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Old Oct 17, 2012, 08:29 PM
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Here are some photos that show the construction of the canopy.

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Old Oct 17, 2012, 08:35 PM
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A few more shots of the canopy and a liftoff shot of my Ĺ scale Hyperion from the good folks in Australia.

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Old Oct 24, 2012, 05:48 PM
iPhly R/C with iPhone
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So at the speeds you fly, I wonder if you have issues with control surface flutter.

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Old Oct 24, 2012, 08:19 PM
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Quote:
I wonder if you have issues with control surface flutter.
Yes, flutter is an issue.
I have flown several large RGs to some reasonably fast velocities.
Here are a few things you can do to combat flutter.
1. Little or no hinge gap.
2. A rock solid control system with absolutely NO PLAY.
3. Properly shaped flight controls. Rounded trailing edges are very bad.
4 Try to minimize flight control size.
5 Balance the flight controls if necessary.

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Old Oct 24, 2012, 09:14 PM
iPhly R/C with iPhone
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These are beautiful models, thank you for posing them!

I wonder if you can elaborate on how you address these issues--i.e. do you cover the hinge lines, what do you do to minimize control linkage slop, etc.

I wonder also if full-flying rudders and elevators help.

Ari.
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Old Oct 25, 2012, 12:53 AM
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Quote:
I wonder if you can elaborate
Hi Ari,

Hereís a photo of the linkage on the X-30.
In this case we used a fiberglass hinge seal (both top and bottom) and I usually use ball links for a smooth and slop free installation. The Robart Hinge Point work well, but you have to embed them into the trailing edge of then wing or tail and the leading edge of the control surface. Iíll get a shot of my ME-163 and show you what IĎm talking about.
I then seal any remaining gap with covering. . I do use full flying controls on some of the jets I fly, you need a good strong servo, slop free bearings and you need to balance the surface appropriately.

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Old Oct 25, 2012, 01:05 AM
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Hereís a shot of the 163.
Even looking closely you canít see daylight in the rudder or elevon hinges.
If you zoom in you can see the Hinge Point installation.

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Old Oct 25, 2012, 01:47 AM
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Quote:
Originally Posted by X30PILOT View Post
Hi Ari,

Hereís a photo of the linkage on the X-30.
In this case we used a fiberglass hinge seal (both top and bottom) and I usually use ball links for a smooth and slop free installation. The Robart Hinge Point work well, but you have to embed them into the trailing edge of then wing or tail and the leading edge of the control surface. Iíll get a shot of my ME-163 and show you what IĎm talking about.
I then seal any remaining gap with covering. . I do use full flying controls on some of the jets I fly, you need a good strong servo, slop free bearings and you need to balance the surface appropriately.

X30
I'm not familiar with fiberglass hinge seal--what is it?

Also, any servo and bearing recommendations for full-flying surfaces?

I wonder about mounting a full-flying elevator directly on one of ServoCity's servo gearboxes.

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Old Oct 25, 2012, 10:46 PM
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Quote:
I'm not familiar with fiberglass hinge seal--what is it?
I just use some thin G-10 strip, size and thickness depend on the model. I have a racing plane that uses styrene sheet the same way.

Quote:
Also, any servo and bearing recommendations for full-flying
surfaces?
As far as servos go, something digital and strong. Most of the hobby shops these days carry a nice assortment of bearings for helis and cars. Tail rotor bearings may be just the thing to use here.

Quote:
I wonder about mounting a full-flying elevator directly on one of ServoCity's servo gearboxes.
I have looked at doing this and as long as the surface is firmly attached this would work well.

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Old Oct 26, 2012, 01:29 AM
iPhly R/C with iPhone
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Originally Posted by X30PILOT View Post
I have looked at doing this and as long as the surface is firmly attached this would work well.
I'd just extend the shaft and make it the elevator's spar.

Ari.
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Old Oct 29, 2012, 09:51 PM
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Here are a couple of pictures of the completed canopy sub-assembly.

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Old Oct 30, 2012, 03:58 PM
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Are you going to belly land it, or do skids and a nose wheel?
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Old Oct 30, 2012, 05:58 PM
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Quote:
Are you going to belly land it, or do skids and a nose wheel?
Hereís a photo of just a few parts of the pneumatic retract system on the X-2.

Like the full sized bird, once I roll onto final approach a nose gear cover will drop away and Iíll deploy the nose wheel and landing skids.

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Old Nov 12, 2012, 07:59 PM
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I now have 3 flights on the small X-2 and it flies very well.
Now Iím going to experiment with using the ailerons for pitch as well as roll.
Iím also going to install an Eagletree Guardian and test the auto stability feature of this device and if I like it Iíll install it in the big X2 as well.

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Old Nov 28, 2012, 08:39 PM
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I flew the little X-2 two more times this past weekend and experimented with mixing some elevator control in with the ailerons and this worked well.
Iím hoping this will help me expand the C/G envelope. Now Iíll install the Eagletree Guardian and see how this works in the little X-2. If it survives these tests then I remove the electric power system and fly it on an ďEĒ

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