Landing distance calculation for turboprop?

[Founder]

I was doing a couple of exams today and came across the question of landing distance for a turboprop when the runway is contaminated.

Basic rule is that only 70% should be used for landing distance calculations when rwy is contaminated.

The runway is 2200 m long, I used 2200 x 0,7 = 1540, but the correct answer was 1339... why?

[just_go_to]

Hi there,

You also need to reduce the distance by 15% due to contamination.

Good luck with the exams.

[Founder]

Originally Posted by just_go_to

Hi there,
You also need to reduce the distance by 15% due to contamination.
Good luck with the exams.

ah, I knew that, why didn't I think of it =(

Many thanx for your help =)