Georgetown Branch - 2010

More Engraved Bricks

2011-09-18T18:55:00.000-04:00

I was able to get some decent bricks engraved today. What I did was grind a 4 sided point (like a nail head) onto a 1/8" steel rod. Then I used it as a drag engraver, another words the machine was not spinning the bit, it just scribed the plastic.

Below is a picture of the test.

CNC Tunnel Update

2011-09-17T21:16:00.000-04:00

After working out the details of how to cut and assemble the parts for the tunnel I focused on the engraving operation needed for the bricks. So far I have not been able to engrave a fine enough line in the plastic to simulate the brick wall.

If I can't work out the engraving I will have to cut the parts from brick wall sheets but then I have a problem with the soldier coarse details above the arch.

CNC on the GTB

2011-09-12T23:23:00.000-04:00

I know it has been a while since I have updated or even worked on the railroad but I have a good excuse!

Over the summer I converted one of my old mill/drills to CNC and I have really been having a blast making parts and learning the software for programing and control of the machine. If you are interested I have posted a few video's on YouTube. Like this one

So tonight I started drawing up the Dalecarlia tunnel entrance in the cad and cam software. I have generated a simulation of the tunnel opening (pictured below) and it says over 2 hours to mill.

I have no idea how this will turn out . I still need to tweak a few things in the software before I give it a test cut but if it works out Ben will get on for his railroad also!

The bricks/mortor joints will have to be cut with an engraving tool. I am not sure how I can engrave the motor joints in the recessed area's without the body of the tool hitting the sides. I am also not sure how to approch the letters. I could engrave the area and then place the letters on top of skip the engraving and carve the leters into the portal as shown.

The engraving bit it a 1/4" V shape and it will only be cutting .001 or .0015 inches deep.

I will report back soon with the results.

Staging on the Main

2011-03-27T21:55:00.001-04:00

I imagine most of you run trains on your main line but I will be staging them on mine!

If you have been following along you will notice I changed my staging once again. I wasn't satisfied with the swing bridge I built a few pages back, it was cumbersome and inconvenient. So back to back to the idea of using part of the hallway for a narrow staging shelf.

Instead of some arbitrary yard ladder for staging I decided to use the double track main line as it was laid out in the mid 50's. Closest to the hallway is the East bound main, in the middle is the West Bound main, and finally closets to the wall is the west bound siding.

Trains originating from Eckington Yard in Washington D.C. will be staged on the west bound main or the west bound siding. They will proceed up the west bound main as if they were coming from Eckington. Once past the cross over the train will back through the crossover onto the east bound main until it clears the branch siding switch. At this point the train will proceed west down the Georgetown Branch.

Only one train originated from the east. An early form of a unit train would arrive from Baltimore with a string of tank cars bound for the oil distributor near River Road. The train was an F unit and it would return light to Baltimore once the string of cars where delivered. This train will be staged on the east bound main next to the branch siding.

Since the main line is almost at eye level I decided to go with ME code 83 and I raised it approx. 3/16" higher then the code 70 on the branch tracks. The far end of the main line will be hidden behind a small hill at the end of the branch interchange tracks.

As you can see all the tracks are in place and wired. I ran out of of Masonite so I could not finish the upper and lower valance, that is on the todo list. I also need to paint the wall behind the staging track and add turnout controls.

Well that's it for now, feel free to post your thoughts.

More Track Work

2011-02-27T21:05:00.000-05:00

Just a quick update. I was able to install all the tracks, turnout controls, and wiring for the New Yard area of Georgetown.

Georgetown Trackwork

2011-02-24T19:51:00.001-05:00

Yes I finally have some track working in Georgetown! The main line and run around track are operational as is the brewery siding (the track Emily is park on).

I deviated from the my track plan in a few locations as I laid everything out...

The first siding you come to as you enter Georgetown is Lone Star Cement. On the prototype this was a facing point turnout. On the plan I drew it was a trailing point turnout. By using a #7.5 curved turnout I was able to go back to facing point and stay true to the prototype.

Same story with the brewery siding, I had drawn it in as a trailing point turnout to save space but when I relocated the Lone Star Cement siding I was able to go back and fit in the facing point per the prototype.

In my excitement to lay track I completely forgot about the Wilkins Rodgers siding so that needs to be cut in soon. That will also be a facing point siding that goes to a background building along the backdrop.

Below is the basic layout for the "New Yard" area. The 2 tracks closest to the water (right) had a traveling crane over that spanned the two tracks with space in between for trucks. The next two tracks (middle) are team tracks placed 1.75" apart with space on both sides for trucks. Then main line tracks #1 and #2 (left).
Emily (far left) sites on the brewery siding.

I decided to leave out one other team track in the yard so the area was not over crowded and I would have space for vehicles.

Now back to building turnouts so I can get this track installed!!

More Turnout Tools

2011-02-20T22:02:00.001-05:00

I spent most of today fabricating a couple of turnout tools. The first tool is a frog rail grinding jig.

You start by laying in two pre cut sections of rail and bolt the jig together. Then grind the rails on a disk sander.

Next remove the rails, flip them over in the jig, clamp, then solder.

I removed relieved the area under the rails were you solder them together so the heat from the soldering iron would not be absorbed by the jig

The next tool I fabricated was a point rail grinding jig. This clamp holds the rails at 2 degrees so I can grind them to shape on the disk sander. Again just drop in a pair of pre cut rails and bolt on the top.

Pictured below are the first pair of parts I made and they turned out great.

To Handlay or Not in Georgetown

2011-02-13T21:25:00.002-05:00

After using the Micro Engineering code 70 turnouts and track I can honestly say I would never hand lay track again! The turnouts look great and operate flawlessly. At 17.00 each I can't see spending the time to hand lay track unless you need something other then #6's.

For now I still plan on using/reusing my hand laid turnouts in Georgetown. Almost all the tracks in Georgetown are buried in cement (plaster) so only the PC ties will be required and minute track details won't be missed.

With that in mind my previous hand laid turnouts needed refreshing and some extra PC ties add for track support so I built an assembly jig out of 3/4" MDF using a #6 ME turnout as a template. I milled 1/8" slots to the proper depth to hold the ties in place while assembling the turnout. The jig can accommodate both left and right hand turnouts.

Half a Tunnel ???

2011-01-30T21:24:00.000-05:00

Something that has been bothering me for a while was the proxsimity of the Dalecarlia tunnel to the River Road sidings. On the prototype the tunnel was about a 2 miles from River road. On my model it is about 2 feet. That would place your train in the tunnel while switching the oil storage sidings in River Road.

So instead of trying to force fit the tunnel into this space lets see what it looks like if I eliminate the River Road side of the tunnel entrance all together. First lets cut off the Dalcarlia side of the tunnel face and save it. Then add a view block made from 3/4" foam. Lets use some scrap Masonite to temporarily form the front fascia. OK what do you think?

By doing this I gained about 16 inches on the River Road side of the tunnel. The opening in the view block can easily be hidden with trees and a few buildinds can be placed between the edge of the layout and the tracks. This should give the illusion of the train disappearing down the tree lined right of way as it leaves River Road, just as the prototype did.

Below is the Dalecarlia Side of the view block with the Dalcarlia Tunnel. I will have room to place a building flat against the foam divider to represent the rear of the Army Map building. That and a long winding set of wooden stairs down to a loading platform just outside the tunnel will set the scene.

Now when you sit in front of the railroad you really feel the separation between the two area's. Of course the valance will need to be remade but I think this is the best approach for now.

Dalecarlia Water Treatment Sidings

2011-01-30T20:19:00.004-05:00

Today I completed the tracks and roughed in the scenery for the Dalecarlia water treatment plant. The treatment plant employed an overhead delivery system that carried materials several hundred yards away from the tracks. All of the overhead piping and supports will be scratch built. A row of chemical storage tanks will be placed next to the tank cars with a chain link fence around the delivery track.

Below I have the lower valance removed to finish up the wiring. In the background the tracks curve behind a small hill to hide the entrance onto the bridge across the windows. Sorry for the grainy pictures. The new camera broke so I am back to using the iPhone.

Lighting & New Deck Complete

2011-01-16T20:30:00.002-05:00

With the final upper deck plan in place I decided to buckle down and complete the lighting on the railroad. This pictures shows the effect of the lights with the room lights turned off. Near the two bricks on the upper level you can see the fold away bridge in its stored position.

This photo shows the edge of the new deck (foreground left) I built for the junction. The notch is for the bridge. On the upper deck in the background is Bethesda. Below on the lower deck is Dalecarlia Tunnel. In the background you can see the left side of the removable bridges in front of the windows.

Below is the new deck for the junction with the bridge in place. The bricks are holding the foam in place while the glue dries. Under the new deck is Landey Lane with Briggs Filtration siding (right) the Hot Shop's warehouse siding (middle) and the warehouse siding (left). This area needs a lot more work.

Below I am trying out the macro function on the new camera.

Below is the hide away bridge in its operational position. Beyond the bridge near the bricks will be the E.C. Keys sidings. In the background you can see that I have turned the corner and extended the layout up to the edge of the windows.

Switching some covered hoppers in Bethesda. Look, no brackets on the underside of the upper deck !!

The Bridge

2011-01-11T22:14:00.000-05:00

I started tinkering with bridge designs and put this together from parts I had on hand. I shot a short iPhone video to explain how it works.

Revised Upper Level

2011-01-09T21:09:00.001-05:00

After many mock-ups it became apparent that I was going to have a reach in problem over part of the lower level, the area that protrudes out like a triangle. The only way I could see to simplify the area above the triangle was to go ahead with the node under. Staging will be moved to the very top level above Bethesda. E.C. Keys sidings will be placed as shown on the plan to keep operators on each level separated.

The node under will be a swing out bridge section that will fold into the front edge of the railroad when not in use. To hid the track when stored I have planned a removable Styrofoam section of scenery that will cover the bridge track when stored and be used as a filler when the bridge is deployed.

The new area will have the Interchange and team track next to the B&O main line that will sit in the background. Cars for the interchange can be brought onto the layout via cassette as shown in the plan. Cassette's will be stored under the lower level.

I will continue the helix upwards to the third level above Bethesda. Staged trains will be visible with small mirrors placed in the corner of the ceiling. I have decided to push all trains toward Georgetown as the prototype did so no run around in staging will be required.

I have already built the new shelf for the interchange and I am working out the bridge detail. I will post pictures in a couple of days.

Tracks in Georgetown

2010-12-16T16:01:00.002-05:00

I started the track layout in Georgetown and everything looks good. All of the "New Yard" will be hand laid on PC ties and then buried in cement (plaster) just like the prototype.

This next picture shows the layout of the "Old Yard". From left to right the tracks will consist of Smoot Sand and Gravel, then a pair of team tracks, a single warehouse track and on the far right a double track to the coal heating plant. The last track on the right will be the end of the main line.

Between the "New Yard" and "Old Yard" will be a model of the abandon coal fired street car power plant. This structure will visually devide the two yards in Georgetown.

Scan of the original B&O track map in Georgetown.

Removable Bridges

2010-12-16T00:02:00.002-05:00

I built the two removable bridges over the weekend. They are made from 3/4" plywood and 1/8" masonite and are semi permanent. The only time they would need to be removed would be to do maintenance on the windows.

The lower bridge also carries the bus wires for the layout power across the windows.

Population NOT Zero

2010-12-12T02:13:00.000-05:00

Quick Picture Update

2010-12-05T11:25:00.000-05:00

Bethesda Tracks - Part 2

2010-11-28T22:06:00.005-05:00

Ben stopped by last week and we went over the plan for Bethesda. Ben has done extensive research on the branch line and his web site is loaded with great photo's and information. Stop over and have a look at http://sluggyjunx.com/rr/gb/

We agreed that the mock-up I had done in Bethesda looked good so this weekend I proceeded to install all the tracks, turnouts and wiring. Everything works well and Bethesda will be able to handle a lot of freight traffic in the near future.

This image is looking towards Georgetown. You can see two industry sidings, the team track beyond those and way in the back the coal trestle track. The runaround will handle a 5'-6" long train.

This picture is looking back toward the Junction. In the background the 2 bricks mark the location were Wisconsin Ave will cross over the tracks.

Trolley Bridge - Part 2

2010-11-21T00:08:00.002-05:00

Just a quick update tonight. I worked on the basic scenery around the bridge over the trolley tracks. Not sure if the bridge color is correct, if it is not I made it removable for easy maintenance so I can repaint if needed.

River Road - Part 3

2010-11-18T20:17:00.001-05:00

The sea of pink foam was driving me crazy so pulled out some latex paint and gave the area a basic texturing of ground foam and a few shrubs. The Briggs Filtration building flat looks quite nice. The climb up Landy Lane was well worth the extra construction time.

For the roads I am using a mix of styrene and plaster for Lany Lane. River Road. is built up out of styrene and features curb and sidewalks.

Before the paint and texture went down the track was air brushed with grimy black followed by a touch of rust. Once I have the roads painted and glued in place I plan on blasting the tracks up to River Road. Details and other structures to be added over time.

Tracks in Bethesda

2010-11-14T17:48:00.002-05:00

As I started to lay out the tracks my first thought was that I had allocated way to much space to Bethesda.
After progressing through four different track arrangement it became apparent that my original track plan was going to work the best.

At the intersection of Reed Street and Bethesda Ave. looking toward Georgetown.

At the Bradley Boulevard Bridge looking toward Georgetown Junction. The brick in the picture will be Malloney Cement. The Boxcar and Gondola will be the team track and the box cars in the background will be the Frito Lay Plant and a few other industries. Not pictured is the coal trestle near the bridge over Bradley Boulevard.

Map of Bethesda

Dalecarlia Tunnel

2010-11-14T17:25:00.000-05:00

Last night I roughed in the Dalecarlia tunnel. The 300 foot long tunnel ran unde MacArthur Boulevard and the Washington Aqueduct.

I left the sides pretty steep for now until I have time to build the tunnel portals. The top 2 layers of foam are removable for track maintenance. For now the foam is painted black inside. The bricks are holding everything in place while the glue dries.

Trolley Bridge - Part 1

2010-11-08T21:40:00.002-05:00

Cutting the foam and roughing in the bridge over the trolley tracks. At the fascia I left a gap for the wires to run under foam boards. Brown latex caulk is used as an adhesive.

Dalecarlia Water Treatment Sidings

2010-11-07T21:46:00.001-05:00

Before I can complete the west end of River road I need to work out the placement of the Dalecarlia Tunnel, the trolley tracks that ran under the branch, and the Dalecarlia Water Treatment sidings.

Below is a mock up of the siding looking West toward Goergetown.

Below is a prototype picture looking east bound toward Georgetown Junction.

River Road - Part 2

2010-10-24T15:37:00.001-04:00

I stayed up late last night getting more tracks laid at River Road. I was able to to finish the track work on the East side of River Road (G.T. Junction is to the East & Georgetown is to the West). I still need to add the Washington Petroleum siding on the West side of River road.

Looking East - from left to right: Auto Body Siding, Hot Shop's Siding, Main Line, Briggs Filtration Siding.

Looking West you can see the Briggs Fitration building Flat on a small hill. The building in the for ground with the box car next to it is a small industry that was across the track form the Auto Body warehouse that will be on the right side of the box car.

River Road - Part 1

2010-10-17T23:59:00.001-04:00

What a day... Our well pump burned up this morning and I spent most of the day replacing it. I am not sure why I had energy left to work on the railroad but here I am.

River Road had a few different industries over the years but the track that ran up Landey Lane seemed a constant. Landey Lane started at the intersection with River Road and climbed uphill ending at the last industrial building. The siding was about 900 feet in length, and served Briggs Filtration according to a 1946 Sanborn Map. I was able to model about 280 scale feet of siding that rises above the main line approx 5/8".

In this first picture you can see the location of River Road and the intersection with Landey Lane. The street and track climbs uphill and levels out at the warehouse doors.

This pictures is from the warehouse looking back toward River Road. In the background, on the south side of River Road you can see the beginnings of a siding for Washington Petroleum Products. The other turnout near the rail cutter will branch off into 2 spurs. One will serve a Hot Shops Restaurant Supplies and feature a traveling crane. the other will serve a few small buildings and a contractors yard.

Next up is paint that pink landscape!!!

Turnout Control

2010-10-04T15:43:00.000-04:00

What do you think of this manual turnout control switch mounted into the scenery at the front edge of the layout?

My last layout used DPDT slide switches mounted from below with control rods run to the front fascia.

This time I have no room under the layout and the fascia needs to be easily removed to access wiring. Rods protruding from the front fascia would make removal very difficult. I decided to try mounting the DPDT switch near the front edge of the layout with a control rod run through the foam to the turnout.

LED's could be mounted behind the fascia and plastic reflectors could carry the light through to the front of
the fascia allowing easy removal without disconnecting wires.

If fat fingers are a problem a small hole could be drilled in the top of the switch and a uncoupling pick used to throw it.

Starting The Track Base

2010-09-26T21:48:00.000-04:00

Now that the framing is complete I can turn my attention to actually modeling the railroad. First up is the foam that will fill in around the support brackets and support the track and scenery.

I decided to try a less expensive route for the foam base. Instead of 4 inches of expanded polystyrene (blue or pink foam) I choose to start with 4 inches of the less expensive expanded polystyrene (white beaded foam).

To get the 4 inches I am using two layers of 2 inch foam boards. The fist layer is cut 3 inches narrower then the depth of the plywood base to provide a wire chase at the front of the railroad and glued to the plywood with liquid nails for projects.

The second layer is cut to the full depth and glued in place over over the first layer.

Once those layers are in I top it off with 3/4 inch expanded polystyrene foam and weigh everything down until the glue dries.

With all the layers in place the foam is approximately 1/2" higher then the front valance. I plan on tapering the edge of the foam down to the facia board with a hot wire cutter as the scenery progresses.

Cork roadbed will be placed on top of the foam if needed after I do some sound testing. Another option is to hot wire the road bed out of the 3/4" foam after the track is installed.

Revised Upper Level Plan

2010-09-26T20:54:00.000-04:00

The size of the upper right deck (above Georgetown) is fixed but the track plan is still evolving. At the moment I am considering using the entire upper deck to model Georgetown Junction. I have tried to model this area before in a smaller space and it has never looked right.

It looks like a long dull section of straight tracks on paper, but what if it gave me the opportunity to include main line details like signals, well groomed main line track and a place to showcase some heavy motive power even if it just sits idle?

Another though... This arrangement would give the operators a chance to block cars heading to the staging tracks. The staging track closest to the backdrop could also serve as Silver Spring Yard and add a bit of interest to the switching duties of the trains heading for Georgetown.

A few mock up track layouts once the foam is in place will help me decide.

What Looks Good on Paper

2010-09-26T20:19:00.000-04:00

What looks good on paper doesn't always look good in real life. I was and still am very pleased with the decks and helix I built a few months ago on the left side wall, however the upper deck on the right side wall has been bugging me to know end. It just didn't look right and I figured out why... Depth!

With the right side decks are 6" deeper then the left side decks. The overhanging upper deck completely cut off the view of the lower deck where Georgetown Yard will be located. After looking at it for a few months I decided to cut back the depth of the upper deck to 16 inches. I will loose some model space on this level but it will open up the lower deck to extra light and easier operation of the runaround tracks in the back of Georgetown Yard.

I have updated the track plan to reflect the changes made in deck size and will post them up next. I also started work on the foam base near the helix. More updates to come.

Bracket Detail

2010-06-17T19:55:00.000-04:00

A few people have asked for a clearer picture of the shelf bracket. This shows the U shaped shelf bracket with a 10/24 nut captured inside and the bolt installed.

Shelf Construction

2010-05-01T22:18:00.000-04:00

One of my pet peeves about double deck railroading was the exposed support systems on the upper deck. When I decided to go multiple deck I devised a plan to hide all support brackets from sight. The way this works by placing the shelf brackets above the shelf. The front of the the shelf board is supported by 10/24" all thread rod. The rear of the shelf board is screwed to the 2x4 that is attached to the wall. In the next few photo's you can see I have achieved my goal and the results are fantastic!

More Construction

2010-05-01T22:09:00.000-04:00

Thank you for all your positive comments on the Blog! Helix construction is complete and it turned out great. I hate to hide it away because the kids love to watch the train climb the grade.

Helix Construction

2010-04-07T21:13:00.000-04:00

I have started the helix construction after fixing up the wall I talked about in my previous post. Recycled lumber from the first GTB model railroad was used to cut the helix sections.

I won't go into the construction detail for the helix since the internet is full of idea's and techniques on this subject.

Picture of the helix base.

Picture of the first couple of turns.

Track Plan Tweaking

2010-03-24T15:58:00.000-04:00

After opening one side of the wall that divides the laundry room and the train room I located several plumbing pipes that would make it very difficult to build the helix as shown in the original drawings... back to the drawing board.

In order to move the helix fully into the train room I had to reduce its size to 24". Then I had to rearrange the layout of the lower deck area around river road.

Lower deck

Upper deck

Hardware and Framing

2010-03-20T16:44:00.001-04:00

Today I spent some time finding a way to support this multiple deck railroad without having to see the unsightly support structure. After several hours I think I have hit on something.

I started be cutting a short section of double shelf standard to 4.25" with a single screw hole near the top. I placed an 18.5" bracket onto this short standard and gave it the old pull test! It turned out that it was extremely strong.

Next I tinkered with some drawings and came up with the idea below.

This gives the upper deck a clean underside I plan on running the wiring under the removable front valance or close to the front near the CFL lights. I built a test section with 2 brackets 32" apart and it is very sturdy.

This is what the underside of the upper deck will look like, very clean. The backdrop will be painted on
the existing drywall.

More Track Plan Detail

2010-03-13T13:13:00.001-05:00

I added a little more detail to the Georgetown Yard area of the plan. I will have to reverse two of the industry tracks from the original, Lone Star Cement and the Brewery. I will use the stone arch bridge that carried the canal over the tracks as a scenery break before the lift out section in front of the window.

Georgetown Branch - 2010

2010-03-11T20:27:00.000-05:00

Good news for my Georgetown Branch fans. I have decided to continue modeling the branch line by constructing a double deck model railroad.

The model will be approx. 100 feet in length and feature most of the major area's along the branch line. This will be a true point to point layout with no provision for continuous running. The Georgetown waterfront will now be modeled in its proper prospective, not mirrored as in the previous layout.

At this point I have a basic plan started in CAD. The room is 23' x 12 feet.

Lower level will include: Georgetown, Dalecarlia water treatment plant, Dalecarlia tunnel, and River Road.

Upper level will include: Bethesda, E.C. Keys Siding, Georgetown Junction, and Staging.

Photo's in Georgetown

2005-12-06T14:15:00.000-05:00

A Few pictures from Georgetown

River Road Map

2005-12-06T14:12:00.001-05:00

The River Road area of Bethesda is the Next stop on my railroad. Below is a Sanborn map of the area.

Georgetown Track Map

2005-12-06T14:01:00.000-05:00

Pictured is a blueprint of Georgetown Yard. Located at the end of the branch it has become the focal point on my model railroad.

I was fortunate enough to obtain a copy of the entire branch line from the the B&O Historical Society.

My intent is to model Georgetown Yard as if you were standing at the rivers edge with Georgetown as my backdrop.

After evaluating the original plan and my available space I decided to built a mirror image of the Georgetown track plan. This fit my available space perfectly.

Bethesda Track Map

2005-12-06T13:54:00.000-05:00

Track map of Bethesda. Unfortunately I do not have room to model this town. The industries listed for Bethesda include the Frito Bakery (frito's), Maloney Concrete (ready mix concrete), Columbia Specialty Company (fuel and building materials), and a Chemical Manufacturer.

Tunnel Drawing

2005-12-06T13:52:00.000-05:00

This is a drawing of the Dalecarlia Tunnel portals. You will notice the name on the drawing is that of the Metropolitan & Southern R.R. This was one of the three railroads created to construct the branch in its early years.

Track Schematic

2005-12-06T13:50:00.000-05:00

Pictured is a copy of the original schematic track map of the Georgetown Branch.

Research For the Model Railroad

2004-12-06T14:11:00.001-05:00

My research began with a old ADC map of Washington D.C. that has a surprising amount of detail concerning the rail lines in and around Washington D.C. The map had all of the branch line and sidings at the time it was printed.
From their it was of to the internet where I found the home of the Baltimore and Ohio Railroad Historical Society. The Society hosts a Yahoo Group and the members are eager to answer your questions on a multitude of B&O related questions. Members have help me acquired track maps, drawings, and blueprints of the branch line as well as contributed a wealth of personal experiences and memories. I would like to take this opportunity to thank everyone on the group for their help.
After several months of inquires about the branch the society decided to publish a story of the Georgetown Branch in their quarterly magazine "The Sentinel". Much to my surprise the article filled almost the entire volume. It is an exceptional piece and contains numerous photo's and maps. If you wish to purchase a copy they can be found at the B&O Historical Society Company Store along with other B&O related items.
One the cover a Fairbanks Morse H10-44, Emerges from under the Air Rights Building in Bethesda, Maryland on its way to Georgetown in March 1971.
(Harold Buckley Jr. photograph)