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Building report about a Sikorsky S-64F Skycrane in scale 1:32, which can then fly


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I've always wanted to make a little Skycrane fly. But the plastic model in 1:72 was rather too long for the available mechanics. There would have been problems with the rear engine, which is very far behind. So the thought died.

Then about 3 months ago Ian (Wafu) wrote me if I could help him with his scratch project with some details.

His desired decal set of the Forestale variant was drawn relatively fast. It's always a question of how well pictures or drawings are available as templates.

 

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The design of the input and output parts of the engines was more complex. Only after pictures this was possible, but then Wafu had better material - the manual of the Skycrane. There are very good drawings and cracks in it, on the basis it draws much better.

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Then I had slowly caught fire myself. I zoomed a three-sided tear (there is not much good there) to 1:35 and looked at the measurements.

 

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Only the Blade 230S or 250CFX could be used for the size mechanics. Both have a main gear with a diameter of 70 mm. But that was clearly too big. The fuselage was only 58 mm wide.
So I had the idea to zoom the plan again to 1:32. That was enough. 64 mm fuselage width.
I already used smaller gears on both helicopters several times (mostly with smaller pinions). 60 mm main gear is ok. Thus my planning began to build a flying Skycrane in the scale 1:32.

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The basic shape of the fuselage is rather simple and could be constructed quickly (I use Fusion360).
I learned this a half year ago in about 20 hours from an expert in learning by doing. Geometric bodies are no problem since then, non-geometric bodies (like the bow part) I can't really do yet.


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This hull is halved and divided into segments (our printers can only print parts). These are printed as shell (to save material).

 

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The individual parts are glued and filled. The rear part remains deliberately extra.

 

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5 hours ago, Lupusprimus said:

Main rotor 650 mm(25.5906 inches), tail rotor 157 mm (6.1811 inches).

Fixed it for you.....(Another in the long line of Canadians explaining stuff to Americans 😃)

Edited by RCAFFAN
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