1/18 scale Jukka Tervamäki JT-9T autogyro scratchbuilt model

[Sabre F-86]

Nick, regardless of the curse, you are doing a fantastic job on this little autogyro. I'm looking forward to seeing more on it. Your techniques are being assimilated even as we speak. I hope to use some of them on my next scratch built attempt.

 

Rgds

 

Sabre

[Nick_Karatzides]

Some update pictures after washing / weathering / color fading. Control cables are already installed. Still remain to be added:

• The canopy,
• Both propellers,
• The radio device & GPS,
• The engine control levers,
• The windshield and windscreen wiper,

and also paint some details such as engine cables etc.

 

Edited August 9, 2018 by Nick_Karatzides

[bigern007]

WOW!!!!!....What a great saga.What a great recovery

 

What a great bit of modelling...We are all very impressed!

 

Thanks......Ernie

[Nick_Karatzides]

Details on the rotor blades and the engine. The rotor blades are made of sterene sheet softened in boiling water to stretch 'n' turn in a way to look realistic. Soft sanding applied on the blade's leading edge to be shaped as it should be. The spinner cone was made of an old 1/48 scale fuel tank tip, found in sparebox.

 

Edited August 9, 2018 by Nick_Karatzides

[Nick_Karatzides]

My little JT-9T princess is posing for the camera...

 

Edited August 9, 2018 by Nick_Karatzides

[bdthoresen]

Nick-

 

Wow, that model sure is stunning! I am very impressed. I especially like the Sparco harnesses in the cockpit....Nice Touch!!!!

 

Cannot wait to see what is next.

 

THOR

[LSP_Kevin]

Your latest pictures aren't showing up for me Nick. I can see that you've linked them correctly, and LSP tries to download them from your image host, but eventually it just times out with nothing. Frustrating!

 

Kev

[Marek]

WOW! What the perfect modeling job Outstending sctatchbuilding, painting and wethering. The model is stunning and the so anusual too. Great realy Congratylations.

Kevin it is frustrateing I can gues! But strang that the pictures show to me fine!?

[LSP_Kevin]

But strang that the pictures show to me fine!?

 

Ah, thanks Marek. It's good to know that the problem is at my end. Knowing how good Nick's build is, I'd hate to think that all of LSP was missing these latest photos!

 

Kev

[Nick_Karatzides]

CHAPTER X - Epilogue

 

Final details were added. VHF radio with headphones in the cockpit, mobile phone, seat belt buckles, main rotor control bars, cables, etc. To break the monotony of red, a toolbox and a tow added into rear storage area. At last, transparent plastic card were placed to simulate the wind shield glasses and of course the canopy in the open position.

 

Close-ups of scratchbuild engine. Although initially I plan to represent a brand new bright and shiny engine I discovered that it would not fit the with a faded, dusty and weathered autogyro. That is why I preferred to add much wear, stains from oil and scorched medals at several points and some rust as example in the exhaust.

 

Edited August 9, 2018 by Nick_Karatzides

[Nick_Karatzides]

The controls in this two-seater model autogyro, as with any trainer aircraft, perform the same movements. Feel free to notice the rudder pedals and you will see that the front and the back seat, right rudder pedal is pressed to full FWD possition, bringing the left ruder pedal in full AFT possition . This has resulted in turning the nose wheel to the right and turning the rudder of the tail in such a way as to twist the autogyro to right as defined by the position of the rudder pedals. Also notice that the throttle lever of back seat is attached on a bar connecting to the front seat engine throttle so to move simultaneously. The engine's power transmission is made with a wire, launched by the front seat throttle lever and lead the assembly of the engine. Finally, the control sticks are fallen slightly forward, which of course means that the elevators are set in a similar position. Also notice that the position of controls (stick, rudder pedals and engine throttle) meet the relative position of the elevator and rudder fins, the nose wheel, etc. The front & rear seat rudder pedals perform exactly the same movements as linked to the same wire transmission. If you also check the rudder pedals position, you’ll notice right rudder pedals pressed front end, bringing the left rudder pedals full back. As an effect, the nose wheel turns to the right and rudder fin turns in a way to turn the autogyro to the right as defined by the position of the rudder pedals. In similar manner, both control sticks (which perform exactly the same movements as they are connected to the same bar drive) are positioned slightly forward. This has the effect of elevator fins rotation so as to oblige the autogyro in the descent, as defined by the position of the control sticks. In a similar position the main rotor head is placed as required. As it is known, the autogyros and the helicopters leans to the left or right, elevates nose up or descent nose down, by turning the main rotor blades disc and secondarily to aileron and elevator fins (if present) and turn to left or to right with the rudder fins (autogyros) or tail rotor (helicopters).

 

Edited August 9, 2018 by Nick_Karatzides

[Nick_Karatzides]

I’ve been asked about the available space where the rear passenger puts his feet on. From the pictures of the model have been published, and the art images found on the article’s first page, it appears that the rear seat is too close to the back of the front seat - and it is also clear from the blueprints of the real autogyro that it’s not my own assumption or a model building mistake. In real autogyro, rear passenger's feet are not squeezed behind the front passenger seat back, but they are placed left & right of the front seat! To make it more understandable, have a look in following pictures, showing a tandem cockpit seating positions as described:

• The green lines represent the front seat passenger and the position of his feet on the rudder pedals and
• The blue lines represent the rear seat passenger and the position of his feet on the rudder pedals.

Edited August 9, 2018 by Nick_Karatzides

[Pfuf]

Realy Wonderfull build something realy diffrend from the normal builds we see.

 

johan

[Nick_Karatzides]

CHAPTER XI - Tarmac & grass display base construction

 

It’s been few months since the JT-9T project was complete. I found nice idea to place it on a display base, simulating an airfield area with concrete ground. The idea was to establish an idea of an abandoned small airfield, now used by general aviation pilots for their weekend excursions. From my local store, I bought a 20x30cm polished wooden picture frame.

 

 

I add some grams of plaster powder and few drops of water with a syringe into a soft rubber cup to make the right mixture. Materials like plaster, start as a dry powder that is mixed with water to form a paste which liberates heat and then hardens. Unlike mortar and cement, plaster remains quite soft after drying and this characteristic make plaster suitable for the job. Keep in mind that adding salt into wet plaster mixture, reduce the plaster's hardening time and adding vinegar into wet plaster mixture, extend the plaster's hardening time. When the first layer of thinned plaster applied on the picture frame, a glass were pushed against the plaster to form a flat basic strong cast. The basic idea, is to produce a totally flat cast and later add some detail or apply extra stuff where is needed.

 

Edited August 9, 2018 by Nick_Karatzides

[Nick_Karatzides]

I left it few hours to get harden in order to be sure that the cast wouldn't break when I would try to cut it into desired shape. Meanwhile, I took the soft rubber cup which I used to make the plaster mixture, squized it to break the last hardened plaster left inside, so it would be easier for me to clean it afterwards and prepare it for any future mix. That's the reason this soft rubber cup were used for.

 

 

As soon as the plaster cast got harden, cut into shape and the concrete plaques were lined with a scriber, I used my airbrush to paint it. After the polished wooden frame was covered with masking tape, three different acrylic paint layers were applied on the plaster surface. First, mat black colour covered the area and then a light grey applied with airbrush, spraying in almost zero degree angle, to let the darker areas between the concrete plaques remain naturally dark. The corner was paint with earth tones and as soon as the acrylic colours dried, I tried some drybrushing on selected spots using sand tones.

 

Edited August 9, 2018 by Nick_Karatzides