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Old 18 May 2019, 14:51   #1
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Country: UK - England
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Trim setting - Brig 500L

Does anybody have a Brig 500L and find that it naturally rises bow high?

I have a Yamaha 50 and itís trimmed all the way down, but when a passenger stands next to be at the helm the stern sinks and it comes off the plane. I can up the refs and get it back on the plane, but not within the speed limit in Poole harbour .

Any thoughts on solutions / similar experiences would be much appreciated.

Thanks
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Old 21 May 2019, 14:55   #2
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Country: UK - England
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Boat name: Lion
Make: Wellcraft,brig450l
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Trim tabs worked a treat on mine
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Old 22 May 2019, 06:27   #3
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Ah, not a bad idea. What ones did you go for?
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Old 05 June 2019, 21:43   #4
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Country: New Zealand
Town: Whakatane
Boat name: Jojosrib
Make: Brig
Length: 6m +
Engine: Yamaha f 130
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Quote:
Originally Posted by wonky View Post
Does anybody have a Brig 500L and find that it naturally rises bow high?

I have a Yamaha 50 and itís trimmed all the way down, but when a passenger stands next to be at the helm the stern sinks and it comes off the plane. I can up the refs and get it back on the plane, but not within the speed limit in Poole harbour .

Any thoughts on solutions / similar experiences would be much appreciated.

Thanks
This happened on a 5 m rib that I had a while ago. Fixed with wedges on the transom.
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Old 06 June 2019, 01:32   #5
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Quote:
Originally Posted by wonky View Post
Does anybody have a Brig 500L and find that it naturally rises bow high?

I have a Yamaha 50 and itís trimmed all the way down, but when a passenger stands next to be at the helm the stern sinks and it comes off the plane. I can up the refs and get it back on the plane, but not within the speed limit in Poole harbour .

Any thoughts on solutions / similar experiences would be much appreciated.

Thanks
Does that happen every time you go out Wonky?
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Old 06 June 2019, 06:00   #6
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Country: UK - Scotland
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Boat name: Skua
Make: Ribcraft
Length: 8m +
Engine: Suzuki df250 4stroke
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Whatís the speed limit in Poole harbour?
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Old 06 June 2019, 06:26   #7
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Country: UK - England
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Originally Posted by wonky View Post
Does anybody have a Brig 500L and find that it naturally rises bow high?

I have a Yamaha 50 and it’s trimmed all the way down, but when a passenger stands next to be at the helm the stern sinks and it comes off the plane. I can up the refs and get it back on the plane, but not within the speed limit in Poole harbour .

Any thoughts on solutions / similar experiences would be much appreciated.

Thanks
This could be a design problem then. Our caravan neighbour on holiday had a brand new Navigator 485 which looks like it has the Falcon 500 tubes that have been shortened by removing the pointy bits (sponsons?).

Fitted with a Suzuki 40 it was running so bow high and low at the stern, following and observing him (+ wife) within Salcombe estuary speed limit I thought water was going to go in over the transom. It didn't look balanced.
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Old 06 June 2019, 06:40   #8
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Whatís the speed limit in Poole harbour?
most of poole is 10knts, my rib won't plane at that - it'll sit on the hump and make lots of noise but not get out of displacement mode, we just run at 7-8 and enjoy the day till out of the harbour
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Old 06 June 2019, 06:52   #9
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most of poole is 10knts, my rib won't plane at that - it'll sit on the hump and make lots of noise but not get out of displacement mode, we just run at 7-8 and enjoy the day till out of the harbour


Thatís what I was getting at. Brigs May well be a bit back heavy I donít know but either way hoping to plane sub 10 knots is optimistic. If it runs well and planes nicely at a reasonable speed then no action required. Chilling out seem the way to go
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Old 06 June 2019, 07:27   #10
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Wow that doesn't sound right, are you sure the engine is fully trimming in?

You can purchase outboard transom wedges which allow for more trimming in.

There are also self levelling trim tabs which are quite inexpensive and easy to fit yourself. I would recommend using the smallest bennetts self levelling trim tabs, these can be setup at three different settings of pressure and would certainly bring your bow down.
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