Aeroic Aresti 108 build

[Motowncali]

Let me start with... This Thing is a BEAST!
The plan is to put the servos in the tail. I also would like 2” of rudder each way for beautiful hammer heads...
So, first thing that needs to be done is open up the gap slightly for the rudder. The swiper is smooth, but because of the shape and thickness, the rudder will have less effect when deflected opposite the hinge line, 1/2” of the rudder is now inside the post... carefully taped my ruler in place and removed an additional 1/8”, got a 1/2” more easy throw instead of fighting to move it... Yes, that is a 12” ruler on the rudder hinge line! Didn’t I say this thing is huge?!?
The next thing I noticed was the because of the taper of the vertical fin, the rudder was also offsetting vertically and rubbing at the top. A little careful sanding and I was able to get even freer movement. And you cant hardly tell the at the top gap is 2mm wide instead of 1mm.

 

[Motowncali]

Servo Mount is 1/8”, a little trimming hear, a bit of trimming there, carefully cut some blocks, tack them in place and two and half hours later, the tail servos slide in on a beautiful tray. As done with the previous Aresti build and the Gremlin build, the elevator servo is forward at a slight angle for the top hinged stab. With as tight as this is, I am going to make a template using the anti rotation pins as a guide and will use four 2-56 flat head screws threw the otherside of the fuse to hold the servo tray in place. The screws will thread right into the four servo mounting blocks. There is already a layer of carbon on that side of the fuse, should pull up nice and tight and be completely smooth.
Rudder control rod will cross the fuse at a slight angle much like your aileron linkages.

 

[Konrad]

I see where you and I think much the same. In my sport ships I love all the rudder I can get. I also like the fly by wire set up (servos in the rear). I also like your ganged servo tray in the back.

Well done!

All the ebst,
Konrad

 

[Diceman]

Slick idea for sure. Do you have a pic what it will look like on the side that you bolt down the tray with the screws installed? Just curious.

 

[Motowncali]

Slick idea for sure. Do you have a pic what it will look like on the side that you bolt down the tray with the screws installed? Just curious.

Will post pictures when done.

 

[Wayne]

Like the carbon pins to help keep those blocks in place. Good idea, I remember popped a hard wood block off once on a so-so landing. That pin would have avoided that issue.

 

[Motowncali]

It’s been a little while since I worked on this, so back out it came. Happy to say linkages to the elevator and rudder are done, servo extensions made.
Used a piece of 1/32 ply to make a hole template to align the servos and drill the holes in the other side of the fuse. Flat head 2-56 screws are on the way so that I can countersink and mount one last time. Will put up a pic when done. Linkages are tight and throws look good. Wouldn’t mind having a little more throw in the rudder, but the fuse is only so wide.

 

[Diceman]

Looks great Mo!
Maybe if you use a shorter servo arm? In the D60 build you have to drill another hole so close to the servo gear it is crazy. Either that or you can use a MKS servo and use one of Spencer's short servo arms. Just a thought for the future? Plus having that ply in there I sure takes up some room as well.
Cant wait to see her fly!

 

[Motowncali]

Looks great Mo!
Maybe if you use a shorter servo arm? In the D60 build you have to drill another hole so close to the servo gear it is crazy. Either that or you can use a MKS servo and use one of Spencer's short servo arms. Just a thought for the future? Plus having that ply in there I sure takes up some room as well.
Cant wait to see her fly!

Had to drill the dimples in the factory arms to get the resolution where I wanted it on many builds. But on this, want to go the other way, longer arm. The tail is actually quite wide at 20mm

 

[Konrad]

Why the slant of the elevator servo? I notice that it looks to be not tangent to the arch. I've seen this with more than one installation.

All the best,
Konrad

 

[Motowncali]

Why the slant of the elevator servo? I notice that it looks to be not tangent to the arch. I've seen this with more than one installation.
All the best,
Konrad

I may be the only one doing this, not sure. But with the top skin being the hinge and the wire that connects the elevator halves being below the hinge line, moving the servo forward and angling the rod back, gives better down resolution.
You can also see it in the shape of the arc cut out in the fin. The rod moves forward in the down travel and almost straight up in up travel.

 

[Konrad]

Thank you!
So you are tangent. I was looking at the chord line. Not as you correctly mentioned the hinge point. The hinge is what defines the arch.

Again thank you.

All the best,
Konrad

 

[Wayne]

So you are tangent.

Nope, he is Mo.

You might be happy to know what Hammond is working on a molded tray for the tail on one of his new models. Should be interesting and much easier for future installs.

 

[Motowncali]

Aresti 108. It has been a fun process getting both servos in the tail and totally worth it! Came out very clean and the surface centering is great! Flat head screws showed up. Damn that’s clean if I don’t say so!

 

[Motowncali]

Just getting going on the wings, drilled and mounted the KST X10’s to the frames and was very surprised that the screws came out the other side. If these had been in the wing, they would have come through the skin...

 

[Konrad]

FYI; there may be are other traps awaiting.

Servo Tray Mounting

Last night I was helping a forum members program his X9D+ for a 6 servo glider. I noticed that when the glider was assembled that there was a lot of distortion on the wing skin and movement of the wing servo. This was traced to the servo mounting trays. With today's real narrow servos the...

forum.alofthobbies.com

 

[jvaliensi]

I always check the screw length for the servo frames. Often times I have to add a nylon washer.

 

[Motowncali]

Installing the frames was too easy on this plane. Linkages were straight and the MPJet clevises work flawlessly.

Since there are no servos in the nose of the plane, I added a 1/32 ply top to the servo tray. This made mounting the receiver and battery much cleaner.

 

[Motowncali]

Some quick photos of the servos installed. Very straight forward. Didn’t even need to bend the pushrods, they are straight shots to the horns. Aileron horns slightly offset trying to get more up than down mechanically, still requires a little differential in the tx to get it where I want to start.

Took 20 ounces in the nose to achieve a 140mm CG. Will add another 1.5 ounces to maiden at 130mm and see where it goes from there.