Segway Inc.'s Human Transporter (HT) models

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Segway HT e167 (e Series) Titanium-color with "e Stand" (OS 10-14.1)
Released 6/03, Discontinued 1/05, Original Price $7995 (Final Price $5500)
(click on image for larger one)

Gallery Commentary
The Segway Human Transporter (HT) e Series model, e167, was essentially an i167 plus added heavy-duty bag capacity. It's name "e Series" may have been used to promote the "e" as an abbreviation for "enterprise." The 167 was a reference the the 67% greater battery life it had compared to earlier ones tested with NiCad batteries. Initially, in late 2002, the e Series was not available to consumers but only industry clients and was priced at $7-8K. This model was initially targeted for commercial customers, like mail carriers, security and police. Later it was released to consumers at a $5500 price point. Some of the initial e Series HTs were sold with kickstands (just like the i167) but this soon changed when the e167 aquired one, very unique capability, the "e Stand." The "e Stand" was an electronic kickstand. Models with the "e Stand" no longer had a physical kickstand but were able to balance on their own after the rider stepped off. This capacity to self-balance was very desirable but apparently tricky to do. The HT was designed to work best with a human rider on-board and when missing that ballast, it's much less stable (click here to watch a movie of the e Stand (0.5MB file) in action).

University security personnel and Ventura County bomb squad officers on e167s.

Segway HT e167 (e Series) Titanium-color (originally released with OS 10.x) specifications

-Top speed: 12.5 miles per hour (20 km/h).
-Weight: 95 lbs (43 kg)
-Width: The Segway's footprint (how much space it covers on the ground) is 19 by 25 inches (48 by 63.5 cm). This makes the Segway about the same width as an average size person, so it doesn't take up much space on the street. The platform is 8 inches (20 cm) off the ground.
-Weight capacity: Rider- 100-250 pounds (45-110 kg); Rider & Cargo- 260 pounds (118kg). The e Series can accommodate a rider up to 250 pounds (110 kg). It also includes our commercial cargo system comprising of a front bag and two side-mounted bags. These bags allow for up to 75 pounds (34 kg) of cargo carrying capability, up to the e Series' 260 pound (118 kg) maximum carrying capacity.
-Range: About 8-12 miles (13-19 km) on even ground, with a single charge.
-Platform height: 8.3 in (21 cm); Footprint: 19 x 25 in (48 x 64 cm). Designed to take up no more space than the average person. Even when equipped with cargo carriers, the Segway HT e Series can easily navigate indoors and in dense pedestrian environments.
-Driver interface: The Segway has a small LCD screen that tells the driver how much battery power is left and how well the vehicle is functioning. The screen displays a cartoon face, which expresses the general condition of the vehicle. The driver interface is designed to be simple and intuitive.
-e Stand: Electronic parking stand- The e Series is the only Segway HT that has a self-balancing capability, called e Stand. This electronic parking stand allows the rider to get on and off the Segway HT without worrying about parking it. The e Series will balance on its own without a rider when used properly.
-Motors: Each of the Segway's wheels is driven by a 2-horsepower electric motor that produce no emissions.
-Transmission: The two-stage transmission, built by Segway and Axicon Technologies, has a compact 24:1 gear ratio. It uses a helical gear assembly that significantly reduces noise. The Segway team configured the two meshes in the gear box (the points where gears connect) to make sound exactly two octaves apart. This means the sounds are in harmony, so the gear box make a more musical noise. The gears are also designed to have noninteger gear ratios, meaning the gear teeth mesh at different points from revolution to revolution. This minimizes wear and tear to extend the life of the gear box.
-Computer: The Segway's brain is made up of two circuit boards, housed in the vehicle's chassis. The circuit boards, which boast a total of 10 microprocessors, normally work together, but each can function independently in the event of a computer problem. If one breaks, the other circuit board will slow the vehicle down gradually to avoid an accident.
-Power: The e Series has been outfitted with two 60 cell NiMH battery packs. The batteries are designed with on-board electronics that automatically monitor both the condition and temperature of the batteries. Batteries can be recharged by utilizing any 90 to 260 volt and 50 to 60 Hz AC outlet (typically accessible in most countries). A complete cycle charge will take four to six hours, which at 10 cents per KW-h, equates to less than 10 cents of electricity. NiMH batteries are designed for approximately 300-500 full charge/discharge cycles. Range, battery life and recharge times can be affected by factors such as terrain, temperature, speed of operation, rider weight and load, proper storage techniques and environmental conditions.
-Sensors: The Segway uses five gyroscopes and a collection of other tilt sensors to keep itself upright. Only three gyroscopes are needed -- the extra sensors are included as a safety precaution. The Segway has an additional weight sensor built into its platform to tell the computer when a rider has stepped on.
-Brakes: The Segway doesn't have a braking system. To stop, the rider stands upright without leaning forward or backward, and the vehicle maintains its position.
-Turning radius: Since it only has two wheels, the Segway can rotate around a single axis (the wheels turn in opposite directions). This gives the Segway a turning radius of zero.
-Wheels: The Segway wheel consists of a forged steel wheel hub with a glass-reinforced thermoplastic rim. Each wheel is secured to the drive shaft with a single nut. The tires are made of a silica compound, which provides good traction even on wet surfaces.
-Security: The Segway uses an electronic key system. The key, which looks something like a car lighter, stores a 128-bit encrypted digital code. The vehicle won't start unless the key is plugged into its port. The key can also store settings for vehicle operation. Segways include one key for "beginner mode," where the vehicle has a lower maximum speed, and one key for "experienced mode." Segway plans to offer programmable keys down the road, which well let users store particular operation settings.
-Chassis: The Segway's sensitive electronic equipment is housed in a sturdy die-cast aluminum chassis. According to Segway, the chassis can withstand 7 tons of force.
-Control shaft: The aluminum shaft that holds up the Segway's handlebars can be adjusted to different heights. Riders can attach clips to the shaft to carry bags or other cargo.

CHANGES: Elements of the e167 model that were changed from the i167 were: lower cargo system- a metal bar and its supports
added to firmly hold lower cargo, the new black cargo bags (although you could add them to an i167), a small clip on the control shaft
to support the bar, and some internal software changes for the e Stand mode, as well as a higher price (+$1000 or more).

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