UELVE MBC/v0.1: Difference between revisions

From Open Source Ecology
Jump to navigation Jump to search
(Created page with "= Basics = * A vehicle design utilising Fiber Composite Reinforced Pipes. The design is focussed on efficiency. * The acronyms stand for Ultra-Efficient Libre Vehicles fo...")
 
No edit summary
Line 1: Line 1:
= Basics =
= Basics =


* A vehicle design utilising [[Fiber Composite Reinforced Pipes]]. The design is focussed on efficiency.
* A lightweight (200 kg) 3 occupant vehicle design that can be mostly DIY constructed.
* The acronyms stand for Ultra-Efficient Libre Vehicles for Everyone - Myth Busters Car
* Dimensions 1.5 x 3.1 x 1.1 metres for a front surface area of approx 1.5 sq. metres
* Is a prototype for further iterations of vehicles using similar methods for various other vehicle types, as well as structures such as furniture, sheds and semi-permanent buildings.
* Geodesic Frame skeleton is bamboo and PVC pipes connected together with 3D-printed software-generated "Nodes", which are then entirely encased in Expoxy Resin and Fibreglass, Kevlar, Hemp, Flax or other high-strength cloth layers.
 
* Double wishbone suspension is expected to be fitted at the front, whilst the rear may be swing-arm, Double-wishbone or Macpherson. This revision uses swing-arms at the rear.
Versions:
* Body panels are twin layers of Fire-resistant Non-woven Polyester with a hot-glued 4 layer latticework "Hobbycraft" 9x1mm bamboo frame inside (9x1mm is easily bendable) to create compound curves. Label-gun "barbs" pin the two polyester sheets at a regular 10mm spacing, and Soudal Fire-resistant Expandong foam injected into the gap.
 
* [[UELVE MBC/v0.0]] (concept)
* [[UELVE MBC/v0.1]] (build underway)
 
=The Embassy Elf (MBC UELVE) Introduction=
The MBC (Myth Buster Car) is intended as a lightweight proof of concept for further development of additional larger (and smaller) 3 and 4 wheeled hybrid and tribrid electric vehicles such as solar vehicles, hydrogen-intake-injected and more.  It's also intended to be eco-conscious, ultra-efficient, ludicrously high acceleration, low cost and eye-catching (hence the cross between a 2-seat sports car and a "Mad Max" off-road look), and intended for the average person to 3D print (or buy a pre-printed kit) and assemble in under five days.
 
Once completed the tools (including a specialist dedicated kevlar-crosshatching [[Fibre_Reinforced_Pipe_3D_Printer]]) and design techniques will be in place to expand the concept to other vehicles (as well as furniture and buildings).
Other vehicles will not have the same "wow" factor however by going initially for a vehicle that is likely to be stressed to its limit (off-road, racing), design and materials flaws will be quickly found and fixed, long before more "ordinary" vehicles begin production.
 
== Acronym decoding: ==
 
* UELVEs: Ultra-Efficient Libre Vehicles for Everyone.
* MBC: the Embassy, or the "MythBusters Car" (get it?), in honour of their discovery that a golf-ball texture on a car bodypanels significantly improves fuel economy. https://www.youtube.com/watch?v=VUiGhyHC-1A


= Frame Concept =
= Frame Concept =
Line 26: Line 12:
Blue pipes are 1m measure sticks. Note that the body takes whatever form we would like.
Blue pipes are 1m measure sticks. Note that the body takes whatever form we would like.


= Minumum Viable Product =
{{Hint|Holy shit.}}
* 4 wheels using mountain bike 19in rims and 2.75/19 motorcycle tires (26in outer diameter)
* 100kg weight (full, complete vehicle)
* 2 occupants
* Twin 3-5kW Axial Flux BLDC chain-driven motors (no gearbox needed)
* 1.1 x 1.5 x 3.4 metre dimensions with an "airbox" down the centre
* Only a 1.1 m^2 front surface area (due to the "air tunnel")
* 0-60mph in under four seconds (Sur-Ron "3" kW Motors can be pushed to 13kW for short durations, and there's two of them)
* over 200mpg at 55mph due to low weight, low rolling resistance, reduced surface area and low drag coefficient.
* capable of driving up a 50% gradient at around 25mph with 2 occupants.
=Final Build Specifications (Post Build Tests)=
*
=Notes=
* While world records are held for under 3 seconds, under 4 seconds is close to world records. [https://en.wikipedia.org/wiki/List_of_fastest_production_cars_by_acceleration]. We can emphasize here that for "acceleration per horsepower", ours here is probably a world record. Luke - have you done the numbers on this one?
* with the simulator i wrote a few years ago, yes.  link at bottom of page.  it's the reduced weight, reduced drag coefficient and the SurRon axial flux motors which can do 13KW for short bursts that do it.  the world record is an MIT team EV with 4 hub motors.  0 to 60 in 1.9 seconds. in the slo mo the walls of the tires actually buckle under the acceleration.
Correction: that MIT team has been beaten by AMZ, who officially managed 0 to 60 (100km/h) in 1.513 seconds


{{YoutubePopup|n2XiCYA3C9s}}


=Basic Design Concept=
* Use high-end downhill mountain-bike parts that have been proven to be light, strong and effective up to a 50kg weight with an 80kg load, thanks to the Sur-Ron Electric Bike.
* Use twin Sur-Ron direct-drive 3-5kW Axial Flux electric motors
* Use twin ASI BAC4000 BLDC Controllers (or VESC Vedder BLDC Controllers http://vedder.se/2015/01/vesc-open-source-esc/)
* Outer skin using the GABoats technique (Geodesic Aerolite Boats) - http://gaboats.com
* Outer skin using the GABoats technique (Geodesic Aerolite Boats) - http://gaboats.com
* Inner frame using 3D-printed fibre-reinforced "nodes" connecting continuous-fibre-reinforced pipes on a [[Fibre_Reinforced_Pipe_3D_Printer]] or getting carbon-fibre, hemp-reinforced tubes (or even Bamboo), based on the Divergent 3D "Blade" car manufacturing concept https://www.youtube.com/watch?v=vPv7PwS50OE
* Inner frame using 3D-printed fibre-reinforced "nodes" connecting continuous-fibre-reinforced pipes on a [[Fibre_Reinforced_Pipe_3D_Printer]] or getting carbon-fibre, hemp-reinforced tubes (or even Bamboo), based on the Divergent 3D "Blade" car manufacturing concept https://www.youtube.com/watch?v=vPv7PwS50OE

Revision as of 05:28, 25 January 2023

Basics

  • A lightweight (200 kg) 3 occupant vehicle design that can be mostly DIY constructed.
  • Dimensions 1.5 x 3.1 x 1.1 metres for a front surface area of approx 1.5 sq. metres
  • Geodesic Frame skeleton is bamboo and PVC pipes connected together with 3D-printed software-generated "Nodes", which are then entirely encased in Expoxy Resin and Fibreglass, Kevlar, Hemp, Flax or other high-strength cloth layers.
  • Double wishbone suspension is expected to be fitted at the front, whilst the rear may be swing-arm, Double-wishbone or Macpherson. This revision uses swing-arms at the rear.
  • Body panels are twin layers of Fire-resistant Non-woven Polyester with a hot-glued 4 layer latticework "Hobbycraft" 9x1mm bamboo frame inside (9x1mm is easily bendable) to create compound curves. Label-gun "barbs" pin the two polyester sheets at a regular 10mm spacing, and Soudal Fire-resistant Expandong foam injected into the gap.

Frame Concept

Uelves mbc.jpg

Blue pipes are 1m measure sticks. Note that the body takes whatever form we would like.


CAD Source Code

BOM

estimated, todo steering and suspension

  • 300 metres bamboo canes between 8 to 13 mm diameter, or 300 metres PVC or other pipe or straight sticks. (structural strength is non-critical)
  • 200 metres
  • 500 metres 25mm width "Painter's" Masking tape

Videos

Screenshots / Images

MBC doorframe geometry.jpg

See Also

Useful Links

Retrieved from "https://wiki.opensourceecology.org/index.php?title=UELVE_MBC/v0.1&oldid=279438"