Saturday, 26 November 2022

Tachikawa Ki-9 "Akatonbo" (Spruce) in 1/48 by George Eleftheriou - W.I.P. #2

In this second part, I will work on the cockpits of the other "Akatonbo" kits and try to make them more accurate.
As you perhaps know, apart from the prototypes, there were two "Spruce" models that went into production; Model Ko & Model Otsu (the latter was never called "kai" as Francillon mentions in his book entry). Their main external difference was in the design of the landing gear.

Tachikawa Ki-9 Model Ko

Tachikawa Ki-9 Model Otsu

But there were also differences in the cockpits. 
The illustration on p.20 in FAOW#73, shows what the cockpit of the Ki-9 Model Ko looked like. 


I'm confident it was based on the type's maintenance manual, and you can see various accessories, like bags that were not included in the Otsu.
We have in the Arawasi collection an original copy of the maintenance manual of the Model Otsu.

The Otsu manual does not include any overall cockpit illustrations like the one in the Ko manual and therefore we don't know for sure what exactly the Otsu cockpit looked like. But all Japanese sources agree that the cockpit of Model Otsu was much simpler than that of Ko, with various unnecessary accessories and features removed.
These manuals included all the features and accessories of the particular aircraft type and model accompanied by detailed illustrations to help the maintenance crews to service the aircraft. 
The manual for the Model Otsu does not include any electric system. There are no batteries or switchboards, as seen in the cockpit illustration of Model Ko and included in the Nichimo kit. 
There are no oxygen bottles behind the seats. These would be useful during higher altitude training, but this did not happen with the "Akatonbo"; high altitude training was undertaken with the Tachikawa Ki-55 "Ida".
The Otsu maintenance manual shows what the seats looked like.

Below is a photo of an original "Akatonbo" Model Otsu seat, courtesy of Kojima-san. 
The differences between the actual seat and those of the Nichimo kit are apparent.

The kit includes a pair of interesting control sticks. Again these were for the Model Ko, not the Otsu
Below is the manual illustration for the control sticks of the Otsu.

And a vintage photo that confirms the illustration.

Below are the Nichimo kit instructions in English.

In my opinion, the cockpit of the Model Otsu was very similar to the cockpit of the Tachikawa Ki-17, as can be seen on p.79 of FAOW#73. Basically nothing on the starboard side of the cockpit and only controls on the port side. 

I decided to remove all the switchboards and stuff on the starboard side of two "Spruce" models and keep the switchboard, only on one of my "Spruce" models. The logic behind it is that the switchboard was used to power the electrically heated pilot uniform and perhaps some "Spruce" had this feature for the schools that flew the type in cold climates, like in Manchuria. Unlikely, but what the hell.
I also modified the pilot seats as best as I could. First I tried to hollow out the bottom of the seat but in the end, opted to remove it completely and add a styrene piece. I also opened some holes in the seat sides, removed everything from the back of the seats and added two styrene rods.
Some seats turned out quite nice, some less so. Next year, when I buy my own 3D printer I'll try to create even more accurate and crisp seats. Yes, I have more "Akatonbo" models in my collection. As I said, I simply love this plane.
I also worked on new control sticks. I thought a lot about how to do it and in the end, I opted for the easiest option. A single 1mm styrene rod, lightly cut and bend the top and then file the top end until it looks like a handle. I think they turned out great. The bottom of the stick is supposed to end in a hole, as seen in the Ki-17 interior (FAOW #53, p.79). Highly unlikely that there was only a hole. If something fell in, it would be a bitch to remove and could mess up the controls, something not desirable at all. Taking into account other IJAAF and IJNAF a/c, I think the bottom of the stick was wrapped in a leather pouch. No photos to confirm this, though, so I decided not to waste more time on this and just glue the stick to the cockpit floor. Not the best looking, but hopefully will be able to fix this detail too with my 3D printer.  

I wanted to test your suggestions for the interior blue (hairanshoku) and this morning, after some acting up from the airbrushes, I finished one side of the cockpit.


The top paint is AK Interactive's RC329 hairanshoku (Grey Indigo). Not easy to find in Japan, mind you.
Middle is Tamiya XF-50 Field Blue.
Bottom is MrHobby H-54 Navy Blue.
Leave a comment and let me know what you think.

More coming up.

Thursday, 17 November 2022

Tachikawa Ki-9 "Akatonbo" (Spruce) in 1/48 by George Eleftheriou - W.I.P. #1

While waiting for my brand new "Sally" to arrive directly from ICM, I'm starting this thread to present the building process and the final results of 4, yes four, different Nichimo Tachikawa Ki-9 "Akatonbo" (Spruce) in 1/48, in a variety of markings.


The first kit will be almost out of the box because this is the very first bi-plane I'm ever building. Let's see the instructions for the cockpit.

Here's what I did.

Didn't change anything at all. The parts have some flash and they are really fiddly and delicate to work with. Let's see what the painting instructions say.

All the metal parts should be painted "aotake", actually IJA blue-grey, and the instruments on the fuselage side, black. Before I add the seats I need to paint the cockpit. On second thought, perhaps it would be better to paint the instruments and the fuselage sides first before assembling the "cage". I will do that in the second "Akatonbo".
I used MrHobby H-54 Navy Blue for the overall interiour colour, which I find the closest out-of-the-bottle paint for IJAAF aircraft. Red-brown for the leather parts. Washed with black, gray and brown Tamiya panel line accent. Also, dry-brushed silver to show scratches and weathering.
All in all, I think it looks quite nice.
After I add the pilots I think there won't be many details visible; we'll see.

21/11 Update.
I spent the weekend and most of Monday morning working on the fuselage interior. I wanted to accurately paint it and the kit instructions were quite accurate; the metal parts of the interior should be painted in "aotake" blue and the fabric surfaces in flat white. There are no known photos showing exactly how the whole cockpit of the "Spruce" looked like but from two photos I found, I could confirm the kit's instructions. The photo below from NARA was one.


A close-up of the cockpit area reveals that there is a darker area corresponding to the metal part of the cockpit and a lighter area corresponding to the fabric.

The main problem is, the kit doesn't help at all and after a lot of trial and error, I managed to paint the interior somehow accurately. Not 100% happy with the result though and I will try to improve things with the next kit. Anyway, I used a mix of white with a little buff to show the canvas but, again, I'm not entirely happy with the results. If you have any ideas about a good off-the-bottle paint for canvas, leave a comment. 

I also wanted to show, as best as possible, the stringers that held the fabric in place. I hadn't done this before and found the process particularly tedious. Keeping in mind that the cockpit frame is a very tight fit with the fuselage, I initially tried masking tape but it was very difficult to handle. I opted for sheet styrene strips of 0.38X1.00mm. They look okay but I have a feeling they should be thinner. 
Anyway, the way the stringers were arranged was also a mystery but, again, the photo above helps a lot.

You will notice that the wooden stringers are in contrast to the darker metallic frame further inside the fuselage.

While the stringers in the rear of the fuselage are clearly shown in the photo above, I had again difficulty finding what the stringers around the cockpit looked like.
Two different NARA photos give somehow conflicting hints.
Are the vertical cockpit stringers straight, at an angle or in reverse V?
I found the bottom photo first and built the starboard side of my model accordingly. But then I found the top photo and built the port side differently; BS ofcourse, don't follow my example.
Here's what the interior looks like now before I attach the cockpit and close the two halves.

Naturally, I'm far from happy with the result. But it was a learning experience and I hope the next "Akatonbo" models to be better. The silver lining is that the way the cockpit is painted is fairly accurate (metal parts are in blue, the canvas is painted as such and the stringers are in wood colour) and once the pilots are in there, very little of the mess I made will be seen.

In the next instalment, I will build the cockpits of the three other "Akatonbo" correcting the various mistakes of the kit. This one was out-of-the-box, the next ones will be far more accurate and hopefully more good-looking. 

Thursday, 10 November 2022

Japanese Hawker Nimrod

Our friend George Vanhove decided to build a model of a Japanese Hawker Nimrod and asked for photos.
I was able to locate only two.


One example was imported by the IJNAF and was evaluated by the Navy test department. They were not particularly impressed. The radiator hanging under the fuselage was the only notable feature. It received the designation "Nimrod Type Carrier Fighter AXH1".