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THE WORLD’S only wooden supercar, known as the "Splinter”, is a high-performance sports car that is estimated to be 90% wood. Fuelled by a lifelong desire to design and build his own car and inspired by a WWII airplane called the de Havilland Mosquito, designer and builder, Joe Harmon, from Mooresville, North Carolina, spent roughly nine years working on the Splinter with the help of his team. The Splinter began as a graduate school project at North Carolina State University and has continued since. Joe told R.Rides: “I’ve wanted to design and build my own car for my whole life. And we thought building it out of material like wood would present an interesting challenge that might make us do some out of the box things and it would make it a little bit more of a scholastic endeavour.” Joe said that the goal was to use wood in the construction of the car in every possible application - wood is our only naturally renewable building material, it is biodegradable and takes a small amount of energy to produce. Also, according to Joe, wood has a better strength-to-weight ratio than steel and aluminium. Every wooden part of the Splinter is made from composite construction. Each wheel consists of over 275 individual pieces. The wheel centres are made from rotary-cut oak veneer, covered by a walnut sunburst on the outside face and a cherry sunburst on the inside face. The Splinter's engine is a 7.0L small-block V8. The chassis is built almost entirely of wood composites, the body is made from woven strips of cherry veneer with a balsa core. Even though the car is not comfortable and may be impractical, Joe said that the goal in creating this car was to explore new ideas and perceptions of wood. He said: “The car was built as a design and build exercise to kind of show people what's possible and try to figure out for ourselves what we thought was possible.”

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Motor
Transcript
00:00I've wanted to design and build my own car for my whole life, and we thought building
00:07it out of material like wood would present an interesting challenge.
00:11The world's only wooden supercar.
00:24Just a ton of work, a lot of blood, sweat and tears went into it.
00:27Obviously a lot of sandpaper as well.
00:31I'm Joe Harmon, I am the designer and builder of the world's only wooden supercar.
00:40I've wanted to design and build my own car for my whole life, and we thought building
00:45it out of material like wood would present an interesting challenge.
00:54Wood is our only naturally renewable, totally biodegradable building material.
00:59It has a better strength to weight ratio than steel and aluminum.
01:03And it's just a beautiful material that's a lot of fun to work with.
01:09I think there are roughly 20 different species of wood in the car.
01:12We try to stick to North American hardwoods.
01:14From an engineering standpoint, we all consider it to be interchangeable based on their density
01:18and strength.
01:20Walnut, cherry, maple, birch, hickory, ash.
01:25Most of the chassis is birch and maple.
01:30Wheels are walnut.
01:32The rest is a mixed bag.
01:36So interior-wise, all wood steering wheel.
01:38There's no metal in that steering wheel anywhere whatsoever.
01:41It's nothing but wooden glue.
01:44A shaft that you see coming through the middle is the gear shift.
01:48The transmission is behind the engine in this car, and the shift linkage goes over the top
01:51of the engine.
01:54The wheels were a ton of work.
01:55They're the most complicated part.
01:58Wood's very strong, but it's also soft, so when you come to these hard points of metal,
02:02you need to be able to spread that load out over a larger area.
02:10The Splinter was built over a nine-year period of time.
02:14When I was in graduate school, I was lucky enough to where my dad would pay for me to
02:17eat and go to school and live, so I didn't have any other responsibilities other than
02:21to work on this car.
02:22It's a ton of work.
02:24Pain, suffering, and sanding.
02:28As far as I can remember, the tires are the only completely off-the-shelf piece of this
02:32car.
02:34I knew it would be a ton of work.
02:35I get asked the, how many hours did this take question a lot.
02:39I tell people 20,000 hours.
02:41It was very slow, very time-intensive process.
02:44Thinking, how did I get myself into all this?
02:47It ends up pulling everybody that's close to you into a project like this.
02:51I lived through the 10 years of building it.
02:54That was quite an experience.
02:56It's still completely relevant today and looks totally different from anything else I've
03:01ever seen.
03:03It was a lot of blood, sweat, and tears, for sure.
03:06Mostly tears on my part.
03:12It has a seven-liter small block V8.
03:14We think it makes about 650 horsepower.
03:17It has a six-speed manual transmission.
03:18Airbag suspension at all four corners so we can adjust the height.
03:22It's a very, very low vehicle and we have to get it on and off of trailers a lot, so
03:25being able to pick it up and down helps.
03:29It's hot, noisy, uncomfortable.
03:35You can't see out of the back of it.
03:37You can barely see out of the front of it.
03:39You're in a really, really low driving position.
03:42That's kind of part of what makes it raw and makes it exciting.
03:45It's not exactly the most practical vehicle in the world.
03:49It's not very good as a grocery getter.
03:59The fastest I've been in the vehicle is probably 30 miles an hour.
04:03I'm sure it has a top speed.
04:04I have no idea what it is.
04:06With the weight and the aerodynamics and the power that it makes, you know, maybe the engine
04:13could push this thing to 200 miles an hour.
04:15I don't know.
04:17I feel fairly certain that it will never happen, but it's probably theoretically possible.
04:22The car was really built as a building and engineering exercise to show people that you
04:26could do it.
04:28Heat is a concern.
04:30What'll happen is if this car gets too hot, it'll start letting go and the panels will
04:33get droopy and they'll fall apart.
04:36Every vehicle can catch on fire fairly easily.
04:38Just so happens with this one, there'll be less left over at the end if it does catch on fire.
04:52When I look back on it, I think about all the good times I had.
04:55Coolest thing about the Splinter for me was getting to go through this process and realize
04:58that I've got the absolute best friends and family that anybody could ever ask for.
05:04How many Splinters did I actually get during the build?
05:06How many Splinters did I actually get during the build?
05:08I lost track.
05:10I got my fair share for a lifetime's worth.

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