Human Electric Trike Thesis

Design of an electrically assisted human powered trike

Archive for September 30th, 2006

Fabrication Status

Posted by Bob Dold on Saturday, September 30, 2006 3:36 PM

Fabrication of components is progressing ahead of schedule, the spreadsheet below shows the status of the parts that have been completed and those that are left to build:

On Friday I went into the shop and cut most of the tubing to length for the frame rails and rear swing arm. I also did the the bonding of the lower a-arm assemblies using the Loctite 680 as the adhesive. Bond prep consisted of  cleaning with Scotchbrite and then wiping with Acetone and then applying the green adhesive. The 680 took about 15 minutes to set and seemed to completely cure in about 24 hours. The pictures below show the lower a-arm and the sides of the swingarms bonded together:

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Water jet part quote

Posted by Bob Dold on Saturday, September 30, 2006 3:02 PM

Found an online waterjet cutting service that provides instant quotes for cutting parts from a DXF file: www.bigbluesaw.com. I arranged all my 1/4″ aluminum plate parts I need made into an assembly file and nested them together to reduce the material needed. I then uploaded it to Big Blue Saw and they provided the following picture of the cut parts:

Their online software automatically identified the 22 parts and provided the following quote:

Delivery is 2-3 weeks.

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