1/18 scale Instytucie Szybownictwa IS-A Salamandra 53 scratchbuild model

The text following is to describe the 1/18 scale Instytucie Szybownictwa IS-A Salamandra 53 (1953 version) glider model building, as produced by aviation factories throughout Poland.







Düzenleyen Nick_Karatzides - 29/01/2016 Saat 02:48

CHAPTER II - Meeting the Salamandra glider

“WWS” is an abbreviation of "Wojskowe Warsztaty Szybowcowe" (meaning “Military Gliding Workshops” in Polish language), based in Krakow, Poland. Founded on 1935 by Waclaw Czerwinski who had taken over the management. The MRP-1 Salamandra project, was the first project which was created under his leadership. The Salamandra was a training glider, who had excellent flying characteristics, so that it was decided very quickly to take over in mass production in various workshops throughout Poland. Before the WWII, the Salamandra glider was also built under license in Yugoslavia and after 1943, the "Salamandra" was also produced in Romania. After the WWII, the production started again with a re-engineered version made from the “IS” which is an abbreviation of “Instytucie Szybownictwa (meaning “Gliding Institute” in Polish language), under the name Warszawa IS-A Salamandra. During the 1950ies, the Salamandra glider has been built in China, where a two-seater version was also created. Around 500 Salamandra gliders have been built around the World, up to date.







The glider was also known by nickname "Czuwaj" among the Hungarian Boy Scout Association, which was the Polish version of the standard Boy Scout motto.



The WWS-1 Salamandra glider, also inspired the Finnish Pik-5 design. The Yugoslavian built version was developed by engineer Ivan Šoštarić in 1939 and built by UTVA Panćevo factory as “Šoštarić UTVA Čavka”. After the end of WWII, the Yugoslavian built “Čavka” model was widely used in Greece and became very popular among the glider aviators. Both Athens aeroclub based at Tatoi airfield and Edessa aeroclub based at Panagitsa airfield, used these gliders for young aviator training purposes.





Construction of the Salamandra glider was entirely of wood with fabric covering on wings and tail unit. The fuselage consisted of a plywood covered nacelle for the single seat cockpit, with a wire-braced open strut rear fuselage supporting the cruciform style tail-unit. The high mounted wire braced wings were supported by struts from the bottom of the fuselage to approx 1/5 span. Later versions introduced windscreens and airbrakes in the wings. Wooden skids under the tail and fuselage nacelle comprised the undercariage.









Düzenleyen Nick_Karatzides - 29/01/2016 Saat 02:59

3D printing on IMHO for a better surface result, a CNC; a DIY solution of mine, I think it'll be operational next week.

CHAPTER IV - Attempting to join the basic parts

As soon as the individual scale model’s parts were already produced, cleaned & dry fit tested, I had to assemble everything as one piece, without damaging the frame construction. Just because the Salamandra was entirely constructed of wood, I decided that its much better to assemble all model’s parts first, sand if required and later apply paint and weathering effects as a final touch. During assembling process, everything was secured in place & glued with CA liquid adhesive superglue, which found at local market for 0.16 € per tube (each 12-tubes card, costs 2 € only). It does bonds in only few seconds, reaches extremely strength at room temperature and it is suitable for materials such as wood, rubber, plastic, metal, ceramics, leather, marble, polyethylene, polypropylene, teflon etc. Once I´ve tried this CA superglue on my scale models, I’ve never go back.



Following the 1/18 scale printed diagrams and using a new sharp Nr 11 stainless steel surgical blade and 4x4 mm sectioned styrene rod, it only took about 2 minutes to prepare the basic tail boom frame. The supporting frame consists of two 228 mm long beams that join the front compartment (cabin & wings), with rear part (tail elevator & stabilizer fins).











The only piece that remained without gluing, is the tail rudder fin which will be set in place after paint. The glider model’s wingspan is now fully developed and looking really big as it is spreading lazily all over my working bench - approx 70 cm from one wingtip to the other.



Some tiny gaps between the parts connections, were filled with putty, applied with an old brush. As soon as the joints between the cabin, wings & tail boom parts were securely glued with CA superglue and later filled with putty on tiny gaps, it was carefully sanded with nail files & sanding sponge block, found at the local beauty care shop - the only good moment when following wife on her shopping. They are cheaper than dirt, since each nail file cost € 0.1 (each 10-nail files card, costs € 1 only) and the sanding sponge cost € 0.5 per block.





When it looked OK to me, the whole model was sprayed over with Humbrol acrylic primer to spot any mistakes and placed into a box to wait the final paint applying.



Düzenleyen Nick_Karatzides - 29/01/2016 Saat 03:20

That's what I call scratch building of a model kit. Following up!

So glad that the bad news has turned into a good one. Stunning work.

CHAPTER VI - Grass field display base construction

When I started this project, I was concerned about the proper display option, on which the model would be placed. For this reason, I asked fellow modelers to advice on how they would do if in my position. Talented & world class scale modelers such as Mr. Rick Lawler from AK interactive team, honored me by sending their kind answers, suggesting what best to do according their opinion - I thank them all. Most of the responses I got, recommended simplicity & austerity with no extra diorama features. Just to place the cutaway shaped model onto a dark colour or black) shiny laminated wooden base, so that nothing would distract viewer’s attention from main subject - the Salamandra cutaway.

Following their advice, I tried some dry fit tests with few spare laminated wooden bases I had, to check how it looked like. I tried different shades of wood and finaly black sheet of plexiglass. Evidently the visual experiment clearly proved that the model got nearly disappeared into the natural wooden base's background, regardless of whether the background was light, medium or dark wood. Since the actual IS-A frame was entirely made of wood, it seemed that placing the model on a wooden base, might not be good idea. Black plexiglass tests, also didn’t looked right to me.





I also received suggestions for mounting the glider on a clear pole which seemed nice idea, but model’s cutaway stucture was too fragile to be securely pinned on a single point. I also tried to digitaly create a virtual model, with the glider placed on a concrete tarmac or shiny black ground, cut on Poland’s map shape - since the IS-A was a typical sample of pre WWII Polish aviation design.





I was almost sure I was going through a non-creative phase and getting ready to pack the model in a box and store it until having some good idea. Unexpectedly, I became obsessed with the idea of placing the glider model on a "grass airfield" dio base. Probably, my opinion had been shaped (aka influenced) by viewing the following two pictures, where the IS-A glider is laying on the Spring green grass.





My goal is to recreate a scene of an aeroclub small airfield, where the old Salamandra is now resting in peace. I ‘ll try to place the glider in such a way that will look like an old time abandoned wreck, with all plywood & fabric lining removed, tilted sideways to rest on the short green grass field, with one wingtip touching the ground and the other on air. Some torn fabric & plywood parts would be also laid nearby, some rusted & cut wires, possibly a couple of Marsden matting / PSP - Pierced Steel Planking plates or maybe a waving windsock etc. could be also present in scene. In general, a picture of terse abandonment, without extreme features that could distract viewer’s attention, keeping the glider as the main protagonist of the story. From an artistic point of view, the abandonment might possibly dictate everything to be into a state of complete wreckage. That would not be the desired result, because it would lead into a diorama scene, where the Salamandra would no longer be the protagonist. My aim is to balance the scene, while filling empty space & keeping the IS-A as the only "model" on display.





I found the idea of a deflated windsock nice, in order to fill some empty space and break the monotony of green, while remaining in scene's background same time. Although a picture of a torn windsock would be more atractive & interesting, I had to keep it simple and not overdo. Using a small amount of Milliput putty, I made a small ball, dust it with talcum powder and pressed it against the working bench with a roller until it becomes as thin as could get. The use of talcum powder is necessary to avoid Milliput sticking on roller or fingers and get easier to handle without tearing to pieces.











While Milliput putty was still soft, I cut it into triangle shape and rolled it up, to form into a right to scale windsock cone. Then, the cone was bended as required to look deflated and simulate cloth’s weight. The result made of epoxy putty (seems like elephant's proboscis or its just my imagination?), left few hours to get fully polymerized and then I cut the tip to achive the correct lenght dimensions. Few epoxy overcast remains that were left, also removed during cutting process. Internal frame added later, using metal wire & styrene rod.

















Düzenleyen Nick_Karatzides - 29/01/2016 Saat 04:07

Once the acrylic paint dried, the outcome had tonality differences and looked like been faded by the sun. I had obviously overdone on highlighting the areas and therefore I had to fix this and make the shades softly blend each other. To do so, I mixed artists oil paint "Red" by MIG Productions “502 Abteilung” series and artists white spirit by "Winson & Newton“ in a ratio of 5% / 95% (actually a filter) and sprayed over the windsock. I hope now it looks better than did before.









Meanwhile I found some time to deal with the green grass. Having a couple of different methods in mind to simulate green grass in scale, I found good idea to follow an old fashioned technique! I planted some grass seeds, watered daily and I'm now expecting to grow high grass soon. I’m just kidding of course - watering once every three days, is enough. Kids, don’t try this at home.



Progress has been slow for various reasons, including:

[*]I'm slower than a turtle trying to climb a muddy creek bank,
[*]I always find errors and later trying to develop ways to make model look more realistic,
[*]Mid-July heat & expectation of upcoming vacations, caused laziness that lead building process to slow down,
[*]Wife visits my bench, holding a hammer and that could possibly means that it's about time to quit 1/18 model for a while and give full attention on 1/1 model.

Due to all the above reasons (aka excuses), once the windsock painting process complete, I had to stop for a short relaxing brake and puzzle things out. Next update ETA, late August or early September. Summer is typically the time for vacations and a good chance to relax, unwind & recharge batteries. We all need a break once in a while and I am no exception. I hope you can do the same and enjoy some well deserved time off. I will be back soon, picking up where I left off and complete this project. In the meantime, I plan to unplug, disconnect from anything for a few days, enjoy sunny beaches & crystal waters and hopefully have some SCUBA fun with playful dolphins - as happened last summer.

















Düzenleyen Nick_Karatzides - 29/01/2016 Saat 04:55

The whole grass field scene would require a 50x40 cm display base, considering that glider measures approx 70 cm wingspan in 1/18 scale. That could be a problem for my show case in home, which yes, it is big, but not big as an elephant. From the MDC - Model Display Cases store, I bought a 50x40 cm base, made of polished beechwood with MDF core.



Those who have read my previously uploaded projects, might remember that I prefer using plaster powder to build the section that recreates the ground, especially if it is asphalt. However, the 50x40 cm dimensions of the scene dictate plaster quantity more (and therefore heavier) than usual and for this reason I chose to use another material, because my goal was to build a “grass field display base” instead of weightlifting equipment for champs. For this reason, I purchased a 50x40 cm size & 10 mm thick sheet of balsa wood from my local hobby shop, which I cut & shaped around with my cheaper than dirt Black & Decker 400 W / 3000 spm jigsaw bought for 20 € only. The basic idea, is to produce a thick & flat surface which protrudes approx 10 mm beyond the polished beechwood base, on which later green grass & extra stuff will be added where is needed.







Remember that operating a freehand held jigsaw could be a bad idea if not pay attention on job. Sawdust may also cause problems when breath or shallow. A powerful vacuum system to suck away the dust should be used all time to keep the workbench area clean. Using a breathing mask & pair of protection glasses to prevent dust contact with lungs & eyes, is also an important matter that you should seriously take care of. My recommendation is to also wear working gloves - made of kevlar if possible.



Düzenleyen Nick_Karatzides - 29/01/2016 Saat 04:56