Oldsmobile Aerotech

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Oldsmobile Aerotech
OldsAerotech.jpg
Overview
Manufacturer Oldsmobile
Also called Aerotech ST
Aerotech LT
Aurora Aerotech
Production 1987–1992
Assembly Lansing, Michigan, United States
Designer Ed Welburn (1985)[1]
Body and chassis
Class Development Prototype
Body style 1-door coupé
Layout Rear mid-engine, rear-wheel-drive
Platform March 84C CART (modified)[1]
Powertrain
Engine
Transmission 5-speed manual
Dimensions
Wheelbase 2,827 mm (111.3 in)[2]
Length 4,882 mm (192.2 in)[2]
Width 2,184 mm (86 in)[2]
Height 1,016 mm (40 in)[2]
Curb weight 726 kg (1,600 lb)[2]
Oldsmobile Aerotech engine at the R. E. Olds Transportation Museum

The Oldsmobile Aerotech was a series of experimental high-speed vehicles manufactured between 1987 and 1992 incorporating the latest in performance technology with the intention of breaking multiple automobile speed records. The first such car was driven by four-time Indy 500 winner A. J. Foyt to a world closed-course speed record of 257.123 mph (413.788 km/h) on 27 August 1987 at the 7.712-mile (12.411 km) test track near Fort Stockton Texas. Prior to this, on 26 August 1987, the car had posted a top speed over a mile of 267.88 mph (431.10 km/h).

Development[edit]

At the end of 1984, the development of Oldsmobile Quad 4 engine was complete. It was an inline-4 engine incorporating four valves-per-cylinder and dual over-head camshafts, an innovative technology used on a four cylinder engine at the time. Oldsmobile advertised the engine to be highly fuel efficient and powerful. The engine generated a maximum power output of 150 hp (112 kW) and 160 lb⋅ft (217 N⋅m) in its standard configuration, outclassing the four cylinder engines developed by German automobile manufacturers BMW and Mercedes, even rivalling with Honda's 2.5-liter V6 engine.

The engineers behind the development of the Quad 4 engine were adamant to showcase the engine's capabilities. Under the leadership of Ted Louckes, head of the Quad 4 engine program, they convinced top management at General Motors to develop a research vehicle which would showcase the engine's true potential. Shortly after in 1985, a group of engineers was formed under the leadership of Louckes in order to develop such a vehicle. The vehicle called the Aerotech was to use a sleek body made form carbon fibre in order to keep the weight and the coefficient of drag low in order to achieve maximum aerodynamics. Supporting the body panels would be a modified version March Engineering's 84C CART chassis, the same chassis that was used in the winning car of the 1985 Indianapolis 500. Powering the car would be a turbocharged version of the Quad 4 engine, now modified to generate in excess of 900 hp (671 kW). The task of designing the car was given to Ed Welburn, the then assistant chief designer at the Oldsmobile studio.

The initial design sketches of the car were completed in early 1985. Inspired by famous LeMans winning race cars such as the Porsche 917, they quickly gained the approval from GM's top management. The first mock up of the car was completed shorty after the design's approval. Wind tunnel testing showed that the design was aerodynamically efficient but needed a few enhancements as pointed out by Max Schenkel, an aerodynamicist at General Motors who also served as a staff engineer on the Aerotech project. After many hours of wind tunnel testing at General Motors Technical Center at Warren, Michigan it was decided to alter the design by rounding off the shape of the nose and refine the canopy design. The air intakes were also moved from the sides of the car to the top of the rear fenders. Welburn had originally wanted the car to have a faired-in wheel wells but an objection by Goodyear, the tire supplier for the project prevented him from executing such a concept.

The biggest aerodynamic innovation of the design was the car's underbody, incorporatingadjustabke underbody panels which were adjustable to adjust the amount of airflow that flew through the car's underbody tunnels. This system not only generated great amounts of downforce but also allowed the engineers to adjust the system best suitable for different race tracks.

Welburn's original design incorporated a longer rear end, inspired by the Porsche 917 LH which contradicted Louckes' plan for setting a close cockpit record on the Indianapolis Motor Speedway. A long tail version would hinder the car's handling despite providing a lower coefficient of drag. A short tail version coupled with a pedestal rear spoiler was deemed more feasible.

By the end of 1986, the construction of the first car was completed, the car was tested by A. J. Foyt at the General Motors proving grounds at Mesa, Arizona. Foyt, who was initially skeptical about the car's potential, admired the car's capabilities as he managed to take the car to speeds up to 218 mph (351 km/h) on the test track. Foyt is said to have admired the car for its stability at high speeds.

As the car neared development, General Motors's senior management didn't gave the car approval for the record attempt at the General Motors Brickyard test track. The development team then chose to test the car at Ford Stockton test center located in Texas.

After the successful runs at the General Motors proving grounds, the development team decided to put Welburn's long tail design to test as well. Construction of a second car in this specification had begun in late 1985. The second car was almost the same as the first but featured elongated rear body work tapering downwards and a different engine, departuring from the original 2.3-liter single turbocharged Quad 4 engine built by Batten to a twin turbocharged 2.3-litre Quad 4 engine, built in collaboration with Fueling Engineering. The new engine proved to be even more capable than its predecessor and generated a maximum power output in excess of 1,000 hp (746 kW).

On 26 August, 1987, the development team in the presence of FIA officials, tested the two completed cars on the Ford Stockton test track. Initial tests with the short-tail version of the car resulted in an average speed of 250.919 mph (403.815 km/h) falling close behind the close cockpit speed record set by the Mercedes CIII-IV development prototype. As the team went on to adjust the car's aerodynamics, A. J. Foyt tested the second car (long-tail version). The long-tal version proved to be even more capable than its short-tail sibling and allowed Foyt to attain a top speed of 275 mph (443 km/h) at the flying mile after some practice runs.

The next day, Foyt set a new speed record with the long-tail version, averaging 267.399 mph (430.337 km/h) after flying mile runs in both directions of the track. The runs made with the now improved short-tail version shortly after, resulted in a new closed cockpit speed record of {cvt|257.123|mph|kph|3|abbr=on}}, beating Mercedes' record by a big margin.[1]

Oldsmobile produced three versions of the original Aerotech to prove the capabilities of the company's Quad 4 engine. Two cars were built with shorter rear body work and were called Short Tail versions (ST) and one was built with a longer rear body work and thus called the Long Tail (LT).

Subsequently, between 7–15 December 1992, another version of the Aerotech, this time powered by a 4.0 litre Oldsmobile Aurora V8 engine and now fitted with functional lights, broke 47 speed endurance records including the 10,000 and 25,000 kilometre world speed records. Other national and international speed records ranging from 10 kilometres to 24 hours were accomplished by a team of drivers working 24 hours a day for 8 days. These records were also set at the Fort Stockton test track.[1]

In popular culture[edit]

The speed records resulted in a great exposure of Oldsmobile and helped improve its sales. The cars made various appearances at autoshows across North America. A non-functional mock up with a makeshift interior also made its appearance at various circuit races. Ed Welburn, the designer of the car was also given the opportunity to drive the Aurora Aerotech in December 2010. However during that time, the car was limited to a mere 61 mph (98 km/h) to prevent any damages to the internal components.[1]

See also[edit]

External links[edit]

  • [1] HowStuffWorks.com - Oldsmobile Aerotech.
  1. ^ a b c d e McCausland, Evan (30 December 2010). "Ed Welburn drives the Oldsmobile Aerotech". Automobilemag.com. Retrieved 14 August 2018. 
  2. ^ a b c d e "Oldsmobile Aerotech Specifications". Retrieved 14 August 2018.