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SZD - 36 Cobra 15 1:3 scale

Posted: 26 Jan 2017, 07:14
by skyhawk92
Hi,

I started a thread on RCGroups, but one of the members convinced me to make one here too, so I'll copy to here what's been done so far.


Some time ago, I became interested in this glider, that is why I decided to show building process of it in 1 : 3 scale. Building style will be something new for many of you, especially design of the wings. Some things I'll try for the first time myself.

You can find some other airplanes I posted, build with this style here(probably you won't understand text , but there are pictures) http://forum.modelarji.com/viewtopic.php?f=29&t=66582

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 26 Jan 2017, 07:15
by skyhawk92
First I decided to make wing supporters, so that epoxy will harden enough before I would need them.
Because it is not worth to make molds for one or two models, I made things differently.
I glued drawings of wing supporters on plywood and covered everything with transparent tape, so that epoxy doesn't stick on it.
I made edges from balsa and also covered them with tape and glued everything together with few drops of instant glue.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 26 Jan 2017, 07:16
by skyhawk92
For reduced weight, I inserted triangular piece of balsa, which will stay inside. I fill supporter alternately with fibers and roving TEX2400 then saturated it with epoxy.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 26 Jan 2017, 07:16
by skyhawk92
I placed a piece of plexiglass on everything and weighted it down. (I used a toolbox with 20 kg of LiPo batteries )

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 26 Jan 2017, 07:29
by skyhawk92
Fuselage ribs are cut and placed on the plan.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 26 Jan 2017, 07:33
by skyhawk92
I started gluing slats of balsa on tail. So far I always made tail separately, but here I will make it together with fuselage, so I will have enough room for servos and elevator links.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 26 Jan 2017, 07:33
by skyhawk92
I glue slats on both sides alternately.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 26 Jan 2017, 07:34
by skyhawk92
A bit of progress...

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 26 Jan 2017, 07:35
by skyhawk92
Few more slats glued...

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 26 Jan 2017, 07:35
by skyhawk92
All slats glued and surface evenly sanded.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 26 Jan 2017, 07:36
by skyhawk92
On the whole surface I applied a mix of epoxy and microballoons, to fill all the small gaps.
Immediately I placed 80g fiberglass and again saturate it with epoxy, then removed the excess of epoxy with small plastic plate.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 26 Jan 2017, 07:37
by skyhawk92
I removed ribs from the first half and reused them on the second half.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 26 Jan 2017, 07:38
by skyhawk92
I sticked together both halves, to see how they fit together, and started making some ribs for wings. :)

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 26 Jan 2017, 07:38
by skyhawk92
Two halves sanded on the inside and 80g fiberglass cut in shapes. One layer over all fuselage and another just on the front part.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 26 Jan 2017, 07:39
by skyhawk92
Same as on the outside, I first fill the gaps with microballoon and then saturate fiberglass with epoxy.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 26 Jan 2017, 07:40
by skyhawk92
Both halves aligned on edge and sticked together.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 26 Jan 2017, 07:41
by skyhawk92
On the outside, stiched together only with a single strip of glass fibers.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 26 Jan 2017, 07:43
by skyhawk92
Main wing support done and shaped.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 26 Jan 2017, 07:45
by skyhawk92
Square tube with holes for screws, which will be inside fuselage, made out of GFK plate.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 26 Jan 2017, 07:46
by skyhawk92
Square tube, covered with few layers of carbon fiber strings and filled with a mix of epoxy and cotton fibers around nuts.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 26 Jan 2017, 07:49
by skyhawk92
That's it so far, both threads are equalized :) I will post on both from now on.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 26 Jan 2017, 17:25
by skyhawk92
Chris Jesshope wrote:Skyhawk,

I have just been catching up with your thread. This technique is very interesting. You might like to know that it is also used in the construction of sailing yacht hulls, although I have typically seen cedar strip rather than balsa used and there and usually two or three layers laid up in different directions but that is used in a 10m structure that is going to hold 1 ton of keel! It results in a very light and strong structure.

keep up the good work!

Chris

Exactly :) that's where I got inspiration.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 30 Jan 2017, 07:18
by skyhawk92
Main thing about the wing construction are bottom shapes of the ribs. This type of construction is fast and accurate and allows to build each control surface separately.

Bottom part shapes of the ribs(jigs or how should I call them... ) are made of 3mm plywood and on top they are covered with tape to prevent anything to stick on them later. To hold them in place, I use pieces of aluminium profiles with M3 size screws. All holes must be on same level(in height).

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 30 Jan 2017, 07:18
by skyhawk92
I build first 5 ribs of the left and right half of the wing and insert the main supporter and set the V angle.

Jigs set in place. Same are used for both halves, no need to use doubles.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 30 Jan 2017, 07:19
by skyhawk92
Putting ribs in place. First 5 of them are made of plywood.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 30 Jan 2017, 07:19
by skyhawk92
Two plywood plates are glued in place where the supporter will be.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 01 Feb 2017, 07:07
by skyhawk92
Rear part of the ribs glued.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 01 Feb 2017, 07:07
by skyhawk92
Second part of the middle wing section and wing supporters glued.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 02 Feb 2017, 07:23
by skyhawk92
Rest of the wing being built.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 02 Feb 2017, 07:24
by skyhawk92
Placing ribs and vertical reinforcement(box).

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 02 Feb 2017, 08:17
by roo Hawkins
Hi just got back from furteventura so l have just looked at this thread. Glad you have joined the forum. The build is looking good a glider I have always liked. I have a old 3 meter veron cobra it may make my rebuild it??? . keep on posting. ROO :D :D

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 02 Feb 2017, 17:39
by Stuart Ward
That's a nice jig. Almost as much in constructing that as in making the wing. :lol:
Stu

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 06 Feb 2017, 07:13
by skyhawk92
:D

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 06 Feb 2017, 07:14
by skyhawk92
Lower channel filled with carbon (roving TX 2400).
That way, wing is very flexible and very strong.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 06 Feb 2017, 07:14
by skyhawk92
Lower part covered and aligned with front edge.
Then I glued plate to the ribs and weighted everything down.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 07 Feb 2017, 07:44
by skyhawk92
Excess balsa cut away at the place of aileron.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 07 Feb 2017, 07:44
by skyhawk92
...

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 07 Feb 2017, 07:44
by skyhawk92
Edge is reinforced with carbon fibers, so it can be sanded to be very thin.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 07 Feb 2017, 09:39
by roo Hawkins
Hi skyhawk how fast is your building it looks like it may be finished next week :D by the way can we have a first name please. ROO

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 07 Feb 2017, 10:59
by skyhawk92
Oh, my name ? Miha ;) Plan is, that it will be finished in mid June...

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 09 Feb 2017, 07:16
by skyhawk92
I compress the edge brtween a 5mm balsa on top and 2,5mm below.
All pieces are covered with tape, so they don't stick together.
Because of the curvature I had to use elastics to hold it in place.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 09 Feb 2017, 07:17
by skyhawk92
I glued 2mm balsa sticks, where the ailerone will be and covered the top with a piece of plate.
When ailerons will be finished, I will fit everything together.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 10 Feb 2017, 08:27
by skyhawk92
When building aileron I first place rectangular profiles. Then I place a lath, which serves as aligner for the ribs.
I also placed bottom part of balsa cover plate.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 10 Feb 2017, 08:27
by skyhawk92
Ribs for aileron glued.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 14 Feb 2017, 05:27
by skyhawk92
Control handles made out of 2mm GFK plate.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 16 Feb 2017, 05:54
by skyhawk92
Control handles glued in and a lath which served as aligner removed.
In this case only, steel rod is used for the aileron because it's so thin at the end, usually I also use a bearing.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 16 Feb 2017, 05:54
by skyhawk92
Circular edge at the front, covered with slats.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 16 Feb 2017, 05:54
by skyhawk92
Same as on wing, rear edge of the aileron thinned and covered, carbon added inside.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 20 Feb 2017, 06:33
by skyhawk92
Sanded a half circle on the wing and covered with 50g glass fibers.
On the aileron, rounded part covered with epoxy + microballons.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 20 Feb 2017, 06:33
by skyhawk92
Aileron sanded and other part of control handles cut.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 23 Feb 2017, 05:47
by skyhawk92
Holes cut out, spacers inserted and aileron set in place.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 23 Feb 2017, 05:48
by skyhawk92
On the wing side, I glued spacers.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 23 Feb 2017, 05:48
by skyhawk92
... and reinforced them with epoxy and cotton fibers.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 23 Feb 2017, 05:49
by skyhawk92
With such an aileron, model response is very good.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 23 Feb 2017, 05:49
by skyhawk92
Both wings put together, so I can see how they fit.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 28 Feb 2017, 06:03
by skyhawk92
Covers for servo and "maintenance" holes...

On a place where the cover will be I made a sketch.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 28 Feb 2017, 06:04
by skyhawk92
I made a cut 1mm wider than sketch, and a bit more on the corners.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 28 Feb 2017, 06:04
by skyhawk92
Frame on which the cover will be fixed is made of samba wood from Africa.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 03 Mar 2017, 06:13
by skyhawk92
On the edge of the cover I drilled some holes, a bit smaler than the screw will be. I temporarily taped it in place and drilled holes in the frame too.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 03 Mar 2017, 06:13
by skyhawk92
I enlarged holes on the cover and screwed it in place to see how it fits. The gap that remains will be filled later, when other covers are made.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 09 Mar 2017, 07:20
by skyhawk92
On the bottom part of the wing I cut holes for the brakes. Opening for servo is a bit larger here for easier access, because I will insert brakes at the very end.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 09 Mar 2017, 07:20
by skyhawk92
My supervisor says, that she wants to help... :)

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 09 Mar 2017, 12:48
by VinceC
Time for a Cat Flap in a glider

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 09 Mar 2017, 19:31
by skyhawk92
:D

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 16 Mar 2017, 06:09
by skyhawk92
Same as on the first one, I made edge on which the cover will be tightened.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 16 Mar 2017, 06:09
by skyhawk92
Around the cover, I taped double sided tape, which is only 0,5 - 1 mm thick, then I tightened cover in place.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 21 Mar 2017, 06:08
by skyhawk92
Gap filled with epoxy-microbaloon.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 21 Mar 2017, 06:09
by skyhawk92
When epoxy hardened, I removed cover and sanded the edge.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 21 Mar 2017, 06:09
by skyhawk92
On the places, where the servos will be, I sticked in plywood.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 27 Mar 2017, 07:07
by skyhawk92
Servo for airbrakes set in place, with L profile made from alluminium.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 27 Mar 2017, 07:08
by skyhawk92
Before the top is covered, struts for wires are glued in.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 27 Mar 2017, 07:08
by skyhawk92
A mix of epoxy + micobaloons applied on the fuselage. Looks ugly, but it will look different when sanded away.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 20 Jul 2017, 08:56
by roo Hawkins
how is this build going

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 28 Aug 2017, 23:06
by skyhawk92
New pictures coming soon. Summer and building of this Ka - 8 in the picture is the reason there was no update for so long.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 05 Oct 2017, 09:32
by skyhawk92
Fuselage roughly sanded.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 05 Oct 2017, 09:34
by skyhawk92
Wings strengthened on the upper side with carbon.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 05 Oct 2017, 09:44
by Martynk
skyhawk92 wrote:
05 Oct 2017, 09:32
Fuselage roughly sanded.
That looks impressive. Did you use a glass cloth under the epoxy/microballon mix?

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 11 Oct 2017, 20:22
by skyhawk92
Yes fuselage is covered in glass cloth, several layers of it. Two parts of fuselage individually first and again when they are put together.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 12 Oct 2017, 10:45
by roo Hawkins
looking good. this is one is next on my building list. may be a bit larger than 1/3 scale ? ROO :D

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 13 Oct 2017, 07:35
by skyhawk92
:)

Whole wing is attached with elastics to keep it aligned correctly.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 24 Oct 2017, 14:02
by skyhawk92
Custom made template, before cutting of the canopy.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 24 Oct 2017, 14:03
by skyhawk92
Canopy, that will be later used as a mold.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 13 Nov 2017, 12:39
by skyhawk92
Template for wing placement.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 13 Nov 2017, 12:39
by skyhawk92
First rib, which will be later glued to the fuselage is taped to the wing.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 04 Dec 2017, 07:57
by skyhawk92
Wings aligned and centered.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 04 Dec 2017, 07:57
by skyhawk92
Just to hold it in place, I put microbaloon+epoxy in some places.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 05 Dec 2017, 06:45
by skyhawk92
Once hardened, I sealed the gap on the lower side, then poured in some thinner mix of microbaloon+epoxy and thicker one at the end.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 07 Dec 2017, 10:44
by skyhawk92
Roughly sanded in shape. Final touches will be done when wings are finished, just before painting.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 07 Dec 2017, 11:30
by chris williams
Looking good...

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 08 Dec 2017, 12:05
by skyhawk92
Corrected radius at the tail a bit.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 18 Dec 2017, 08:53
by skyhawk92
Rudder control surface is made same way as ailerons.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 21 Dec 2017, 10:11
by skyhawk92
Hinges are made same way as on wings except that bearings are also used here.
On front slats are glued.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 21 Dec 2017, 10:18
by skyhawk92
Added carbon fibres at the rear, and covered rest of the rudder.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 22 Dec 2017, 10:54
by skyhawk92
Holes are cut, where the hinges are. Expoxy+microballon is applied on the round part of the rudder and sanded.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 03 Jan 2018, 09:04
by skyhawk92
With elevator, slightly different type of building is used.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 03 Jan 2018, 09:07
by skyhawk92
On the ribs, 3x2mm balsa slats are glued together.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 03 Jan 2018, 09:12
by Martynk
Lovely build

Some very different build methods there as well. I guess that I will have to wait for the next instalment to see how the underside of the elevator is built

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 12 Jan 2018, 13:30
by skyhawk92
There it is :D

Cover finished and sanded just like on fuselage.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 12 Jan 2018, 13:30
by skyhawk92
On top of it, thinner mix of epoxy and microballons is applied and a 25g glass fiber.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 12 Jan 2018, 13:31
by skyhawk92
Same procedure for the other half.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 16 Jan 2018, 09:06
by skyhawk92
Ribs for elevator are made from 3 mm balsa, glued between and 5mm balsa used in the middle.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 16 Jan 2018, 09:06
by skyhawk92
Before I put it together, I checked how it fits.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 23 Jan 2018, 06:48
by skyhawk92
Ribs glued and carbon fibres added on the edges.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 12 Feb 2018, 08:48
by skyhawk92
Fixed everything same way as on wings and weighted everything.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 20 Feb 2018, 07:18
by skyhawk92
Edges sanded.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 20 Feb 2018, 07:18
by skyhawk92
Vertical reinforcement for tail, made out of plywood. Servo for elevator will be inside of this.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 06 Mar 2018, 07:26
by skyhawk92
Edge of the tail sanded to right shape and vertical reinforcement glued in place. A bit of glass fiber and epoxy is also added on the edge.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 06 Mar 2018, 09:04
by Barry_Cole
Looking good. Keep going....

:D :D :D :D

BC

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 06 Mar 2018, 09:11
by Martynk
What is the box for that is attached to the rudder?

Superb craftsmanship by the way.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 07 Mar 2018, 01:59
by Tom Pack
Martynk wrote:
06 Mar 2018, 09:11
What is the box for that is attached to the rudder?

Superb craftsmanship by the way.
Elevator servo.....

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 07 Mar 2018, 07:58
by Martynk
Thanks Tom..

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 12 Mar 2018, 06:29
by skyhawk92
Correct yes, it's for elevator servo.


Roughly filled the gap with microballoon around the main wing support.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 26 Mar 2018, 07:15
by skyhawk92
I attached rudder handle to the bottom part of rudder, so bottom part is easier to make.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 26 Mar 2018, 07:15
by skyhawk92
I filled the remaining space with pieces of styrodur and glued them together with polyurethane glue.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 05 Apr 2018, 06:22
by skyhawk92
Sanded all together.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 05 Apr 2018, 06:23
by skyhawk92
Covered the whole surface with 25g glass fiber and 2 extra layers on styrodur part to make it tougher.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 10 Apr 2018, 08:40
by skyhawk92
Same on the other side.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 10 Apr 2018, 08:41
by skyhawk92
Because rudder is quite massive, edges are a bit thicker.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 25 Apr 2018, 06:29
by skyhawk92
At the end of the stick I put glass fiber and soaked it with epoxy, leveled it up with lathe and made thread so it can be pulled out using screw.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 25 Apr 2018, 06:29
by skyhawk92
Rudder roughly finished.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 07 May 2018, 07:49
by skyhawk92
Elevator mount, made of GFK plate and axes made from brass.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 30 May 2018, 08:13
by skyhawk92
Elevator is used as a negative. I've put a tape on the elevator where the elevator mount is going to be, applied few layers of glass fibers and immediately a layer of microbaloon. Then I've placed the elevator mount on the elevator.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 30 May 2018, 11:59
by terry white
Excellent work again Skyhawk92.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 30 May 2018, 12:47
by Simon WS
Yes, looking really good...

Simon

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 30 May 2018, 12:50
by skyhawk92
Hopefully, it will fly this year :D

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 13 Jun 2018, 09:17
by skyhawk92
After it dried, I drilled holes for the elevator mount, roughly cut it and draw the position. On the places where screws will be I inserted small tubes and on the upper side a piece of plastic tube and glued it.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 26 Jul 2018, 09:07
by skyhawk92
Elevator mount fixed in place and checked, how everything together looks.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 17 Aug 2018, 11:08
by skyhawk92
Mount in place.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 17 Aug 2018, 11:13
by skyhawk92
Covers for gap.

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 17 Aug 2018, 14:32
by VinceC
A few pictures for encouragement

Re: SZD - 36 Cobra 15 1:3 scale

Posted: 24 Oct 2019, 20:26
by skyhawk92
Sorry for not posting for so long, but I simply couldn't find time to post on 2 forums and also had lots of work. In the meantime plane was finished and is flying well.
https://youtu.be/_F1EuBqnhxw