1/3.3 Ventus 3

[ARUP]

I'll second what Asher said. I love my 'lectric blankey!

[ARUP]

Sure... blame the fleece but methinks you have bad dandruff!

[Asher Carmichael]

Very nice, Stephane

[French1]

Ready for the four panel lower surfaces

lets go cutting some spar caps ;

Sans titre by steffruelle, sur Flickr

my technique to store them in order to avoid then to fray

Sans titre by steffruelle, sur Flickr

Servo wire channels ready, the Mc Donalds straws are the best, just the right diameter, using some lightweight spackling , Veneer is cut and assembled using painter tape

Sans titre by steffruelle, sur Flickr

I wet the carbon using a roller to avoid it to fray, a CC for spreading th epoxy and vaccuum

Sans titre by steffruelle, sur Flickr

Good night! warm in the heating blanket, we are waiting 10in of snow for tomorrow

Sans titre by steffruelle, sur Flickr

[French1]

On the menu tonight is the main joiner tubes

So after opening the foam on the left wing early in the morning, I discovered that wearing a fleece might not be the right move as the static made my sweater being a wonderful dust filter!!!

Sans titre by steffruelle, sur Flickr

Once the two slots have been open, I positioned the two main panels on the bench with some styrofoam shims to get the requested dihedral (2.5 degree). And using the sander shaped the two joiner box to fit flush in the slots


Sans titre by steffruelle, sur Flickr

Sans titre by steffruelle, sur Flickr

Sans titre by steffruelle, sur Flickr

Once this done and the vertical spar been cut, a batch of epoxy and microsphere + silica has been prepared to glue everything in place.
Just used some brick to keep it in place and squeeze the excess out...

Sans titre by steffruelle, sur Flickr

then just an warm nap for 8 hours, yes it is quite cold here in Michigan!

Sans titre by steffruelle, sur Flickr

[ARUP]

Let me guess... Jules got into the microspheres thinking it was candy! lol

[French1]

Back at it

First be sure that dihedral is right with the proper shims on the bench,

Sans titre by steffruelle, sur Flickr

Then Gluing the tip joiner box with a tick blend of epoxy and microspheres, a bit of painter tape to avoid bleeding epoxy everywhere

Sans titre by steffruelle, sur Flickr

That is kind of a unique wing, I found it quite pretty

Sans titre by steffruelle, sur Flickr

No bad junction before sanding just after splitting the joiner box using a saw

Sans titre by steffruelle, sur Flickr

Sans titre by steffruelle, sur Flickr

And finally putting in position the main joiner box and the vertical spar composed of a sandwich balsa / 6oz glass / balsa

Sans titre by steffruelle, sur Flickr

Two things missing, first I am out of microsphere so need to order some, and second need to do the other wing in order to verify dihedral on joiner box before gluing

more to come

[French1]

Mike, not exactly. I will cut them after gluing the tube in the box, then I will put the box in position in the wing using the joiner. all this prior bagging lower surfaces

[ARUP]

I like the parchment paper and glass for the joiner tubes! Once you put those boxes with tubes in the foam they stay there until you cut the wings apart after glassing... right?

[French1]

After pausing for a bit here we go again

Joiner box on the menu today

First taking care of the joiner tubes, just laid up on top of selected joiner (18mm carbon rod for main and 1/2in fiberglass for the tips)

usual technique, 1.5 turn of parchment paper and 10 turns of FG 2.3Oz, work well, light and just enough gap.

Sans titre by steffruelle, sur Flickr

Then comes a bit of trigonometry calculus, Tangent is the main function I keep using from middle school ;-) this bird has 4 dihedrals, 3 of them are 2.5 degree (about 10mm elevation for 20cm length)

Joiner box is made using 5mm luan plywood, lighter than aviation ply, 4 layers cut at the right angle together.

For that the great tool to use is a reciprocating table saw, great investment.

The other great tool is the belt/drum sander that help to go FAST when you are sanding

Sans titre by steffruelle, sur Flickr

Now just a bit of positionning , next step is cutting the cores, making a jig just to be sure you have the right angle and pour epoxy...

Sans titre by steffruelle, sur Flickr

Sans titre by steffruelle, sur Flickr

Stéphane

[Mosquito]

I use the same radio on my Arcus with no problem. Your in good hands with the likes of Stehpane, Jeremy, Len and others. They know that radio well. Use your X-Plus channels for gear, tow release etc etc. That way the lower resolution doesn't matter. It will work. I do remember a time when I was setting up my 6 meter LET Ventus with an UP and GO system and I thought that same thing with my DX18. How is this going to work? I then took out a piece of paper and pencil and step by step, thought out each channel configuration and it worked out.

Tim

[French1]

Scot

I would put on 2048 resolution (ch1-10):
Elevator
Rudder
Ailerons(6)
Flaps(2)

And the following on 512 resolution (ch11-20)
Tow release
Retract
Brake
Spoiler
Flaps

If you need help let me know I can craft a program and send it to you

[Stew2]

Jeremy,

I don't think it is a receiver question, I think it is a programming question to know how to best deal with the reduced resolution and lack of fail safe for the X-plus channels and properly understanding the manual statement of "Do not use X-plus channels for any primary flight controls". My gut feel is that it isn't so much the resolution as it is a fail safe question.

[Swiss1]

Just use one of these Scott!

https://www.horizonhobby.com/ar20310t-20-channel-powersafe-integrated-telemetry-receiver-p-spmar20310t

[Stew2]

No Spoilers?!?!? Only 3 servos in each wing?!??!? This thing is going to be like a big free-flight model!! Ok, I'll come clean, I don't really care how many servos you have in YOUR wing, but I do care about how I am going to work MY 2 Flap, 6 aileron wing with spoilers with a DX18/20 radio. Here's the bottom line and by the way, I don't want to hijack your build thread, so if the powers to be, of which you are one, think it best to move this discussion over to a Spektrum programming thread, holler out, I'll dash it over in an instant,

But let's consider an Arcus for example, 2 flaps, 6 ailerons, 2 spoilers, rudder, elevator, tow release, retract and brake. That is 15 servos. With the desire/need to have the entire trailing edge of the wing capable of flaperon, camber, reflex and differential control, you end up with 11 primary flight controls(2 flap, 6 aileron, spoiler, rudder, elevator) on 12 servos. Here in lies the head scratcher, DX18/20 radios use the X-plus system to extend past 12 channels and do so by lowering the resolution of the extended channels and having to remove the fail-safe feature on the extended channels. Employing X-plus, knocks down the available channels for primary flight controls to 10 by using channels 11 and 12 for the X-plus extension. If my understanding of X-plus is incorrect, please help me learn the right of my wrongs and stop any false info from spreading from here.... So, what I am wondering is, what would be your suggestion and anyone else who hasn't fallen asleep reading this far as well, to layout the control configuration on said airplane with subject radio?

Thanks for the intelligence,

Scot