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Make bubble windows – Easy “free-blown” plastic parts

Many full-scale airplanes and helicopters feature bubble windows to allow the crew greater visibility. Replicating these windows can be tricky for scale modelers, as it’s inconvenient to make a vacuum-forming plug for each uniquely shaped window frame. In full-scale aircraft manufacturing, these bubble windows are almost always free-blown from sheet plastic clamped in a frame. This makes the tooling minimal, with the added benefit that the depth of the bubble can be adjusted for each...

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