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Repetitions
The use of composite materials has allowed Wessell, Nickel & Gross to design a repetition with features impossible to execute in wood. WNG's heel locating system, integrated button, stop and optional rest cushion would not have been possible if the parts had been made from wood.
A great deal of effort has been put into lightening the repetition. A testament to this fact is its unusual shape, designed entirely for the purpose of reducing mass or shifting mass towards the center of rotation. By reducing the moment of inertia, WNG has reduced the dynamic touch resistance felt by the pianist.
It is important to observe that this design could not have been executed in wood.
The 99mm Standard
The 99mm standard means that there is a 99mm (plus or minus 1mm) distance between the flange center pin and the jack center pin.
With the WNG Composite Repetition, any 99mm repetition can be replicated by selecting the correct flange, jack, heel, and deciding whether or not to include an integrated rest cushion.
Optional Rest Cushion
In the WNG Composite Repetition, the rest cushion is optional. Since the base molding does not include the rest cushion bracket, the default configuration is without a rest cushion. All that is required to integrate a rest cushion into the repetition is to attach the rest cushion bracket and felt. If instead your action design features a rest rail, then during assembly the rest cushion bracket is omitted. Easy!
Nine Different Heels
WNG has designed 9 different heels with heights of 1mm increments. This flexibility can be used to easily adapt WNG repetitions to old pianos. Or, this can be used to improve action geometry.
Precision Locating System for the Heel
WNG has designed precision system into it's repetition base, which allows the heels to be accurately located as required. There are seven slots in the repetition base for front to back location. The corresponding tab on the heel is offset so that two locations are possible for each slot.
With 14 heel locations and 9 different heel heights, there are 126 possible capstan contact point locations.
Reduced Rotating Mass in the Repetition Base
The unusual shape of the WNG repetition results from the design effort to reduce rotating mass.
- - The main beam is lowered to reduce the size and mass of the heel.
- - The balancier post is angled back to move the mass towards the center of rotation.
- - The jack stop is molded into the base and angled back to move the mass towards the center of rotation.
Low Maintenance Repetition
Hard Bushings
Cloth bushings have problems:
- - Cloth bushings are unstable in a changing humidity environment
- - As cloth bushings change, center pin torque changes
- - As pin torque changes so does the touch of the piano
In comparison, hard bushings are quite advantageous:
- - Hard bushings are dimensionally stable as humidity changes
- - When exposed to changing humidity, pin torque change is negligible
- - The change in the touch of a piano is negligible
Test Results: After 18 million blows, pin torque exhibited virtually no change. In extreme environments, from 10% to 90% Equilibrium Moisture Content, pin torque was stable.
Read how Wessell, Nickel & Gross succeeds where Teflon bushings failed...Wide Variety of Flanges
WNG provides appropriate flanges so that the composite repetition is able to attach to a variety of repetition rails.
The available flange designs are: Current Mason & Hamlin, Steinway, Aeolian Mason & Hamlin, Wessell, Nickel & Gross Classic, Renner Short, Renner Long, Knabe T1, Yamaha, and Baldwin.
Three Different Jacks
WNG provides three different jacks for interchangeability with many repetitions.
- Standard Jack: Most commonly used jack in the world.
- Modern Jack: Same as Standard Jack except with a low angle tender
- Classic Jack: Same shape, length and tender as found on WNG Classic actions
Organized into sets for popular pianos
WNG has organized sets of repetitions for a number of popular pianos. Each set includes the appropriate flange, jack, rest cushion choice, heel location and height.
