David Nelson's 2003 Gizmo

Owner	David Nelson
Location	Kelso, Washington US ^map
Web/Email	WebPage
Vehicle	2003 Gizmo
Motor	D&D Motor Systems, Inc. ES-10C Separately Excited DC 15 HP Peak
Drivetrain	Belt Drive
Controller	Sevcon PowerPak PP745
Batteries	6 Trojan T-875, 8.00 Volt, Lead-Acid, Flooded
System Voltage	48 Volts
Charger	Zivan NG1
Heater	Body heat
DC/DC Converter	Sure Power Industries, Inc 41020C00 48V input 12A max, 12V out 20A max
Instrumentation	Analog Battery meter (no numbers) Digital speed-o-meter
Top Speed	44 MPH (70 KPH)
Range	24 Miles (38 Kilometers) I live in a hilly area so my range is lower than it would be on the flat. I'm sure I could go 35+ if I took it easy on the level.
Seating Capacity	1 adult
Tires	12" radials (145/70R12)
Additional Features	- AM/FM radio with CD player and a really huge filter to filter out the 16KHz noise of the controller. - I added some LED lights for cabin lighting. - 48V PowerPulse from PulseTech to keep batteries from sulfating. - Hydrocaps from Hydrocap Corporation, Miami, FL - PakTrakr with current sensor. I think I have a couple of weak batteries. The PakTrakr will help determine this. - All outside lights except the head light are now LEDs.
The local paper did a nice article on my Gizmo. The link is here: WebPage It actually was on the front page! My Gizmo had a 30 tooth drive gear and a 90 tooth gear on the rear wheel. My hill climbing and start stop driving was overheating the motor so I sent my motor to Jim Husted at Hi-torque Electric to be rebuilt. I have ordered a replacement drive gear with 22 teeth. 9/30/07 I have installed the 22T gear and driven a few miles. The motor is getting broke in now. Acceleration is is much better but the top end is a little weak. I've only hit 40mph briefly on a long flat run. My hill climbing speed has dropped from 27mph to 24mph at the steepest part of my hill climb home. The voltage, however, doesn't drop as far as it used to so I'm sure the motor current is lower than it used to be. The motor also doesn't seem as warm as it used to. I jacked the drive wheel up and ran the speed up to the max throttle. It only went to 55mph and this is with no load. The Sevcon PowerPak controller has a Traction Speed Limit setting which is maxed out at 51kph. I'm not sure if this limit is kicking in or not. 3/1/2008 The blinker lights were 23W bulbs and would cause the head light to dim when they blinked so when one burned out I replaced all of them with LEDs. 3/31/2008 I have sent off my right throttle handle and NORM circuit to Ron Anderson of Black Sheep Technology www.black-sheep.us to be rebuilt/replaced. If you have a Hall Effect type throttle on your Gizmo and you are having problems email me. I may be able to give you some help. 4/16/2008 I'm planning on adding some of my experience with my Gizmo and related information to my blog at WebPage . 4/2009 I've posted some of the things I've done on the Gizmo on my blog. I have the new Gizmo Interface with variable regen working, a new and bright adjustable headlight, new splash guards, and some new wiring. 11/2009 In the works... I'm in the process of building a set of coils to warm the air from defrost fan. I'm using the nichrome wire out of an electric 120VAC room heater. I'm also waiting for a pack of TS-LFP100AHA batteries since one of the cells in my T-875s went dead. It may have been reversed.

code by jerry