View Full Version : Retroadster Velocar

09-18-2015, 04:49 AM
Hello all.

I want to show my velocar building project here.
It's in progress since 2011, with the first ride in 2012, full body since 2014, Sun roof in June 2015 and still got some improvements.
For me it's a learning by doing project.
The steel frame is great for changing system components by cutting, welding, grinding and cutting, welding......:evilgrin::builder2::evilgrin:

This is the frame freshly welded in 2012. The offset rear wheels are enabled by small jackshafts under the seats.
These are made from bicycle hubs with welded on sprockets.

Steering system with ball joints.

Me and my youngest daughter in autumn 2012

09-18-2015, 05:09 AM
The full body was build in April 2014
Ignition point was the moment, when my daughter was sitting in the box trunk and got the idea to grab at the spinning wheels outside.
Luckily nothing happened, but I thought about horrible consequences seriously.
Now the rear wheels are fully enclosed.



The velocar fits perfectly through this chicane:punk:

Time for a break

09-18-2015, 05:57 AM
Nice lines and finishing touches

have you weighed it ?

regards emma

09-18-2015, 06:08 AM
The Velocar is heavy.
Around 85kg.
If two persons are pedalling, it's of course easier.
An electric motor is legally possible here and on the top of the ToDo-list.

09-18-2015, 08:14 AM
Thanks for sharing.
Out of curiosity what thickness plywood did you use? It appears fairly thick in the photos like ~ 1.25 cm or thicker.
It looks really cool and I bet you get tons of looks when going down the road.

09-18-2015, 08:27 AM
Plywood thickness is 4mm.
All edges are reinforced with spruce 15mm square battens.
For all curved edges I made curved battens by glueing/laminating three 15x5mm battens over a template.

09-18-2015, 08:33 AM
I see the 15mm edging must be what gives it the thick appearance.
I checked out your blogspot. Love the layout. Again thank you for sharing. It is some lovely work. And it looks like your children and wife enjoy sharing the ride with you.

Very nice ride.

Radical Brad
09-18-2015, 10:31 AM
Great machine, and a perfect flat scenic road to ride it on.


09-18-2015, 03:32 PM


09-18-2015, 04:27 PM
Very nice! I'd be interested in more detailed pictures of the rear end of the chassis, particularly the suspension and drivetrain :)

09-19-2015, 03:29 AM
The suspension is still not working.
I've built swingarms with "pull rods" which actually are simple ropes.

Each drivetrain consists of two chains and a jackshaft in between because the rear wheels are not in line with the cranks.
I have shifted the wheels outwards, what gives more space for the trunk and better cornering stability
During construction, the jackshaft under the stokers seat.
Jackshafts are made from old bicycle hubs with welded on sprockets

09-19-2015, 03:43 AM
In June 2015 we joined the Maker Faire Hannover.
A few days before, I made a soft top for the Velocar.
First sewing work since 20 years, but I'm satisfied with the result.
We offered free test rides to the visitors and had a lot of attention.




The link to my Maker Faire blog post: Click (http://plycar.blogspot.de/2015_06_01_archive.html)

04-30-2016, 10:35 AM
Exceptional Build!!!!! Just fantastic!!