Friday, January 24, 2020

The Chrysler 300F, Defining Dual-Purpose Power in the Early 1960s

1960 Chrysler 300F image from

Primary care physician Christopher Stubbs, M.D., serves as medical director of the Audubon and Exira EMS service in Iowa. An off-road vehicle enthusiast, Dr. Christopher Stubbs also has a passion for classic cars and automotive history.

One of the landmark vehicles that defined the 1950s and 1960s was the Chrysler 300 series. Introduced in 1955, the vehicle capably combined exclusivity and power, giving the road driver unmatched capabilities under the hood.

The 1960 Chrysler 300F was a major step forward for the series and represented a final milestone for legendary auto designer Virgil Exner, who led a team of engineers in creating the manufacturer’s first-ever unibody design vehicle. This streamlined vehicle offered a number of advantages, including a lighter and more rigid frame that expanded the car’s interior space.

At the same time, the 300F housed a 375 horsepower “Golden Lion” engine, then in its second year of production. Offering an innovative cross-ram induction system that powered dual four-barrel Carter carburetors, the engine delivered 495 pound-feet of torque.

The result was a dual purpose vehicle that needed relatively little modification to be race-ready, but also offered around-town luxury. The futuristic interior was a defining feature, with the floating electroluminescent AstraDome instrument cluster paired with leather bucket seats. With fewer than 1,000 two-door hardtop Chrysler 300Fs manufactured, and only 248 convertible 300Fs produced in 1960, the car is a sought-after rarity among collectors.

Thursday, November 7, 2019

Understanding Cryptocurrency and Blockchain

A medical director of an emergency medical service in Audubon and Exira, Iowa, Christopher Francis Stubbs, M.D., previously served as a primary care physician in a rural county hospital. Outside of work, Dr. Christopher F. Stubbs’s varied interests include cryptocurrency.

Unlike the US dollar and other nations' currencies, cryptocurrency is a digital medium of exchange that exists only in the network and has no physical form. Encryption procedures are used to regulate the production of monetary units and to validate fund transfers. Bitcoin is a well-known cryptocurrency. One cannot discuss cryptocurrency without including blockchain, as it is the technology the enables the creation of cryptocurrency and its electronic storage.

A blockchain is a ledger of all transactions recorded in a network of computers that act as servers for one another, enabling shared access of information. A central server is not needed, which means a central clearing authority is no longer required for participants to verify transactions. The verified transactions are stored in what is known as blocks and added to the chain of blocks or blockchain.

The technology makes it virtually impossible to alter verified information, as the alteration must occur in all servers and affects all the blocks in a chain. Its transparency, security, and cost reduction potential (there is no need for a middle man or central clearing operation), makes blockchain technology extremely appealing for various applications aside from a medium of exchange.