forum.ww1aircraftmodels.com

WW1 Aircraft Modeling => Under Construction => Topic started by: Mike Norris (UK) on July 01, 2022, 07:38:15 AM

Title: 1:32nd scale Junkers J.1
Post by: Mike Norris (UK) on July 01, 2022, 07:38:15 AM
Hi all,
My build of the RAF BE2c is complete, apart from its display case.
So I thought I'd take a break from resin models and rigging.
Therefore the next model will be the Junkers J.1 armoured ground attack aircraft.
This particular aircraft is Serial No: 596/18 at Dessau airfield, Germany, in September 1918.

Mike

(https://www.thatoneplease.co/buildlogs/JunkersJ1/header.jpg)
Title: Re: 1:32nd scale Junkers J.1
Post by: rhwinter on July 01, 2022, 04:04:17 PM
Looking forward to this one, Mike! Are there decals for this individual plane available or will you make them yourself?
Unfortunately I did not know, I'll once like the J.1, when Wingnut Wings were still alive. So I missed this kit.
Happy modeling!
Richard
Title: Re: 1:32nd scale Junkers J.1
Post by: Mike Norris (UK) on July 01, 2022, 07:26:36 PM
Hi Richard,
Yes the kit has a decal sheet covering five different aircraft.
I could use these decals for this particular, apart from the serial number, which I'd have to create.
As the aircraft surface is corrugated duraluminium, laying decals can be problematic.
That said, I managed it for the Junkers D.I OK.

Mike
Title: Re: 1:32nd scale Junkers J.1
Post by: DaddyO on July 01, 2022, 10:05:22 PM
Looking forward to this one
(I've got the 72nd Eduard one on the shelf calling me with it's siren song . . . . 'No rigging to be found. . . . ')  ;D

Paul
Title: Re: 1:32nd scale Junkers J.1
Post by: Mike Norris (UK) on July 02, 2022, 07:48:06 AM
Hi all,
Interesting to note that even 'Wingnut Wings' can get it wrong.
The known gap at the upper wing aileron inboard ends.
Also the instruction manual on page 11 shows assembly of the upper wing outer sections.
The kit supplies wing stiffeners (Parts I1 and I6), which are intended to be fitted into the upper wings outer halves before the halves are joined.
However, the instructions on page 11 do not show or mention these stiffeners.


Mike

EDIT - I was wrong - the stiffeners are for the upper wing centre section (page 8 in the instructions) - not for the outer wing sections.
Title: Re: 1:32nd scale Junkers J.1
Post by: rhwinter on July 02, 2022, 05:23:53 PM
Mike, say, did you find any hint to how and where exactly the downward fireing MG some of the J.1 featured were mounted?
Title: Re: 1:32nd scale Junkers J.1
Post by: Mike Norris (UK) on July 03, 2022, 07:36:46 AM
Hi all,
The kit supplied upper wing outer sections have an extension at the wing trailing edges.
This is to represent the cover strip for the leading edges of the ailerons.
However, due to the limitations of moulding, these corrugated cover strips are moulded as straight extensions.
In reality, these cover strips were normally unevenly distorted along their entire length, from slight to heavy distortions.
As they were made from corrugated Duraluminium sheet, my assumption is they were probably distorted by being trodden on by maintenance personnel.

To create these distortions, I used the heat from an electrical soldering iron.
The wing was held of the tip of the soldering iron until the styrene showed signs of softening.
I then eased the styrene into a distortion using the ball end of a paper embossing tool.
Then I just moved along the wing repeating the process.

Now onto the infamous gap between the aileron inboard ends and the upper wing centre section,

Mike

(https://www.thatoneplease.co/buildlogs/JunkersJ1/aileronstrip.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/wrinkles1.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/wrinkles.jpg)
Title: Re: 1:32nd scale Junkers J.1
Post by: Mike Norris (UK) on July 03, 2022, 08:16:20 AM
Mike, say, did you find any hint to how and where exactly the downward fireing MG some of the J.1 featured were mounted?

The normal armament for Junkers J.1 was a single Parabellum LMG14, fitted to the rotating ring mount in the observers cockpit.
No forward firing weapons were ever fitted.
However, in January 1918, work was carried out on a Junkers J.1 to install two machine guns in the floor of the observers cockpit.
Some sources state the aircraft was Junkers J.1 serial number 816/17, however, photos shown 826/17 with the twin gun fit.
This was started by the Austro-Hungarian Air Service.
The weapons were angled forwards at 45 degrees, the idea being the pilot (who operated the weapons) could watch for the impact of the fired rounds on the ground and be able to position the aircraft to fire on a target.
Also another Junkers J.1 was fitted with a flexible mounted Becker cannon, the work being virtually completed by January 1918.
Trials for both types of weapons installation was scheduled for February 1918.
However, neither was introduced operationally,

Mike 

(https://www.thatoneplease.co/buildlogs/JunkersJ1/2gun1.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/2gun2.jpg)
Title: Re: 1:32nd scale Junkers J.1
Post by: rhwinter on July 03, 2022, 04:10:37 PM
Thanks, Mike! I did not know, the downward fireing MG were not used operationally!
Title: Re: 1:32nd scale Junkers J.1
Post by: Mike Norris (UK) on July 04, 2022, 06:37:16 AM
Hi all,
The upper wing ailerons are supposed to be close to the outboard trailing edges of the centre section.
Once assembled, there is a 2.5 mm gap where the centre section moulding did not include an extension to meet the ends of the ailerons.
Making inserts to fill the gaps is tricky as the wing surfaces are corrugated.
However, the kit sprues have two parts (24 and 25) which are not used and these are corrugated on on side.
I cut two strips with two corrugations to fit the gaps.
These were cemented into the gap on the top surface of the upper wing.
There is not enough of parts 24 and 25 left to use on the underside of the upper wing.
Therefore I cut inserts from 0.5 mm styrene sheet to fill the gaps then added two 0.5 mm wide styrene rods to represent the corrugations.

Mike

ORIGINAL GAP
(https://www.thatoneplease.co/buildlogs/JunkersJ1/gap.jpg)
UPPER SURFACE INFILL
(https://www.thatoneplease.co/buildlogs/JunkersJ1/gap1.jpg)
UNDERSIDE INFILL
(https://www.thatoneplease.co/buildlogs/JunkersJ1/gap2.jpg)
Title: Re: 1:32nd scale Junkers J.1
Post by: KiwiZac on July 04, 2022, 10:06:42 AM
Excellent work Mike - just like a bought one!
Title: Re: 1:32nd scale Junkers J.1
Post by: RAGIII on July 04, 2022, 10:59:18 PM
Nice fix Mike!
RAGIII
Title: Re: 1:32nd scale Junkers J.1
Post by: Mike Norris (UK) on July 07, 2022, 01:02:34 AM
Hi all,
Although the kit supplied engine (Benz Bz.IV) is of good quality, there are details of the engine not included.
1. Cylinders coolant pipe (left side of engine only).
2. Ignition lead support tube (both sides of the engine).
3. Fuel primers (left side of engine cylinders).
4. Carburettor pre-heating gallery.
5. Carburettor pre-heating pipe.
6. Carburettor pre-heating pipe.
7. Carburettor pre-heating supply pipe.
8. Ignition leads (both sides of the engine).
9. Carburettor control rod.
10. Fuel supply connection (possibly).
11. Bleed pipe (possibly).
12. Valve gear push rods (6 each side of the engine).
13. Oil filter and pipe.

(https://www.thatoneplease.co/buildlogs/JunkersJ1/eng11.jpg)

I've made a start by cutting away the pre-moulded and flat coolant pipe across the bottom of the cylinders.
This was replaced by 0.8 mm diameter styrene rod inserts.
Also the ignition leads support tubes were made from flattened 0.6 mm diameter brass tube.

(https://www.thatoneplease.co/buildlogs/JunkersJ1/engmod2.jpg)

Next up are the cylinder fuel primers,

Mike
Title: Re: 1:32nd scale Junkers J.1
Post by: KiwiZac on July 07, 2022, 07:51:36 AM
Fascinating stuff Mike, I'm excited to see the engine - it sounds like a project in itself!
Title: Re: 1:32nd scale Junkers J.1
Post by: Rookie on July 07, 2022, 08:37:33 AM
Immaculate research and detailing as ever Mike!

Willem
Title: Re: 1:32nd scale Junkers J.1
Post by: Mike Norris (UK) on July 12, 2022, 01:29:42 AM
Hi all,
The engine is as complete as I can get it.
I've added some details:

Ignition leads support tubes
Ignition leads
Valve gear push rods
Cylinder fuel primers
Float chamber fuel supply
Magneto spark advance rod
Throttle control rod
Carburettor interconnection rod and levers
Rear engine pipes and tachometer drive.
Coolant pipe through cylinder bases
Coolant supply pipe from water pump.

The engine controls will be attached to the fuselage/cockpit later in the build.
Now onto the fuselage,

Mike

(https://www.thatoneplease.co/buildlogs/JunkersJ1/engdone1.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/engdone2.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/engdone3.jpg)
Title: Re: 1:32nd scale Junkers J.1
Post by: andonio64 on July 12, 2022, 01:45:35 AM
Come on Mike, do you still keep that old engine at home to take photographs ?

:-O
Title: Re: 1:32nd scale Junkers J.1
Post by: Rookie on July 12, 2022, 03:17:34 AM

...I've added some details...


Your modesty is admirable Mike, but I think this is an award winning model in itself!  :o

Willem
Title: Re: 1:32nd scale Junkers J.1
Post by: Borsos on July 12, 2022, 03:31:41 AM
Very nice engine!
Andreas
Title: Re: 1:32nd scale Junkers J.1
Post by: Brad Cancian on July 12, 2022, 07:06:52 AM
Lovely engine there Mike, top notch.

Cheers,

BC
Title: Re: 1:32nd scale Junkers J.1
Post by: RAGIII on July 12, 2022, 07:34:25 AM
Lovely engine there Mike, top notch.

Cheers,

BC

YEP!
RAGIII
Title: Re: 1:32nd scale Junkers J.1
Post by: pepperman42 on July 12, 2022, 08:58:45 AM
Missed the start of this. Glad I caught up. The motor details and your explanations are extremely useful. Great stuff!!

Steve
Title: Re: 1:32nd scale Junkers J.1
Post by: KiwiZac on July 12, 2022, 09:03:17 AM
Words fail me. Truly inspirational work, Mike!
Title: Re: 1:32nd scale Junkers J.1
Post by: Alexis on July 12, 2022, 03:03:49 PM
Love it Mike !


Alexis
Title: Re: 1:32nd scale Junkers J.1
Post by: Jorgo on July 12, 2022, 03:49:24 PM
Excellent work !

Jörg
Title: Re: 1:32nd scale Junkers J.1
Post by: PrzemoL on July 12, 2022, 09:22:44 PM
Spectacular upgrade of that Benz! And a great reference for possible future builds. Thanks, Mike.
Title: Re: 1:32nd scale Junkers J.1
Post by: Stuart Malone on July 13, 2022, 01:56:33 AM
Mike,

Beautiful Benz.  I am going to do a second 1/72 J.I.  I'm definitely going to install a full engine and try to trick it out like yours as much as my abilities will allow.  Thanks for sharing the detail shots.

Stuart
Title: Re: 1:32nd scale Junkers J.1
Post by: Mike Norris (UK) on July 20, 2022, 03:02:02 AM
Hi all,
The basic fuselage internals are done.
Although no rigging is necessary I have added the rudder and elevator control lines.
I've also added extra fuel pipes to the main fuel tank and the 'Telefunken' wireless aerial wire, wrapped around the spool on the set in the gunners cockpit.
Finally the two filler caps on the right side forward from the pilots cockpit - I assume these were for fuel and coolant.
I've not fitted the two aileron control rods from the cockpit as they can be easily broken during subsequent handling.
I've tested and they can be fitted later but before the engine is finally fitted.
The engine shot below is test fitted only.

Mike

(https://www.thatoneplease.co/buildlogs/JunkersJ1/int1.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/int2.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/int4.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/int5.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/int6.jpg)
Title: Re: 1:32nd scale Junkers J.1
Post by: pepperman42 on July 20, 2022, 09:38:35 AM
Wow!! Big jump forward. That looks awesome.

Steve
Title: Re: 1:32nd scale Junkers J.1
Post by: KiwiZac on July 21, 2022, 08:40:31 AM
Gorgeous paint work Mike!
Title: Re: 1:32nd scale Junkers J.1
Post by: rhwinter on July 21, 2022, 06:24:45 PM
LIKE!
Title: Re: 1:32nd scale Junkers J.1
Post by: Mike Norris (UK) on July 22, 2022, 04:12:43 AM
Hi all,
The hinged engine access doors had more detail than provided on the basic doors that are supplied in the kit.
Also Wingnut Wings chose to have four bracing ribs moulded onto the inside of both panels.
However, The only photographs of these panels, either at the time or museum aircraft, don't show four bracing ribs.

They seem to have been located on the doors as either:
        Two ribs - front and forward
   Three ribs - forward, centre and rear
   Two ribs - forward and centre.

Also there are details that needed to be added:
       Lightening holes in the bracing ribs
   Retaining cable or rod
   Additional bracing tubes
    Ports from the external cooling air louvres (right door only)
   Access panels to the engine (left door).

I opted for the three ribs (forward, centre and rear) as shown below.
The ribs were cut from 0.5 mm thick styrene sheet and drilled using 0.6, 0.8, 1.0 and 1.2 mm diameter drills.
The bracing tubes are flattened 0.7 mm diameter Brass tube.
Cooling ports and access panels were cut from 0.2 mm thick styrene sheet.

(https://www.thatoneplease.co/buildlogs/JunkersJ1/engdoor7.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/engdoor9.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/engdoor10.jpg)

Now onto the locking plates for the two access panels.

(https://www.thatoneplease.co/buildlogs/JunkersJ1/engdoor8.jpg)

Mike
Title: Re: 1:32nd scale Junkers J.1
Post by: Mike Norris (UK) on July 22, 2022, 06:55:52 AM
Hi all,
The locking plates for the two access panels.

(https://www.thatoneplease.co/buildlogs/JunkersJ1/engdoor12.jpg)

Mike
Title: Re: 1:32nd scale Junkers J.1
Post by: KiwiZac on July 22, 2022, 08:12:41 AM
Those ribs are a great improvement, nice work Mike.
Title: Re: 1:32nd scale Junkers J.1
Post by: FAf on July 22, 2022, 05:14:56 PM
Very nice extra detailing!
/F
Title: Re: 1:32nd scale Junkers J.1
Post by: pepperman42 on July 24, 2022, 11:43:43 PM
Very nice additions!

Steve
Title: Re: 1:32nd scale Junkers J.1
Post by: RAGIII on July 25, 2022, 07:45:19 AM
As usual your additions are awesome Mike!
RAGIII
Title: Re: 1:32nd scale Junkers J.1
Post by: Mike Norris (UK) on July 26, 2022, 06:24:19 PM
Hi all,
All of the parts have now been painted.
I've replaced the Parabellum machine gun with a 'GasPatch' Parabellum LMG14, which only meant a slight modification to the lit supplied mounting.
Now onto applying the decals and then weathering, before construction of the model,

Mike

(https://www.thatoneplease.co/buildlogs/JunkersJ1/paint1.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/paint2.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/gun3.jpg)
Title: Re: 1:32nd scale Junkers J.1
Post by: pepperman42 on July 26, 2022, 09:07:57 PM
Very nice progress

Steve
Title: Re: 1:32nd scale Junkers J.1
Post by: rhwinter on July 26, 2022, 10:33:17 PM
Looking goood! I like the hue of the green colour!
Title: Re: 1:32nd scale Junkers J.1
Post by: Mike Norris (UK) on July 26, 2022, 11:34:34 PM
Looking goood! I like the hue of the green colour!
Just plain 'Tamiya' Dark Green 2 (RAF) - XF81,

Mike
Title: Re: 1:32nd scale Junkers J.1
Post by: Mike Norris (UK) on July 28, 2022, 03:32:32 AM
Hi all,
A few updates.
The 'Aviattic' 5 colour faded lozenge decal applied.
Also the kit supplied decals.
I had to print the serial number for this particular aircraft.
I've fitted the tail plane, fin and rudder.
Also the two flare racks, engine Tachometer and pilots mirror.

Now it's weathering before assembly,

Mike

(https://www.thatoneplease.co/buildlogs/JunkersJ1/Dec1.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/Dec2.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/Dec3.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/Dec4.jpg)
Title: Re: 1:32nd scale Junkers J.1
Post by: Mike Norris (UK) on July 28, 2022, 05:29:12 AM
Hi all,
I've represented the front and rear grills of the radiator in the upper wing.
Cut strips of the 'RB Productions' Radiator Mesh (RB-T027), sadly no longer available.

Mike

(https://www.thatoneplease.co/buildlogs/JunkersJ1/grill1.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/grill2.jpg)
Title: Re: 1:32nd scale Junkers J.1
Post by: KiwiZac on July 28, 2022, 07:13:31 AM
The addition of the fabric really makes this pop. Nice work Mike.
Title: Re: 1:32nd scale Junkers J.1
Post by: rhwinter on July 28, 2022, 05:53:04 PM
Beautiful - what more can I say?!
Title: Re: 1:32nd scale Junkers J.1
Post by: pepperman42 on July 28, 2022, 11:32:55 PM
Kit decals performed well on that corrugated wing and the lozenge looks great.

Steve
Title: Re: 1:32nd scale Junkers J.1
Post by: Mike Norris (UK) on July 29, 2022, 02:10:00 AM
Kit decals performed well on that corrugated wing and the lozenge looks great.

Steve

Not really Steve.
As expected the decals cracked over the corrugated surface, despite taking care.
Several coats of setting solution were required, including slicing the inevitable air blisters then more solution.
Any visible hairline cracks remaining were painted to match,

Mike
Title: Re: 1:32nd scale Junkers J.1
Post by: Mike Norris (UK) on July 29, 2022, 07:27:31 AM
Hi all,
One dirty ground attack Junkers J.1.
'Flory' Dark Dirt fine clay wash then sealed with 'Alclad' Light Sheen (ALC311).
Now to apply the metallic wear by dry brushing,

Mike

(https://www.thatoneplease.co/buildlogs/JunkersJ1/weather1.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/weather2.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/weather3.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/weather4.jpg)
Title: Re: 1:32nd scale Junkers J.1
Post by: RAGIII on July 29, 2022, 11:09:54 PM
Looks outstanding with the weathering done Mike!
RAGIII
Title: Re: 1:32nd scale Junkers J.1
Post by: Mike Norris (UK) on July 30, 2022, 04:37:50 AM
Hi all,
I've dry brushed the metal corrugations of the wings, fin, rudder and tail plane, plus the struts, to give an effect of paint wear over Duraluminium.
The fin support struts, tail skid and aileron control rods have also been added.
The lower wing and struts are fitted as is the engine.

Now onto the fitting of the upper wing,

Mike

(https://www.thatoneplease.co/buildlogs/JunkersJ1/met2.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/engin.jpg)
Title: Re: 1:32nd scale Junkers J.1
Post by: RAGIII on July 30, 2022, 04:47:53 AM
Mike, That really is a great effect!
RAGIII
Title: Re: 1:32nd scale Junkers J.1
Post by: FAf on July 31, 2022, 05:37:22 PM
Really lovely balanced weathering. The dry rushing really makes it all pop.
/Fredrik
Title: Re: 1:32nd scale Junkers J.1
Post by: Mike Norris (UK) on August 01, 2022, 06:05:28 AM
Hi all,
Ask me how I Know  >:(
The upper wing, although hollow, is still a relatively heavy and large piece of the model.
As such, when attached to just the four outer struts, it will move and twist until the four inboard struts are fitted, which will make the fit of the wing more rigid.
Until then the upper wing can easily shear away from the four outer struts!!
Therefore it’s best to restrain upper wing movement as much as possible for the remaining construction of the model.
I used sponge packing pieces inserted between the wings, held in place by elastic bands around the wings and packing.

Mike

(https://www.thatoneplease.co/buildlogs/JunkersJ1/spong.jpg)
Title: Re: 1:32nd scale Junkers J.1
Post by: Alexis on August 03, 2022, 10:58:48 AM
Nice and dirty , I like it !


Alexis
Title: Re: 1:32nd scale Junkers J.1
Post by: PrzemoL on August 03, 2022, 06:18:56 PM
Spectacular progress since I last saw it.
Title: Re: 1:32nd scale Junkers J.1
Post by: pepperman42 on August 03, 2022, 10:08:07 PM
Great progress. The weathering is perfect for a ground attack machine. Your decaling and subsequent repairs are excellent. Good advice on the wing attachment process. Thanks!!

Steve
Title: Re: 1:32nd scale Junkers J.1
Post by: RAGIII on August 04, 2022, 07:31:49 AM
Not Bad For A Beginner  ;D OK, It is Awesome!
RAGIII
Title: Re: 1:32nd scale Junkers J.1
Post by: Mike Norris (UK) on August 05, 2022, 06:40:09 AM
Hi all,
The Junkers J.1 model is now complete apart from the propeller and exhaust stack, which are on their way from the Ukraine.
Here are the figures to accompany the aircraft.
I just have a refueling drum to finish.

As usual I'll post completed shots once the model is on its display base,

Mike

(https://www.thatoneplease.co/buildlogs/JunkersJ1/pilot.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/observer.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/mech1.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/mech2.jpg)
Title: Re: 1:32nd scale Junkers J.1
Post by: FAf on August 05, 2022, 07:35:33 AM
Several years ago you inspired me to paint a figure and then nothing more happened on the figure front despite a fairly good result. I should really get back to adding figures to finished builds. Looking forward to completion.
/F
Title: Re: 1:32nd scale Junkers J.1
Post by: Mike Norris (UK) on August 08, 2022, 09:53:39 PM
Hi all,
Final pieces for the Junkers display.
Medium size German refuel trolley ('Aviattic' ATTR011) and ladder from 'Modelkasten' figure set (B),

Mike

(https://www.thatoneplease.co/buildlogs/JunkersJ1/trolly2.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/trolly3.jpg)

(https://www.thatoneplease.co/buildlogs/JunkersJ1/ladder.jpg)
Title: Re: 1:32nd scale Junkers J.1
Post by: Mike Norris (UK) on August 19, 2022, 07:43:36 PM
Hi all,
Just an update.
The Junkers J.1 is still waiting for its propeller and exhaust to arrive from Ukraine.
They've been in transit since the 6th so I'm hoping they'll arrive soon.
Once they do I'll be able to post photographs of the completed model,

Mike
Title: Re: 1:32nd scale Junkers J.1
Post by: Mike Norris (UK) on August 26, 2022, 11:47:55 PM
Hi all,
Final model shots are now up in the 'Completed Models' page.

Mike