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The idea for the 2002-model was initiated by a La France Simplex from 1917, which occasionally
was to see on diverse oldtimer events.
The data of motorization: 4 cylinders, 10500ccm cylinder capacity, power approx. 75PS.
Remarkable at this vehicle are the chain driven rear wheels.
Sadly the internet contains only very few informations and pictures concerning this vehicle;
so it was found e. g. the description of a more powerful version of a La France with more
impressive data:
6 cylinders, 14500ccm cylinder capacity, 105hp at 1300rpm, weight approx. 2,5t.
On an internet site the petrol consumption is specified to approx. 50l per 100km.
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The original
(Picture by kind permission of
Classic Motor Monthly)
www.classicmotor.co.uk/vivela.htm
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The model
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According to the original also the model was provided with a chain drive.
Ditto the steering widely complies with the original.
The laminated spring shock absorber only could be suggested; because of optical reasons an
effective absorption was renounced.
So to speak to the "standard equipment" belongs of course a radio control.
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Front view
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Back view
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For the construction of the model only a few pictures and illustrations were available.
Even the design of the relative simply frame and the chassis therefore proved to be difficult;
several times e. g. the length had to be changed to build a passably scaled model.
At the front axle the steering was problematic because it should to be operated both by the
steering wheel and by the servo (in accordance to the other vehicles too).
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The steering mechanism
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The inner side of the bonnet
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To meet the scale the motor bonnet was to build shorter as the length of a 7 cell accumulator;
this therefore (invisible) sticks out of the bonnet.
For an easy accu change the bonnet is removeable without loosing any screws.
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The steering again is a simplified Ackermann-steering, how described in "Other Projects
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As steering servo this time a small size servo was used. Thus there is adequate room to place
the other components of the radio control (receiver, speed controller and wiring).
In this model for the first time another selfmade drive unit with differential was used (see
"Other Projects").
Contrary to the other models the drive was stiff mounted to the frame, what indeed results into
a significant noise emission.
The semiaxles of the differential are connected to the rear wheels by driving chains; at the
original by this means movements of the rear axle can be compensated.
Both at the original and at the model for spanning of the chains the complete rear axle can be
moved.
The mounted drive unit
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The chain drive
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Simply but effective are the simulated laminated springs:
For this worn out parts were used and the paint completely was removed. Afterwards a chemical
treatment with rust converter was performed which results into a fitting appearance.
The driving property:
After the first laps (and the first loosened screws) it is to call as distinguished.
For the first time a vehicle with differential was built; adequately of course it passes through
the curves.
Considering the relative low weight and the small wheels the model can be driven with the
smallest gear reduction and hence reaches a notable speed (at last it is a racing car).
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The driverīs perspective
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The steering servo is small, but it allows the max. steering angle. Thus in spite of the large
wheel-base the model is very mobile.
Disadvantage:
A standard servo with plastic cog wheels never should be operated without a servosaver; otherwise
it could be damaged if a front wheel runs onto an obstacle.
At this model the protection is realized by an adjustable clamping connection within the
steering mechanism.
And finally we present a
Video of the Nostalgic Racing Car (60s / 3,72MB).
Data of the nostalgic racing car:
| Length: | 48cm |
| Width: | 25cm |
| Heigth (without antenna): | 19cm |
| Weigth (with accumulator): | ca. 4,5kg |
| Number of parts: | not yet counted |
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