaks, you know whom you have to blame.
Time now to mount the horizontal stabilizer and elevator assemblies. Not too very hard to do. Just insert the stab wing tube, slide on the stabs, tap in a 4-40 hole in each stab at the prelocated point and install the 4-40 bolts and you're all finished here.
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