Sunday, 10 September 2017

Full size mock-up of Velomobile chassis

Mockup of velomobile semi-monocoque to test size and entry/exit. Will have to tweak the design a little. Very easy to get into but a little tight around the shoulders. Will revise.

Veloci-velo
Velocivelo semi-monocoque ©2017

Saturday, 25 March 2017

Practical City Velomobile

I see a need for a velomobile that can integrate well with city traffic. This would mean a higher seat height and room for a child and/or groceries in the back. Again the design must be lightweight and aerodynamic. I really like the Mochet Velocars of the 20's, 30's and 40's . Below is what I see as a possibility.

Length = 2400mm   Width = 1000mm   Height = 105mm  Weight = 45kg





Wednesday, 22 March 2017

Wheels out velomobile

Here is a render with exposed wheels on Veloci Velomobile. Advantages of this design is the ability of  a tighter turning circle and ease of changing a tyre. I like the look of such velomobiles with the only downside being loss of aerodynamic efficiency (this would be quite small).


Wednesday, 22 February 2017

Elevation of semi-monocoque velomobile

Here is an elevation showing the position and size of the semi-monocoque chassis. Attached to the monocoque will be the rear swingarm, and the front a subframe to locate pedals and front suspension pickups. Again using a semi-monocoque will hopefully make for a lighter velomobile. The semi-monocoque will have to be stiff enough to take loads from the subframes without excessive bending or twisting. I have decided that a good quality plywood would be best for the monocoque for cost for performance.
semi-monocoque velomobile
Semi-monocoque

Saturday, 21 January 2017

Electric assist on velomobiles

After about six months of no progress due to building a new home I have finally got my workshop back and will be starting work on Veloci-velomobile once again.

In this time of limbo I have thought about having electric assist on  a velomobile and came to the conclusion that it would be advantages to have such a system.
Advantages would be...

  • Faster acceleration from standstill and rolling acceleration
  • Easier climbing of hills
From reading reviews of various systems including hub motors, mid-drive and direct drive I believe that a mid-drive system would be best due to the fact it will use the gearing already in the bike. I really like the 8fun system which can be configured with different power outputs to suit regulations. Most common is 250W (Australia & Europe) 300W (New Zealand) and 750W (USA).


Even with 250W the acceleration would be quite impressive and with the aerodynamic advantage of Veloci-velo top speeds would/could  be..

  • 250W = 75 km/hr (46 mph)
  • 300W = 82 km/hr (50 mph)
  • 750W = 120km/hr  (74 mph)
When designing Veloci-velo the design brief was to have a vehicle that could maintain 40km/hr for the average rider so the electric assist needs to be no more than 300W and geared to provide the best acceleration up to the 40 km/hr limit.

See table below...



Wednesday, 14 September 2016

Semi-monocoque velomobile

Final render of velomobile semi-monocoque to be manufactured from plywood. The render does not include a few cut-outs for other components. I hope to get the final weight of this component down to less than 5 kilograms. This final design allows a 'safety capsule' around the rider a feature that I really wanted to have. Making from plywood makes an easy build and the possibility of a true 'flat pack' kitset velomobile. I am exploring the possibility of this being a Open Source Velomobile as this may lead to faster development once the basic design has been done.

Semi-monocoque velomobile chassis
©2016 James McLeod