Deck compression from mast

Refueler

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My Sunrider 25 has always been subject = like most 20 - 80's boats- of deck compression when mast stepped. In fact my boat has a good indicator of when mast is tensioned OK - whether bog door opens easily.

Because of the SR25 tendency to carry weather helm, last 2 years I have stepped mast as far forward on the deck blade as possible. Mastfoot is the inverted U foot that then has bolt through a vertical blade on deck. That blade has 5 possible bolt positions ...

As part of my 'exercise' to start walking again after fracturing vertebrae ... I take short slow 'walks' in garden. Other day I decided to push the envelope and 'hobbled' down to my pontoon and boat. I could not climb on board of course but while resting to start the 'walk' back to house - I looked her over.

It was quite obvious that there was compression of the deck from the mast. Not a great amount ... but the eye is remarkably adept at seeing such.

Until I can actually move around fully it will have to stay as is. It looks like stepping so far fwd on the blade - may be pressing on the fwd edge of the doubling pad under deck and causing fwd edge to be pushed down. Hopefully later returning mast to a position aft may solve it.

To add extra support underdeck may not be so easy as a full transverse bulkhead 'beam' already is there.... with no signs of crack / breakage.
 
My Sunrider 25 has always been subject = like most 20 - 80's boats- of deck compression when mast stepped. In fact my boat has a good indicator of when mast is tensioned OK - whether bog door opens easily.

Because of the SR25 tendency to carry weather helm, last 2 years I have stepped mast as far forward on the deck blade as possible. Mastfoot is the inverted U foot that then has bolt through a vertical blade on deck. That blade has 5 possible bolt positions ...

As part of my 'exercise' to start walking again after fracturing vertebrae ... I take short slow 'walks' in garden. Other day I decided to push the envelope and 'hobbled' down to my pontoon and boat. I could not climb on board of course but while resting to start the 'walk' back to house - I looked her over.

It was quite obvious that there was compression of the deck from the mast. Not a great amount ... but the eye is remarkably adept at seeing such.

Until I can actually move around fully it will have to stay as is. It looks like stepping so far fwd on the blade - may be pressing on the fwd edge of the doubling pad under deck and causing fwd edge to be pushed down. Hopefully later returning mast to a position aft may solve it.

To add extra support underdeck may not be so easy as a full transverse bulkhead 'beam' already is there.... with no signs of crack / breakage.
Can't really comment on your deck compression. It's a common problem. But I am sorry to learn of your fractured vertebrae - been there, done that, and if you're as fortunate as me, you'll make a full recovery. Good luck.
 
Can't really comment on your deck compression. It's a common problem. But I am sorry to learn of your fractured vertebrae - been there, done that, and if you're as fortunate as me, you'll make a full recovery. Good luck.

Yep old boat problem ...... luckily not being a high stressed race boat - I can move mast foot aft and live with it ....

Spine ? Tks and so far things are slowly improving ...
 
Can't really comment on your deck compression. It's a common problem. But I am sorry to learn of your fractured vertebrae - been there, done that, and if you're as fortunate as me, you'll make a full recovery. Good luck.
What treatment did you have for the fractured vertebrae?
 
What treatment did you have for the fractured vertebrae?

They 'drilled' 5mm hole in back ... inserted a tube with 'balloon' into the fracture so another tube could then inject 'glue' to weld the vertebrae together.
Withdraw 'balloon' ... and let set.

I now have 2 months of not stressing / twisting the repair while bone reforms.

Latvia has a 'semi' form of NHS ..... I had choice of the old way ...

cast, strapped and pray all set correct .... govt pays
or
special cast unit and again pray all sets correct ... govt subsidised but I still pay 600 euros
or
the above operation with very high probability of success ... but Govt does not pay ... cost 2630 euros.

But all hospital costs are by govt .... so free.
 
They 'drilled' 5mm hole in back ... inserted a tube with 'balloon' into the fracture so another tube could then inject 'glue' to weld the vertebrae together.
Withdraw 'balloon' ... and let set.

I now have 2 months of not stressing / twisting the repair while bone reforms.

Latvia has a 'semi' form of NHS ..... I had choice of the old way ...

cast, strapped and pray all set correct .... govt pays
or
special cast unit and again pray all sets correct ... govt subsidised but I still pay 600 euros
or
the above operation with very high probability of success ... but Govt does not pay ... cost 2630 euros.

But all hospital costs are by govt .... so free.
Well I hope it proves to be entirely successful.

My interest derives from an MRI scan I had 8 months ago which showed I have a stress fracture at T12. I was told it would eventually heal itself but it seems to be taking a long time and I was wondering whether there might be some procedure that would speed it up.

Apologies. I am drifting the thread.
 
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Well I hope it proves to be entirely successful.

My interest derives from an MRI scan I had 8 months ago which showed I have a stress fracture at T12. I was told it would eventually heal itself but it seems to be taking a long time and I was wondering whether there might be some procedure that would speed it up.

Apologies. I am drifting the thread.

Just a little addition ...

The surgeon made it plain that I was lucky that I did not delay going to hospital. My vertebrae had not 'moved / misaligned' and also not ground .... it would be a straight forward welding op.
If I had waited - then it could be harder ....
 
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