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Hi there,

We're prepping for a Harry Potter themed front porch for Halloween this year. The porch will have hundreds of floating candles like the great hall.

We were thinking of creating some lightweight dementors and making them float.

Does anyone have any ideas on how to make them move/float? We were thinking of hanging them on an of zip line so they could swoop down and then using fishing line and a pulley to reset them to their first position.

Any other suggestions? :confused:
 

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Imitation Imagineer
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This may be a situation where artistic vision ultimately dictates the approach, but I think that if I were going to attempt to create a mechanized Dementor, I think I might consider a version of the Flying Crank Ghost.

For those that might not be familiar, there are a number of different versions, approaches, and mechanisms that have been detailed online (tutorials here and elsewhere, as well as videos on YouTube, etc.), and it seems as though it could be adapted for this application as well?
 

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Imitation Imagineer
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That video ^ is a nice example of how to pull off the look.....that design is clearly very lightweight, and has the right form / shape already.

On the surface, it seems like a small adjustmet at the 'shoulder' joint and 'elbow' joints might provide the necessary flexibility for an FCG assembly. The image below from the 'Phantasmechanics' tutorial might help illustrate:


armature.jpg
 

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Love the HP themed Halloween idea! The dementor prop screams FCG mech. Not sure if the Dayton motor is still available but you can sub in a wiper motor easily. I use an old ATX power supply from a PC and motor speed controller like [URL="http://https://store.qkits.com/dc-motor-speed-control/pwm-dc-motor-speed-control-module.html"]this one[/URL] -
 
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