Much sound DOES emerge from the rotor intake!

[SoundOff]

Youtube is easy to upload on. Go click "Upload" on the right of the header and log in using you member name and password you created your account with.

You'll go to a page where you can enter a title and description for your video. Put your title and description in then put some tags (siren fire truck emergency) and whatever category your video is. Afterwords, you'll go to a second page where you put the video file on and just let it upload.

I haven't tested uploading video on a dialup but I'm sure it will take a while.


Back on topic; I have a flashlight siren made in Hong Kong as well that orginally belonged to my aunt. Does it look like this one ?

[q2bman]

Cool, I would like a "dull" Q. Would look unique. Thanks for the spelling help but did you make your own contraction? Which'ave? Sweet.

I plan on mounting the thing on my Jeep Wrangler's front bumper. I've got a Q's little cousin mounted there now. A Q would just look like some weird wench to the unsuspecting public.

I'd also like some grover stutter tone airhorns to go with it. I need those little short ones that mount in ambulance bumpers.

I will then have to find where you live Robert and disturb your peice!

[Robert Gift]

I've never seen one but would sure like to see it.

Yes.
I try to savelectrons by sharing letters.
When I wasending Morse code I would use suchomemade contractions to beat everyonelse sending the same message.
"What fun is competing if you can't cheat?"

What is Q's little cousin? Sounds interesting. Can you post a photo?

I live in Aurora Colorado, and have an air gun which can shoot mush balls to clog such annoying horns.
I actually sent an e-complainto Rural-Metro Ambulance aboutheir
unecessary sounding of the siren andisturbing the [peace]
I travel the same route silently. Why can'they?

[Robert Gift]

Wow! Sound.

Wish mine were that nice.

Yours looks precision-made.

I would cut outhe the rotor intake guard and ribs covering the stator ports.
It's not like you could hurt yourself withose parts exposed.
Bet it would be louder withouthe statoribs.

I assumed that you throw the switch back to sound the siren, forward for light.
But NOOOOOooooo!
One click forward is light. 2nd click forward is light AND siren which doesn't get up to best speed because of lightbulb drain.

Also, I will apply glue to seal the rotor where there are leaks.
They seemed to miss the point about pumping air the that stator and chopping it. Leaks slow rotor speed and lower volume.

I'm now planning to make a siren with 6" PVC pipe as the stator.
But must find something to make a close-tolerance rotor.
I may have to sand down another PVC fitting so it will not stick and
will spin freely.

[AllSafe]

I'm now planning to make a siren with 6" PVC pipe as the stator.
But must find something to make a close-tolerance rotor.
I may have to sand down another PVC fitting so it will not stick and
will spin freely.

You could make the rotor out of a Sch. 80 end cap, but you would have to find one slightly less in inside diameter, have it turned down on a metalworking lathe to fit inside the pipe with about 1~1.5mm clearance, and then have it drilled at the precise center to make sure precision is maintained.

[Robert Gift]

Thanks Duro.

I was thinking the same.
But have'nt seen Sch 80 at Home Depot.

I also don't have a lathe

[q2bman]

Use a sch 80 end cap for the stator, thin and easy to cut, use the 6" sch 80 for the rotor? Sanding should get them loose. Sounds cool. I guess you could use two end caps indide eachother. Then you would have somethinf to atatch the motor shaft to.

MAN I just had a thought. What would happen if you spun both stator and rotor in oposite directions?

Wild.

[Robert Gift]

You would increase the frequency according to how fasthe
rotor chambers and stator ports aligned.

I thought of spinning the stator in the same direction of the rotor
so thathe rotor could be spun faster and suck in more air, meaning more powerful siren but withouthe frequency increasing accordingly.

I wonder whathe doppler effect wouldo?

[SirenMadness]

If you'd spin the stator in the opposite direction to the motor, you'd have a higher pitch, but a reduction in volume, because the air would not have enough time to escape from the rotor, depending on the speed of the stator. You'd need great speeds for that.
Spinning the stator in the same direction as the chopper would just give you a loud and choppy sound, with a pretty low pitch in most cases. The choppy sound would be the result of more compression.

I don't know allot as to how that much sound can come out of the intake cone, other than for the reason of the bursts of air out of the assembly spreading some vibration into the air inside the assembly, through intake cone.

[q2bman]

Cool, thanks.


Robert, What are you useing for fins?