Adding transom knees

dada73

Junior Member
Joined
May 4, 2023
Messages
11
Boat make
Driver 560 (18ft)
Engines(s)
Yamaha 225 2stroke 6cyl
So I'm planning to reinforce the new (2 years old) dry and stable transom with additional knees.

Reason is the upgrade from a 180kg Yam 4cyl to a 200kg Yam 6cyl.

The space in the back of my 18foot Driver 560 is just as limited as it is with the Phantom 18.

This made me think of using angled knees like the Phantoms have them.

Here's pictures of the mockup made of xps. (Will use Okume aw100 plywood with west system epoxy though).

What are you opinions?

Would that work? How to deal with the sharp angles? What about the inner knees? Better to have only one centered? What about reinforcing the transom to sidewall joint?
 

Attachments

  • 20230909_173152.jpg
    20230909_173152.jpg
    97.2 KB · Views: 69
  • 20230909_173040.jpg
    20230909_173040.jpg
    94.7 KB · Views: 63
  • 20230909_172953.jpg
    20230909_172953.jpg
    105 KB · Views: 60
  • 20230909_173021.jpg
    20230909_173021.jpg
    121.7 KB · Views: 55
Or would you guys opt for a stainless steel reinforcment like this:
 

Attachments

  • WhatsApp Bild 2023-09-11 um 15.07.03.jpg
    WhatsApp Bild 2023-09-11 um 15.07.03.jpg
    76.4 KB · Views: 65
  • WhatsApp Bild 2023-09-11 um 14.55.42.jpg
    WhatsApp Bild 2023-09-11 um 14.55.42.jpg
    89.8 KB · Views: 50
I would much rather prefer the foam knees rather than the stainless b******t. Also the last knee on the side i would bond it to the tub aswell for added support
 

Latest posts

Back
Top