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Old 04-01-2012, 09:00 PM   #1
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Slipstream, slow progress

Id be interested in any history on my boat. I have a good idea thanks to PCM but anything extra may be of help.

She might have been previously known as MR MAKO and was Steven Kings 2nd stepped hull Scorpion.

I bought the boat, firmly in the knowledge it had been holed and there was some apparent delamination. The extent of which was all a little unknown.

Ive finally taken the plung and dug out the power tools
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Old 04-01-2012, 09:20 PM   #2
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Some additional mahogony stringers have been stuck in middle locker, plus some strange bits of plastic looking stuff which appeared to be silkaflexed to deck. I wasnt happy with the quality of the work and the wood kinda defeated the no wood boat concept Scorpion brag about

Wanted to re-instate bow tank, however as it fills about 1/2 the underdeck, I decided to conduct a little exploration.

I drilled a hole into the tank bulkhead and found a bit of a mess.
Stringers in the tank look in good condition, but the 2nd baffle/bulkhead looked poorly repaired. It looks like plastic but is infact fibreglass sheet cut into strips and silkflexed on to form structure!!!!

The 1st picture show looking into tank through aft tank bulkhead.
2nd picture shows middle baffle in ballast tank
3rd picture shows the roof of the tank, the plasticy stuff appears to be proping the roof of the tank up. Looking inbetween tank and deck is 10-20mm gap, this also has the plasticy stuff on top of tank too
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Old 04-01-2012, 09:29 PM   #3
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The tank has been badly repaired, its obviously the deck and tank have been cut, to get into them. Hand painted deck and more strange bits of plastic.

Today I opened it up to allow me access to repair properly

Picture 1 shows the cut made through deck..
Pic2 shows the deck up and top of ballast tank. Shows how bloody big it is too
Pic3 shows a nice deck cross member, the water tank goes right back to the edge of lewmar hatch
pic4 shows the underside of the deck, some wood and more strip stuff has been used to prop the deck up on the tank. I am hoping someone can tell me what the holes in deck are inbetween two white strips, it looks to me like unsoaked cloth, and around this ares there is no foam core and the deck is about 5mm thick

The tank has been glassed quite tidily from this side
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Old 04-01-2012, 09:38 PM   #4
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My intention is to rip the top of the tank out, and get to the bottom of the boat, if the original stringers are good, I want to leave them in place but re-inforce around the bottom of the boat.

Comparing to my other Scorpion, it can be seen she is considerably thinner down below. But the standard ones do not have stringers forward of the fuel tank bulkhead, which is approx at the front edge of the console.

My idea was to bed balsa down inbetween the stringers, right from the front of the boat, back to tank bulkhead, then glass over. Anyone rekon this seems a good plan??
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Old 04-01-2012, 10:05 PM   #5
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Slipstream

i think it was bob nurses from lymington until recently,think he raced it at the lymington chalenge in 09
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Old 04-01-2012, 10:16 PM   #6
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i think it was bob nurses from lymington until recently,think he raced it at the lymington chalenge in 09
Yep, thats who I bought it off of, it does shift
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Old 04-01-2012, 11:15 PM   #7
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Good man!! That'll be a great project, there's almost always some amazing suprises to be found, especially with race boats!

Best of luck with her and keep us up to date!

Cheers, James
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Old 05-01-2012, 12:57 PM   #8
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The wood in the area between fwd f/tank bulkhead and the aft ballast tank bhd have been added and are not from the original repair done by scorpion when the boat was holed off bournemouth during a brass monkey race.
i would presume they were added when some repairs were done to the ballast tank by persons unknown, these could also be to some extent the cause of the concave pull on the exterior off the hull.
without looking at the underside off the deck and the photos arent to clear the hole maybe cores from holesaw cuts stuck back in place when some ones been exploring the b/tank,
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Old 05-01-2012, 02:28 PM   #9
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I intend to get the roof off the tank, to explore the hull further. Leave the horizontal bulk heads in place for rigidity and Remove any bits of wood and wooden stringers.

Pete, hopefully this won't interfere with your work?
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Old 13-02-2012, 01:47 PM   #10
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some more slow progress. The hull forward of fuel tank bulkhead is now getting stripped out.

Pictures show all longitudes being removed, then 2nd bulkhead/tank baffle is taken out as it was part grp part perspex. The original longitudes were very wobbly, didnt line up, wernt square, made of grp over foam and formed plastic, tabbed in with glass. I could easily penetrate the top surface with a flat bladed screwdriver and my body weight, very unlikely to be original Scorpion.

Currently the bow tank roof, which sits below the deck level and is cored, is still in place, as is bow tank 1st bulkhead(most aft in lewmar hatch) and 3rd bulkhead, this is to maintain strength for the tow to the fibreglass workshop

I Intend to remove all bow tank upto 3rd bulkhead, have a hull depression pressed out and then re-instate the locker like a standard Scorpio with some longitudes and hopefully some extra core along keel line to increase the race boat layup.

I gave up guessing the size of the bow ballast tank, originally I would say the front tank was approx 100litres and the larger section aft atleast double that
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Old 13-02-2012, 01:49 PM   #11
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Old 14-02-2012, 09:51 PM   #12
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That looks like a good project!

I can't help with the history of that boat but I do know that Scorpion have got some useful new data on the stepped hull from their Greek owners/racers. I would suggest that a call to Lymington HQ & a conversation about the engine position on the transom would be worthwhile.
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Old 16-02-2012, 10:39 AM   #13
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That looks like a good project!

I can't help with the history of that boat but I do know that Scorpion have got some useful new data on the stepped hull from their Greek owners/racers. I would suggest that a call to Lymington HQ & a conversation about the engine position on the transom would be worthwhile.
,
Thanks Brambles.... I have tried Scorpion several times, initially it was to assitain what was original build and what was superglued in after, not had a huge amount of luck on the plans or history, other than here say.

Scorpion are fitting GILL brackets on most stepped hull 8.1 and 8.5m now, appparently to make them faster and riggable with a single engine as agains the expense of two, and I was also told to make them less of a handful, however shifting weight aft doesnt make a boat less of a handful in my head, so still tryinh to work that bit out.

Most likely I will move the motor back on some form of bracket, but I am still undecided. It would negate the need to move the console forward to get an extra set of seats in
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Old 16-02-2012, 08:42 PM   #14
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Thanks Brambles.... I have tried Scorpion several times, initially it was to assitain what was original build and what was superglued in after, not had a huge amount of luck on the plans or history, other than here say.
That's a shame, I'm sure that Graham Jelley would know but he has retired to the south west.

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Scorpion are fitting GILL brackets on most stepped hull 8.1 and 8.5m now, appparently to make them faster and riggable with a single engine as agains the expense of two, and I was also told to make them less of a handful, however shifting weight aft doesnt make a boat less of a handful in my head, so still tryinh to work that bit out.
I thought they have changed the transom mould to move the engine back. I certainly haven't seen any gill brackets.

The positive feedback on shifting the engine back came from the Greek Scorpion race team who won the single engine class in the rib racing championship. Maybe the Greek Scorpion agents who rigged the boat can can give you some more info www.ribcomarine.com
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Old 17-02-2012, 11:37 AM   #15
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OK gents... Im being given the run around about resins. Original glassers that worked on my boat all insist it was laid in derakane and I trust them. Scorpion dont really remember, but it think its derakane but dont know why as this resin is typically used in the tanks for chemical resistance. The UK distributer for Derakane insists the boat isnt derakane and is a Scott badder vinylester.

SO what to repair in?? Reading on other forums, most people seem to insist that vinylester doesnt stick to vinylester to great. The distributer suggests AME6000 T35, as used by pascoe and sunseeker, OR I presume my other option would be to splash out for the epoxys. With approx 25kg of resin needed £100 a drum is alot cheaper than £300, but I want the boat to be as strong as possible, and have removed all the shite, so dont want any risk of delamination.

Any help?
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Old 17-02-2012, 01:15 PM   #16
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SO what to repair in?? Reading on other forums, most people seem to insist that vinylester doesnt stick to vinylester to great.
Any help?
I suspect you mean "polyester to vinylester"
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Old 17-02-2012, 01:18 PM   #17
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I think repairing Vinylester at all is a pain and achieving a proper chemical bond is more difficult than with any other resin.
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Old 17-02-2012, 01:25 PM   #18
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I think repairing Vinylester at all is a pain and achieving a proper chemical bond is more difficult than with any other resin.
I think any thing is a pain to repair!


I thought Scorpion used Derakane to build their fuel tanks.
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Old 17-02-2012, 02:02 PM   #19
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Picked some gel up from scorpion and someone found some info. It is all derakane layup. But he also thought derakane was only repair option. Anyone got a spare 25kg? It's a vinylester right?
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Old 17-02-2012, 02:17 PM   #20
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Anyone got a spare 25kg? It's a vinylester right?
I'd have thought Scorpion would have some!
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