UMS Agram visits the Fly With Us exhibition
Technical Museum Nikola Tesla
12 october – 23 october 2021.
FREE ENTRANCE
Organisers:
Technical Museum Nikola Tesla (TMNT)
Modelarski aeroklub Trešnjevka (MAK Trešnjevka)
Zagrebački zrakoplovno-tehnički savez Rudolf Perešin
We visited the exhibition of radio-controlled aircraft models Fly with us organized by the Model Aeroclub Trešnjevka in cooperation with the Zagrebački zrakoplovno-tehnički savez Rudolf Perešin, Zagreb Technical Museum Nikola Tesla and the City of Zagreb - City Office of Education from 11 to 23 October 2021.
The exhibition presented more than 40 models of different technical characteristics and specifics that represent different areas of aviation. From elementary school models and palm-sized sliders, which began the development of modeling, to advanced competitive models with a wingspan of more than four meters and jet-powered models, the exhibition covers all segments of aircraft modeling. Visitors have the opportunity to study the appearance and specifications of civil and military aircraft models from different historical periods, ranging from the seventies, from the beginnings of modeling, to the latest aircraft with technological and mechanical solutions such as piston and jet engines and airfoils with different modes flight, including acrobatics. The models are owned by hard-working modelers and MAK Trešnjevka, who with their long-term engagement work on the promotion of aircraft modeling and aviation in general. Five models from the holdings of the Nikola Tesla Technical Museum are also on display.
The aim of the exhibition is to acquaint the public with the work, curiosities and charms of aircraft modeling and to present the various challenges, opportunities and potentials of this hobby. Modeling has so far generated numerous aircraft designers, aircraft mechanics, pilots, flight controllers and other stakeholders in the aviation industry who, with their unconditional love for aviation, work every day to include new aviators in the modeling community and help achieve modeling goals and dreams.
CONTROL
PROPULSION UNITS
PILOTS
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Science behind Acrylic Paints
- Binders (eng. resin) – form a film – in our case probably pure acrylates, I suspect they are styrene acrylates.
- Fillers – in addition to adding volume to the paint, they also affect the viscosity, coverage and appearance of the dry film
- Pigments – the main division is into organic pigments and inorganic pigments. Inorganic ones are more covering but have less vivid shades, while organic ones are often quite poorly covering (yellow for example) but their shades are vivid and bright
Additives:
- Anti-foam
- Rheological modifiers – affect the behavior of wet paint on the substrate (e.g. spillage) and the behavior of the paint when a force is applied to it (brush, roller, spray, airbrush). Rheological modifiers also include thickeners that affect the viscosity of the paint.
- Dispersants – envelop pigment and filler particles and prevent their agglomeration during standing. Good dispersion of pigment and filler affects the coverage and uniform appearance of the dry film. There are a bunch more but I won't go into too much detail
- Solvent – in this case water.
Contrast paints and speed paints – high pigment content, but not so much that it causes high coverage. They are formulated to spread, not to stay where you put them. The result of spreading is that the paint collects in the recesses, where a thicker film of paint remains than on the protruding parts of the miniature. Where the film of paint is thicker (the recesses), the shade of the contrast paint is more pronounced, unlike on the protruding parts where the film is thinner, which is why the shade is then influenced by the color of the substrate.
Composition:
- Binders
- Pigments
- Additives – all listed above + surfactants that reduce the surface tension of the wet paint film, which is why it flows
- solvent
- I would say they do not contain fillers, or contain very, very little of them
Washes – similar in formulation and behavior to contrast agents, only they have a much lower proportion of pigments, certainly no fillers, a higher proportion of surfactants, lower viscosity, and probably less binders.
If we want to greatly dilute acrylic paint or contrast, it is better to use a product intended for this purpose from the manufacturer of that paint rather than water, because it contains all the necessary amount of binders and additives for that paint to retain its properties.
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U ovom članku, naša Dunja nam otkriva znanost iza akrilnih boja.
Akrilne boje – visoki udio pigmenta i dobra pokrivnost. Ako su dobro formulirane ostaju tamo gdje ih naneseš, ne ostavljaju „brush marks“ i suše se dovoljno sporo da stigneš napravit što želiš na minijaturi a opet dovoljno brzo.
Sastav:
- Veziva (eng. resin) – formiraju film – u našem slučaju vjerojatno čisti akrilati, sumnjam da su stiren akrilati.
- Punila – osim što dodaju volumen boji utječu i na viskoznost, pokrivnost i izgled suhog filma
- Pigmenti – glavna podjela je na organske pigmente i anorganske pigmente. Anorganski su više pokrivni ali manje živih nijansi, dok su organski često dosta loše pokrivni (žuti npr) ali zato su im nijanse žive i jarke
Aditivi:
- Protiv pjene
- Reološki modifikatori – utječu na ponašanje mokre boje na podlozi (npr razlijevanje) i na ponašanje boje dok na nju djeluje sila (kist, valjak, sprej, airbrush). Pod reološke modifikatore spadaju i ugušćivači koji utječu na viskozitet boje.
- Dispergatori – obavijaju čestice pigmenata i punila i sprječavaju aglomeraciju istih stajanjem. Dobra dispergiranost pigmenta i punila utječe na pokrivnost i ujednačen izgled suhog filma.
- Ima ih još hrpa ali neću toliko u detalje
- Otapalo – u ovom slučaju voda.
Kontrastice i speed paints – visoki udio pigmenta, ali ne toliki da uzrokuje visoku pokrivnost. Formulirane su da se razlijevaju, a ne da ostaju tamo gdje ih staviš. Posljedica razlijevanja je skupljanje boje u udubine gdje onda ostane deblji film boje nego na isturenim dijelovima minijature. Tamo gdje je film boje deblji (udubine) nijansa kontrastice izraženija, za razliku od isturenih dijelova na kojima je film tanji zbog čega na nijansu onda utječe boja podloge.
Sastav:
- Veziva
- Pigmenti
- Aditivi – svi nabrojani gore +
- surfakanti koji smanjuju površinsku napetost mokrog filma boje zbog čega i dolazi do razlijevanja
- otapalo
- rekla bih da ne sadrže punila, ili ih sadrže vrlo vrlo malo
Washevi – po principu formuliranja i ponašanju slični kontrasticama, samo imaju puno manji udio pigmenata, sigurno ne sadrže punila, veći udio surfakanata, manji viskozitet i vjerojatno manje veziva.
Ako želimo jako razrijediti akrilnu boju ili kontrasticu bolje je koristiti za to predviđen proizvod od proizvođača te boje nego vodu, jer sadrži svu potrebnu količinu veziva i aditiva kako bi ta boja zadržala svoja svojstva.
" ["created"]=> string(19) "2025-11-20 13:03:37" ["modified"]=> string(19) "2025-11-20 13:03:37" } ["Member"]=> array(10) { ["id"]=> string(2) "64" ["group_id"]=> string(1) "1" ["first_name"]=> string(9) "Krunoslav" ["last_name"]=> string(8) "Belinić" ["first_name_mask"]=> string(9) "krunoslav" ["last_name_mask"]=> string(7) "belinic" ["username"]=> string(5) "Kruno" ["password"]=> string(40) "eb3fda45fbec0258e90d809803b10491c548b22f" ["born"]=> string(19) "2015-01-18 09:19:00" ["created"]=> string(19) "2015-01-18 09:20:39" } } Krunoslav Belinić, 20th November 2025 - We attended: ModelMania 2025 Marko Paunović, 5th November 2025
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