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The Best Guide to Building a Backyard Roller Coaster

Since I was a young kid, I’ve been fascinated with roller coasters. I have build many functioning model and Lego roller coasters over the years. In fact, after a trip to Six Flags Magic Mountain, I decided to build my own!

While that attempt didn’t work well (sorry Emily), I did go on to become an engineer and know a lot more about the mechanics of roller coasters.

https://youtu.be/wxaVr74OMLE

Now that my kids are older, they are starting to share my love of roller coasters as well. So I thought, why not build one for them…..(and me) to enjoy in the yard.

I also wanted to expand this to everyone else by showing you exactly how I will be designing and constructing all aspects of the roller coaster.

And so, planning began on a backyard roller coaster named the “Black Widow” (My kids have a sudden love of spiders.)

As with most things, I stand on the shoulders of giants! There have been many other backyard roller coaster enthusiasts out there who have paved the way for me. I would like to point out Paul Gregg as a backyard roller coaster researcher who has opened the door to many non-engineers creating their own back yard roller coasters.

I wanted to share this channel playlist with you in the video link below. Enjoy!

Black Widow Roller Coaster Image Gallery

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Video-Tubing Steel Fabrication for Our Backyard Roller Coaster

Metal fabrication is unfamiliar to most of us. Fortunately it comes with cool tools that create fire and sparks!

As I begin to cut and prep tubes for welding, let me show you the steps necessary.

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Video-First Successful Rides on the “Black Widow” Roller Coaster

Well, the day has finally come! We are ready to do our first runs on the Black Widow Roller Coaster!

After running the cart with 180 lbs of load (1.5 times intended load) for three circuits on the layout, we certified the rider weight capacity to 120 lbs. More than enough for my three kiddos.

Well, let’s see if they like it…

Video-Cart Issues on Our Backyard Roller Coaster

My first attempt at a cart was a good success. Well, except for the front wheel assemblies, and the side and up wheels….

Ok, so it needs some work. See why and how to correct it.

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Video-Backyard Roller Coaster Initial Trials – They Didn’t Die

The moment we’ve all be waiting for is here. Real people riding the Black Widow from the second hill. Let’s look at those smiling faces….

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Spoiler alert; nobody died and they liked it. Now on to the first full circuit runs.

Video-Initial Drop Retracking for Our Backyard Roller Coaster

If you ain’t screwing up; you ain’t doing anything.

Believe it or not, I have a written goal of to “fail” once a day. Yep, we learn more from our failures than from our successes, so why not fail more?

This time, it was in calculating and building the proper bank in the first valley. I knew what the calculations said I should do, but didn’t do it because I thought I knew better. I believed that my dive angle would make up for the lack of bank.

Rides like Top Thrill Dragster and Viper as Six Flags Magic Mountain are evidence that at a steep enough dive, you don’t need to bank the track. Well, my drop was no where near steep enough to compensate. – Design Error

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The second error was just a lack of roller coaster design experience that I have since gained. (There is plenty more to learn, don’t worry). This was determining what radii to work with and how to support and address the actual construction of the project.

The result was 3 days of tearing up the old track and reconstructing it to a 53 degree bank angle. Enjoy!

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