An air raid siren powered by a brushless motor (RCTimer 5010-360KV). It has a total weight of 440 gr. So it can be mounted on a copter.
The only Part that needs support is "Sirene Rotor1".
I print on a replicator 2. The files "Sirene Wand" and "Sirene Deckel" are oversize. If you print it on a replicator 2 you have to cheat a little bit by moving the parts towards you (in y-axis).
Here is how it sounds...
The aditional parts you need:
- Motor: RC Timer 5010-360KV
- RC-Stuff: an ESC with 20A, something to get the signal to the ESC
- 4 screws (M3 20mm)
- a bearing (5mm inside, 11mm outside, 4mm width - the same as the one used in the RCTimer motor)
I already thougt about using an arduino or rasperry pi to do some kind of alarms. Shouldn't be that hard to realise. But i haven't work with this stuff until now... But would be a very effective alarm clock in the morning :D
Support is only needed on the Part "Sirene_Rotor1"
The Space between the rotor parts and the shell has to be as small as possible. So it is drawn quiet tight, If it is scratching on one site you have to use some sand paper.
For the rotor parts i used some glue. Put might also work by only sticking them together.
The support in part "rotor1" has to be removed very well. Otherwise it wont be running free,