Thruster tunnel size 450 Voyager

[ck36]

I plan on replacing my BP1200 thruster and would like to size the replacement prior to haul out. Does anyone know the tunnel diameter for the 450 Voyager? I was considering just replacing the gear box, but when adding up all the costs it looks like replacing it with a new sidepower isn't that much more so I think I'll go that route.

[ck36]

Thinking about this a little further I don't think the actual tunnel diameter matters in this case. The repair shop said they needed it to size the replacement, but the BP1200 fits in a 250mm diam tunnel and has a thrust of 120Kg. A replacement Sidethrust model that fit in a 215mm tunnel (SE130) has a thrust of 130Kg. I could go up to the SE170 with 170Kg thrust that fits in a 250mm tunnel but that would probably be overkill for the 450 Voyager. So if I select the SE130 it will undoubtedly fit within the existing tunnel.

[Sgodfrey]

We installed a vetus bp 150 in the 450 tunnel

[Viper]

Contact Imtra, they'll know the tunnel size of the QL you have as they've been dealing with QL retrofits for years. They'll put together a system based on your vessel and current thruster. I've been through this with them several times over the years.

https://www.imtra.com/products/sleipner/thrusters

[ck36]

Source of the post We installed a vetus bp 150 in the 450 tunnel

Did you notice the difference in thrust (150kg for the Vetus vs 120kg for the BP1200)?

[KyleR]

In my opinion, most thrusters I've seen and dealt with are undersized. I'd go with the most powerful that will fit in the space you have to work with.