The Norfolk BroadsThe Norfolk Broads
Username Password
Norfolk Broads Weather

Mon, 11 Apr 2016 7:20 am BST- Light Rain
5 Day Forecast

Wind 2.0 mph @ 40°
48.0°F/8.89°C Humidity 93% Pressure 29.65 (S)

Welcome to The Norfolk Broads Forum
This is THE Worlds Largest Forum devoted to the Norfolk Broads, here you can discuss issues about the Norfolk Broads. Or just somewhere to chat with others interested in the Norfolk Broads area. In 2015 forum members spent 2,048 days afloat on the Broads

Please Help Support The Norfolk Broads Forum
OR

The Norfolk Broads Forum / General Chat / ASTRAL LIGHT NORFOLK CRUISER
login
join
Graphics Off
Search
Forum Members - Book your Hoseasons holiday today, Just call 0345 498 6296

This is a moderated forum Reply to this DiscussionReply to Discussion | Start new discussionNew Discussion << previous || next >> 
Posted By Discussion Topic: ASTRAL LIGHT NORFOLK CRUISER

Similar Threads That Might Help :
Ex Herbert Woods 'Astral Light' on eBay| Astral Light photos/ for sale| Astral Light Herbert Woods| Astral Light Herbert Woods| ASTRAL LIGHT L995|

-- Page: 1 2

book mark this topic Printer-friendly Version  send this discussion to a friend  new posts last

trishp2926
Oct-16-2013 @ 4:28 PM                           Permalink
reply
edit
profile
send p.m.
River Rat
Posts: 21
Joined: Oct 2013
          

Add To Ignore List
We purchased this boat which was previously a hire craft on the broads.  It was then moved to Swale Marina, a salt water tidal marina but we now want to put into the River Nene in northamptonshire and I have had information that it will sit lower in the water and therefore I just wanted to get some information on this and anything that I need to be aware of.

all advice/info is appreciated as totally new to boating, trying to get out of the rat race somewhat and this seemed to be a good idea!

Kind regards
Trish

16E
Oct-16-2013 @ 5:14 PM                           Permalink
reply
edit
profile
send p.m.
Been Posting For a Long Time
Posts: 1576
Joined: Dec 2007
16E
          

Add To Ignore List
Hi Trish,

Yes it will sit lower in the water, the science says so, salt water is denser than fresh water so the boat floats higher in salt water.  However what the commentator did not say was that this is a tiny amount. We have experienced master mariners on here as members who will know all the calculation but the difference will be minimal.

Having traveled around most of our waterways; inland, estuarial and coastal; salt, brackish and fresh, I have seen Broads boats in all locations.  To the naked eye they all look to float to the same level.  I would say do not worry.

He is probably the same expert who will tell you a horse does not pull a cart.  Again he is correct the horse pushes the collar - the collar pulls the cart.

Mal
16E

There are two rules for sucess in life:

1, Never tell anyone everything you know.

Jeremy-Aslan
Oct-16-2013 @ 5:24 PM                           Permalink
reply
edit
profile
send p.m.
Forum Regular
Posts: 880
Joined: Nov 2011
Jeremy-Aslan
          

Add To Ignore List
Maybe I am one of those 'experts', but perhaps modesty prevents me from being too dogmatic.

Mal is quite correct, the boat will sit a tiny, tiny fraction lower in the water.  A little while ago, on another thread, a couple of people did some calculations for a boat a bit smaller than yours  -  but the principle is the same, as it is mainly related to the draught (which will probably be similar).  If I recall correctly, the two answers they came up with were about 3mm and 4mm lower in fresh than salt water  -  or about the difference that one or two people stepping on board would make.

________________________________________________________
'We demand rigidly defined areas of doubt and uncertainty' (HHGG)

Pauline&Phill
Oct-16-2013 @ 6:15 PM                           Permalink
reply
edit
profile
send p.m.
Harnser Trainer
Posts: 6920
Joined: Nov 2006
Pauline&Phill
          

Add To Ignore List
Given that it was designed to sit in fresh water, there can be no
worries about freeboard on the Nene.
You might look at Northampton Cruising Club, what they don't know
about the Nene is probably not worth knowing

Best wishes,

Pauline

Once we were Rondonay, now we
are simply Brilliant!


Bittern Code 65


This message was edited by Pauline&Phill on Oct-17-13 @ 8:45 AM

trishp2926
Oct-17-2013 @ 8:43 AM                           Permalink
reply
edit
profile
send p.m.
River Rat
Posts: 21
Joined: Oct 2013
          

Add To Ignore List
Thanks for all the info and advice the surveyor made me think we were talking a huge amount so was a bit concerned.

The boat is steadily coming back to life,although still looking a bit sorry for herself, learning at an incredible rate at the mo but getting there.  All advice is very much appreciated!



Kind regards
Trish

650XS
Oct-17-2013 @ 7:57 PM                           Permalink
reply
edit
profile
send p.m.
Lives to Post
Posts: 1072
Joined: Dec 2007
650XS
          

Add To Ignore List
say hello to the nene for me i spent many a year there too..............

i miss the boat rallies just how they should be ...

back in the good ole days

if yer get bored yuo could always got down the middle level .....!!!

i have spent many a trial run on astral ....

spacey boat .............enjoy

www.wayfordmarineservices.com

big mouth, large heart and gut
too....

try tell it how it is .....

mod that...........!!!!

Warp
Oct-17-2013 @ 9:40 PM                           Permalink
reply
edit
profile
send p.m.
Forum Regular
Posts: 220
Joined: Jun 2013
Warp
          

Add To Ignore List
Due to being bored I'm going to pretend I know stuff.

Fresh water weighs 39/40ths of what sea water weighs. Salt water is about 64 lb per cu. ft. and fresh is 62 2/5.

If your boat displaces say 4 tons (however much your boat weighs on dry land) and is maybe 40' long and 11' wide at the waterline perhaps with a fineness coefficient of about 0.8 you might have a waterline area of about 340 sq. ft. (which of course varies by draft but most boats get bigger as you go up their freeboard)

So you would displace 4 x 2240 lb of water which we can say is 8,960 lb meaning 140 cu. ft. salt water or 143 1/2 cu. ft. fresh. A difference of 3 1/2 cu. ft.

So taking the water line area of 340 sq. ft. and moving it enough to displace an extra 3 1/2 cu. ft. of water is:
3.5 / 340 or 7/680th of a foot
or (12 x 7) / 680 = 84/680
or to a sane person about 1/8th of an inch...

So probably not worth worrying about too much. Enjoy the Nene!

Regulo
Oct-17-2013 @ 9:49 PM                           Permalink
reply
edit
profile
send p.m.
Mardles sometimes
Posts: 2611
Joined: Jun 2008
Regulo
          

Add To Ignore List
Blimey! I got lost on "If tap A fills a bath in 5 minutes, and tap B . . ."



Regards, Ray.

If it's neither here, nor there,
then where is it?

trishp2926
Oct-18-2013 @ 8:58 AM                           Permalink
reply
edit
profile
send p.m.
River Rat
Posts: 21
Joined: Oct 2013
          

Add To Ignore List
Hi all

Thanks for all the info, the techy stuff did go over my head however it is still very interesting how it is all calculated.  My main concern was not sinking her.

She hasn't had much attention to her in the last 5 years how she is coming together quite quickly and the rain helped sort out where the leaks were.  Great spacious boat and all the narrowboaters that have come aboard to take a look are well surprised.  I have heard that it will be a cold 'yoghurt pot' as I think they are commonly known as but hopefully with the hot air heating and a massive stove shouldn't be too much of an issue.  

Want to get her back to her former glory as found her on the broads forum L995.  She is currently sporting a red wine colour top but due to partner being an Ipswich fan her colour is changing to Blue!! Compromises I make!!

Keep the info coming on any advice is very gratefully received.

Kind regards
Trish

Pauline&Phill
Oct-18-2013 @ 9:12 AM                           Permalink
reply
edit
profile
send p.m.
Harnser Trainer
Posts: 6920
Joined: Nov 2006
Pauline&Phill
          

Add To Ignore List
You mention heater and a stove. It is essential that, however cold
you get, there is adequate ventilation! Do get a carbon monoxide
alarm, it is cheap and could save your life.  
I think you are probably going to need dehumidifiers too to help with
the condensation that is almost certainly going to be a feature; the
level of comfort will increase by reducing any damp in the air.
What is the headlining like? If you can have an air gap between the
hull and the lining, with, then, insulated lining on boards, you will
notice a difference in warmth and comfort.

Best wishes,

Pauline

Once we were Rondonay, now we
are simply Brilliant!


Bittern Code 65


This message was edited by Pauline&Phill on Oct-18-13 @ 9:14 AM

PAGE: 1 2

Home Photo Gallery Days Afloat Contact Us
Chat Room Downloads Norfolk Broads @ Amazon Make My Logo
Shops & Businesses Members Gear Norfolk Broads @ EBay Holiday Calendar
Pub Guide Tide Tables SOS List Popular Threads
2017 Calendar Contest Make A Donation Links Hireboat Info
Norfolk Broads @ CafePress FAQ Broads Quiz Forum Events
Advertise With Us Forum Shop Boating Bits Stickys and FAQs Boating Bits Hirecraft List

 

 

 



Copyright © 2005 Y2KInternet, All Rights Reserved.