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-   -   3d printed Bailey bridge (https://www.rcuniverse.com/forum/rc-tanks-369/11688606-3d-printed-bailey-bridge.html)

Pah co chu puk 03-30-2021 07:04 PM

Originally Posted by Crius (Post 12670945)
That looks really good, let me know when the 1/6 scale version is ready. Bwahahahaha

Yeah? I don't usually ask personal questions on this forum, but how big is it? (your printer build plate) Mine is 9 inches (my printer build plate) and this design uses the whole build plate to print some of the parts. I even need to print some diagonally so I can print from corner to corner to get enough length. This design would rock in 1/6 scale. If you can make it happen, I want to see it.

I milled out 180 or so wooden pieces for the bridge road deck today. I think wood is the way to go. It took me and my buddy 3 hours to mill all the scale 2x12 lumber, and it takes 3 hours to 3d print one piece of the scale lumber. Factor in the beer drinking and story telling time, and milling the wood is a big time saver. I also think it looks cooler and it seems stronger.


Michal_Kaczorowski 03-31-2021 12:34 AM

This looks awesome! Where do you got the truck? It's also 3D printed?

Pah co chu puk 03-31-2021 03:34 AM

Yes. The CCKW truck and the Ben Hur trailer are both 3d printed. The truck is RC.

Tanque 03-31-2021 04:40 AM

Extremely cool! I've always liked pontoon/ bailey bridges.

Have you guys ever seen the "Flotation Bridge" and Bailey bridge training kits the US Army had made up years ago?
I have many parts of one of the Flotation Bridge training kits. They've become pricey if you find a nice one and most sellers
don't have complete nor manuals for their use. I believe they were closer to 1/8 scale but I've never checked to be certain.

British Training Kits

Training Bridge sets

Pah co chu puk 03-31-2021 06:03 AM

WOW! That British model is amazing. It would be cool to see it in person.

I'm shooting for a more humble version of a model like that. Mine will also stack the truss panel box beams vertically, and the columns to break up the free span can be done. I have enough wood planks milled out now to make 12 feet of road deck for the bridge. That's a bridge 190 scale feet long. Or (2) 90 foot long bridges.

Pah co chu puk 04-01-2021 08:59 AM

5 sections done now. 37 3/4" of road deck. It took the 40 lb. load test, slight sagging, but it held for 10 minutes just fine.


RichJohnson 04-01-2021 10:07 AM

That is amazing work man. I love it. I wish I had a need for one so I could influence you to make me one lol. That is so impressive.

RC_BobM 04-02-2021 08:38 AM

Super cool! Very nice job! Everyone needs a Bridge Too Far!

TXtanker 04-08-2021 05:50 PM

Having gotten to drive an actual M4A1 Sherman across a bailey bridge many times since 2011 that is one perfect example of of one!!

TXtanker 04-08-2021 05:53 PM


Pah co chu puk 04-08-2021 06:34 PM

Originally Posted by TXtanker (Post 12672315)
Having gotten to drive an actual M4A1 Sherman across a bailey bridge many times since 2011 that is one perfect example of of one!!

WOW! Lucky you, that sounds fun.

Thanks for posting those pictures. I just completed the ramps, and it looks like I got the curb a bit wrong, but otherwise they look a lot like your pictures.


totolitoto 04-12-2021 03:32 AM

Beautiful work !!!!!:eek:

Pah co chu puk 04-13-2021 08:07 AM

Thank you!

6 truss sections long now. That's 60 scale feet. I did a load test, with 40 lbs. at the mid span. No problem.

Some specs.
6 truss sections long. (60 scale feet)
43 1/2-inch free span.
45-inch road deck without ramps.
60-inch road deck with ramps.
15 inches wide outside to outside.
10-inch-wide road deck. (wider than true scale so my Abrams can use the bridge too)
Ramp angles are adjustable for terrain.

Pah co chu puk 05-28-2021 04:51 AM

I deployed the bridge at Tankland for a real world test.

Pah co chu puk 05-28-2021 07:09 AM

Here is a colorized version of the movie for those of you who enjoy the nuances of Olive Drab. The bridge is painted Rustoilum Army Green.

Panzerpaul 05-28-2021 07:31 AM

You never cease to amaze me Greg. If/when you get over here, pls bring a section of the bridge so we can drool. Great job!!!

Rex Ross 05-28-2021 07:50 AM

I wish I had built that !!!

Ex_Pat_Tanker 05-28-2021 08:05 AM

I wish I had Greg's playground to put one up in :(

Will01Capri 05-28-2021 08:27 AM

Looks totally amazing. I love it

Pah co chu puk 05-28-2021 11:44 AM

Thanks guys. It was fun to finally get to set it up outside and play with it. I'm happy with how well it performed.


RichJohnson 05-28-2021 01:19 PM

Are you running a river of gasoline underneath so you can light it on fire and film a movie?

RC_BobM 05-28-2021 01:55 PM

Love it! Please sell the .STL (at least to your fans!). Nice bridge, vehicles and play ground!

Pah co chu puk 05-28-2021 02:33 PM

Originally Posted by RichJohnson (Post 12679717)
Are you running a river of gasoline underneath so you can light it on fire and film a movie?

No, it's just muddy water.

I had to haul the water up to the property using one of those 200 gallon pick up truck tanks just so the "river" could have some water in it. The property Tankland is on has no well, and it's miles from any town up an ungraded dirt road in a high desert pinon forest. The logistics of moving a bridge, some vehicles, and water, deep into the back country for a movie shoot, was huge. Projecting power at a distance, takes lots of resources, even with 1/16th scale armor.

Crius 05-29-2021 07:46 AM

Now I want to see you load it all into trucks and move it to the next site where it's needed. Bwahahahaha :p

Seriously, though, have you got sound in that ambulance yet?

Pah co chu puk 05-29-2021 09:30 AM

Originally Posted by Crius (Post 12679795)
Now I want to see you load it all into trucks and move it to the next site where it's needed. Bwahahahaha :p

Seriously, though, have you got sound in that ambulance yet?

I'm already looking for another site to set up the bridge. I want to set it up across a real flowing stream, not just a muddy spot I can make at Tankland. We still have a bunch of snow on the mountains, so it may be a few weeks before I can get up there to film tanks and trucks crossing the bridge. By then I may have a couple more sections printed out so the bridge can be longer.

I have a sound set up for the ambulance, but I didn't use it that day filming the bridge. I've tried it out in the CCKW and the ambulance. It has a great start up sound, but then it sounds kind of lame during the driving. The sound volume is too low.

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