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TOPIC: 1/72 Working Lift-Span Bridge

1/72 Working Lift-Span Bridge 3 months 3 weeks ago #91

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Designed and built servo controllers for operationg the swing-gates.




Installed the servo motors under the display table.




And while I was at it (electronics side of the project) added (direction and speed) controllers for the two DC motors (span and boat motors).


Motor shaft drifts slightly (unloaded) after switch off. This affects the sensor positions along the pulley cable systems.


Building the motor controller circuits on a single board.


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1/72 Working Lift-Span Bridge 3 months 3 weeks ago #92

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Nice work!! Do you etch your own PCBs?
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'Yea, Though I Fly Through the Valley of the Shadow of Death, I Shall Fear No Evil. For I am at 50,000 Feet and Climbing.'
RAF Liberator Squadrons

1/72 Working Lift-Span Bridge 3 months 3 weeks ago #93

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Gary wrote: Nice work!! Do you etch your own PCBs?

Yes mate

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1/72 Working Lift-Span Bridge 3 months 3 weeks ago #94

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Painted two groups of 1/72 scale figurines (pedestrians and council workers).

Cntre row: figures 3 and 4 are the same, but 4 has been altered by amputating the free arm and relocating it (my first altered figurine). Doing this opens up all sorts of possiblities. I feel like Dr Frankenstein.

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Last Edit: by Sparky.

1/72 Working Lift-Span Bridge 3 months 3 weeks ago #95

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They'll do the job fine, patience you have young Sparky.
Does your local council actually dress it's workers like that? They must feel like extras for the Wiggles lol
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'Yea, Though I Fly Through the Valley of the Shadow of Death, I Shall Fear No Evil. For I am at 50,000 Feet and Climbing.'
RAF Liberator Squadrons

1/72 Working Lift-Span Bridge 3 months 3 weeks ago #96

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First time reading this post & like others I am lost for words.
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Cheers Michael

1/72 Working Lift-Span Bridge 3 months 3 weeks ago #97

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Gary wrote: ...
Does your local council actually dress it's workers like that? They must feel like extras for the Wiggles lol

Yeah, it's high visibility clothing for working near traffic or mobile machinery. It's part of being covered by health insurance.

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1/72 Working Lift-Span Bridge 3 months 3 weeks ago #98

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Ah, yeah I see, that makes sense.
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RAF Liberator Squadrons

1/72 Working Lift-Span Bridge 3 months 3 weeks ago #99

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Wow :ohmy: very impressive work.
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Rob

Currently hacking away at:
1/48 Hobby World TA-4
1/48 Tamiya Mosquito
1/35 Asuka Firefly VC
1/24 Panel shop Dio "FINISHED"
1/24 Fujimi Datsun 240Z drop top "FINISHED"

1/72 Working Lift-Span Bridge 3 months 3 weeks ago #100

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Thank you Gary and Rob for your responses.
________________________________________
What about the boat?
The boat traverses under the bridge, up and down stream, but does not turn around to come back. To stop the appearnce of a boat reversing it needs two bow sections. A boat of symmetry - so to speak.
Bought two identical boat kits from China, which came with instruction sheets in Chinese (great help that is). Played around with an image of the boat to see what the modification will look like. Never built a model before, but I guess I'll just have to follow the pictures.


I cut in half the keels, decks, and cabin walls, and stuck similar sections together. The planks were too hard to bend and glue. I knew the glue won't hold under such stress. A planking iron was too expensive, but discovered a DIY method on the Internet. It uses a tea-candle and a tin can. It worked wonders in heating and shaping the planks to suit the hull.


Drew the waterline against each bulkhead. Planked the waterline. Then filled in between with planks.


Filleted the boat like a fish. Sanded the bottom half flat and smooth.
I had added two captains at their helm.

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1/72 Working Lift-Span Bridge 3 months 2 weeks ago #101

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1/72 Working Lift-Span Bridge 3 months 2 weeks ago #102

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Loving this. The only question is which captain goes down with the ship?
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Amateur plastic surgeon!

1/72 Working Lift-Span Bridge 3 months 2 weeks ago #103

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Sparky wrote: Thank you Gary and Rob for your responses.
________________________________________
What about the boat?
The boat traverses under the bridge, up and down stream, but does not turn around to come back. To stop the appearnce of a boat reversing it needs two bow sections. A boat of symmetry - so to speak.
Bought two identical boat kits from China, which came with instruction sheets in Chinese (great help that is). Played around with an image of the boat to see what the modification will look like. Never built a model before, but I guess I'll just have to follow the pictures.



I cut in half the keels, decks, and cabin walls, and stuck similar sections together. The planks were too hard to bend and glue. I knew the glue won't hold under such stress. A planking iron was too expensive, but discovered a DIY method on the Internet. It uses a tea-candle and a tin can. It worked wonders in heating and shaping the planks to suit the hull.


Drew the waterline against each bulkhead. Planked the waterline. Then filled in between with planks.


Filleted the boat like a fish. Sanded the bottom half flat and smooth.
I had added two captains at their helm.




Ps
I am a bit disappointed that you can't read a chinese instruction sheet ;)
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'' I could sense things were about to kick off, so I got out of there !''


Last Edit: by Maarten.

1/72 Working Lift-Span Bridge 3 months 2 weeks ago #104

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Maarten wrote: ...I am a bit disappointed that you can't read a chinese instruction sheet ;)

:( Sorry about that.

:lol:

Oh, Thanks for the huge compliment.

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Last Edit: by Sparky.

1/72 Working Lift-Span Bridge 3 months 2 weeks ago #105

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Bishop wrote: Loving this. The only question is which captain goes down with the ship?

:lol: I don't know.

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1/72 Working Lift-Span Bridge 3 months 2 weeks ago #106

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:lol:
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Amateur plastic surgeon!
Last Edit: by Bishop.

1/72 Working Lift-Span Bridge 3 months 1 week ago #107

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Cranking along there Sparky.
Looking awesome
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1/72 Working Lift-Span Bridge 3 months 1 week ago #108

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Painted four larger life-savers to look like bumper tyres. Added bits of copper wire to doors for hinges. Stained doors and cabin roofs with coloured ink and a coat of satin enamel. Added a sitting figurine with a piece of string to look as if splicing rope.



Applied some wood putty and sanded the hull smooth, which will be painted later on.
Made some small eyelets for rigging.



Made hand-railing and attached them to cabin roof.

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1/72 Working Lift-Span Bridge 3 months 1 week ago #109

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NICE!!
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Amateur plastic surgeon!

1/72 Working Lift-Span Bridge 3 months 1 week ago #110

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The boat has two sets of navigational lights. Both for up and downstream indication.


Mast light.


Discovered that the front cabin wall was too thin to block the interior lighting.
A reflective blind was made to stop the light and reflect it back into the wheelhouse.
Both sets of red-green LEDs were installed.


Stern lights, nav light hoods, and a radar antenna installed.
You can see that along one side is a set of red and green lights indicating port and starboard for up and down stream travel of boat.


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1/72 Working Lift-Span Bridge 3 months 1 week ago #111

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'' I could sense things were about to kick off, so I got out of there !''


1/72 Working Lift-Span Bridge 3 months 1 week ago #112

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This is awesome, especially all the electro mechanical stuff you're designing and incorporating into it.
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1/72 Working Lift-Span Bridge 3 months 1 week ago #113

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Thank you Maarten and Stinker for your support.
____________________________________________
Added the air vents, winches, and two figurines having a chat.


Then altered a figurine to make him look as if he has tripped over (he went for a sixer).:lol:

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1/72 Working Lift-Span Bridge 3 months 3 days ago #114

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Wow this is awesome Sparky.
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1/72 Working Lift-Span Bridge 3 months 3 days ago #115

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The boat is to snugglty fit onto a base plate, which glides over the water surface by a millimetre or so. This plate is attached to an aluminium plate going through the table top (vane). There needs to be four wires connecting between boat and electronics under the table. Decided to use a printed circuit board (pcb) to bridge across. The tracks ought not rub against the tabletop slot. So the 1.5 mm pcb will be inbedded in the 2 mm aluminium vane.









Ordered some parts, so this portion of the project is on hold for awhile.

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1/72 Working Lift-Span Bridge 3 months 3 days ago #116

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Totally different what most of us do here on the KM,electronics,metal work and woodwork ...Fantastic stuff !!
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'' I could sense things were about to kick off, so I got out of there !''


Last Edit: by Maarten.

1/72 Working Lift-Span Bridge 3 months 3 days ago #117

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What Maarten said. Really interesting to watch.
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Amateur plastic surgeon!

1/72 Working Lift-Span Bridge 3 months 2 days ago #118

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Maarten wrote: Totally different what most of us do here on the KM,electronics,metal work and woodwork ..

Thanks Maarten (and Bishop). One day I'll have to give plastics and resins a go.
_______________________________________________________________________

The boat is now completed.



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1/72 Working Lift-Span Bridge 3 months 2 days ago #119

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this is amazing Sparky totally in awe
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1/72 Working Lift-Span Bridge 3 months 3 hours ago #120

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Left hand side of the diorama is both vast and bare. It needs some attraction to bring balance to the whole.
I have a few ideas. One is to have some humourous drama happening on the bridge.
Decided to create a police scene. A tall policeman will be holding up approaching traffic from behind their broken down patrol car, as they approach the traffic lights.
Their blue car light will flash at the same time the amber traffic lights do at the start of bridge operations.



Somewhere along the riverbank will be this fisherman appearing to have caught a fish.



Really enjoyed playing Dr Frankenstein with the plastic figurines.

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