Unico's SRP Calculator satisfies the need for simple well analysis. In many situations, however, this precision is unnecessary, and often it greatly exceeds what can be measured at the well site. They are capable of analysis that correlates to actual field measurements with amazing precision. These PC-based analysis programs generally include an extensive database of pumping units and rod-string components. This publication set the standard for analyzing rod pumps until recently, when personal computer calculation programs, such as Theta Enterprises' Rodstar and others, became available. Their results eventually led to the publication of Recommended Practice for Design Calculations for Sucker Rod Pumping Systems (RP 11L) in 1988 by the American Petroleum Institute (API). In 1954, a group of users and manufacturers undertook a study of sucker-rod pumping systems. The popularity of rod-pump systems has lead to a variety of methods for analyzing their performance. As a result, numerous calculations are required to optimize the effectiveness of these types of systems. Sucker-rod pumping systems involve complex dynamic relationships between production rates and stresses at various points within the unit.
#Theta rodstar free
The SRP Calculator is available on-line free of charge and provides a quick, easy analysis for many systems. Unico has developed a convenient design tool for analyzing sucker-rod pumping (SRP) system performance. SPECIAL EDITION: New Sucker-Rod Pumping System Design Calculator Provides Free, Convenient Analysis On-Line This striking Lancia should prove an excellent touring machine and one that will stand it from the crowd.Oil and Gas Automation Solutions Issue #8 Sporting roadsters are difficult to find in larger engine cars of this era. After several successful Peking To Paris runs there is a now a sizable contingent of these cars in the event a true testament to the ruggedness and great performance of these cars. The Lancia Theta reputation has grown in recent years as they have become a model of robust reliability. A factory electric starter makes starting the car a simple affair and lighting is all period electric units. Known for their excellent road manors this Lancia delivers with crisp well balanced cornering and excellent brakes. The five-liter motor propels this machine with ease and benefits from a four-speed transmission with a tall fourth gear. A few years back a fresh second-engine was fitted to the car and the original and assorted spares accompany the car. The wonderful dash and instrument cluster are all the high-quality original castings. The cosmetics look to have been done in the 1960s and have aged to give the car a pleasing uniform look.
The Lancia has resided in a small collection for many decades and has been well maintained and used frequently but sparingly. Many nice original details that may have been lost in restoration like the lovely original floor boards are present. A largely original car that has seen continued maintenance and improvement without ever being fully taken down and restored. An appropriate body for the spirited Theta chassis. This lovely Lancia Theta where striking original roadster coachwork by Hayes and Miller. Only 25 are believed to survive, few of which retain their original coachwork like this example. The last chassis was delivered in 1919, by which time almost 1,700 had been made.
Several Holbrook examples were known to made and this one by another New York body builder Hayes and Miller. To make the cars somewhat more affordable Lancia delivered the cars as chassis and they were typically bodied by coachbuilders in the New York area. Built in two different wheelbase lengths (3,100mm and 3,378mm) the Theta was capable of carrying generously proportioned coachwork and despite an enormous price tag it was a big hit in the USA. Ever the innovator, Vincenzo Lancia specified a built-in electrical system for the Theta that included an electric starter (the first of its kind in Europe). In 1913 Lancia introduced the 35hp Theta, which was powered by a 4,940cc four-cylinder sidevalve engine producing 70bhp, an output good enough for a top speed of around 120km/h (75mph) depending on coachwork. Introduced in 1907, the first Lancia car showed an independence of thought and defiance of convention that would remain associated with the marque well into the modern era. One of the most gifted automobile engineers of all time, Vincenzo Lancia founded his own company in 1906, having previously been FIAT's chief test driver. *Desirable and sporting roadster coachwork
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