There
is one thing which I would like to apologise for at this juncture.
In our last issue, my colleague Aspi Bhathena who covered the media
ride and launch of the Victor stated that the frame of the new bike
was of the single downtube cradle frame but this is not correct. The
word cradle was the offending part and I would like to place the record
straight by stating the Victor employs a single downtube which uses
the engine as a stressed member of the frame. It might look as if
it is a slightly updated version of the basic AX100/Supra/Samurai/Shogun/Shaolin
frame and to an extent that is true but there has been a great deal
of work done with regard to wheelbase lengths, steering angle, rider
ergonomics, ride and handling to make it a completely new design.
Using
Pro Engineer and 3D software, a separate team worked on not just frame
and suspension but also rider comfort and ergonomics. Digital mannequins
were employed to get the Indian male/female and child forms correct
for safety, placement, weight, etc. Using a host of accelerometer
probes on their test riders and making them run on the Belgian pave
tracks, it was possible to monitor g-force and its direction of movement
and suspension travel and frequency. With instrumentation and other
video facilities, it took two solid months of testing to get the front
and rear suspension rates perfectly matched. There is a sort of stomach
churning feel which manifests itself on some bikes at a certain frequency
and this they wanted to avoid at all cost.
Arvind Pangaonkar and his band of race mechanics worked flat out to
get the damping values matched to the road response from the front
telescopic forks (supplied by Gabriel) while also keeping in mind
the high ride
quality which was their project requirement. At the rear the shocks
(Gabriel or Armstrong) employ triple rated springs. Harne stated that
at the rear load carrying was of the essence and compression damping
roll was less critical but spring rating was far more important, hence
the triple rated springs. In contrast up front both compression and
expansion damping are critical factors and his team worked closely
with Gabriel to develop the telescopic forks.
The wheelbase was finalised at the concept stage itself and the swingarm
was always designed to be of a pretty short length so as to afford
strength without much weight.
Ample NISA and ANSYS software was employed by the FEM group working
on the frame design to keep bending (left to right and vice versa)
and twisting (front to rear) forces to a tolerable level for a flex
free unit. The box-section swingarm helps provide the strength which
is so crucial under hard cornering while the front downtube is swaged
(flattened) as you can see for the same purpose of imparting strength.
Sadly TVS didn't think about a disc brake yet again, making do with
a 130mm dia drum in front and 110mm dia drum at the rear. The Victor
runs on newly developed TVS Srichakra tyres which contribute their
own to making a good product even better.
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