# Wageningen B-Series Bp-Delta Diagrams Request

Discussion in 'Props' started by hhhhar, Dec 19, 2012.

1. Joined: May 2010
Posts: 14
Likes: 0, Points: 0, Legacy Rep: 10
Location: İzmir Turkiye

### hhhharHarun

I need Wageningen B-6.65 Bp-Delta diagram for a school project.I search the internet but all i can find is Kt-Kq diagram.If anyone has this it will be so helpfull

2. Joined: Jan 2003
Posts: 1,438
Likes: 59, Points: 0, Legacy Rep: 841
Location: Southern England

### Tim BSenior Member

3. Joined: May 2010
Posts: 14
Likes: 0, Points: 0, Legacy Rep: 10
Location: İzmir Turkiye

### hhhharHarun

I have already looked them but like i said these are Kt-Kq diagrams, there are some Bp diagrams avaible but i couldn't able to find Bp diagram for B-6.65 yet

4. Joined: Jan 2003
Posts: 1,438
Likes: 59, Points: 0, Legacy Rep: 841
Location: Southern England

### Tim BSenior Member

5. Joined: May 2010
Posts: 14
Likes: 0, Points: 0, Legacy Rep: 10
Location: İzmir Turkiye

### hhhharHarun

These diagrams were drawn after more than 200 lab test how do you except me to draw them? I know how to design a propeller by using series data and i have already calculated by using Kt-Kq diagrams by i want to crosscheck by using Bp-Delta diagrams

6. Joined: Nov 2011
Posts: 242
Likes: 12, Points: 18, Legacy Rep: 117
Location: New England

### johneckSenior Member

You can create the Bp-d plot using the open water data. You only need a small part near the area of interest for your design. There is not really much point, obviously the data is the same as the open water test data.
I don't think that many people use the Bp-d charts any more since computers have made it so fast and easy to perform calculations. There is regression data for the series and even lifting line and lifting surface calculations run in less time than it takes to hit the <enter> key.
A long time ago it helped to make a good starting guess to reduce iterations and save a lot of time and effort. Now you can just start with 1 and iterate until the optimal solution is found and it still only takes a fraction of a second!

7. Joined: May 2010
Posts: 14
Likes: 0, Points: 0, Legacy Rep: 10
Location: İzmir Turkiye

### hhhharHarun

I know but for this homework i have to design by using wageningen b series data Thanks for helps

8. Joined: Jul 2009
Posts: 369
Likes: 15, Points: 28, Legacy Rep: 199
Location: argentina

### quequenSenior Member

Where can Wageningen B series Bu-d diagrams be found?
Searching the Forum, there are Bp-d and Kt Kq n diagrams by dozen, but not Bu-d
The ones in PYD (original book) are almost illegible...

9. ### Submarine TomPrevious Member

Make them up!

Who will know if there's no information available?

Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.