Продолжительность: 16:52
Опубликовано: 4 нояб. 2019 г.

26 июл. 2016 г. · Paul uses his engineering skills to design and test his backyard roller coasters until he can prove they are reasonably safe to ride and operate.

I built this PVC roller coaster in my backyard in early 2012. Here is my website: BackyardCoasters, showing pictures and videos of this and other coasters I ...

Продолжительность: 11:31
Опубликовано: 17 мая 2023 г.

Nearly anyone can build a backyard roller coaster. Maximize safety, minimumize science/math. Learn how in our course today. Make your friends jealous.

Продолжительность: 5:40
Опубликовано: 28 мар. 2021 г.

Продолжительность: 38:25
Опубликовано: 10 авг. 2024 г.

30 окт. 2014 г. · Bury your posts Dig post holes every 1.5 metres along the route. "Each should be about a third as deep as the height of the post and 25cm in ...

Продолжительность: 16:52
Опубликовано: 1 февр. 2021 г.

Продолжительность: 17:53
Опубликовано: 23 июн. 2024 г.