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Everything posted by Laurent
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The sketches are to the instructions what a storyboard is to a movie.
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Google "mirror edm". The hits will be roughly in two groups: mold maker claims and research papers.
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Nope to "you need to go Hasegawa or Fujimi". GWH.
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Nope.
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Portuguese Air Force Fiat G91- R3 Sidewinder Fit
Laurent replied to typhoon1's topic in Jet Modeling
Hey those rails in that nice artwork look actually accurate. Scroll down: https://www.academia.edu/12111956/Il_G.91_con_i_Sidewinder_sveliamo_la_storia_che_non_fu -
Portuguese Air Force Fiat G91- R3 Sidewinder Fit
Laurent replied to typhoon1's topic in Jet Modeling
I've only found a painting no photo. I've never seen missile rails like these. -
Portuguese Air Force Fiat G91- R3 Sidewinder Fit
Laurent replied to typhoon1's topic in Jet Modeling
That's a G-91Y. -
The 1/48 Tamiya also matches well those drawings.
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Perhaps you're thinking about my pictorial digression ?
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"Aviation Art" (I put quotes because AFAIK it's just a label not an actual company name) as a lot of mainstream producers do not make their toolings.
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Yes to the second point no to the first. Kitty Hawk doesn't had a QC process during design phase. For example the cannon fairing parts are not in the Etendard IV kit while they are present in the Super-Etendard kit. These kits are three years old.
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I didn't look at the kits myself but I think I remember reading that the location of the wings on the fuselage is better on HB than on BM. BM wings set too high apparently.
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EDM can achieve mirror-like surfaces nowadays and High-Speed Machining reduces or eliminates polishing.
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According to the CAD renders they carried the nose fix done on the IIIEA/EBR. Good ! I hope the landing gear will be weighted this time.
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You're an engineer so you know that a toolshop capabilities depend on the capabilities and availabilities of the equipements. For example surface details at the base of an anode are difficult if not impossible to make using a 3-axis CNC machine. 4 or 5-axis CNC is required.
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My interpretation: - 2nd photo is the final core of the mold - 4th photo is the anode for to produce the port slider I expect the middle-rear fuselage part mold to be composed of a core part and two cavity sliding parts. It's likely to me the part won't be attached to a (cold) runner. Similar mold breakdown to the GWH MiG-29 top part mold.
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I (and many people here I believe) would love to read it ! What publication and what issues ?
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Not "in contact" but "in close proximity". The idea is to maintain a voltage difference between the anode and the cathode so that sparks erode the cathode in the shape of the anode. If anode and cathode were in contact, no sparks but a short-circuit. Well this is how high-pressure plastic injection molds have been made for 40 years. What impresses me is the amount of ressources (machines, raw materials, man-days, etc) necessary to produce toolings. Retooling molds is something that's to be avoided at all cost so everything must be done to ensure that the CAD model has no breakdown and
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I believe there's a cavity mold half (outer side of the main parts with all the surface details) and a core mold half (inner side of the main parts with all the ejector pin holes).
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Well... "were impossible" given the equipement owned by the mold maker used by Airfix.
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Not too long I assume as it's on the pre-order list at Lucky Model.
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Reminder: Italeri is supposed to rebox the Platz kit... https://www.scalemates.com/fr/kits/italeri-1444-t-33a-shooting-star--1264793