Comparison of 6 drops until fail

Here are the curves of 6 drops of an old semistatic rope.
Drop test according to the standard. 2 meters with 100 kg. Repeated until fail.
The rope failed in the 6th drop.

I tried to scale it and adapt it so it is a bit comparable.

The energy is always the same (in the first 5 drops). The peak is increasing as the elasticity plus friction in the knot goes down.

In the 6th drop the peak reached the breaking load of the rope. Some of the energy "landed on the ground"

Here is another rope: 5 falls, no fail. Similar pattern.

First tests on my new drop test machine

The drop test machine is finished and I did the first drop tests.

And  more tests followed ...

And here are the numbers:

 The left 2 rows are the ropes Nr. 1 and 2 that held 5 drops, then comes rope Nr. 3 held two drops and broke at the 3rd drop. The ropes Nr. 4,5,6 held 1 drop and broke at the second.

The blue diamonds are the 60-cm drop test to measure the peak load. It shall not exceed 6 kN. They all would have passed that test.
The red squares are the first drtop: 2 meters, factor 1, attachment ate figure of 8 knots. The standard does not require measuring the peak load, but I did it. It is around 10 kN in the old ropes and 12 kN in the "new" (unused) rope.

Rope 1 amd 2 would have passed all tests.

But very important to know: Only the rope Nr. 1 is younger than the Eurostandard, the other ropes had been produced before.

And the standard is NOT matching the reality. The purpose of a standard is to make sure that ropes are fit for purpose.
And they are. Even if they hold only 1 drop, they for sure are fit for purpose. 

Good news for my theory:

Age is no discard criterion.