MD-250-HD

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MD-250-HD Overview

MD-250-HD-SE/DE –for testing heavy-duty Diesel, Electric and Hybrid Electric trucks and buses

The MD-250-HD series dyno (SE/DE) was designed to be a performance dynamometer first with the added benefit of being able to test 2-wheel-drive heavy-duty vehicles such as truck, buses and commercial vehicles in addition to the standard car or light duty pick-up. The 250-HD is certified in the states of Colorado, Nevada and Utah for use in loaded-mode diesel smog testing programs because of its accuracy and reliability. No other dyno in its class offers more value or better in-house motor vehicle testing capabilities than the Mustang MD-250-HD. For starters, the MD-250-HD boasts a 1,500 horsepower measurement capacity at a top speed of 175 mph and a powerful air-cooled eddy current brake provides the MD-250-HD-SE with 900-hp worth ofloading capacity for steady state testing. Loading capacity can be increased to 1,500-hp via the optional DE model. The 250-HD can be upgraded to the 250-HD-SE-M via the addition of a 100 or 200 hp AC motor for transient testing of electric buses to measure range and regeneration or for emissions testing of IC engines. Do not be fooled by its compact size – the MD-250-HD is a serious dynamometer with serious tuning capabilities. The MD-250-HD uses a powerful eddy current power absorber, a frictionless, air-cooled braking device, to enable it to apply variable and steady state loading. A complete control and data acquisition system lets you design a wide range of tests or select from a host of pre-configured tests included with the standard system. The 250-HD’s four roller design makes setting up vehicles a snap – simply drive onto the 250-HD and let the tires settle in between the rollers. The 250-HD can be installed above-ground or below-ground, it’s your choice. The above-ground system utilizes an optional premium platform and ramp system with an above-ground restraint kit. The addition of an axle pull-down kit help keep the tires from slipping or trying to “climb out” of the rollers.

MD-250-HD Specifications

Max Horsepower: 1,500 hp peak measurement capacity

Max Absorption: SE Model 900 hp peak absorption (DE Model 1,500-hp, optional)

Loading Device: Air-cooled eddy current power absorber (second PAU is available as an option to increase loading capacity to 1,500-hp)

Motor: Available as an option for transient testing

Inertia: 2,000 lbs. base mechanical inertia, nominal

Max Speed: 175 mph

Controls: Closed Loop Digital Controller with web based Holeshot Software. Includes Patented Virtual Road Simulation Technology.

Rolls/Wheelbase:

Precision machined & dynamically balanced
Knurled surface finish
10.7” (272 mm) diameter balanced rolls
40” (1,016 mm) face length
28” (711 mm) inner track width
108” (2,743 mm) outer track width
19.6” (498 mm) roll spacing
Rollers are belted for bi-directional testing capability

Roll Lock: Between roll lift with integrated roll lock

Roll Decelerator: Allows vehicle deceleration without use of vehicle brakes. Eddy Current PAU used to decelerate rollers.

Air Requirements: 120 PSI, dry, regulated, oil free

Power Requirements:

115 VAC, single phase, 60 Hz, 20 Amps (instrumentation)
230 VAC, single phase, 60 Hz, 40 Amps for the SE model (dynamometer), three phase, 60 Hz, 50 Amps for the DE model

Axle Weight: 24,000 lbs. (10,886 kg) maximum

Shipping Weight: 5,000 lbs. (2,265 kg) dynamometer weight only (Add 1,500 lbs./680 kg for the DE model)

Upgradeable to AWD: No