• Hinges for a 'lift off trap-door'

    From Chris Green@21:1/5 to All on Thu Feb 13 11:52:06 2025
    It's me and my little boat again!

    Having once again almost had a nasty accident while accessing the
    engine I've decided I really need to improve the engine access,
    especially as I am getting older and stiffer.

    The engine is under the floor and at present you lift two panels
    (with finger lifter) to get access. The larger panel is about
    1.5 metres by 70cm and is very heavy, especially when trying to
    lift it with just one finger. The panels just rest on a rim of angle,
    they aren't hinged or anything so once lifted up you have to do
    something with them to get them safely out of the way.

    So, I'm thinking that I might replace the two 'lengthwise' panels with
    four 'crosswise' ones which would be about 134cm long by 15cm wide.
    There is a support 'lengthwise' off-centre across the hole so I think
    20mm or so ply should be strong enough, I could add stiffening of some
    sort if necessary.

    I'd like to hinge the panels at one end and have a decent trapdoor ring
    type lifter at the other end. However for doing more than just engine
    checks one needs to take the panels off completely and put them out of
    the way so the hinges need to be 'detachable' in some way. I don't
    think standard 'lift-off' hinges will work, slidng the panels sideways
    to remove them will be awkward and putting them back won't be easy.

    So, what sort of hinges (or other fittings) might do the job? They
    need to be pretty robust and easy to detach when one wants to. I'd be
    ok with some sort of latch one moved before lifting the panel, the
    panels don't have to lift off without extra intervention, in fact it
    might well be a good idea if they don't.

    --
    Chris Green
    ·

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  • From Tricky Dicky@21:1/5 to Chris Green on Thu Feb 13 13:21:46 2025
    Chris Green <cl@isbd.net> wrote:
    It's me and my little boat again!

    Having once again almost had a nasty accident while accessing the
    engine I've decided I really need to improve the engine access,
    especially as I am getting older and stiffer.

    The engine is under the floor and at present you lift two panels
    (with finger lifter) to get access. The larger panel is about
    1.5 metres by 70cm and is very heavy, especially when trying to
    lift it with just one finger. The panels just rest on a rim of angle,
    they aren't hinged or anything so once lifted up you have to do
    something with them to get them safely out of the way.

    So, I'm thinking that I might replace the two 'lengthwise' panels with
    four 'crosswise' ones which would be about 134cm long by 15cm wide.
    There is a support 'lengthwise' off-centre across the hole so I think
    20mm or so ply should be strong enough, I could add stiffening of some
    sort if necessary.

    I'd like to hinge the panels at one end and have a decent trapdoor ring
    type lifter at the other end. However for doing more than just engine
    checks one needs to take the panels off completely and put them out of
    the way so the hinges need to be 'detachable' in some way. I don't
    think standard 'lift-off' hinges will work, slidng the panels sideways
    to remove them will be awkward and putting them back won't be easy.

    So, what sort of hinges (or other fittings) might do the job? They
    need to be pretty robust and easy to detach when one wants to. I'd be
    ok with some sort of latch one moved before lifting the panel, the
    panels don't have to lift off without extra intervention, in fact it
    might well be a good idea if they don't.


    I have used self-latching Blum hinges on some 2.2m x 0.4m doors of 18mm MDF
    and they work quite well. You can get types that swing 110deg. and more
    which in your case would overcome any tendency to swing close on their own. Most of the modern Blum hinges detach from their backplates by flicking a
    small lever at the back if you need to remove the hatches completely.

    https://www.screwfix.com/p/blum-steel-110-concealed-hinges-115mm-2-pack/1964j

    https://www.screwfix.com/p/blum-steel-170-sprung-clip-on-concealed-hinges-140mm-2-pack/14714

    Richard

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  • From No mail@21:1/5 to Chris Green on Thu Feb 13 16:30:19 2025
    Chris Green wrote:
    It's me and my little boat again!

    Having once again almost had a nasty accident while accessing the
    engine I've decided I really need to improve the engine access,
    especially as I am getting older and stiffer.

    The engine is under the floor and at present you lift two panels
    (with finger lifter) to get access. The larger panel is about
    1.5 metres by 70cm and is very heavy, especially when trying to
    lift it with just one finger. The panels just rest on a rim of angle,
    they aren't hinged or anything so once lifted up you have to do
    something with them to get them safely out of the way.

    So, I'm thinking that I might replace the two 'lengthwise' panels with
    four 'crosswise' ones which would be about 134cm long by 15cm wide.
    There is a support 'lengthwise' off-centre across the hole so I think
    20mm or so ply should be strong enough, I could add stiffening of some
    sort if necessary.

    I'd like to hinge the panels at one end and have a decent trapdoor ring
    type lifter at the other end. However for doing more than just engine
    checks one needs to take the panels off completely and put them out of
    the way so the hinges need to be 'detachable' in some way. I don't
    think standard 'lift-off' hinges will work, slidng the panels sideways
    to remove them will be awkward and putting them back won't be easy.

    So, what sort of hinges (or other fittings) might do the job? They
    need to be pretty robust and easy to detach when one wants to. I'd be
    ok with some sort of latch one moved before lifting the panel, the
    panels don't have to lift off without extra intervention, in fact it
    might well be a good idea if they don't.

    Take a standard butt hinge, knock out the pin and replace it with a
    clevis pin (they have an R clip retaining them). Or maybe these: https://www.vital-parts.co.uk/stainless-steel-hinges-869-c.asp, or
    similar. Perhaps https://www.alibaba.com/trade/search?spm=a2700.details.pageModule_fy23_pc_search_bar.keydown__Enter&tab=all&SearchText=loose+pin+hinge
    Search for "loose pin butt hinge"

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  • From Chris Green@21:1/5 to Dicky on Thu Feb 13 17:32:53 2025
    Tricky Dicky <tricky.dicky@sky.com> wrote:
    Chris Green <cl@isbd.net> wrote:
    It's me and my little boat again!

    Having once again almost had a nasty accident while accessing the
    engine I've decided I really need to improve the engine access,
    especially as I am getting older and stiffer.

    The engine is under the floor and at present you lift two panels
    (with finger lifter) to get access. The larger panel is about
    1.5 metres by 70cm and is very heavy, especially when trying to
    lift it with just one finger. The panels just rest on a rim of angle,
    they aren't hinged or anything so once lifted up you have to do
    something with them to get them safely out of the way.

    So, I'm thinking that I might replace the two 'lengthwise' panels with
    four 'crosswise' ones which would be about 134cm long by 15cm wide.
    There is a support 'lengthwise' off-centre across the hole so I think
    20mm or so ply should be strong enough, I could add stiffening of some
    sort if necessary.

    I'd like to hinge the panels at one end and have a decent trapdoor ring type lifter at the other end. However for doing more than just engine checks one needs to take the panels off completely and put them out of
    the way so the hinges need to be 'detachable' in some way. I don't
    think standard 'lift-off' hinges will work, slidng the panels sideways
    to remove them will be awkward and putting them back won't be easy.

    So, what sort of hinges (or other fittings) might do the job? They
    need to be pretty robust and easy to detach when one wants to. I'd be
    ok with some sort of latch one moved before lifting the panel, the
    panels don't have to lift off without extra intervention, in fact it
    might well be a good idea if they don't.


    I have used self-latching Blum hinges on some 2.2m x 0.4m doors of 18mm MDF and they work quite well. You can get types that swing 110deg. and more
    which in your case would overcome any tendency to swing close on their own. Most of the modern Blum hinges detach from their backplates by flicking a small lever at the back if you need to remove the hatches completely.

    https://www.screwfix.com/p/blum-steel-110-concealed-hinges-115mm-2-pack/1964j

    https://www.screwfix.com/p/blum-steel-170-sprung-clip-on-concealed-hinges-140mm-2-pack/14714

    Hmm, I might buy a pair and see how they might work. I'm not quite
    sure how they will fit round the framework that supports the
    'hatches'. Thanks for the idea, I hadn't really considered kitchen
    door type hinges.

    --
    Chris Green
    ·

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  • From Chris Green@21:1/5 to No mail on Thu Feb 13 17:48:57 2025
    No mail <nomail@aolbin.com> wrote:
    Chris Green wrote:
    It's me and my little boat again!

    Having once again almost had a nasty accident while accessing the
    engine I've decided I really need to improve the engine access,
    especially as I am getting older and stiffer.

    The engine is under the floor and at present you lift two panels
    (with finger lifter) to get access. The larger panel is about
    1.5 metres by 70cm and is very heavy, especially when trying to
    lift it with just one finger. The panels just rest on a rim of angle,
    they aren't hinged or anything so once lifted up you have to do
    something with them to get them safely out of the way.

    So, I'm thinking that I might replace the two 'lengthwise' panels with
    four 'crosswise' ones which would be about 134cm long by 15cm wide.
    There is a support 'lengthwise' off-centre across the hole so I think
    20mm or so ply should be strong enough, I could add stiffening of some
    sort if necessary.

    I'd like to hinge the panels at one end and have a decent trapdoor ring type lifter at the other end. However for doing more than just engine checks one needs to take the panels off completely and put them out of
    the way so the hinges need to be 'detachable' in some way. I don't
    think standard 'lift-off' hinges will work, slidng the panels sideways
    to remove them will be awkward and putting them back won't be easy.

    So, what sort of hinges (or other fittings) might do the job? They
    need to be pretty robust and easy to detach when one wants to. I'd be
    ok with some sort of latch one moved before lifting the panel, the
    panels don't have to lift off without extra intervention, in fact it
    might well be a good idea if they don't.

    Take a standard butt hinge, knock out the pin and replace it with a
    clevis pin (they have an R clip retaining them). Or maybe these: https://www.vital-parts.co.uk/stainless-steel-hinges-869-c.asp, or
    similar. Perhaps https://www.alibaba.com/trade/search?spm=a2700.details.pageModule_fy23_pc_search_bar.keydown__Enter&tab=all&SearchText=loose+pin+hinge

    Search for "loose pin butt hinge"

    Yes, that's the most basic and obvious way of doing it isn't it.
    They'd be best mounted with the pin 'down' as it were to keep the
    surface (which is mostly where we sit to eat) fairly flat but most
    hinges like that will go somewhat beyond 90 degrees so that should be
    ok. As you say I can replace the pin with an R-clip and that can have
    a bit of chain or some such to pull it out more easily.

    Or maybe it would be better with pin 'up' so that the panel could be
    put in place and then the pin would slot in fairly easily.

    That's going to be the main issue I think, making it so that whatever connects/disconnects the hinge is reasonably easy to do.

    --
    Chris Green
    ·

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  • From Chris Green@21:1/5 to All on Thu Feb 13 17:57:41 2025
    I just had a thought, thinking about how easy (or not) it will be to
    detach the panel from the hinges when one wants to.

    Can one get fairly robust/heavyweight hinges where one half of the
    hinge is a pin that goes into a hole?

    One side of the hinge would be screwed onto the edge of the fixed
    floor around the hole, then the side which is a pin/rod of some sort
    would be inserted into the edge of the 'trapdoor'. On opening the
    trapdoor it just sits on the pins by gravity, to remove it you just
    lift it off the pins. I guess there could be some sort of locking
    mechanism to keep the pins in place if that seems necessary.

    So, the question is, what's this sort of hinge called? I've seen
    small versions of them used on jewellery type boxes but not larger
    ones. Also, I'm not sure if the exist in a 'one sided' sort of
    version where one side is standard hinge and the other half is the
    pin.

    --
    Chris Green
    ·

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  • From Chris Green@21:1/5 to Chris Green on Thu Feb 13 18:37:11 2025
    Chris Green <cl@isbd.net> wrote:
    I just had a thought, thinking about how easy (or not) it will be to
    detach the panel from the hinges when one wants to.

    Can one get fairly robust/heavyweight hinges where one half of the
    hinge is a pin that goes into a hole?

    One side of the hinge would be screwed onto the edge of the fixed
    floor around the hole, then the side which is a pin/rod of some sort
    would be inserted into the edge of the 'trapdoor'. On opening the
    trapdoor it just sits on the pins by gravity, to remove it you just
    lift it off the pins. I guess there could be some sort of locking
    mechanism to keep the pins in place if that seems necessary.

    So, the question is, what's this sort of hinge called? I've seen
    small versions of them used on jewellery type boxes but not larger
    ones. Also, I'm not sure if the exist in a 'one sided' sort of
    version where one side is standard hinge and the other half is the
    pin.

    It's sort of like a barrel hinge, but not quite.

    --
    Chris Green
    ·

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    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From charles@21:1/5 to Chris Green on Thu Feb 13 20:00:02 2025
    In article <nnq18l-dru8.ln1@q957.zbmc.eu>,
    Chris Green <cl@isbd.net> wrote:
    Chris Green <cl@isbd.net> wrote:
    I just had a thought, thinking about how easy (or not) it will be to
    detach the panel from the hinges when one wants to.

    Can one get fairly robust/heavyweight hinges where one half of the
    hinge is a pin that goes into a hole?

    One side of the hinge would be screwed onto the edge of the fixed
    floor around the hole, then the side which is a pin/rod of some sort
    would be inserted into the edge of the 'trapdoor'. On opening the
    trapdoor it just sits on the pins by gravity, to remove it you just
    lift it off the pins. I guess there could be some sort of locking mechanism to keep the pins in place if that seems necessary.

    So, the question is, what's this sort of hinge called? I've seen
    small versions of them used on jewellery type boxes but not larger
    ones. Also, I'm not sure if the exist in a 'one sided' sort of
    version where one side is standard hinge and the other half is the
    pin.

    It's sort of like a barrel hinge, but not quite.

    On doors often called "Rising Butt"

    --
    from KT24 in Surrey, England - sent from my RISC OS 4té²
    "I'd rather die of exhaustion than die of boredom" Thomas Carlyle

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  • From The Natural Philosopher@21:1/5 to charles on Thu Feb 13 20:10:33 2025
    On 13/02/2025 20:00, charles wrote:
    On doors often called "Rising Butt"
    Sounds frightfully 'gay'
    --
    The theory of Communism may be summed up in one sentence: Abolish all
    private property.

    Karl Marx

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  • From No mail@21:1/5 to Chris Green on Thu Feb 13 20:17:26 2025
    Chris Green wrote:
    I just had a thought, thinking about how easy (or not) it will be to
    detach the panel from the hinges when one wants to.

    Can one get fairly robust/heavyweight hinges where one half of the
    hinge is a pin that goes into a hole?

    One side of the hinge would be screwed onto the edge of the fixed
    floor around the hole, then the side which is a pin/rod of some sort
    would be inserted into the edge of the 'trapdoor'. On opening the
    trapdoor it just sits on the pins by gravity, to remove it you just
    lift it off the pins. I guess there could be some sort of locking
    mechanism to keep the pins in place if that seems necessary.

    So, the question is, what's this sort of hinge called? I've seen
    small versions of them used on jewellery type boxes but not larger
    ones. Also, I'm not sure if the exist in a 'one sided' sort of
    version where one side is standard hinge and the other half is the
    pin.

    I think you mean something like a "lift off case hinge" - I used them
    when I made a flight case for a son's stage piano. Try "lift-off hinge
    flight case"

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Chris Green@21:1/5 to charles on Thu Feb 13 20:29:06 2025
    charles <charles@candehope.me.uk> wrote:
    In article <nnq18l-dru8.ln1@q957.zbmc.eu>,
    Chris Green <cl@isbd.net> wrote:
    Chris Green <cl@isbd.net> wrote:
    I just had a thought, thinking about how easy (or not) it will be to detach the panel from the hinges when one wants to.

    Can one get fairly robust/heavyweight hinges where one half of the
    hinge is a pin that goes into a hole?

    One side of the hinge would be screwed onto the edge of the fixed
    floor around the hole, then the side which is a pin/rod of some sort would be inserted into the edge of the 'trapdoor'. On opening the trapdoor it just sits on the pins by gravity, to remove it you just
    lift it off the pins. I guess there could be some sort of locking mechanism to keep the pins in place if that seems necessary.

    So, the question is, what's this sort of hinge called? I've seen
    small versions of them used on jewellery type boxes but not larger
    ones. Also, I'm not sure if the exist in a 'one sided' sort of
    version where one side is standard hinge and the other half is the
    pin.

    It's sort of like a barrel hinge, but not quite.

    On doors often called "Rising Butt"

    No, that's not what I mean. My description is obviously no good.

    The essential ingredient is that one half of the hinge is a pin that
    inserts into the body of the door. This isn't the hinge's swivel pin.

    --
    Chris Green
    ·

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    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Chris Green@21:1/5 to No mail on Thu Feb 13 20:41:29 2025
    No mail <nomail@aolbin.com> wrote:
    Chris Green wrote:
    I just had a thought, thinking about how easy (or not) it will be to
    detach the panel from the hinges when one wants to.

    Can one get fairly robust/heavyweight hinges where one half of the
    hinge is a pin that goes into a hole?

    One side of the hinge would be screwed onto the edge of the fixed
    floor around the hole, then the side which is a pin/rod of some sort
    would be inserted into the edge of the 'trapdoor'. On opening the
    trapdoor it just sits on the pins by gravity, to remove it you just
    lift it off the pins. I guess there could be some sort of locking mechanism to keep the pins in place if that seems necessary.

    So, the question is, what's this sort of hinge called? I've seen
    small versions of them used on jewellery type boxes but not larger
    ones. Also, I'm not sure if the exist in a 'one sided' sort of
    version where one side is standard hinge and the other half is the
    pin.

    I think you mean something like a "lift off case hinge" - I used them
    when I made a flight case for a son's stage piano. Try "lift-off hinge
    flight case"

    Searching for "lift off case hinge" produces a lot of the type of
    thing I was originally thinking of. They're like ordinary but hinges
    but one half is 'incomplete' so it doesn't go right round the hinge
    pin and can be lifted off when the 'door' is partly open. This may
    well work for me. So "lift off case hinge" is a useful search name.

    It's still not what I have in my mind.

    Think of a hinge where one half is a bit like this:-

    https://www.ebay.co.uk/itm/362938225075?chn=ps&_ul=GB&mkevt=1&mkcid=28&google_free_listing_action=view_item

    but the other half is like a normal butt hinge. Or take a normal butt
    hinge and weld a length of rod to one of its halves, then drill holes
    into the trap-door where the length of rod could be pushed.

    --
    Chris Green
    ·

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  • From fred@21:1/5 to Chris Green on Fri Feb 14 15:41:08 2025
    Chris Green <cl@isbd.net> wrote in news:p0228l-jlv8.ln1@q957.zbmc.eu:

    No mail <nomail@aolbin.com> wrote:
    Chris Green wrote:
    I just had a thought, thinking about how easy (or not) it will be
    to detach the panel from the hinges when one wants to.

    Can one get fairly robust/heavyweight hinges where one half of the
    hinge is a pin that goes into a hole?

    One side of the hinge would be screwed onto the edge of the fixed
    floor around the hole, then the side which is a pin/rod of some
    sort would be inserted into the edge of the 'trapdoor'. On opening
    the trapdoor it just sits on the pins by gravity, to remove it you
    just lift it off the pins. I guess there could be some sort of
    locking mechanism to keep the pins in place if that seems
    necessary.

    So, the question is, what's this sort of hinge called? I've seen
    small versions of them used on jewellery type boxes but not larger
    ones. Also, I'm not sure if the exist in a 'one sided' sort of
    version where one side is standard hinge and the other half is the
    pin.

    I think you mean something like a "lift off case hinge" - I used them
    when I made a flight case for a son's stage piano. Try "lift-off
    hinge flight case"

    Searching for "lift off case hinge" produces a lot of the type of
    thing I was originally thinking of. They're like ordinary but hinges
    but one half is 'incomplete' so it doesn't go right round the hinge
    pin and can be lifted off when the 'door' is partly open. This may
    well work for me. So "lift off case hinge" is a useful search name.

    It's still not what I have in my mind.

    Think of a hinge where one half is a bit like this:-

    https://www.ebay.co.uk/itm/362938225075?chn=ps&_ul=GB&mkevt=1&mkcid
    =28&google_free_listing_action=view_item

    but the other half is like a normal butt hinge. Or take a normal butt
    hinge and weld a length of rod to one of its halves, then drill holes
    into the trap-door where the length of rod could be pushed.


    Not really that robust, I assumed you would want something like a regular
    butt hinge (for robustness) and something that you could perhaps rebate
    into the surface for at least a semi-flush fitting (and close butting of
    your engine hatch timbers).

    I searched for "flat plate lift off hinge" and got a fair few good
    results with this being a good example:

    https://metalhardware.co.uk/product-category/hinges/rising-and-lift-off- hinges/

    Not the cheapest but you get the idea.

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  • From Tim+@21:1/5 to Chris Green on Sat Feb 15 10:52:23 2025
    Chris Green <cl@isbd.net> wrote:
    It's me and my little boat again!

    Having once again almost had a nasty accident while accessing the
    engine I've decided I really need to improve the engine access,
    especially as I am getting older and stiffer.

    The engine is under the floor and at present you lift two panels
    (with finger lifter) to get access. The larger panel is about
    1.5 metres by 70cm and is very heavy, especially when trying to
    lift it with just one finger. The panels just rest on a rim of angle,
    they aren't hinged or anything so once lifted up you have to do
    something with them to get them safely out of the way.

    So, I'm thinking that I might replace the two 'lengthwise' panels with
    four 'crosswise' ones which would be about 134cm long by 15cm wide.
    There is a support 'lengthwise' off-centre across the hole so I think
    20mm or so ply should be strong enough, I could add stiffening of some
    sort if necessary.

    I'd like to hinge the panels at one end and have a decent trapdoor ring
    type lifter at the other end. However for doing more than just engine
    checks one needs to take the panels off completely and put them out of
    the way so the hinges need to be 'detachable' in some way. I don't
    think standard 'lift-off' hinges will work, slidng the panels sideways
    to remove them will be awkward and putting them back won't be easy.

    So, what sort of hinges (or other fittings) might do the job? They
    need to be pretty robust and easy to detach when one wants to. I'd be
    ok with some sort of latch one moved before lifting the panel, the
    panels don't have to lift off without extra intervention, in fact it
    might well be a good idea if they don't.


    Do you really need hinges? Why not just put a finger lifter in each end of
    each board?

    Tim

    --
    Please don't feed the trolls

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  • From Chris Green@21:1/5 to timdownieuk@yahoo.co.youkay on Sat Feb 15 11:32:08 2025
    Tim+ <timdownieuk@yahoo.co.youkay> wrote:
    Chris Green <cl@isbd.net> wrote:
    It's me and my little boat again!

    Having once again almost had a nasty accident while accessing the
    engine I've decided I really need to improve the engine access,
    especially as I am getting older and stiffer.

    The engine is under the floor and at present you lift two panels
    (with finger lifter) to get access. The larger panel is about
    1.5 metres by 70cm and is very heavy, especially when trying to
    lift it with just one finger. The panels just rest on a rim of angle,
    they aren't hinged or anything so once lifted up you have to do
    something with them to get them safely out of the way.

    So, I'm thinking that I might replace the two 'lengthwise' panels with
    four 'crosswise' ones which would be about 134cm long by 15cm wide.
    There is a support 'lengthwise' off-centre across the hole so I think
    20mm or so ply should be strong enough, I could add stiffening of some
    sort if necessary.

    I'd like to hinge the panels at one end and have a decent trapdoor ring type lifter at the other end. However for doing more than just engine checks one needs to take the panels off completely and put them out of
    the way so the hinges need to be 'detachable' in some way. I don't
    think standard 'lift-off' hinges will work, slidng the panels sideways
    to remove them will be awkward and putting them back won't be easy.

    So, what sort of hinges (or other fittings) might do the job? They
    need to be pretty robust and easy to detach when one wants to. I'd be
    ok with some sort of latch one moved before lifting the panel, the
    panels don't have to lift off without extra intervention, in fact it
    might well be a good idea if they don't.


    Do you really need hinges? Why not just put a finger lifter in each end of each board?

    Most times when lifting the 'doors' it's just for daily checks so you
    want to 'open the door' and do checks. A hinged door will be handier
    for this as it will stay in place and can just be lowered afterwards
    without any hassle.

    Though I suppose for the daily inspections one could just lift one and
    put it to one side (on top of the next one).

    So you may be right! :-) I'll have to think about what the daily
    checks need in terms of accessibility to the engine etc. It might be
    that some can be done without engine access, the only one that
    definitely needs it is the dip stick.

    Thanks!

    --
    Chris Green
    ·

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  • From No mail@21:1/5 to Chris Green on Sat Feb 15 13:33:30 2025
    Chris Green wrote:
    Tim+ <timdownieuk@yahoo.co.youkay> wrote:
    Chris Green <cl@isbd.net> wrote:
    It's me and my little boat again!

    Having once again almost had a nasty accident while accessing the
    engine I've decided I really need to improve the engine access,
    especially as I am getting older and stiffer.

    The engine is under the floor and at present you lift two panels
    (with finger lifter) to get access. The larger panel is about
    1.5 metres by 70cm and is very heavy, especially when trying to
    lift it with just one finger. The panels just rest on a rim of angle,
    they aren't hinged or anything so once lifted up you have to do
    something with them to get them safely out of the way.

    So, I'm thinking that I might replace the two 'lengthwise' panels with
    four 'crosswise' ones which would be about 134cm long by 15cm wide.
    There is a support 'lengthwise' off-centre across the hole so I think
    20mm or so ply should be strong enough, I could add stiffening of some
    sort if necessary.

    I'd like to hinge the panels at one end and have a decent trapdoor ring
    type lifter at the other end. However for doing more than just engine
    checks one needs to take the panels off completely and put them out of
    the way so the hinges need to be 'detachable' in some way. I don't
    think standard 'lift-off' hinges will work, slidng the panels sideways
    to remove them will be awkward and putting them back won't be easy.

    So, what sort of hinges (or other fittings) might do the job? They
    need to be pretty robust and easy to detach when one wants to. I'd be
    ok with some sort of latch one moved before lifting the panel, the
    panels don't have to lift off without extra intervention, in fact it
    might well be a good idea if they don't.


    Do you really need hinges? Why not just put a finger lifter in each end of >> each board?

    Most times when lifting the 'doors' it's just for daily checks so you
    want to 'open the door' and do checks. A hinged door will be handier
    for this as it will stay in place and can just be lowered afterwards
    without any hassle.

    Though I suppose for the daily inspections one could just lift one and
    put it to one side (on top of the next one).

    So you may be right! :-) I'll have to think about what the daily
    checks need in terms of accessibility to the engine etc. It might be
    that some can be done without engine access, the only one that
    definitely needs it is the dip stick.

    Thanks!

    Fit a small hatch over the location of the dipstick - and an extension
    to the dipstick if it's out of reach with your arm through the hatch.

    --- SoupGate-Win32 v1.05
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  • From Andy Burns@21:1/5 to Chris Green on Sat Feb 15 14:14:08 2025
    Chris Green wrote:#


    I'd like to hinge the panels at one end and have a decent trapdoor ring
    type lifter at the other end.

    Any good? Seems reasonable for a chandler ... they have lift ring pulls too

    <https://www.gsproducts.co.uk/hatch-hinge-65-74mm/>

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  • From Chris Green@21:1/5 to No mail on Sat Feb 15 15:08:15 2025
    No mail <nomail@aolbin.com> wrote:
    Chris Green wrote:
    Tim+ <timdownieuk@yahoo.co.youkay> wrote:

    Do you really need hinges? Why not just put a finger lifter in each end of >> each board?

    Most times when lifting the 'doors' it's just for daily checks so you
    want to 'open the door' and do checks. A hinged door will be handier
    for this as it will stay in place and can just be lowered afterwards without any hassle.

    Though I suppose for the daily inspections one could just lift one and
    put it to one side (on top of the next one).

    So you may be right! :-) I'll have to think about what the daily
    checks need in terms of accessibility to the engine etc. It might be
    that some can be done without engine access, the only one that
    definitely needs it is the dip stick.

    Thanks!

    Fit a small hatch over the location of the dipstick - and an extension
    to the dipstick if it's out of reach with your arm through the hatch.

    I think this is most of the way to the right answer. See my reply to
    the next in thread. Make the 'big' hatches simply lift off and add
    small access hatches within the big hatch for the daily checks and
    inspections.

    --
    Chris Green
    ·

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  • From Chris Green@21:1/5 to Andy Burns on Sat Feb 15 15:05:22 2025
    Andy Burns <usenet@andyburns.uk> wrote:
    Chris Green wrote:#


    I'd like to hinge the panels at one end and have a decent trapdoor ring type lifter at the other end.

    Any good? Seems reasonable for a chandler ... they have lift ring pulls too

    <https://www.gsproducts.co.uk/hatch-hinge-65-74mm/>

    They would work but they stick up above the surface, not important in
    some places but this is the floor inside the boat so it would be
    annoying at the very least - and there's a rug over it usually! :-)


    However someone has come up with a good solution elsewhere. Make each
    hatch with a 'hatch within a hatch'. The main/big hatch just lifts
    off (no hinges) for when I need to get down and do engine maintenance
    and such. Then there's a little, hinged, hatch in the main lift-off
    hatch which gives access to the daily check things. This seems an
    excellent solution to me.

    --
    Chris Green
    ·

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