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Subject: 
United Air Lines DC-3 with working props and landing gear
Newsgroups: 
lugnet.technic, lugnet.build.military, lugnet.announce.moc, lugnet.town, lugnet.loc.us.ca.sf, lugnet.org.us.baylug
Followup-To: 
lugnet.technic
Date: 
Mon, 16 Oct 2006 05:49:46 GMT
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Aircraft are difficult to taxonomize on LUGNET. This isn’t a military plane, but military fans will recognize the “gooney bird” - the military’s version of the DC-3 - so I included that. I decided to post it mainly under Technic because of the working parts, though most of the plane isn’t really Technic. I’m including Town because that’s the closest minifig theme, and while it is roughly minifig scale the minifigs can’t fit inside due to all the mechanical and structural parts. And I’m including my local and club groups. I wish we had lugnet.build.aircraft, but there is no such thing.

Anyway... the rest of this post is based on my blog article for this model:

When my father left the Navy and joined United Air Lines in the late 1950’s, he flew this plane, the DC-3.



Like my Lunar Mobile Lounge, this has been at several BayLUG meetings, and now I am finally posting about it here.

Also like that model, it is motorized. There are two motors, located in the fuselage: one which powers the propellers and the other which makes the landing gear go up and down. There is a battery box in the fuselage that powers the propellers, and a wire coming out of the entry door leading to a battery box that controls the landing gear. In both cases, a Technic axle passes through the fuselage and the base of each wing. For the props, there are bevel gears in each engine which drive the propshafts. For the landing gear, the axle is mounted directly to the mechanism. A roof panel is removable to view the mechanism inside. Here’s a video I made to illustrate how it works: YouTube QuickTime via BrickShelf.

There are other parts that move as well: the ailerons, elevators, and rudder are all freely hinged. Oh, and the wheels rotate :-) The wings and vertical tail can be removed easily for storage and transportation.

The fuselage is designed using half-stud offsets to achieve the desired shape. This means the walls are very fragile as they cannot be properly interconnected.

On the leading edge of each wing are “de-icing boots” which are made of rubber in the real plane. These are modeled using a curved brick that I got at LEGOLAND California in their “build it and buy it” area in 2003. I don’t know if they were ever part of an official LEGO set, but I never saw them anywhere else. It’s the same shape as the trans-light-blue spotlights in the Soccer sets. These “boots” are attached at an angle using plate hinges and plates, and have half-stud offsets to follow the desired wing angle.

Overall this was an interesting experiment in half-stud offsets and integrating a Technic mechanism into a realistic looking model. I learned a lot making this and hope you enjoy it.

Click the photo above to see more, or click to look on Flickr (slideshow) or on Brickshelf. And of course there’s the blog entry.



Message has 6 Replies:
  Re: United Air Lines DC-3 with working props and landing gear
 
(...) Are these 6192/30337 (URL) Peeron shows them in black in Technic sets from the late '90s and a 4+ Pirate set from a few years ago. (18 years ago, 16-Oct-06, to lugnet.technic)
  Re: United Air Lines DC-3 with working props and landing gear
 
Nice moc William. You have captured the awkward shape of the planes' nose beautifully. Great backstory too. Kind Regards, Chris. Think it, Build it, Share it. (18 years ago, 16-Oct-06, to lugnet.technic, FTX)
  Re: United Air Lines DC-3 with working props and landing gear
 
--snip-- (...) --snip-- (...) Nice aircraft. At first glance I would have said it was a bit chubby but reading that you fit a bunch of working stuff in there I would turn that around to say lovely compromise between form and function. I think your (...) (18 years ago, 16-Oct-06, to lugnet.technic, lugnet.announce.moc, FTX)
  Re: United Air Lines DC-3 with working props and landing gear
 
Nice MOC! As Chris said, you have captured the awkward shape of this plane's shape very well! (18 years ago, 16-Oct-06, to lugnet.technic, FTX)
  Re: United Air Lines DC-3 with working props and landing gear
 
(...) William, Wow, this is awesome. It's hard to capture a streamlined shape in Lego, but you've captured a DC-3, I didn't even need the name to recognize it. Thanks, George (18 years ago, 16-Oct-06, to lugnet.technic, FTX)
  Re: United Air Lines DC-3 with working props and landing gear
 
In lugnet.technic, William R. Ward wrote: SNIP Great MOC, William! I'm always impressed when art and function come together in an animated and impressive build. I really like the working ailerons and, of course, the landing gear mechanism. Good tail (...) (18 years ago, 18-Oct-06, to lugnet.technic, FTX)

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