Air Raid Siren Mk.1 Prototype Rotor Assembly (12 Port)

An air raid siren rotor I created via Tinkercad. It is 12-ports and needs approximately 3,000-3,500 RPM for a good tone. May be modified later on for new sound output. Check my page to see the stator as well. Also, the axle is thin and may snap. Using PLA is OK but I recommend using stronger filaments so the axle won't snap. The axle does not fit perfectly through the gap in the stator to allow the use of wheel bearings. You must use bearings that are 1/2 inch or 13 millimeters of diameter and the center gap's diameter must about 3/16 inch or 5 millimeters. Motor is not included, obviously and housing, horns (square and round) will be designed soon. To assemble, make sure the main assembly is facing up. Take the rod connected with the base and have it upside down. Put it through the gap and superglue it so it does not rotate by itself, rather with the rotor. Take the other ring and flip the assembly over after the super glue dries. Then, put the ring through the rod and super glue it as such so it goes through the rod and comes in contact with the main assembly as well. If you have the other part, then put the rotor through the stator.

This assembly is to be used among other parts currently being modeled. This includes the motor housing, horns, stator, motor, axle, (MOTOR NOT INCLUDED, AXLE TOO BRITTLE)

GENERAL INFO:

Port Ratio: 12

Tonality: Single (Dual coming soon)

Tone: 2900-3000RPM = C#5

Rotor rotation limits: ~3500-4000RPM (for PLA, which i'm using)

Decibel output:

-With stator and motor only: 85-95 dB

-With above and horns: 95-100 dB

Dispersal: Omnidirectional (Rotational model coming soon)

Horn shape (separate model): Flared Square

Model number coming soon

Coded: Depends (Coded and standard intake printed. Solenoid dampers are a separate model and the actual solenoids driving the dampers are obviously not included. The two types of the dampers included are coded and hi-lo. Hi-lo gives a hi-lo tone and is barely smaller than the coded damper. The coded damper is bigger by about 1 mm and almost fully encloses 

2/23/26 UPDATE:

     Use a more firm axle, such as a metal one. The axle attached to the disk next to the plain washer/ring is too brittle, and motor may be damaged.

 (NOTE: Read before usage. I will not be considered responsible for hearing damage or loss due to the finished assembly's output. You will be held accountable for your damage.