# KN Calculation

Discussion in 'Stability' started by toy, Oct 6, 2012.

1. Joined: Oct 2012
Posts: 2
Likes: 0, Points: 0, Legacy Rep: 10
Location: sharjah

### toyNew Member

Anybody can help me how to manually calculate/produce KN Values in every Displacement and in every 10 degrees heel increment needed for stability booklet.Thank you.

2. Joined: Jun 2012
Posts: 48
Likes: 0, Points: 0, Legacy Rep: 10
Location: Lagos

Helo Toy, re u studying IIMS course?

3. Joined: Oct 2012
Posts: 2
Likes: 0, Points: 0, Legacy Rep: 10
Location: sharjah

### toyNew Member

Hi Adeyele, planning to make stability booklet.

4. ### chandru447Previous Member

5. Joined: Jun 2012
Posts: 48
Likes: 0, Points: 0, Legacy Rep: 10
Location: Lagos

Helo toy, am nt planing to make any1 but I have a exercise relating to your question.

6. Joined: Sep 2012
Posts: 9
Likes: 0, Points: 0, Legacy Rep: 10
Location: Myanmar

### cyroJunior Member

Find GZ first.We know that relation between GZ=KN-KGsin(theta)..GZ=GMsin(theta) .But it is true for angle between 0and 5degree.7degree is maximum.For larger angle of heel,use Barne's method.

7. Joined: Nov 2009
Posts: 203
Likes: 7, Points: 18, Legacy Rep: 97
Location: Houston

### conceptiaNaval Architect

Normally we use software to calculate KN and we generate GZ curves right? How is the other way working?

8. Joined: Sep 2012
Posts: 9
Likes: 0, Points: 0, Legacy Rep: 10
Location: Myanmar

### cyroJunior Member

Atwood's formula.It will take 4 hr to complete one curve.

9. ### chandru447Previous Member

10. Joined: Nov 2010
Posts: 11
Likes: 2, Points: 0, Legacy Rep: 42
Location: China

### en360Junior Member

Since I use software to calculate KN, forget it

11. Joined: Mar 2013
Posts: 4
Likes: 1, Points: 0, Legacy Rep: 33
Location: England

You need to: