1/35 scale auto repair shop

[TRAINS1941]

Dallas

Beautiful work!!

Jerry

[Malachi Constant]

Thanks all!  Couple simple (literally) details to add, then the second fan will be ready to paint and assemble ... meanwhile, almost forgot another photo I used to check and make sure the size of the plug looked okay. 

The nice thing about civilian modeling, maybe also the difficult thing, is how everyone can immediately recognize the details.  Military modeling requires specialized knowledge of the subject matter, but everyone knows an electrical appliance requires a plug.   I think the kick for the viewer is in the instant recognition of something familiar which you don't expect to find in miniature.  Like the plug on the end of the cable.  Nice job as usual, Dallas.

Thanks ... hoping to include enough of the "mundane" and often-overlooked details of the real world to give the scenes some extra depth and maybe a sense of familiarity ... and some other unexpected items that will (hopefully) make the viewer want to visit or "investigate" the place a little more ...

Cheers,
Dallas

[finescalerr]

An outstanding detail. And Dave's insightful comment about "civilian" modeling makes me wonder why there is no specific category for it. Or is there? -- Russ

[Junior]

Sorry Dallas your´e too late - it´s already plugged in with a vintage twisted cable. Seriously I´m not sure it´s worth bothering with but thanks a lot for your help. The outlet measures 0,8 x 1,8 m.m.

Anders 

[Philip Smith]

 

[Malachi Constant]

Second fan is ready for paint ... grille loosely placed for photo on right ...

Anders -- That's really tiny!  Hard to tell exactly how it looks because of the blurry photo.  Might be worthwhile to set the camera on a tripod or at least a rag or something underneath it to stabilize and allow a steadier photo and/or better focus.

Cheers,
Dallas

[Junior]

Second fan is ready for paint ... grille loosely placed for photo on right ...

Anders -- That's really tiny!  Hard to tell exactly how it looks because of the blurry photo.  Might be worthwhile to set the camera on a tripod or at least a rag or something underneath it to stabilize and allow a steadier photo and/or better focus.

Cheers,
Dallas

Dallas, it´s extremely tiny - one would need a macro lens. Super COOL fan should look even better when painted.

Anders

[DaKra]

I'm just glad this thing is a fan and not a heater.  Then it would say Krakow Hot Air.      But seriously, that's another one of those why-didn't-I-think-of-that little gems you keep coming up with.
Dave         

[Malachi Constant]

I'm just glad this thing is a fan and not a heater.  Then it would say Krakow Hot Air.      But seriously, that's another one of those why-didn't-I-think-of-that little gems you keep coming up with.
Dave         

Ah-ha -- that's the answer!  I'm planning to use one of the other fan grilles to make an electric heater that hangs up in the corner of the shop ... almost had an aneurysm at the prospect of laying out individual letters to spell "Krakow Electro Furnace" ... but "Krakow Hot Air" is direct and to the point. 

1/35 scale heaters:  Royal Model makes some really nice looking radiators (#585) and Verlinden has an assortment of coal stoves (#2575) with a couple there that might work ... but I'm a bit pressed for floor space in my relatively small shop.  (There are also a couple different makers of oil drum heaters out there too ... Tamiya and somebody else makes 'em.)

Krakow Hot Air:  Photo above shows the radiator casting from a Verlinden M2 Halftrack Engine kit that I got to scavenge for parts to lay around the shop and fill the parts bins ... have a couple more sets of Dave's fan parts on hand, and the grille just happens to fit over the fan on this piece ... so I'll rework the casting a bit to make some variation of wall/ceiling mounted heater sized in between the two "prototype" pix.  Have to play around with design on that one a bit before I actually get going on it ...

Cheers,
Dallas

[jacq01]

Dallas,

is the housing of the second photo fitting over the diameter of the verlinden fan in the first photo ? 
If not, the fan will be hard pushed to turn 

very nice work sofar. Lots of tips for my next project, .......... no no no, not a Krakow workshop 

Jacq

[MT Hopper]

Just a quick question. Having seen the switch, Dallas, are you considering the nano motor now?


27 July 2003
Physicists Build Nano Motor
by Kate Melville

Only 15 years after University of California, Berkeley, engineers built the first micro-scale motor, a UC Berkeley physicist has created the first nano-scale motor - a gold rotor on a nanotube shaft that could ride on the back of a virus.

"It's the smallest synthetic motor that's ever been made," said Alex Zettl, professor of physics at UC Berkeley and faculty scientist at Lawrence Berkeley National Laboratory. "Nature is still a little bit ahead of us - there are biological motors that are equal or slightly smaller in size - but we are catching up." Zettl and his research group report their feat in the current issue of Nature.

The electrostatic motors represent a significant step foward in nanotechnology, and prove that nanotubes and other nanostructures several hundred times smaller than the diameter of a human hair can be manipulated and assembled into true devices.

Zettl and other scientists had previously made transistors from nanotubes, but this device is different, he said.

"It's the first device where you can put external wires on it and have something rotating, something you can control," he said. "We are pushing a lot of different technologies to the edge."

Such motors could have numerous uses, Zettl said. Because the rotor can be positioned at any angle, the motor could be used in optical circuits to redirect light, a process called optical switching. The rotor could be rapidly flipped back and forth to create a microwave oscillator, or the spinning rotor could be used to mix liquids in microfluidic devices.

The motor is about 500 nanometers across, 300 times smaller than the diameter of a human hair. While the part that rotates, the rotor, is between 100 and 300 nanometers long, the carbon nanotube shaft to which it is attached is only a few atoms across, perhaps 5-10 nanometers thick.

The motor has highlighted some unexpected difficulties. Measuring the motor's speed, for example, can only be accomplished crudely. The team's scanning electron microscope (SEM) can take pictures every 33 milliseconds and no faster, so they can't tell whether the rotor spins or flips faster than 30 times per second.

"We assume you could go much, much faster than that, probably to microwave frequencies," Zettl said. "There's no way we can detect that right now, but in principle the motor should be able to run that fast."

Microwave frequencies, common in communication networks, are above a billion cycles per second, in the gigahertz frequency range.



The motor's shaft is a multiwalled nanotube, that is, it consists of nested nanotubes much like the layers of a leek. Annealed both to the rotor and fixed anchors, the rigid nanotube allows the rotor to move only about 20 degrees. However, the team was able to break the outer wall of the nested nanotubes to allow the outer tube and attached rotor to freely spin around the inner tubes as a nearly frictionless bearing.

To build the motor, Zettl and his team made a slew of multiwalled nanotubes in an electric arc and deposited them on the flat silicon oxide surface of a silicon wafer. They then identified the best from the pile with an atomic force microscope, a device capable of picking up single atoms.

A gold rotor, nanotube anchors and opposing stators were then simultaneously patterned around the chosen nanotubes using electron beam lithography. A third stator was already buried under the silicon oxide surface. The rotor was annealed to the nanotubes and then the surface selectively etched to provide sufficient clearance for the rotor.

When the stators were charged with up to 50 volts of direct current, the gold rotor deflected up to 20 degrees, which was visible in the SEM. With alternating voltage, the rotor rocked back and forth, acting as a torsional oscillator. Such an oscillator, probably capable of microwave frequency oscillations from hundreds of megahertz to gigahertz, could be useful in many types of devices - in particular, communications devices such as cell phones or computers.

With a strong electrical jolt to the stators, the team was able to jerk the rotor and break the outer wall of the nested nanotubes, allowing the rotor to spin freely on the nested nanotube bearings. Zettl had made similar bearings several years ago, but this was the first time he had put them to use.

"The real breakthrough came a couple of years ago, when we discovered a method for peeling shells off multiwalled nanotubes and grabbing the core with a homemade nano-manipulator operating inside a transmission electron microscope (TEM)," Zettl said. "We showed that you could pull out the cores and they really did slide, they really did behave as a bearing. That technological leap allowed us to go full bore on the motor and really have confidence we could make it in the laboratory."

Interestingly, the rotor does not continue spinning for long once the electricity is turned off. It is so small that it has little inertia, so any tiny electric charges remaining on the device after it's turned off tend to stop the rotor immediately.

"The nanoworld is weird - different things dominate," Zettl said. "Gravity plays no role whatsoever and inertial effects are basically nonexistent because things are just so small, so that little things like residual electric fields can play a dominant role. It's counter intuitive."

Zettl expects to be able to reduce the size even further, perhaps by a factor of five. For the moment, though, he and his team are trying to make basic quantum measurements, such as the conductance through the nanotubes and the amount of friction in the bearings.

"There are many very fundamental questions we are trying to answer," he said. "The flip side is, we've got this incredibly neat little motor that's smaller than any other electric motor - let's try to integrate it into some larger architecture where people are making microelectromechanical devices or nanoelectromechnical devices. People will build on this."
Cheers from the Heart of North America
Will

[finescalerr]

Try to be more careful with your cutting and pasting. A link would be preferable to a complete repost. And I had to edit out a lot of garbage that transferred from the website.

If possible, go back and replace the text in this post with a link to the page where it appears; it's slightly off topic anyway.

Thanks,

Russ

[Malachi Constant]

Feedback invited:  Here's a shot after the preliminary painting on the second fan.  Looking at the larger copy, I kinda feel like it needs something on that center circle -- a brass star maybe?  (Have a little star that would fit nicely) 

Looking at the smaller copy, I'm not as sure if it needs anything else there.  This one will get the cord wrapped around it with the little plug on the front side.

Your thoughts are welcome ... and, yes, I know the grille is crooked ... it's just loosely propped in place for the moment! 

Thanks!
Dallas

[finescalerr]

It's strictly a matter of taste. A lot of fans have no medallion in the center. I think it looks fine right now. -- Russ

[MT Hopper]

Try to be more careful with your cutting and pasting. A link would be preferable to a complete repost. And I had to edit out a lot of garbage that transferred from the website.

If possible, go back and replace the text in this post with a link to the page where it appears; it's slightly off topic anyway.

Thanks,

Russ

Sorry Russ. I'll stand in the corner now.
Will