Jump to content

Anyone we know?

GUMPY

By GUMPY
in General Boating

 Share

Featured Posts

Momac Veteran

MomacDonate to Canal World

Posted
Posted (edited)
5 hours ago, Loddon said:

What type of boat is it ? All plastic boats look alike to me ;)

 

Looks like a Sealine S41 

is the name of the boat identified?

Edited by MartynG
Link to comment
Share on other sites
Mike Todd Veteran

Mike ToddDonate to Canal World

Posted
Posted
15 hours ago, Alan de Enfield said:

 

You do realise that some GRP boats can be quite large ;

 

 

British "Hunt Class"

 

Hunt Class Minesweeper / Minehunter - Naval Technology

 

 

 

Russian :

 

Russia will launch the Vladimir Yemelyanov on May 30 claiming the minesweeper to be the world's largest hull made of monolithic fiberglass.

She is being built at the Sredne-Nevsky shipyard in St. Petersburg and is anticipated to be delivered to the Russian Black Sea Fleet in 2020.

Russia plans to build about 40 such vessels - the first, Alexander Obukhov, was delivered in 2016, and the second, Ivan Antonov, was delivered in 2018. Two more of the Alexandrit-class vessels are under construction at the yard.

The ship's monolithic fiberglass hull was formed by vacuum infusion and has a much lower mass than metal. This significantly increases its strength, says the Russian Navy. “Such a body is not afraid of corrosion, and the service life, subject to the norms of operation, is practically unlimited.” 

The ship has a displacement of 890 tons, length of 62 meters (203 feet), width of 10 meters (33 feet), full speed of 16 knots and a crew of 44. To combat mines, she is capable of deploying various types of trawls as well as remote-controlled and autonomous underwater vehicles.

 

Vladimir Yemelyanov minesweeper

Not sure how reducing weight increases strength . . .

Link to comment
Share on other sites
howardang Influencer

howardangDonate to Canal World

Posted
Posted
17 minutes ago, Alan de Enfield said:

Humber Rescue assisted three crew members stranded on the large cruiser

 

https://www.hulldailymail.co.uk/news/hull-east-yorkshire-news/motor-boat-stuck-in-humber-4247162

It's now  reported as having been refloated with no reported issues to the 3 crew on board.  It was "parked on a sandbank just opposite Brough, which is well upstream from the Humber Bridge.  (I live in Brough so on my home territory). I suspect that a lack of local knowledge has played a part, because there are substantial banks in the area which have been apparent for months. At least it gave Humber rescue some practise and I am glad that they have been able to launchOK because since the easing of lockdown there have been a number of cars parked on and around the slipway and in front of their boathouse which have caused them difficulties, despite many notices asking for the are to be kept clear.

 

Howard

 

Howard

Link to comment
Share on other sites
tree monkey Veteran II

tree monkey

Posted
Posted
16 hours ago, Dr Bob said:

...and I worked for BP Chemicals in the 70's developing the resins that we sold to Vosper Thornycroft to build the minehunters. They weren't plastic though as per the one aground above. That spoils the story though.

An uncle of mine worked minehunters during the war, although these were wooden at the time, he got sent to the States to bring one back according to family lore

Link to comment
Share on other sites
Naughty Cal Veteran II

Naughty Cal

Posted
Posted

It is a Sealine S41, S42 or S43 all were based on the same hull.

 

Not sure of the name of it or where it was from.

 

 

16 hours ago, LadyG said:

Is it NaughtyCal?

Certainly not. 

 

Our boat is well afloat in Lincoln at the minute. 

 

received-598195911110170.jpg

  • Greenie 1
Link to comment
Share on other sites
Dr Bob Veteran II

Dr Bob

Posted
Posted
46 minutes ago, MartynG said:

http://abpnotify.co.uk/AbpPublishedDocuments/_Upper Humber Bi-Monthly - June 2020.pdf

The chart  indicates the channel - not sure  where the boat was exactly but he might  be forgiven  being slightly off the channel  ?

No. You shouldnt go aground. ? That's what charts are for! Need to be able to read them and be able to use them when your chart plotter goes tits up.

In all our sailing, we only went aground twice - once when racing and we took the chance over a sand bank on a rising tide that we would just miss the bottom (with a 2 metre keel) - we didnt and got stuck for 10 mins. The second time was on my yachtmaster exam prep week where we had to work out the depth of the keel of the yacht so purposely went aground on a rising tide to calculate the draught.

Link to comment
Share on other sites
howardang Influencer

howardangDonate to Canal World

Posted
Posted
1 hour ago, MartynG said:

http://abpnotify.co.uk/AbpPublishedDocuments/_Upper Humber Bi-Monthly - June 2020.pdf

The chart  indicates the channel - not sure  where the boat was exactly but he might  be forgiven  being slightly off the channel  ?

Why on earth should he/she be forgiven for being slightly  out of the channel? The charts are published so that vessels can navigate properly, and they are updated frequently - the channels are surveyed nearly every day by ABP hydrographic department launches, the charts are amended and ABP alter light float/buoyage accordingly as required. 

 

Howard

Link to comment
Share on other sites
Momac Veteran

MomacDonate to Canal World

Posted
Posted
51 minutes ago, howardang said:

Why on earth should he/she be forgiven for being slightly  out of the channel? The charts are published so that vessels can navigate properly, and they are updated frequently - the channels are surveyed nearly every day by ABP hydrographic department launches, the charts are amended and ABP alter light float/buoyage accordingly as required. 

 

Howard

Maybe the channel has moved and the floats have not?

 

It's possible. There has been a lot of rain so the channel might have changed quickly.

 

 

Link to comment
Share on other sites
LadyG Veteran II

LadyGDonate to Canal World

Posted
Posted
18 minutes ago, MartynG said:

Maybe the channel has moved and the floats have not?

 

It's possible. There has been a lot of rain so the channel might have changed quickly.

 

 

An echo sounder or fishfinder might help.

Link to comment
Share on other sites
Nightwatch Veteran II

NightwatchDonate to Canal World

Posted
Posted
22 hours ago, Alan de Enfield said:

 

You do realise that some GRP boats can be quite large ;

 

 

British "Hunt Class"

 

Hunt Class Minesweeper / Minehunter - Naval Technology

 

 

 

Russian :

 

Russia will launch the Vladimir Yemelyanov on May 30 claiming the minesweeper to be the world's largest hull made of monolithic fiberglass.

She is being built at the Sredne-Nevsky shipyard in St. Petersburg and is anticipated to be delivered to the Russian Black Sea Fleet in 2020.

Russia plans to build about 40 such vessels - the first, Alexander Obukhov, was delivered in 2016, and the second, Ivan Antonov, was delivered in 2018. Two more of the Alexandrit-class vessels are under construction at the yard.

The ship's monolithic fiberglass hull was formed by vacuum infusion and has a much lower mass than metal. This significantly increases its strength, says the Russian Navy. “Such a body is not afraid of corrosion, and the service life, subject to the norms of operation, is practically unlimited.” 

The ship has a displacement of 890 tons, length of 62 meters (203 feet), width of 10 meters (33 feet), full speed of 16 knots and a crew of 44. To combat mines, she is capable of deploying various types of trawls as well as remote-controlled and autonomous underwater vehicles.

 

Vladimir Yemelyanov minesweeper

Got girlie buttons!

Link to comment
Share on other sites
TheBiscuits Veteran II

TheBiscuits

Posted
Posted
6 hours ago, Mike Todd said:

Not sure how reducing weight increases strength . . .

 

Study vacuum resin injection and you'll find out.  It's a very clever technique for making huge lumps of fibreglass one off mouldings.

 

Unlike steel where thicker is stronger, you get way more strength for less resin and mat if you force the resin into even the tiniest air gaps.  A paintbrush applied resin just can't compete.

Link to comment
Share on other sites
Dr Bob Veteran II

Dr Bob

Posted
Posted
3 minutes ago, TheBiscuits said:

 

Study vacuum resin injection and you'll find out.  It's a very clever technique for making huge lumps of fibreglass one off mouldings.

 

Unlike steel where thicker is stronger, you get way more strength for less resin and mat if you force the resin into even the tiniest air gaps.  A paintbrush applied resin just can't compete.

Also its about resin/glass ratio as well. By using woven rovings you can get to 60% glass:resin but this can get up to 70% if you use vacuum resin injection which is what these thick sections use. The final strength of the laminate approaches that of the fibre (glass is very strong) but even better when you start using Kevlar etc. 

Link to comment
Share on other sites
Mike Todd Veteran

Mike ToddDonate to Canal World

Posted
Posted
1 hour ago, TheBiscuits said:

 

Study vacuum resin injection and you'll find out.  It's a very clever technique for making huge lumps of fibreglass one off mouldings.

 

Unlike steel where thicker is stronger, you get way more strength for less resin and mat if you force the resin into even the tiniest air gaps.  A paintbrush applied resin just can't compete.

Weight and Strength may be correlated but not causally.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.