Full B9 robot construction guide index. See the updated B9 robot build overview.

Frequently Asked Questions

What is the recommended construction sequence for building a B9 robot replica? The B9 build is best approached section by section from the base up: tread section first (establishing the base and carrying all weight), then legs (establishing height and torso mounting), then torso, collar, upper body and radar section, and finally the brain and bubble dome. Internal electronics are typically installed in parallel with the final sections.

How long does it take to build a full-size B9 robot replica? A full-size B9 replica is considered a multi-year project for most builders. The timeline depends on skill level, available workshop space and tools, budget for materials, and whether community reproduction parts are used for components that would otherwise require complex mold work. Builders with existing mold making and casting skills progress faster than those developing skills during the build.

What are the major sections of a B9 robot build? The seven major sections are the tread section, leg section, torso, accordion collar, upper body and radar section, brain and bubble dome assembly, and claw assemblies. Each section is structurally complete before moving to the next, and the build progresses from the base (tread) upward to the dome.

Where is the best community resource for B9 robot construction information? The B9 Builders Club forums are the most comprehensive resource for B9 construction, accumulating decades of builder documentation including original prop dimensions, commercial part identification, season-by-season variation documentation, and member build logs with in-process photographs. WonderFest in Louisville provides annual in-person access to finished builds and experienced builders.

Further Reading from Authoritative Sources

  • B9 robot from Lost in Space — Wikipedia’s Robot (Lost in Space) article is the authoritative reference for the prop’s design, materials, and production history that the construction guides are based on.
  • Lost in Space — Wikipedia’s Lost in Space article provides authoritative series history, episode counts, and production context that inform which season’s configuration builders target.