The '''XR-3 Hybrid''' is a plug-in hybrid kit vehicle from Robert Q. Riley Enterprises.
The top speed is {{convert|80|mph|abbr=on}} and fuel economy is {{convert|125|mpgus|abbr=on}} on diesel power only and {{convert|225|mpgus|abbr=on}} on combined diesel and electric power.
The vehicle body is FRP/foam composite.<ref>{{cite web |url=http://www.rqriley.com/frp-foam.htm |title=Using Fiberglass/Foam Sandwich Composite |publisher=Rqriley.com |access-date=2010-11-27 |archive-date=2011-01-08 |archive-url=https://web.archive.org/web/20110108001524/http://rqriley.com/frp-foam.htm |url-status=dead }}</ref>
The vehicle is built from plans, with parts sourced by the builder, although a kit with pre-assembled parts may be sold sometime in the future.<ref name="rqriley.com">{{cite web |url=http://www.rqriley.com/xr3.htm |title=XR3 Hybrid Personal Transit Vehicle: A 125 mpg Plug-In Hybrid Three Wheeler You Build From Plans |publisher=Rqriley.com |access-date=2010-11-27 |archive-date=2010-09-02 |archive-url=https://web.archive.org/web/20100902093111/http://www.rqriley.com/xr3.htm |url-status=dead }}</ref>
As of March 27, 2021, their official website is suspended. A member of Elio Owners Forum has reported that attempts to reach them on their facebook page were unsuccessful.<ref>{{cite web |title=Elio Owners Forum |date=4 March 2014 |url=https://www.elioowners.com/posts/210620/}}</ref>
== Powertrain and range == The two front wheels are powered by the diesel or biodiesel internal combustion engine (ICE) and the single rear wheel is electric powered. The two power systems are ground-connected, meaning that they both drive wheels along the ground but are not connected at all within the vehicle, which allows owners to add and remove the diesel and electric propulsion systems separately and use either or both.<ref name="rqriley.com" /> With only a diesel engine and the vehicle's standard tank holding {{convert|3|USgal}}, range is {{convert|400|mi}}, and with only an electric motor and full battery packs, range is {{convert|100|mi}}.<ref>{{cite web|last=Blanco |first=Sebastian |url=http://www.autobloggreen.com/2009/06/08/xr3-plug-in-hybrid-trike-headed-for-production/ |title=XR3 plug-in hybrid trike headed for production — Autoblog Green |publisher=Autobloggreen.com |date=2009-06-08 |access-date=2010-11-27}}</ref>
== Price == A duplicate of the Lithium-ion battery powered prototype will top $25,000, including $7,500 for batteries and an advanced DC {{convert|8|in|adj=on}} motor. Lead-acid batteries trim cost between $1,500 and $2,000. However, a diesel-only vehicle can be built for less than $10,000, and the modularity of the design allows an electric power train to be added easily later.<ref name="rqriley.com" />
== Safety == The vehicle has a roll bar, seat belts, foam in the sides and front of the vehicle ranging from {{convert|5|to(-)|10|in}}, and a horizontal steering column intended to be pushed away by a driver thrown forward by an accident without harming the driver, unlike a conventional car's steering column. It does not have airbags, large steel beam crumple zones, or an anti-lock braking system.
== Notes == {{Reflist}}
== External links == * {{Official website|http://www.rqriley.com/xr3.htm}}
{{DEFAULTSORT:Xr3 Hybrid}} Category:Plug-in hybrid vehicles Category:Kit cars Category:Three-wheeled motor vehicles
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