A solution to this is to make a sandwich of roller bearings; basically a self-contained stack of rings separated by bearings. It’s difficult to put into words, so hopefully this diagram will help:

This is the design currently used in my latest crane. The model is meant to be a tower crane with a luffing boom, but it is also a test bed for some new ideas that I’ve had.

I built the turntable for this years ago. I intended to use it to make a hammerhead style tower crane, but decided later to turn it into a slightly different style with a luffing boom.

The turntable uses the same roller bearing ring as used on my 4×4 offroad crane.

One year and two Brick Fiestas later, I’m still around and still building! Speaking of Brick Fiesta, I was Co-Chair this year. The event took place last week. It was a great success, and I’m still really tired!

I built a new crane for the event:

click to visit my Flickr site

It’s very similar in function to previous cranes that I’ve made. However, this uses a brand new turntable design. It’s smaller than previous designs (ie Crane Project #1) and it works well. I also designed a boom with a triangular cross section made mostly of studless beams and parts.

More details to come later! Hope you are enjoying your summer!

My host upgraded it’s PHP, and all of my blogs needed a little maintenance to make them work again. I think I’m good to go here, although a few of my other blogs still aren’t functioning properly.

On the building front, I’ve been finishing up my UP 844. I’m also finishing up a new, small project that I’ve not announced yet. It’s for the kids and it’s train related. I’ll get photos up in the coming weeks.

I’m also preparing for Brick Fiesta in Austin, Texas. It’s less than 3 weeks away!

click to view Crane Project page

I finished the project a long time ago. I just recently got around to fully dismantling the pieces.

Three of his MOCs really impressed me. The first is this great model of a Bucyrus mining shovel:

Bucyrus 495 HF
Click to view Flickr Page gallery
(image © Arjan Oude Kotte)

This one really caught my eye It’s the only other model of a Liebherr 996 that I’ve seen besides my own.

Liebherr 996 Litronic
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(image © Arjan Oude Kotte)

And finally, this model of a P&H shovel is really superb. I’ve contemplated building a MOC of this very same machine.

P&H 4100xpc
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(image © Arjan Oude Kotte)

Arjan’s work is fantastic. I think it’s definitely worth keeping track of his work!

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It’s a display of trusses with a little info card. Thanks to Matt S. for the idea

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I used the same base as my last display, except that I changed out the lettering for different colors to match our state flag.

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I wasn’t sure about putting in a little info sign. I made one for the last display I did in February. But the folks at the store assured me that the kids visiting the store will stick around a bit longer and actually read it. Cool!

The system is mapped out in detail here: www.philohome.com/pf/diagram.gif. Many, many thanks to Philo for this diagram.

Implementing this information to make a custom PF battery box is what I’ve figured out recently. I wanted to make a custom (non-LEGO) battery holder that would take 8x rechargeable AA batteries. That would give me a total of 9.6 volts (rechargeable AA batteries are typically 1.2 V per cell as compared to traditional alkaline batteries that are 1.5 V each) and essentially more and longer lasting power for my models (in comparison to using a standard LEGO battery holder that only takes 6x AA batteries).

Below is a schematic showing the set-up for a custom battery box.

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You can find off the shelf non-LEGO battery holders in a variety of sizes and capacities. For AA batteries, I’ve found holders that take 4 each and also 8. In my example below, I’ve used two 4x AA holders and wired them together in series.

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This is for my UP 844 MOC. The 4xAA holders fit snugly into a space that is 8-studs wide.

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When I first started to play around with this, I somehow misinterpreted the information and ended up wiring the batteries up like this:

do NOT do this
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DO NOT DO THIS! This will make smoke come out of the PF IR receiver box.

My PF receiver is now a pristine example of what a PF receiver should look like from the outside. Inside, it’s toast.

Click to view Flickr Page
(image © Mike Doyle)

Wow. Just wow.

My mind refused to believe this was made of LEGO until I checked out Mike’s blog (there’s a link to it on his Flickr page). The incredible amount of detail is astonishing.

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I tore down the old system of shelves back in November, which were not very sound and also not efficient with regards to storage space. I put up three new shelves directly mounted to the wall. The back of the desk’s surface serves as a fourth, bottom “shelf”.

The spacing of all the shelves was optimzed to fit my storage bins. I use the small-open-bin-type storage systems for the main storage. Storage of overflow parts (i.e. the parts that won’t fit into the small bins) go into the compartmentalized boxes (with lids) on top.

Protection of this highly-sorted bunch of parts comes in the form of hinged doors. When I’m done building for the day, I clear off the desk and shut these white doors. I still need to attach proper latches.

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“Protection” means I basically have to keep my kids from accessing these bins while I’m at work or otherwise out of the house. My 2-year old likes to get on my desk, pull bins, and dump them all over.

I also shortened the depth of my desk. It was 36″ deep, which made reaching the bins from a sitting position kind of hard (my arms aren’t THAT long). Now it’s 28″ deep and just right.

I kept the length of the desk (or width, as you look at it) the same: 8 feet.

In the past several weeks, I’ve spent a lot of time building, and I have to say all the modifications were worth it. I’m happy with the new set-up, and I think it works well for me.

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The LUG Showcase program is program offered by the LEGO retail stores, and each store has a small display case for this feature. LUGs are invited to display a creation and advertise their club. The change-out of displays happens about every month.

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This is my first time to do a display. This display will go into the case in the Houston Galleria LEGO store on February 5. It will be up until early March.