Dennis Kunkle
 
Posts: 16
Joined: Sat Feb 17, 2018 10:18 pm

Re: New guy first post

Thu Oct 11, 2018 12:06 am

We acquired a fiberglas horn from the guys in Michigan and a local sheet metal shop made a spiral ductwork elbow work. Two 12" bolt flanges from Graingers connect the horn to the elbow. We' are going to paint this new stuff with Army green and an artist friend says that she can age it to match. That's my volunteer standing there.

Image

I'll soon post a video of it spinning while an actual recording of a siren starting up and slowly shutting down in one revolution.

Dennis Kunkle
 
Posts: 16
Joined: Sat Feb 17, 2018 10:18 pm

Re: New guy first post /UPDATE

Thu Oct 11, 2018 12:34 am

An acquaintance in Ohio has an original metal horn. He sent me the measurements and I compared them with the fiberglas horn and they were all but identical. We'd love to get the engine shroud if anyone knows where one is lurking.

User avatar
Model L
Global Moderator
Global Moderator
Posts: 621
Joined: Wed Dec 28, 2016 4:19 am
YouTube Username: Egress
Discord: Egress.
Location: Beaverton, Oregon

Re: New guy first post /UPDATE

Thu Oct 11, 2018 3:48 pm

what speed does the motor spin at?
Resident of Beaverton, Oregon
Proud owner of 2 Model L's and a 1984 WS-3000 serial # 717
19 years old
want to chat? send me a request on discord: Egress.#7444 or DM me

Dennis Kunkle
 
Posts: 16
Joined: Sat Feb 17, 2018 10:18 pm

Re: New guy first post /UPDATE

Thu Oct 11, 2018 11:22 pm

The motor is 1725 rpm. If you are referring to the whole unit, it takes about one minute to make one complete revolution.

User avatar
Model L
Global Moderator
Global Moderator
Posts: 621
Joined: Wed Dec 28, 2016 4:19 am
YouTube Username: Egress
Discord: Egress.
Location: Beaverton, Oregon

Re: New guy first post /UPDATE

Fri Oct 12, 2018 3:15 pm

oh, so not that fast then. it should make a good display!
Resident of Beaverton, Oregon
Proud owner of 2 Model L's and a 1984 WS-3000 serial # 717
19 years old
want to chat? send me a request on discord: Egress.#7444 or DM me

User avatar
FahmiRBLX
Registered User
Registered User
Posts: 216
Joined: Fri Oct 28, 2016 7:01 am
YouTube Username: FahmiRBLX
Location: Either Selangor, Malaysia or Kerbal Space Center
Contact: YouTube

Re: New guy first post /UPDATE

Sun Oct 28, 2018 6:39 am

The recording of an 8-Port Mobil Directo is exist, but IIRC the only one is the one at Milwaukee, WI, a gas-powered variant which turned electric.

Anyhow, Dennis,

1. Assuming there's no Gas MD recording around, could we see a video of your museum unit running from start, engine running, signal then shutdown? Not rotating is the another thing. (Talking about rotating, the siren supposed to turn using only one engine / motor)

2. Instead of playing a recording through the horn, why not have the siren really sound using its chopper (The part you refer as "... cylinder spinning in another hollow cylinder with holes parallel to each other to create sound...")? That'll make more sense to visitors. Noise levels? A full demonstration outdoors and/or stuffing the air intake (Lower horn), projector horn (Upper horn) (But put fabric BEFORE the smaller end) and elbow with layers of black colour fabric could do it. Some Thunderbolt 1000(T and 1003) owners stuff the horn to minimize sound output during test runs.
A Muslim Malaysian, a siren & aviation enthusiast, and gamer.

Mini Mobil Directo Project
Sirens in Malaysia Thread

User avatar
Siren_Dude
Registered User
Registered User
Posts: 623
Joined: Mon Apr 13, 2009 5:06 pm
Location: Toronto, ON Canada

Re: New guy first post /UPDATE

Sun Oct 28, 2018 4:18 pm

Great to see this siren being restored!
Your Canadian Siren Expert!
https://www.youtube.com/c/ColdWarCanada

User avatar
LukeH
Registered User
Registered User
Posts: 695
Joined: Wed Mar 20, 2013 4:43 pm
Real Name: Luke
Location: Mid Michigan

Re: New guy first post /UPDATE

Sun Oct 28, 2018 4:20 pm

I would love to see a full power run of this siren.
Resident Historian
Denver Siren Expert
Michigan

User avatar
Snowcube
Registered User
Registered User
Posts: 553
Joined: Wed Aug 17, 2016 3:46 pm
Real Name: Sam
YouTube Username: Snowcube
Discord: lumex
Location: Between 90° and 100°W

Re: New guy first post /UPDATE

Sun Oct 28, 2018 7:37 pm

This is the post I have been waiting for for years. Great to see that more progress has been made on it. Was it originally designed to spin at 1725 RPM? That would make it an octave lower and considerably quieter.
I have an unhealthy obsession with mini sirens.
Thingiverse page

User avatar
Jared H
Registered User
Registered User
Posts: 432
Joined: Sat Dec 05, 2009 11:04 pm
YouTube Username: The Siren Seekers
Discord: shodowhater#1003
Location: Dallas TX

Re: New guy first post /UPDATE

Mon Oct 29, 2018 7:37 am

Zarlog wrote:
Sun Oct 28, 2018 7:37 pm
This is the post I have been waiting for for years. Great to see that more progress has been made on it. Was it originally designed to spin at 1725 RPM? That would make it an octave lower and considerably quieter.
In this instance, the motor only drives the rotation mechanism, not the chopper - that’s driven by the “gasoline” engine. The engine should run at around ~3500 rpm, if I recall correctly
------------------------------
Apparently the chat room is haunted... -VASirens 2015
Friendly Neighborhood Thunderboltologist, if such a thing exists.

Return to “Main Outdoor Warning Sirens Board”

Who is online

Users browsing this forum: Ahrefs [Bot], Bing [Bot], Google [Bot] and 40 guests