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Author Topic: MMM Portgarth build  (Read 179642 times)

Stan

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Re: MMM Portgarth build
« Reply #875 on: November 27, 2017, 09:37:14 PM »

Hi Andy info on magnets please supplier.




Stan.
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Tug-Kenny

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T33cno

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Re: MMM Portgarth build
« Reply #877 on: November 28, 2017, 07:08:28 AM »

I bought a selection to experimenting
Donít know whatís happened to the text  {-)

[font=.SF UI Text][/font][font=.SF UI Text][/font][font=.SF UI Text][/font]N52 Disc Magnets -neodymium Model Wargame Warhammer Base Jewellery Tiny Craft UK[font=.SF UI Text][/font][font=.SF UI Text][/font]https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F401278341435[font=.SF UI Text][/font][font=.SF UI Text][/font][font=.SF UI Text][/font] N52 8mm x 3mm x 1mm thin strong Neodymium block magnets SMALL PKS craft fridge[font=.SF UI Text][/font][font=.SF UI Text][/font]https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F142161378855[font=.SF UI Text][/font][font=.SF UI Text][/font]Round Magnet 15mm x 2mm Rare Earth Neodymium No. 760[font=.SF UI Text][/font][font=.SF UI Text][/font]https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F172257883461[font=.SF UI Text][/font][font=.SF UI Text][/font][font=.SF UI Text][/font]N52 Disc Magnets -neodymium Model Wargame Warhammer Base Jewellery Tiny Craft UK[font=.SF UI Text][/font][font=.SF UI Text][/font]https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F401278341435[font=.SF UI Text][/font][font=.SF UI Text][/font]Round Magnet 15mm x 2mm Rare Earth Neodymium No. 760[font=.SF UI Text][/font][font=.SF UI Text][/font]https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F172257883461
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Tug-Kenny

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Re: MMM Portgarth build
« Reply #878 on: November 28, 2017, 03:39:55 PM »


Neither can I.     :}

ken
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T33cno

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Re: MMM Portgarth build
« Reply #879 on: November 28, 2017, 06:23:48 PM »

These just arrived. Can't believe how strong they are. I think these will do for the roof. £2.99
https://www.ebay.co.uk/itm/Neodymium-Disc-Magnets-5mm-Dia-x-3mm-Thick-Grade-N50-Small-Strong-Round-Magnet/371176559801?ssPageName=STRK%3AMEBIDX%3AIT&var=640325029118&_trksid=p2057872.m2749.l2649


Apologies for the mess in my previous post
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T33cno

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Re: MMM Portgarth build
« Reply #880 on: November 28, 2017, 08:54:01 PM »

It feels a chore after a days work but I need to try get one window per day in the bag
One more and that'll be a quarter done
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derekwarner

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Re: MMM Portgarth build
« Reply #881 on: November 28, 2017, 09:12:50 PM »

Yes Andy, I think large window frames in modern day vessels [being of irregular shape] is a very difficult task to master [especially if you have ~~24 in sets of different shape but all in very close proximity]

Your brass section window frames process is extremely tidy [square/upright/uniform/equal protrusion etc]........& lifelike :-)).....just how will you glaze these?

Derek
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Derek Warner

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T33cno

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Re: MMM Portgarth build
« Reply #882 on: November 28, 2017, 09:33:08 PM »

The easy option would be on the inside but the realistic looking option is to have the glazing flush with the front edge of the frames. I'll not frazzle my brain with that until the time comes. I usually have overcome the hurdles one by one so far, pray may that continue  %%


EDIT and thank you Derek  :-))
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T33cno

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Re: MMM Portgarth build
« Reply #883 on: November 29, 2017, 06:06:17 PM »

2nd delivery and these really are small. I thought I'd been sent an empty envelope initially  {-)


Only 1mm thick but so strong that even at this distance you can see forces at play.
Will be easy to glue in place.


https://www.ebay.co.uk/itm/N52-8mm-x-3mm-x-1mm-thin-strong-Neodymium-block-magnets-SMALL-PKS-craft-fridge/142161378855?ssPageName=STRK%3AMEBIDX%3AIT&var=441230456330&_trksid=p2057872.m2749.l2649

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T33cno

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Re: MMM Portgarth build
« Reply #884 on: November 29, 2017, 09:27:36 PM »

Good news. I've been invited to the works do despite being agency scum  {-)
Plus I'll finish next Thursday until January so more boaty mc boat face time  O0


Just one more of these to build and I can go  :-))
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derekwarner

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Re: MMM Portgarth build
« Reply #885 on: November 29, 2017, 09:38:28 PM »

"Will be easy to glue in place"...

Even after scouring the magnets surface to be glued, the magnetic gauss bond to the adjoining ferrous piece is so strong they tend to overcome the strength of the glued bond and one ultimately is stronger than the other

Result being  <*<............

There are alternate solutions.........Derek
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Derek Warner

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T33cno

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Re: MMM Portgarth build
« Reply #886 on: November 29, 2017, 09:42:28 PM »

Have you tried fusion adhesive? seems to stick anything and extremely strong.
I'd love the other options? :-))


At least one half of the magnet pair will be on the back side of the wood shelf so the magnetism will hold it tighter rather than pull it away. I may manage this on both halves. The ply thickness between will reduce the magnetic strength also.
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derekwarner

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Re: MMM Portgarth build
« Reply #887 on: November 30, 2017, 12:47:21 AM »

Sliding neo magnets to separate is an easy option, separating on from each other by direct force on axis with your hands is literally impossible


Grind a chamfer around the magnet faces......rectangular. round, square .....doesn't matter

Select a nitrile O-Ring to the appropriate size...if the magnet is rectangular, form the O-Ring into an ellipse & tack with superglue....randomly drill half a dozen holes into the parent material......one drop of superglue to hold the magnet stable

Gently flood the cavity created by the O-Ring with a thinned epoxy resin until just below the height of the magnet .....the epoxy will also flood into the holes in the parent material keying the epoxy and the magnet

Post curing, you can remove O-Ring if desired

__________________________________________
In a past life  %) as a contingency, I used such an arrangement on a Guided Missile Launcher on a Commissioned Australian  <*< Frigate
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Derek Warner

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bfgstew

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Re: MMM Portgarth build
« Reply #888 on: November 30, 2017, 09:34:08 AM »

Brian, rather than using magnet on magnet, (very difficult to seperate). Use a small countersunk screw for the magnet to lock onto, a lot easier to seperate. This is how I have the deck on my Granit locked down.


Stewart
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T33cno

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Re: MMM Portgarth build
« Reply #889 on: November 30, 2017, 09:59:30 AM »

Thanks Derek thatís something to chew on
Whoís Brian Stewart? {-)
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bfgstew

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Re: MMM Portgarth build
« Reply #890 on: November 30, 2017, 10:15:36 AM »

Sorry Andy, I have been on the phone/Emailing to a chap named Brian for the last couple of days regarding work, got Brian on the brain............I do apologise :embarrassed:


Stewart
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Stan

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Re: MMM Portgarth build
« Reply #891 on: November 30, 2017, 11:26:24 AM »

HI all I have used magnets  to hold down the full deck and superstructure on the plastic kit PT596 and never had any problem lifting off any of the parts held with magnets. I do agree  that sliding them apart is the best way to separate them but when in place this may not be possible. In my new fishing boat the decks are held in place with magnets again no problem lifting them off.

Stan
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JimG

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Re: MMM Portgarth build
« Reply #892 on: November 30, 2017, 01:56:31 PM »

I have many aircraft with canopies and hatches held in place with magnets. The magnet doesn't come loose if you sink it into the surface so it is flush. Usually glued with either epoxy or superglue and they don't come free, even when glued to foam. Normally using 2 magnets, one each side of the join. If you are finding that the attraction between the magnets is stronger than the glue joint then perhaps you need to use smaller magnets. :D Jim
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nemesis

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Re: MMM Portgarth build
« Reply #893 on: November 30, 2017, 02:08:48 PM »

I tend to use a magnet on one side and a washer on the other, weakens the effect. Still prefer to slide articles apart. nemesis
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Tafelspitz

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Re: MMM Portgarth build
« Reply #894 on: November 30, 2017, 03:20:03 PM »

I used a couple of super magnets to hold the servo plate inside my Imara in place. Works like a charm. I used slow and strong Araldite epoxy to hold the magnets in place.
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T33cno

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Re: MMM Portgarth build
« Reply #895 on: November 30, 2017, 06:46:05 PM »

I'm sure I have enough different strength options to fulfil my needs. These came today and there are 50 here
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T33cno

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Re: MMM Portgarth build
« Reply #896 on: December 01, 2017, 06:30:12 PM »

I'm replicating the grab handles too but I'll not fix them until filling/priming is complete
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Starspider

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Re: MMM Portgarth build
« Reply #897 on: December 01, 2017, 11:07:36 PM »




Nice work Andy very impressive  :-))


Peace colin
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T33cno

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Re: MMM Portgarth build
« Reply #898 on: December 01, 2017, 11:10:17 PM »

Thanks Colin.
I'm glad I decided to fill and prime as I go as it would be a lot to do at the end.
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Thornej

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Re: MMM Portgarth build
« Reply #899 on: December 01, 2017, 11:32:28 PM »

Fantastic work Andy. Iím really enjoying your build.
Great to see a craftsman at work - and what can be done.


Cheers :-))
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Jeff