British
Human
Power
Club

Raven Streamliner 

Really really wanted a fully faired bike or trike and finally got a chance to own a Paul Davies Trike. Built the Trike and when I placed the trike in the shell I had knee clearance issues, I modified the trike to suit and did ride the Trike around a bit at the Worlds in Brighton but managed to break the seat and support brackets on the Trike. Gave the whole bike/trike thing a break for a while as every step I made I seemed to create more problems. I modified the screen to allow my knees to clear but by this point I knew that if I wanted to go really fast it would have to be on 2 wheels and I seem to get more of a kick from the designing and building than the riding. I began work a long and low streamliner plug very similar in appearance to the critical power HPV built by Greg Kolodziejzyk  http://www.adventuresofgreg.com/HPVMain.html but using a larger rear fin. Doing some research a lot of people were building the same kind of teardrop long and low HPV. Then I saw the article on the Kingsbury's Mango and I scrapped the original plug. I liked the concept of a racing cyclist position rotated and a short and very small streamliner. Lots of potential for variation in design and a bit different to what everyone was/is doing.

Played about on the computer creating shapes and making small models from styrofoam. I settled on a basic concept and knowing from past experience that making the screens can be difficult I searched ebay and bought a motobike fairing screen to work around. I then printed out some templates and made a MDF skeleton frame and inserted Polystyrene into the gaps between the MDF. The MDF framework then gave me a guideline to run a hot wire cutter around. I then covered this with fibreglass and began to add car body filler. Two jobs and two house moves and poor weather kept pushing my 12 month deadline further and further back.

Roof Chop 

Nearly complete

Testing to fit

Hope I still fit inside

Sizes:

Length: 70 inches = 177cm

Width: 17.5 inches = 44cm

Height 39 inches = 99cm

Wednesday, August 4, 2010 1:18:54 PM

Blue Meanie 

I started this project in 1994 when I was still at school, looking for a better way to commute the 5 miles to school. The bike has gone through several variations, initially starting off as a bike that would fit into a backpack. I liked to smallness of the Brompton but it looked like something a Granny would ride to market. The bike then changed from a upright to a recumbent after I saw a leaning FWD trike in Lancaster one year. The bike was made up into a very crude complete bike to test my folding sequence. It still folds into a backpack sized package - but is slowly being made into a everyday bike when money allows the various one off pieces to be made.

First Prototype fork

I don't like the twisting chain designs so I set about designing a solution that avoided any torque steer and chain twist

Prototype

 

Newly machined fork - still needs a little bit of work to reduce weight - used a canti-drive hub

New Fork

New Fork

Front View

Complete Drive System

 

Virtual Bike in Solidworks

 

Updated the CADCAM model to show to bb arrangement - will be using this setup in the streamliner too - bb width is 50mm. Have also found a suitable CNC company and the rest of my components are being machined.

Aluminium has been shipped off - been told it will be a week to produce the parts for the swingarm

 

 

Wednesday, August 4, 2010 12:48:00 PM
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