Cargo Trike - when it's all said and done...

Page 1 - Rear frame and pivot

Page 2 - Front frame

Page 3 - Completing frame details

Page 4 - Paint, Cargo Box, Lights, and Road Test

Page 5 - Getting the last bits done

Page 6 - Observations, and photos of working and playing.

Conclusion - when it's all said and done...

Update: revised front wheel and brake.

This project was a team effort, and I wish to thank the people involved.

First and foremost is Juergen Weichert, who said to me "I have the welding tools, you need a trike, so let's get together and build one!'. Juergen only wanted to have his costs covered, and looked at this project as a way of honing his welding skills. He was also extemely patient, and helped me sort out design issues (of which there were many, since we were not using plans, but working from photos, and had to modify things to suit my needs). He also gave me full run of his basement workshop, and that made a huge difference. Thanks also to his partner Julie and their two kids for putting up with me sawing away in their basement, or just in my coming and going up and down the stairs with various tubes of metal in various stages of joinery. They even fed me on some evenings when it got too late, and I am forever grateful for their kindness and generosity.

Secondly is Richard Guy Briggs, who offered to put together the electrical system. I knew I wanted the trike to have running lights and turn signals, etc. but I am not well versed in matters electrical. And believe it or not, you are out of luck if you want to buy an off the shelf system for your HPV. But Richard wanted to make someting universal, but of course there has to be a ptorotype. He designed the circuit board and switching, and also helped me sort out what lights to use. The resulting LED-based system draw only 4 watts of power! We worked well into the night to get the trike ready for its debut at our local St. Patricks Day Parade, where it performed without a hitch.Thanks also to Jody McIntyre for finding me a place to paint the frame, and he also recently did a rebuild of the switching circuit due to some teething issues (he and Richard will hopefully have a write-up about this circuit soon). Lastly, thanks to Dan Kavanaugh of Organic Engines, who let us "steal" his design. Dan was not able to provide plans, but did give us some tips via email and phone, and we worked from there with the photos on his webpages.

Trike parts list: (revised for 2005)

Crank - Shimano alloy 38 tooth
Chain - SRAM
Bottom Bracket - Shimano UN-72
Pedals - generic plastic
Front wheel - Alex 406, DT stainless spokes, Sachs 3x7 hub with custom 7-speed cassette (14,17,20,23,26,28,32)
Rear wheels - Alex 406
Tires - Schwalbe "Big Apples" 50x406 (the perfect tires for cargo use, IMO. Can run at low pressure without dragging. I run the front at 70 and the rears at 30-50).
Brakes - Shimano Deore V-brakes
Main frame tubing - 1x1.5" .065" mild steel
Front wheel frame - chopped generic 10-speed rear triangle.
Other front tubing - half inch rod, .065 mild steel
Handlebars - 7/8" .065 mild steel
handlebar mount - top part of BMX 4-bolt stem
Boom tube - generic 10-speed seat tube and alloy road stem
Boom light mount - 1.25" aluminum shower curtain rod.
Mid-ship pivots - beefy 1/2" rod ends with grease (zirc) fittings
Rear axle plates, square tube end caps, and cargo box mount plates all cut from flat steel plate.
Front light - Luxeon 1-watt white LED, enclosed in 1970's plastic headlamp.
Front running lights and taillights - DOT-approved 10-cluster LED (x4).

Thanks for reading!


Copyright 2006 Mark Rehder; Ottawa, Ontario, Canada.