So, Im writing a sci-fi universe, and a species in said universe is a low-population fox-like humanoid race who live on a forest-covered world. With a society that's like a summer camp and a tech level of mid-1950s Earth, minus some photovoltaic panels and lithium-based batteries; they're very rural and communal, this species also has a very basic space program, mostly to explore their solar system and scavenge for alien tech left over by a long-dead advanced civilization. This species uses wood to compensate for a lack of lightweight metals (I.E. Aluminum and titanium) for surface structures and aircraft.
But is wood a viable building material for spacecraft?
- the species has no aluminum processing, they just never figured it out
- titanium is also not used, as deposits of it are too rare on-surface and off-world infrastructure is not developed enough for full-scale extraction
- this civilization hand-makes most things based on its needs, of the 6 million individuals that exist, around 200,000 are dedicated to their small space program
- they do refine metals like steel, lead, copper, and gold, which are used in propulsion systems, fuel tanks, shielding, electronics, and parts of the craft that need to be airtight, wood is merely a structural component or used to construct cargo containers, and metal refinement is on a small scale
- they have all the infrastructure or alternates to needed infrastructure for a small space program
- The wood selected for space flight is hardwood similar to hard maple and can be reinforced by resins/tars or steel rods
- everything they make is made by the hands of specialists (as in not in big factories, in small workshops or chemistry labs) based on if someone needs the thing, the exceptions to this rule is food, water, and electricity. It's inefficient but they don't need heavy industry for their mostly simple lives.
- they all live in one city, not a concrete jungle like New York, but a large rustic settlement located near one of the planet's oceans, it's also where most production is
- we're hand-waving all logistic issues of a pre-industrial production system making post-industrial tech