The organ have 172 springs :

- 56 springs for the grand-orgue pallets
- 56 springs for the positif pallets
- 30 springs for the pedal pallets
- 30 springs for the pedal mechanism

They are made with 1 mm inox wire, for the mechanism springs and 1,5 mm inox wire for the pallets springs


Having found the good strength by means of a spring of test, this one is reproduced on a paper so that all the springs are identical.

The force required to press down the keys is about 120 grams


I realize at first an elbow in 90 °


The elbow is hung on the spring machine


We turn the crank
After three tours of crank, we obtain the buckle


One spring ...there remains 171 ...