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Valhalla Cutlery Custom Dr. Roger Carbon Fiber S30V Hand Ground by Alan Harvey Balisong Butterfly Knife

SKU: Valhalla-CARBON FIBER-150
Stock: 1

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The Dr. Roger Balisong Butterfly Knife

100% Made In the USA

Hand Made by Americans Using Only Materials from the USA.

It’s Time To Give People What They Want.

Knowing Your History Is Key.

Valhalla Cutlery Spared Nothing & the Result was PURE QUALITY.


It starts with Blades & Handles being water jetted by Great Lakes Water Jet in Granger, Indiana.

Then Getting Custom Knife Maker Alan Harvey to Come to Colorado to meet me at Valhalla Cutlery.

Blades are all Custom Hand Ground by Alan Harvey.

The Blades are all Heat Treated & Cryo Treated by Peters’ Heat Treat in Meadville, Pennsylvania.

Peters’ Heat Treat brings the S30V to a Rockwell of 61.

Solid Aerospace Carbon Fiber Handles were Designed & Custom Hand Made by Alan Harvey.

The Latch is made from Titanium.

The Spacers are Carbon Fiber Hand Made by Alan Harvey.

The Hardware is Heat Treated Stainless Steel with Torx Body Screws.

The Pivots are Heat Treated Stainless Steel with Titanium Bushing and Allen Head Pivot Screws

The Hardware is Precision Swiss Screw Machined by Swiss-O-Matic in Montrose, Colorado.

Why Did I use S30V?

It is American Made Steel for One Thing.

CPM S30V is a martensitic powder made stainless steel which was developed by Dick Barber of Crucible Materials Corporation in collaboration with knifemaker Chris Reeve as a knifemaking steel due to its wear and corrosion resistance.

Its chemistry promotes the formation and even distribution of vanadium carbides which are harder and more effective at cutting than chromium carbides.

In addition, vanadium carbides give the steel a very refined grain which further contributes to the sharpness and toughness of its edge.

Its composition is as follows: Carbon 1.45%, Chromium 14.00%, Vanadium 4.00%, Molybdenum 2.00%.

Knifemakers prefer using CPM S30V because its composition makes it easy to consistently heat treat as well as easier to grind although the carbides wear down the grinder belts.

According to Custom Knifemakers, knife users prefer S30V because it provides a strong blade with a maintainable edge due to the Vanadium carbides.

Why did I use Carbon Fiber Handles?

Who is Dr. Roger

Carbon Fiber - Model Name "Carbon Fiber"

In 1958, Roger Bacon created high-performance carbon fibers at the Union Carbide Parma Technical Center, now GrafTech International Holdings, Inc., located outside of Cleveland, Ohio. 

Modern carbon fiber was born in 1958 from the efforts of Dr. Roger Bacon, scientist at the Union Carbide Parma Technical Center in suburban Cleveland, Ohio.

The initial goal was to produce a reinforcement for molded plastic components on missiles. These early carbon fibers were produced by essentially charring strands of rayon until they carbonized. This method proved inefficient, however, as the resulting product contained only 20% carbon and possessed low strength and rigidity. The early 1960s saw carbon fiber made by a process utilizing polyacrylonitrile – an inorganic oxide – that yielded a fiber strand containing 55% carbon and much higher tensile strength. Then, in the 1970s, carbon fiber began to be produced from petroleum pitch from oil processing. This raised the carbon content to 85% and afforded great flexural strength. However, compression strength proved to be compromised and the method was soon widely abandoned. Today, about 90% of all carbon fiber is made from polyacrylonitrile and the remaining 10% is made from rayon and petroleum pitch.

Dr. Roger Breakthrough:

?The modern era of carbon fibers began in 1956, when Union Carbide opened its Parma Technical Center just outside Cleveland. The complex was one of the major laboratories of Union Carbide’s basic research program, modeled after the university-style corporate labs that became popular in the late 40s and 50s. They gathered young, bright scientists from a variety of backgrounds and let them loose on their favorite projects, giving them an extraordinary degree of autonomy.??With a freshly minted Ph.D. in physics, Roger Bacon joined the Parma staff in 1956. “I got into carbon arc work, studying the melting of graphite under high temperature and pressures,” Bacon recalls. “I took on the job of trying to determine the triple point of graphite. That’s where the liquid, solid, and gas are all in thermal equilibrium.” The equipment was akin to the early carbon arc streetlamps, only operating at much higher pressures. Small amounts of vaporized carbon would travel across the arc and then deposit as liquid. As Bacon decreased the pressure in the arc, he noticed that the carbon would go straight from the vapor phase to the solid phase, forming a stalagmite-like deposit on the lower electrode. “I would examine these deposits, and when I broke one open to look at the structure, I found all these whiskers,” he says. “They were imbedded like straws in brick. They were up to an inch long, and they had amazing properties. They were only a tenth of the diameter of a human hair, but you could bend them and kink them and they weren’t brittle. They were long filaments of perfect graphite.”??The year was 1958, and Bacon had demonstrated the first high performance carbon fibers. In fibrous forms, carbon and graphite are the strongest and stiffest materials for their weight that have ever been produced. Bacon demonstrated fibers with a tensile strength of 20 Gigapascals (GPa) and Young’s modulus of 700 GPa. Tensile strength measures the amount of force with which a fiber can be pulled before it breaks; Young’s modulus is a measure of a material’s stiffness, or its ability to resist elongation under load. For comparison, steel commonly has a tensile strength of 1-2 GPa and Young’s modulus of 200 GPa.??Carbon fibers are polymers of graphite, a pure form of carbon where the atoms are arranged in big sheets of hexagonal rings that look like chicken wire. Bacon’s graphite whiskers were sheets of graphite rolled into scrolls, with the graphite sheets continuous over the entire length of the filament.??“After studying the heck out of these things, I finally published a paper in the Journal of Applied Physics in 1960,” Bacon says. The paper has since become a milestone, partially because some have claimed that Bacon may have been the first person to produce carbon nanotubes — hollow cylinders of graphite with diameters on the order of single molecules. Their incredible properties have made nanotubes one of the hottest areas of research in recent years, promising to revolutionize just about every area of science. Sumio Iijima published a paper in 1991 that is often regarded as the first discovery of carbon nanotubes; it reported on a method that produced both tubes and scrolls. The process is similar to Bacon’s, suggesting that he too may have prepared nanotubes along with his whiskers, although he didn’t know it at the time. “I may have made nanotubes, but I didn’t discover them,” he says.?? By producing his high strength and high modulus whiskers, Bacon had demonstrated experimentally something that theoreticians had proposed long ago. But the fibers were still just a laboratory phenomenon, not a practical development. “I estimated the cost of what it took to make them, and it was $10 million per pound,” he says. To tap their full potential, manufacturers needed a cheap and efficient way to produce the fibers. Much of the research in the ensuing decades was dedicated to exactly that.

The Dr. Roger has Aerospace Grade Solid Carbon Fiber That Are Super Thick.


Overall Length:  9 Inches
Closed Length: 5 Inces
Blade Length: 4 Inches
Blade: S30v Stainless Steel
Blade Sharpening:  Alan Harvey
Blade Rockwell:  61 RC Blade Hardness
Heat Treat:  Peters’ Heat Treat
Aerospace Grade Carbon Fiber
Latch & Spacers:  Carbon Fiber
Hardware:  Heat Treated Stainless Steel
Handle Screws:  Torx

Pivots:  Stainless Steel with Titanium Bushings and Allen Head Screws
Handle Designs:  Alan Harvey

Weight:  3.2 ounces / 90 grams

Comes with a Leather Pouch with Plush Gray Fleece Lining.

Absolute Best One of 5 Made Because I Kept It

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