What's the biggest mast that a home/backyard builder could make?

What's the biggest mast that a home/backyard builder could make? Thank you.

 

Too little information.
Many more questions.
How big is the backyard?
What materials?
Skill level of builder?
Appearance and performance expectations?

The backyard may not be the limiting factor.

 

At least as long as the shop.

 

Sorry but you invite to jokes, no pun intended. In my workshop the longest mast I could build was, until I cut a hole in the door to the rest of the building, was 18ft. Thereafter it was 50ft.

 

I sometimes look at an arrow-straight Norfolk Pine in my front yard, that is around 15 metres, and think it would make a good mast for someone. But maybe not a suitable species.

 

Masts can be made out of all kinds of species.

 

I assume you are talking about a 'box' type hollow construction & not a solid mast.
many years ago I worked with a mast builder on a few projects.--->
wood was spruce,
air dried (about 1 year minimum)
quarter sawn
other wood types (pines, perhaps) could be used but may be heavier & affect stability.
tooling accuracy & fit is critical. good cabinet or airframe builders do the best work

 

I built a couple of Gougeon wooden wingmasts that were 60' long in a large warehouse. No special equipment was needed other than a 60' level table to save my back.

 

102.34' absolute maximum.

But why ask such an obtuse question... and then disappear?