We kept the possibility to have a weight in the very bottom which is easily adjustable in it’s position.
At the same time we improved the way it is it mounted to reduce vibrations by using a carbon weight bridge which is mounted in anti-vibration rubbers.
We also have added 2 more locations for another weight, one underneath the engine and another one underneath the servosaver.
The central weight bridge allows the use of max 3 weights
All weights are mounted as low as possible to improve the center of gravitiy The one-piece plastic radiomount is replaced by a 2-piece aluminium construction. It is lighter than the plastic one, and at the same time it improves the flex characteristics and the accuracy of mounting the radioplate.
The rear bulkheads are now also connected to the rearplate to improve the stiffness as well as reduce vibrations.
The bulkheads are machined excessively to get the perfect balance between weight and strength
A much longer ramp for the roller avoiding locking of the second gear even with excessive wear on the shoes
M4 setscrews for gap adjustment to help keeping the gap constant
2 bearings in the second gear “bell” for better truth of rotation and balance
Easy access for adjustment from the outside
2nd gear adapter is locked in position to avoid binding and deliver constant performance of engine and gearbox
The new tank is more consistent in adjustment no matter if it’s full or almost empty.
The new tank seal keeps a higher pressure and keep things dry and clean
The cap of the tank is higher to allow even faster refueling.
No inserts anymore to keep it simple. Excessive testing of different shapes lead us to this design to have the best balance of front end grip on high as well as low speed and hairpins
This shape has been found to provide the best flex characteristics
The single most important new feature are probably the shock-absorbers. A lot of attention has been payed to minimize friction and jamming.
Testing has also shown that a slightly smaller bore works better.
In the 989 we redesigned the rear flex system. We wanted to have a much lighter and more accurate system. We found a lot of improvemnet with 2 linkages next to the fueltank. Flex or no-flex is only a matter of replacing the insert in the radioplate
In this way it is possible to change heave adjustments more or less independent of roll
As an example it is possible to have a very light roll damping combined with a very high heave damping, something which is not possible with a classic suspension.
The third damper can be used to only alter the damping characteristics without a third spring, but also to add a spring to alter spring rates for heave The front and rear heave sets are available as an option.