Gordmac

Thanks, pencilled in to arrive Monday, chickened out of taking her home by sea, best part of 300nm including canal. 

Missing galley module which I will need to sort something for. Accommodation is a bit basic but two single bunks rather than a double which is a plus, no mattresses though! I have always liked the Botnias, plusher Targa a lot more money and hard to find. The way things are at the moment boats are very hard to get and don't hang around for long. 

On 2/16/2021 at 6:23 PM, Odyssey said:

@Gordmac

 

suggestion for you. Nice boats, lots is fishing room good cabin too. 
 

Up in Shetland though...

 

 

Have come to an agreement for buying this, thanks for bringing her to my attention.

10 hours ago, JonC said:

Prices are through the roof at the moment, best bet is to look further afield like you did. There are some bargains to be had in France it seems. 

Non UK boats are now +20% VAT, makes anything I was looking at way overpriced.

As in vehicle structures.

22 hours ago, GPSguru said:

@JonC, @Andy135 , @suzook12 , @Geoff

 

Here you go............

Decelerating mass is almost a sinusoidal function, which is why it is similar to wave mass calculation.

u(x, t) = 2a²·sech²(a(x + 4a²t))

u is the vertical displacement from equilibrium, t is time, x is horizontal distance and v is velocity,  sech(z) is the hyperbolic secant function and is equal to 2/(exp(z)+exp(−z)

 

Something using hyperbolic functions, not too common! Used to teach shear diffusion that included them, too hard for the students so we dropped it. Not that I can remember any of it now.

From what I can remember from when I towed a fair bit the hitch damper was just that, stopped the trailer from hammering into the towbar under braking by damping the movement.

Botnia Tarfish

What makes you say there is a one ton braking force? Not often you would be looking for 1g deceleration. Thing about levers is to get a lot of leverage you need a lot of movement. Drum brake normally have a self servo action on at least one shoe which increases the braking considerably. Servos did exist before discs but that made them necessary.

Going to Shetland to look at one, probably next week. It is getting some work done at the moment.

Legally the car being towed is a trailer and will need brakes to be legal if over 750kg. They generally run on their own wheels.

There is next to no weight in a bike, won't need a lot of force at the disco work compared to a trailer.

Had a look but a few things I wasn't quite happy with. Boat is listed as sold.

Keep to the deep wet bits!

Don't be afraid to ask for help and advice from people who actually know. Can be difficult to identify those from the ones who think they know though.

9 hours ago, JDP said:

Galvanised break callipers, with cables to a piston that moves and pulls the breaks when you break, much like drums . Like suzook mentioned though, the disk that comes in contact with the pads will get a light coat of rust. However spraying the breaks with saltaway or any other saltwater remover stops this and gives a coating to stop rust. Also if you dont use any of these cleaning products, simply using the breaks removes that coating of rust very quickly. Ive only ever needed to replace disk pads and cables in the last 20+ years of towing boats this side of the pond. My boats in the UK didn't have braked trailers but in saying that most were on moorings.

We also need to have Ellectric break away breaks that will break the trailer if it comes unattched from the tow vehicle but only in rigs over 2 tons.

They are mechanically operated then. I wouldn't think you would get much braking with mechanically operated disc brakes without some sort of assistance. Is there a solenoid helping?

You see motorhomes towing cars, they must have some sort of legal way of operating the car brakes.

What operates the disc brakes on the trailer? When they started fitting disc brakes to cars they had to fit servos to get the pedal force down.

I don't think it would fire at all with a faulty crank sensor, not sure about cam sensor, if it has one. Presumably those engines sense being cold and overfuel on start? I wonder if it thinks it is warm?

Thanks but way over and way way over budget!

Thanks for the replies. The boat is nowhere near new. I don't think the engine has a timing belt.

I am wondering how much corrosion might have occurred in the coolers if the anodes haven't been changed. I suppose a proper mechanical survey is the answer if I could find a mechanic with Yanmar experience.

The Yanmar engines seem to have five anodes in the raw water system, I don't think they have been checked for several years, how much of a problem is that likely to be?

Fill holes with epoxy and gouges with gellcoat filler?

Looking at a boat (Rodman or similar thread) with twin 4cyl Yanmars, anything to look out for? Present owner has had the boat for about 3 years/550 hours, not sure the maintenance has been great. I think there are 5 anodes in the raw water system, I doubt they have been looked at. How much of a problem could that be?

Thanks in advance!

E85, that's hand sanitizer! Porsche are developing synthetic petrol to keep their sports cars alive. Maybe that's the future for marine petrol?

Would a fuel stabiliser sort the storage issue?

It is interesting that the sportfisher, for want of a better description, is common in Europe but not here. For some reason the UK seems to go for sports boats.

I don't think boaty mcboatface has been taken.

Thanks.

There is a Faeton 910 Moraga for sale not too far away, anyone know anything about them? Twin Yanmar on shafts. Seems even rarer than a Starfisher!