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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
00:06building it out of a material like wood would present an interesting challenge.
00:10The world's only wooden supercar.
00:23Just a ton of work, a lot of blood sweat and tears went into it. Obviously a lot of
00:28sandpaper. I'm Joe Harmon, I am the designer and builder of the world's only
00:35wooden supercar. I've wanted to design and build my own car for my whole life and we
00:44thought building it out of a material like wood would present an interesting
00:48challenge. Wood is our only naturally renewable, totally biodegradable building
00:58material. It has a better strength to weight ratio than steel and aluminum and
01:03it's just a beautiful material. It's a lot of fun to work with.
01:07I think there are roughly 20 different species of wood in the car. We try to stick
01:13to North American hardwoods. From an engineering standpoint we all consider to
01:16be interchangeable based on their density and strength. Walnut, cherry, maple,
01:22birch, hickory, ash. Most of the chassis is birch and maple. Wheels are walnut. The rest
01:32isn't mixed back. So interior wise, all wood steering wheel. There's no metal in
01:39that steering wheel anywhere whatsoever. It's nothing but wooden glue.
01:43A shaft that you see coming through the middle is the gear shift. The transmission's
01:48behind the engine in this car and the shift linkage goes over the top of the
01:52engine. Wheels were a ton of work. They're the most complicated part. Wood's very
01:57strong but it's also soft so when you come to these hard points of metal you
02:02need to be able to spread that load out over a larger area.
02:08The splinter was built over a nine-year period of time. When I was in graduate
02:14school I was lucky enough to where my dad would pay for me to eat and go to school
02:17and live so I didn't have any other responsibilities other than to work on
02:21this car. It's a ton of work, pain, suffering, and sanding. As far as I can
02:28remember the tires are the only completely off-the-shelf piece of this
02:32car. I knew it would be a ton of work. I get asked the how many hours did this
02:37take question a lot. I tell people 20,000 hours. It was very slow, very time
02:42intensive process. Thinking how'd I get myself into all this. It ends up pulling
02:48everybody that's close to you into a project like this.
02:50I lived through the 10 years of building it. That was quite an experience. It's
02:56still completely relevant today and looks totally different from anything else I've
03:01ever seen. It was a lot of blood, sweat, and tears for sure. Mostly tears on my part.
03:07It has a 7-liter small block V8. We think it makes about 650 horsepower. It has a 6-speed manual transmission,
03:18airbag suspension at all four corners so we can adjust the height. It's a very, very
03:22low vehicle and we have to get it on and off of trailers a lot. So being able to
03:26pick it up and down helps. It's hot, noisy, uncomfortable.
03:33You can't see out of the back of it. You can barely see out of the front of it.
03:38You're in a really, really low driving position. That's kind of part of what makes
03:43it raw and makes it exciting. It's not exactly the most practical
03:48vehicle in the world. It's not very good as a grocery getter.
04:00The fastest I've been in the vehicle is probably 30 miles an hour. I'm sure it has a top speed.
04:05I have no idea what it is. With the weight and the aerodynamics and the power that it makes,
04:11you know, maybe the engine could push this thing to 200 miles an hour. I don't know.
04:16I feel fairly certain that it will never happen, but it's probably theoretically possible.
04:21The car was really built as a building and engineering exercise to show people that you
04:26could do it. Heat is a concern. What will happen is if this car gets too hot, it'll start letting go
04:33and the panels will get droopy and they'll fall apart. Every vehicle can catch on fire fairly easily.
04:38It just so happens with this one, there will be less left over at the end if it does catch on fire.
04:53When I look back on it, I think about all the good times I had.
04:55The coolest thing about the splinter for me was getting to go through this process and realize
04:59that I've got the absolute best friends and family that anybody could ever ask for.
05:03How many splinters did I actually get during the build? I lost track. I got my fair share for a lifetime's worth.
05:10To make it a fair share for a lifetime's worth.

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