Jujun Junaedi spends his free time in a backyard tinkering with his project, guided by instructional videos, as he dreams of flying above the snarled roads of his hometown Sukabumi.

“It’s so incredibly frustrating. You run out of petrol and it’s a waste of time,” the 42-year-old says of congestion in the city, about 110 kilometres (70 miles) south of the capital Jakarta.

“You end up being totally exasperated by the time you get to where you’re going.”

Buying parts and using scraps from his auto repair shop, Junaedi says he has spent about 30 million rupiah ($2,100) on his creation since he started building it 18 months ago.