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TOPIC: Lighting Rapiers on the Flying Field

Lighting Rapiers on the Flying Field 5 days 11 hours ago #2072

  • Aquarius
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The igniter is made of an aluminum tube (left over from some printer toner), a switch, screwed electrical connectors, wires, and two 2x1 mm brass tubes. The igniting element is a 0.35 mm kathal wire. The bottom and head are printed on a 3D printer. The fuse is 100% effective. It is intentionally powered by quite large and heavy R14 batteries, but in the future the igniter will also power the charger of models with a capacitor drive. The batteries are soldered to ensure current flow.







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Lighting Rapiers on the Flying Field 5 days 11 hours ago #2073

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I want one!

:lol:

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Lighting Rapiers on the Flying Field 5 days 10 hours ago #2074

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Igniter is as simple to build as possible. Just find a pipe (alu, PVC, paper, composite) with a diameter that matches the diameter of the cell. I can design 3D files and send them to you. 3D printing is not a problem today, the rest is simple.







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Lighting Rapiers on the Flying Field 3 days 13 hours ago #2083

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This is my latest version. The box is laser cut from MDF. It's much the same as the version I put up a few posts back.
There's a cover, removed for clarity for the underside.
The cable to the right is the charging cable. One must disconnect the battery, connect the charging cable to the battery and the other end of the charging cable goes in a mobile phone charger.
The battery is a 3.7V 18650 Akku, 3200mAh which, so far seems to be adequate.
18650
The heating element is made from 'flat' nichrome 0.4mm wide by 0.1mm thick. This folds quite nicely into the familiar 'hairpin' shape. I start with a piece 65mm long and fold it in the middle. The two ends are each folded back 5mm or so and then mounted in the terminal block.
I found a German supplier: Zivipf for the flat nichrome wire.

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