Sonntag, 24. Mai 2015

Improved plywood frame

Hi

Over the last weeks I completed a new wooden frame.
It's build like my previous frame from 4mm plywood and spruce stringers.
This time I have used gaboon/okoume plywood (marine grade) instead of birch.
It's more rot resistant and much lighter than birch plywood, it has just 2/3 or less the specific density of birch.
I also decreased the height of the frame from 20cm/8in to 18cm/7in to get a slightly lower seat position.
While the birch frame from two years ago weights 25kg, the new okoume frame weights just 16kg.
Wow, 9 kg saved !!!
That's the weight of a complete racing bicycle.
I hope, to save another 10 kg in the new bodywork, also made from okoume.

Frame without top panel shows the spruce stringers


On the scale

Nearly 15kg and a few pieces still missing

A quick mockup in the garden

The lines of the future bodywork 

Kai




Sonntag, 29. März 2015

Cargobike Race Berlin

Hello folks.

Friday a week ago we made it to Berlin to meet our friends Andreas and Steffi.
We spent three hours on the Autobahn with our old truck and the velocar safely tied onto the truck bed
Saturday we joined the "Velo Berlin" bicycle fair. 
The Cargobike Fans Berlin have organized a race there, in which I wanted to participate.
Despite the rather cold and rainy weather it was great fun to meet all these crazy people.
A great variety of bikes were gathered: 
Rickshaws, Long Johns, cargo trikes (one leaning trike), longtail bikes and another four wheeler.
The drivers had to start in two divisions. two wheelers and three/four wheelers.
All had to complete one lap with the empty bike, then loading their bikes with two water containers, two bundles of newspapers and three short plastic pipes.
Due to two low ramps, which were set as chicanes on the race track, all had the choice to pass them at low speed or to risk the loss of some of the cargo stuff, what happens several times.
This resulted in permantly braking and accelerating, what my velocar is not made for.
Every time I passed the ramps, the hard backrest hits my back and this left a painful bruise there.
But because of my deep cargo trunk, nothing worse happened and despite my rather low speed I was able to overtake some of the competitors, who had to pick up their lost cargo from the track
Finally I became second place (of eight, I guess) in the multi track division, behind the mentioned leaning trike, a Veleon.
I had not the slightest chance against that high tech thing.

As always, here are some photos from that weekend:

A short ride with bicycles and velocar around Lake Grunewald

Still in Berlin-Grunewald we made this 
"Eight-cylinders-vs-four-legs"-photo

 Andreas and my son in the Retroadster

 Lake Grunewald

 Daddy is not to see here, because he's behind the camera


At the race

Two wheeler start

 (photo: Andreas Kuppinger/www.nutzrad.de)

(photo: Andreas Kuppinger/www.nutzrad.de)

 Three/four-wheeler start 
(photo: Andreas Kuppinger/www.nutzrad.de)


overtaking is difficult on this narrow track
(photo: Andreas Kuppinger/www.nutzrad.de)


A short video of one of the multitrack races

The winners:

First place two-wheelers

Second place two-wheelers

First place three/four wheelers

Me at second place


Test drive after the race

Much more pics of the race can be seen at the FB-account of the Cargobike Fans Berlin



Sunday:

 We cycled to a nearby horse ranch for child entertainment.

 This is Steffis own Icelandic horse






Kai




Donnerstag, 1. Januar 2015

Rare literature from France

Hello folks.

I have found an old French book with plans and building instructions for many projects, from bicycle sidecars, velocars to small motorized sportscars.

Somewhere in the book I found a two seater velocar, wich is quite similar to my project:







The book was printed shortly after WW2, so the motivation for building such things  may have been different than nowadays.

Then it was simply the lack of alternatives:
Almost no cars at the market, no gas to run them and just low tech materials available (mostly wood).

Nowadays it's more a fun thing for persons, who are not pleased with all these usual high volume products, and instead build themselves an unique piece of craftmanship, which cannot be found elsewhere.


Happy New Year,
Kai













Freitag, 28. November 2014

Sum up 2014: Autumn rides

This year we made several rides through the surroundings and, 
of course, taking a lot of photos.
In the beginning of October we cycled to Muenchenbernsdorf, a small town nearby.
We overnighted with friends and drove back home the next day.
All in all we covered 53km, not that bad for two lazy cyclists with a heavyweight velocar, a child on the rumble seat and lots of luggage.


Solitary forest roads

 Shortly before we arrived Niederpoellnitz

Are such obstacles able to rise the mood of cyclists?

In this case: Yes


Finally in Muenchenbernsdorf:
Take a break

In the central "city"

On our way back at afternoon


In this years "golden" November we had another nice Sunday afternoon ride in the forest.
As long as I can remember, it was the first time I weared just a T-shirt outside in November.


This little house in the forest should be made of gingerbread


Amelie is now able to ride her own little bike at age 3.
She learned balancing the bike within an hour or so.

Kai

Sum up 2014: Netherland

In spring 2014 we visited Marlies and Olaf in the Netherlands.
They are living near Utrecht.
Olaf shares the same interest in building velocars, velomobiles and other unique bikes.
 He operates a blog about his creations and a HP also

Can't say, why I forgot to mention this trip in my blog.
Maybe I lost overview, in which forum I had posted and in which not.
Anyway, here are some impressions from this very interesting visit.

Amelie and me in the "Vrijwiel"

 Visiting Kamerik
The two velomobiles are also build by Olaf.



My  not yet ready build velocar in front of Olafs workshop

Vrijwiel rulez !

Size comparison:
The Vrijwiel is much more compact.

"Sundays Odd Bikes Ride" 






Back at the workshop for a cup of coffee

Olaf is a prolific bike builder.
Most bikes used on this ride were build by him.
I forgot to take a picture of his lawn mower bike.

Thanks to Marlies and Olaf for this very interesting weekend.

Kai