Reply
 
Thread Tools Search this Thread
 
Old 17 June 2009, 17:17   #1
Member
 
Country: UK - England
Boat name: Expresso
Make: Ribeye
Length: 5m +
Engine: outboard/petrol/100
Join Date: Jun 2009
Posts: 79
Towing reverberation

Our 6m Ribeye on single axle braked Bramber Trailer has a constant reverbaration [only description I can think of] that runs through the vehicle when towing. It's a sort of wave feel, as though the trailer is trying to push the car and the car is then trying to stop it going forward. Any thoughts from anyone what is causing this? Is it normal - being relatively new to distance towing, I don't have any experience to call on. Is there a cure?
__________________

__________________
Solent Ribman is offline   Reply With Quote
Old 17 June 2009, 18:31   #2
JSP
Member
 
Country: UK - England
Town: Southport
Boat name: Qudos
Make: 5.4 Searider
Length: 5m +
Engine: Yam 115 V4
MMSI: 235068784
Join Date: Sep 2008
Posts: 3,930
I've had a similar ( I think) experiance with a trailer that had to much weight on the hitch.
__________________

__________________
JSP is offline   Reply With Quote
Old 17 June 2009, 20:08   #3
Member
 
Country: UK - England
Town: Near Godalming
Boat name: AJA
Make: Ribeye
Length: 6m +
Engine: Yamaha F150AETX
Join Date: May 2009
Posts: 558
Is there an inexpensive way to check that the wheels are aligned on the trailer?
__________________
neilda is offline   Reply With Quote
Old 18 June 2009, 04:50   #4
Member
 
Country: UK - England
Town: Towcester
Boat name: Treliska
Make: Ribcraft
Length: 6m +
Engine: Outboard 225 Optimax
MMSI: 232009522
Join Date: Feb 2006
Posts: 187
RIBase
Is wht you are describing up and down, left and right or forward and backward?

Up and down tends to be nose weight, often too little, but sometimes too much.
Side to side is also often too little nose weight, improper axle alignment or topo much windage forward on the boat if it only happens at speed.
Forward/backwards sometimes happens with a worn damper on your overrun brakes, but normally you'll start hearing the banging when you brake first.
__________________
Andy_Rs600 is offline   Reply With Quote
Old 18 June 2009, 08:32   #5
Member
 
Country: UK - England
Boat name: Expresso
Make: Ribeye
Length: 5m +
Engine: outboard/petrol/100
Join Date: Jun 2009
Posts: 79
hitch weight too high

I did think there may be an issue one way or another with the hitch weight, but to be honest I would have thought with 300kg of Yam on the back it would be hitch light!
__________________
Solent Ribman is offline   Reply With Quote
Old 18 June 2009, 08:36   #6
JSP
Member
 
Country: UK - England
Town: Southport
Boat name: Qudos
Make: 5.4 Searider
Length: 5m +
Engine: Yam 115 V4
MMSI: 235068784
Join Date: Sep 2008
Posts: 3,930
Quote:
Originally Posted by Solent Ribman View Post
I did think there may be an issue one way or another with the hitch weight, but to be honest I would have thought with 300kg of Yam on the back it would be hitch light!
Easiest guide is to stick the Jockey wheel on some bathroom scales, not perfect but gives you an idea.
__________________
JSP is offline   Reply With Quote
Old 18 June 2009, 11:12   #7
Member
 
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
A look in the mirror while running should tell you if the trailer is actually swaying on you. Too little tongue weight will cause the rear of the trailer to hunt. Too much usually won't cause a problem for the trailer, but lightens the front wheel weight on the tow vehicle (steering gets weird; also causes excessive squat in the back of the TV.)

For the axle alignment, I usually just tape measure from the a known point to a point on the axle: back of the frame rails to the rear spring mount, for example. Then check that the axle is mounted to the center of each spring.


How are your brakes activated? Surge coupler?

I've had a similar problem with hydraulic surge brakes; something set the trailer to surging forward, activating the brakes, which then pulled back, releasing them, then it bounced forwards again starting the cycle over.

Adjusting the brakes a bit looser corrected the problem.


Luck;

jky
__________________
jyasaki is offline   Reply With Quote
Old 18 June 2009, 11:38   #8
RIBnet supporter
 
jambo's Avatar
 
Country: UK - Scotland
Town: Girvan & Tayvallich
Boat name: Breawatch
Make: Ribcraft
Length: 5m +
Engine: Mercury 150 F/stroke
MMSI: ex directory!!
Join Date: Sep 2008
Posts: 5,787
RIBase
[

I've had a similar problem with hydraulic surge brakes; something set the trailer to surging forward, activating the brakes, which then pulled back, releasing them, then it bounced forwards again starting the cycle over.

Adjusting the brakes a bit looser corrected the problem.


Luck;

jky [/QUOTE]

I have the same problem as jky and have just had to live with it unfortunately.

J
__________________
jambo
'Carpe Diem'
Member of the ebay Blue RIB cover club
Member of SABS ( Scottish West Division)
jambo is offline   Reply With Quote
Old 18 June 2009, 17:10   #9
CJL
Member
 
CJL's Avatar
 
Country: UK - England
Town: London
Make: Ribcrafts
Length: 5m +
Engine: 150hp/2x115hp
MMSI: 235090215
Join Date: Oct 2002
Posts: 2,115
RIBase
Send a message via Skype™ to CJL
On small dinghy trailers I've had problems at ahem slightly higer speeds than 60mph but getting the wheels balanced sorted it.

Not sure if it will solve your problem but it may help.

C
__________________
www.northernexposurerescue.org.uk
A registered charity supporting events across England and Wales
Follow us on Vimeo and Facebook
CJL is offline   Reply With Quote
Old 23 June 2009, 04:53   #10
Member
 
Country: Ireland
Town: Dun Laoghaire
Length: 6m +
Join Date: Feb 2007
Posts: 86
Quote:
Originally Posted by Solent Ribman View Post
I did think there may be an issue one way or another with the hitch weight, but to be honest I would have thought with 300kg of Yam on the back it would be hitch light!
You might be too light on the hitch...which causes tail swing. the weight on the ball should be around 50kgs depending on the car..A little more for a big 4x4. Giving you that snaking side to side feeling followed by a jack-knife if you are not very careful.

I suppose the trailer is a 4 wheeler...check the hitch height...If this is wrong this might be causing the front or back axle to bounce off the ground which will give you a wave feeling.. up and down.

However what you describe is more fore and aft pushing/pulling would suggest that the damper (a shock absorber) in the hitch is knackered. This allows the override braking system to spring back and forward...giving you that fore and aft bumping feeling.
__________________

__________________
Tino is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 01:26.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.