User avatar
Sentry88
Registered User
Registered User
Posts: 211
Joined: Mon Dec 05, 2022 2:10 pm
Location: Midwest

Re: Restoring one of Milwaukee's Gasoline Mobil Directos!

Sat Feb 11, 2023 11:07 pm

Looks Great!
Proud owner of nothing!
Hello, fellow siren enthusiasts. I am losing interest, but will be back on the board from time to time.

User avatar
Eclipse DDS
Registered User
Registered User
Posts: 176
Joined: Mon Oct 03, 2022 7:59 pm
Real Name: Employee 205664
YouTube Username: Civil Defence Fox
Location: Cumbria, England
Contact: YouTube

Re: Restoring one of Milwaukee's Gasoline Mobil Directos!

Sun Feb 12, 2023 11:13 am

This looks great! The Regal Red really contrasts nicely with the snow!
A British siren enthusiast. Previously lived at the furthest point from any sirens before co-discovering one very close to where he is located. Also features a great discomfort referring to themselves in third-person.

User avatar
dat612freakoftoday
Probation
Probation
Posts: 113
Joined: Mon Feb 07, 2022 12:47 am
Real Name: Seth shepherd
Location: Toledo, Ohio

Re: Restoring one of Milwaukee's Gasoline Mobil Directos!

Sun Feb 12, 2023 2:26 pm

jerrylovessirens wrote:
Sat Feb 11, 2023 12:15 am
dat612freakoftoday wrote:
Fri Feb 10, 2023 7:50 pm
Just wondering, Where was this originally located?
We are pretty sure it came off of the old Greede Foundry in Milwaukee.
1312 S 1st St, Milwaukee, WI 53204

Building is long demolished. Here is a street view from 2007 before it was demolished

Also included is a very grainy vintage photo of the roof. Might be older than the 1950s. I'm going to try to see if I can find a better photo.

Just think, our Mobil Directo would have been in that pile of rubble and scrap iron if it were not for Joe!
Well you are lucky you saved it before it was turned to scrap

User avatar
jerrylovessirens
Registered User
Registered User
Posts: 679
Joined: Mon May 15, 2006 12:08 pm
Location: Campbellsport, Wisconsin

Re: Restoring one of Milwaukee's Gasoline Mobil Directos!

Thu Feb 16, 2023 12:19 am

Got the repaired and painted battery box installed. It sure looks great!

Got the first coat of paint on the air cleaner. I have a feeling I may have to wet sand once on this.
Attachments
20230215_174343.jpg
20230215_174343.jpg (1.09 MiB) Viewed 6897 times
20230215_174401.jpg
20230215_174401.jpg (1.89 MiB) Viewed 6897 times
Jerry

Owner of former Wisconsin Dells/Lyndon Station Decot Model 12 (10/15 port)

Owner of the world's only fully operational Mobil Directo BN52G

flatlandsparky
Registered User
Registered User
Posts: 406
Joined: Mon Dec 30, 2013 5:22 am
Location: Colorado

Re: Restoring one of Milwaukee's Gasoline Mobil Directos!

Thu Feb 16, 2023 12:34 am

This project has been coming along nicely.

User avatar
jerrylovessirens
Registered User
Registered User
Posts: 679
Joined: Mon May 15, 2006 12:08 pm
Location: Campbellsport, Wisconsin

Re: Restoring one of Milwaukee's Gasoline Mobil Directos!

Sat Feb 18, 2023 6:54 pm

Got the painted aircleaner loosely installed. Got the United decal installed. Looks good

While I was inspecting the oil bath cup, I noticed daylight showing through! A couple really small rust spots must have blasted through. Mixed up a small daub of JB kwik weld and spread it on. Not perfect, but it works!

Started to fabricate the throttle solenoid mount. It's coming along nicely. I'm designing it with plenty of adjustment so we can get the thottle pull just right!

I did a Saturday test of the siren. We are getting really really close to dialing it in. I can only run it at full speed for about 10-15 seconds as a courtesy to my neighbors.
Attachments
20230218_122230.jpg
20230218_122230.jpg (1.82 MiB) Viewed 6795 times
20230218_122247.jpg
20230218_122247.jpg (2.01 MiB) Viewed 6795 times
20230218_122656.jpg
20230218_122656.jpg (1.43 MiB) Viewed 6795 times
Jerry

Owner of former Wisconsin Dells/Lyndon Station Decot Model 12 (10/15 port)

Owner of the world's only fully operational Mobil Directo BN52G

User avatar
jerrylovessirens
Registered User
Registered User
Posts: 679
Joined: Mon May 15, 2006 12:08 pm
Location: Campbellsport, Wisconsin

Re: Restoring one of Milwaukee's Gasoline Mobil Directos!

Mon Feb 27, 2023 12:31 pm

We are getting so close to completion I can taste it!

First, I found that there was no way to successfully silence the siren with the projector on. There was too much air exchange from inside the donut through the gap in the intake, that no amount of pillows or cardboard could seal it off. So off went the projector. I then duct taped a exact fit piece of cardboard over the stator. This effectively silenced the siren to a point where the VF4 is louder than the siren itself.

I was then able to tune the governor linkage to give a steady RPM at close to 3000rpm. There is still a little bit of surging going on, but it is not terribly noticeable in the tone of the siren itself. One disadvantage of the Stromberg carb compared to the later Zenith, is that it does not have a high speed adjustment for the jet. It is a fixed orifice.

I will leave the projector off until the throttle solenoid is installed and adjusted properly.

I also got the air cleaner fully assembled and filled with oil. It sure looks great.

The right house cover has also been test fitted. I will be making up the stencils soon for MOBIL DIRECTO SIREN, as all the early Milwaukee ones had.
Attachments
20230227_061057.jpg
20230227_061057.jpg (1.44 MiB) Viewed 6649 times
20230227_060352.jpg
20230227_060352.jpg (1.39 MiB) Viewed 6649 times
Jerry

Owner of former Wisconsin Dells/Lyndon Station Decot Model 12 (10/15 port)

Owner of the world's only fully operational Mobil Directo BN52G

Ohio_Warning_Sirens
Registered User
Registered User
Posts: 53
Joined: Fri May 11, 2018 8:27 pm
Real Name: Aaron Aliff Jr
YouTube Username: Ohio Outdoor Warning Sirens
Discord: Ohio Outdoor Warning Sirens
Location: Cuyahoga County, Ohio
Contact: YouTube

Re: Restoring one of Milwaukee's Gasoline Mobil Directos!

Mon Feb 27, 2023 2:33 pm

Looks good Jerry! Also, when the governor linkage is fully tuned up, will it run at the full rpm steadily without any noticeable pitch changes?
Owner of a Model D and some random junk.
Currently looking to own a siren so hit me up if you're selling one

User avatar
Synther
Global Moderator
Global Moderator
Posts: 1053
Joined: Fri Jul 10, 2015 5:57 am
YouTube Username: UtahSirens
Location: Utah
Contact: YouTube

Re: Restoring one of Milwaukee's Gasoline Mobil Directos!

Mon Feb 27, 2023 2:57 pm

Lots of progress, can't wait to see it with the painted text. It is important to account for the lowered air resistance during tuning, as it can result in the siren running slower than intended after the restrictions are removed. Best to shoot for 3450RPM for optimal results.
State of Utah siren map - My channel
STH-10, SD-10, 2 Model 2s

User avatar
jerrylovessirens
Registered User
Registered User
Posts: 679
Joined: Mon May 15, 2006 12:08 pm
Location: Campbellsport, Wisconsin

Re: Restoring one of Milwaukee's Gasoline Mobil Directos!

Mon Feb 27, 2023 3:14 pm

Synther wrote:
Mon Feb 27, 2023 2:57 pm
Lots of progress, can't wait to see it with the painted text. It is important to account for the lowered air resistance during tuning, as it can result in the siren running slower than intended after the restrictions are removed. Best to shoot for 3450RPM for optimal results.
The VF4 is not designed to run that fast. I spoke to the nation's premier Wisconsin service station here in Milwaukee, and the VF4 is rated at only 3000rpm for intermittent duty. Continuous duty max RPM is 2500Rpm, so we are already pushing the envelope. The Mobil Directo manual itself states a running RPM of 3000. This would give a tone of 400HZ.You will notice all electric converted 8 port Mobil Directos will run at 468hz or therabouts due to the higher speed of the 3450rpm electric motors.
Last edited by jerrylovessirens on Tue Feb 28, 2023 12:24 am, edited 1 time in total.
Jerry

Owner of former Wisconsin Dells/Lyndon Station Decot Model 12 (10/15 port)

Owner of the world's only fully operational Mobil Directo BN52G

Return to “Main Outdoor Warning Sirens Board”

Who is online

Users browsing this forum: No registered users and 37 guests