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AUDAX

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Re: AUDAX

Message non lupar Bloodhound » 02 Mai 2015, 14:23

Thank you JClaude!

Adding the balsa block for the control horn:
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Wing structure and the second skin panel attached using polyurethane adhesive and pressed together in the jig:
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Sanding off the excess sheeting at the leading edge:
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Bending the 10mm balsa leading edges with hot water:
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Attaching the leading edges to the wing:
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Rough shaping of the leading edges:
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Marking the leading edge centerline:
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Sanding the leading edges:
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Bloodhound
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Re: AUDAX

Message non lupar Bloodhound » 08 Mai 2015, 16:43

Sanding the excess sheeting at the trailing edge:
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Attaching and sanding the trailing edge balsa strips:
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Preparing and attaching the wing tips:
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Rough shaping and sanding the wingtips:
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Re: AUDAX

Message non lupar Bloodhound » 08 Mai 2015, 16:46

Progress on the wing so far:
Image Image Image
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Re: AUDAX

Message non lupar Bloodhound » 15 Mai 2015, 20:12

Marking and cutting the ailerons:
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Adding and sanding the balsa blocks at the root and tip of the aileron:
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Preparing the hinge lines:
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Attaching the aileron hinge line:
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Hinge line attached to the wing and sanded:
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Sanding the excess balsa sheeting at the wing root:
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Adding the wing root balsa block:
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Re: AUDAX

Message non lupar Bloodhound » 28 Mai 2015, 19:53

The stab tube sleeve was attached to the fuselage with epoxy and microbaloons. The stab key is made of 4mm diameter aluminium and passes through a carbon tube glued inside the fuselage so it can be replaced if necessary.
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The wing tube sleeve attached to the fuselage:
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Wing and stab root blocks sanded to fit the fuselage:
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A few images of the finished wing:
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Re: AUDAX

Message non lupar Bloodhound » 05 Juin 2015, 20:26

Installing the wing incidence adjusters:
Image Image Image Image Image Image

Marking and drilling the adjuster holes into the wing root rib:
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Wings fitted:
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Cutting the aileron servo slots:
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Re: AUDAX

Message non lupar claudecuinet » 06 Juin 2015, 13:49

Hello Alex

Wonderfull wings !
Any informations and experiences about servo Hyperion DS 20 FMD ?
This servo is not expensive, price is about 35 E in France
Claude
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Avion: HARMONIE turquoise
Moteur: YS 175 CDI
Hélice: APC 20x10,5
Carburant: 9 % huile 20 % nitro
Emetteur: FUTABA 9ZAP
Récepteur: R 6008 HS
Servos: Futaba
Catégorie: Nationale 2B
Fréquence: 2,4 Gh

Re: AUDAX

Message non lupar Bloodhound » 06 Juin 2015, 14:19

Thank you Claude!

The metal gear Hyperions are very good servos, just stay away from the carbonite gears.
The Hyperion DS20 FMD is ok, but i prefer to use the Hyperion DS20x-SMD (coreless servo) for ailerons now because it's a little faster. I bought them from http://www.makrisrc.com in France.
For elevators i use the DS16 FMD, but for rudder i chose the Futaba BLS 452. I also tried the Hyperion DS20 UMD for rudder but it seemed to lack
resolution. All the other Hyperions don't seem to have any problem with resolution.
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Re: AUDAX

Message non lupar Bloodhound » 12 Juin 2015, 20:51

Adding wood dowels at the ends of the stab tube:
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Marking the location of the stab retaining screw:
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Drilling and tapping the stab tube holes:
Image Image Image Image Image Image Image
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Re: AUDAX

Message non lupar Bloodhound » 12 Juin 2015, 20:59

After some thinking i decided to give up on the idea of having the elevator servos hidden inside the stabs. The thickness of the nut, servo arm, spacer, ball link and the screw head are all adding up, so the slot required for the free movement of the linkage would be very wide. For me this defeats the purpose of having the servo hidden inside the stabs.
The other alternative would be to use a very long servo arm and small servo travels so the ball link doesn't interfere with the stab underside, but i didn't want to sacrifice servo resolution.

I decided to install the servos on the stab undersurface so i had to improvise something for the servo mounts. Too bad i didn't think this through from the start because it would save a lot of weight, probably around 15g for each stab.

Image Image Image Image Image Image Image
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Re: AUDAX

Message non lupar Bloodhound » 20 Juin 2015, 08:11

Marking the location and cutting the slot for the elevator control horn:
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Hinging the elevators:
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Adding some light filler on the stab surfaces:
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Filler sanded off, final stab weights before covering:
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Hinging the ailerons:
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Adding light filler to the wing surfaces:
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Filler sanded off, final wing weights before covering:
Image Image
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Re: AUDAX

Message non lupar Bloodhound » 21 Juin 2015, 08:46

Before film covering, i assembled the model and took a few pictures. I'm not sure the pictures can reveal the size of this thing, so here are a few dimensions of the model. The wing root chord is 580mm which i believe is larger than anything out there at the moment. The fuselage is quite tall at approx. 380mm in the the canopy area and the fin is 455 mm tall. In general it seems huge and i barely had enough space for assembly.

Image Image
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Re: AUDAX

Message non lupar Bloodhound » 26 Juin 2015, 17:06

Before starting on the film covering, i made a few changes to the paintscheme:

Image Image Image
Modifié en dernier par Bloodhound le 26 Juin 2015, 17:16, modifié 1 fois.
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Re: AUDAX

Message non lupar Bloodhound » 26 Juin 2015, 17:16

Stab film covering:

Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image Image
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Re: AUDAX

Message non lupar claudecuinet » 26 Juin 2015, 17:20

Hello Alex

I wish that your plane will fly as well as it is beautiful.
I found the changes
Before
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After
Image
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Messages: 1507
Enregistré le: 06 Sep 2004, 15:05
Avion: HARMONIE turquoise
Moteur: YS 175 CDI
Hélice: APC 20x10,5
Carburant: 9 % huile 20 % nitro
Emetteur: FUTABA 9ZAP
Récepteur: R 6008 HS
Servos: Futaba
Catégorie: Nationale 2B
Fréquence: 2,4 Gh

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