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Contents 1 About 2 Cars 2.1 Car 42 (2006/2007) 2.2 Car 49 (2005/2006) 2.2.1 Background 2.2.2 Components 2.2.3 Specifications 2.3 Car 61 (2004/2005) 2.3.1 Background 2.3.2 Components 2.3.3 Specifications 2.4 Car 36 (2003/2004) 2.4.1 Background 2.4.2 Components 2.4.3 Specifications 3 Team Sponsors

[edit] About

UNH Precision Racing is a non-profit Student Organization created by a small group of University of New Hampshire Mechanical Engineering students in 2003.

The goal of UNH Precision Racing is to build a scaled open-wheel, formula-style race car to enter in the annual Formula SAE event held in Detroit, Michigan. The vehicle is completely designed and constructed by students and, in addition, they do all of the fundraising and sponsorship to facilitate this. For more information on the competition itself and the associated rules, please visit the competition's website at [1].

You can find the team website at [2] and may contact them at [3]

[edit] Cars

The following is a summary of the UNH Precision Racing team's current and past Formula SAE racecars.

[edit] Car 42 (2006/2007)

Information and specifications coming soon!

[edit] Car 49 (2005/2006)

[edit] Background

The third season occurred from 2005 to 2006 in which Car 49 was created. An all new chassis was built with an attempt to create a lightweight chassis. This was done through the use of FEA analysis to create a very mature frame concept.

The engine and drivetrain were also highly-emphasized and went through significant revisions when compared to car 61. Basic fuel, timing, and compensation maps were developed through the engine by utilizing an engine dynamometer. Advanced maps, eventually squeezing 80whp out of the motor, were developed using an all-wheel chassis dyno courtesy of TDC tuning [4]. The drivetrain also switched from a spool setup to a limited slip differential which utilized a Torsen limited slip center diff. out of an Audi 80.

The team once again did not finish the vehicle as soon as was hoped, but it was finished early enough to get most of the drivers some seat time before competition. Once at competition, however, miscommunication within the team began to surface, both in personal relationships and in the performance of the vehicle. Such communication problems lead to a collapsed lower left-front A-arm during a practice session and later the lower right-front A-arm would collapse, ending the team's endurance event prematurely (with only 3 laps remaining!). Despite these shortcomings, the team did place 10th overall in acceleration and 29th overall in the presentation event. These results helped push the team to a 66th place finish, UNH Precision Racing's best result to date.

[edit] Components

• Chassis: Mild Steel Tubing
• Engine: 2003 Yamaha R6
• Intake: TIG welded aluminum plenum & intake runners with a rapid-prototype restrictor (the latter is courtesy of Wilcox Industries [5].
• Drivetrain: Torsen limited-slip chain-driven differential using CV joints and axles
• Suspension: unequal anti-parallel A-arms with Penske shocks front and rear; provisions for a FARB
• Controls: Rack and pinion, left-hand bump shift w/ prototype mechanical paddle shifting, floor mounted gas, clutch, and brake pedals
• Electronics: Standalone Performance Electronics engine management, digital dashboard with engine temperature, configurable shift and engine overheat lights, tachometer, and neutral indicator (NOTE: tachometer did not function properly), PC-based data acquisition system.

[edit] Specifications

• Weight: 550lbs
• Acceleration run(0-100m): 3.5sec (est)
• Skidpad: 1.2g (est)
• Overall Height:
• Overall Length:
• Overall Width:

[edit] Car 61 (2004/2005)

[edit] Background

The second season occurred from 2004 to 2005 in which Car 61 was created. An all new chassis was built under a new design philosophy that the suspension was the most important part of the vehicle and must be designed first. The suspension team gave the frame team the points needed in space for the attachment of the suspension prior to design so that accommodations could be made. The driver's seating position was drastically changed to allow the driver to lean back ad lower the center of gravity. The extended length was compensated by moving the wheel base closer together by using the front roll hoop as the attachment point of the suspension. The car's overall height was dropped significantly and the frame height was also dropped lower to the ground. The drivetrain built custom bearing blocks out of 6061 aluminum to reduce weight and make the shaft bearings easily removable for service.

The team once again felt the pressure of time and took many short cuts to get the job done in which led to later controls failure. The clutch cable broke during the second to last acceleration run causing the least run to be DNF. The subsequent repair took to long and the skid pad was completely DNF. During the Endurance race the first driver completed his 11 laps and the third driver lost fuel pressure on the eighth lap which was caused by a bad electrical connection to the fuel pump.

For the second year in a row it was obvious the tuning of the engine was going to have to be a high priority for up coming years.

[edit] Components

• Chassis: Mild Steel Tubing
• Engine: 2003 Suzuki GSX-R 600
• Intake: Carbon fiber 2x2 matrix plenum with a rapid-prototype restrictor (the latter is courtesy of Wilcox Industries [6].
• Drivetrain: Spooled chain drive using CV joints and axles
• Suspension: unequal anti-parallel A-arms with out board mounted fox shocks in the front and inboard in the rear
• Controls: Rack and pinion, right-hand bump shift w/hand clutch, floor mounted gas and brake pedal

[edit] Specifications

• Weight: 630lbs
• Acceleration run(0-100m):
• Skidpad:
• Overall Height:
• Overall Length:
• Overall Width:

[edit] Car 36 (2003/2004)

[edit] Background

The first season occurred from 2003 to 2004 in which Car 36 was born. The team struggled through financial and administrative battles yet managed to successfully complete building the car prior to completion. Being the first year for the team, development of designs were nearly non-existent due to team size, lack of money and support, and knowledge of Formula SAE design and fabrication. The car was able to begin every event at competition and finish all except the endurance race.

[edit] Components

• Chassis: Mild Steel Tubing
• Engine: 1999 Yamaha R6
• Intake: Aluminum Log style
• Exhaust: Custom fabricated resonator
• Drivetrain: Spooled chain drive using CV joints and axles
• Suspension: parallel A-arms with F4 rear shocks
• Controls: Rack and pinion, right-hand bump shift w/hand clutch, floor mounted brake pedal and roof mounted gas pedal

[edit] Specifications

• Weight: estimated 700+lbs
• Acceleration run(0-100m): 4.988s (81st place)
• Skidpad: 7.463s (82nd place)
• Overall Height: 51"
• Overall Length: 109"
• Overall Width: 67"

[edit] Team Sponsors

This list, while still far from complete is a list of previous sponsors of the UNH Precision Racing Team. Without their help and support, this project would not exist in its current form.

• Wilcox Industries
• RIC Racing
• AMS Plastic Extrusions
• Tucker Engineering
• Capitol Copy
• Crown Lending
• Penske Truck Leasing
• TDC Tuning
• Brad Purmort Woodworking