13012 Dykstra 62

General

Contacts

• client: Dick Alewijnse (NL) - DA is contactperson for all questions regarding systems
• project manager: Robin ten Hoope (NL) - RtH also drew up the interior since GDNP did not have time for it
• contact person GDNP: Erik Wassen (NL)

Trivia

• carbon mast costs about 250K which is more expensive than the interior (and the interior is more expensive than the aluminum construction)
• sistership 'Windhunter III' is build by Aluboot (Henk Borneman) and owned by Johan Mast
• ballast system with dumphatches is developed by Heine Deelstra from Gaastmeer Design, in cooperation with K&M Yachtbuilders

Minutes of Meeting

06-09-2013

Dick Alewijnse, Erik Wassen, Robin ten Hoope

1 CONSTRUCTION

• A Keelconstruction/guides/stability trembling / nose through deck / with/without shell bulb
  • One side plastic material on trunk, anodized guide part on keel
  • Keel configuration and construction detailed and delivered by Dykstra
  • Forward part of keel as high as possible, partially penetrating through deck
  • Up/down movement speed 1m/min
  • Cylinder pushes keel in lower position tight against shell, max. pressure to be definded (EW)
  • In upper position the keel enters in the wedge shaped trunk which will secure the keel
  • Bulb of casted lead (in mould)
  • Internal a galvanized frame with threaded ends, mounted with galvanized nuts
  • Between bulb and keel an isolating part which separates lead from aluminum
  • Also the penetration of the threaded ends need to be isolated
• B Alustar
  • NO ALUSTAR. Advantages do not outweigh the disadvantages of a yacht of this size.
• C Final shell stingers
  • Stringers are OK as drawn by Navyk
• D Miscelaneous remarks/modifications of drawings
  • Stairs in interior in way of trunk gearbox is not properly aligned, situation to be modified (RtH)
  • When stairs is OK then optimize drive line by moving gearbox aftward, decrease distance engine-gearbox, if necessary make a small bulb in shell for gearbox (RtH / EW)
  • Detail garage of entrance hatch in combination with scupper pipes (RtH)
  • Define softpatch size and position, generator must be removable with engine in place (RtH)
  • Add double plates and deck reinforcements (EW)
  • What impact has relocating the PS ER bhd, how will be detailing of bathroom, how much free space requires the Turbo of the Steyr? (RtH)
  • Indicate cockpit recesses, make proposal (RtH)
  • Add additional pillars in way of F19 (mainsheet track) (RtH)
• E Penetrations/standpipes
  • Determine position of standpipes for in and outlet, centralize as much as possible (RtH)
• F Dishwasher – modify recess
  • Give Navyk new dimensions and position so this can be processed (RtH/EW)
• G Windows in aftside deckhouse
  • To be determined in combination with interior and exterior sideview, make proposal for Dykstra approval (RtH)
• H Hatch sill entrance
  • Not discussed, make proposal for Dykstra approval (RtH)
• I Porthole positions
  • Pass new postions to Navyk so it can be updated in the construction plan (RtH)
• J Align PS ER bhd with cockpit seat
  • What impact has relocating the PS ER bhd, how will be detailing of bathroom, how much free space requires the Turbo of the Steyr? (RtH)
• K WT doors relocated in BHD
  • Determine new door type and position and inform Navyk (Rt)
• L Tanks ballast, fresh and grey. Discuss function and execution
  • Situation unchanged
• M Motor position in relation with twindisc
  • Twin disc is no option because of angle which requires too many couplings

2 DECK PLAN

• A Layout related to sailplan and sheeting, check
  • Conform latest deckplan. Staysail to be drawn (EW, done 06-09-2013)
• B Sheeting/halyard angles to winches, check
  • determine angles and heights for wich feeding (EW)
• C Complete equipment list
  • check execution and delivery for hardware quotes (EW)
  • strategic locations for fixed padeyes, upstands and footblocks (EW)
  • add 2 deflection points for kite/code sheet to winch (EW)
• D Skylight salon, general details, constr. etc. (EW)
  • skylight with dorade forward of F13 and extend glass 200m aft (RtH/EW)
• E Construction deckhouse, construction aluminum with wood, integrated windows, location additional pillars related to entrance, etc
  • Dykstra will give principal details as a guide for the construction (EW)
• G Possibility of second travellercar on forward rail
  • Extend foundation in deck for optional rail extension (EW)
• H Move fairlead to bollard
  • Dykstra will move this (EW)
• I Entrance hatch principles
  • Dykstra will give principle (EW)

3 SAIL PLAN

• A Raised forestay still possible with mast of Hall-spars?
  • will influence current offer of Hallspars. New offer required based upon new built profile
• B Sail area to be checked, behaviour under different conditions
  • Dykstra will make a new sailplan with all data given for price offer mast and hardware (EW)

4 INTERIOR

• A Interior drawings handed over to Dykstra for their approval
  • drawings are handed over

5 MISCELANEOUS

• A What else Dykstra will do / finish?
• B Bowsprit
  • Dykstra will set up bowsprit geometry with adjustable water stay (EW)
• C Fender storage in fore peak
  • Alewijnse likes to store fenders in forepeak between hull and chainlocker, is this possible?
  • Yes, see mail 06-09-2013 EW
• D Mainsheeting details
  • details and geometry of system of run through deckhouse (EW)
• E No pulpit at bow
  • drawings will be updated (EW)
• F weight estimation systems
  • systems and positions arranged for weight calculation (RtH)

40 Construction

• frames will be all CNC
• bulb profiles changed into FB60x6
• deckhouse will be aluminium (by phone with Dykstra)
• bulkhead stiffening will be: vertical T50x50x5 and horizontal FB50x5 (wait for answer)
• shell division and as well other plate division will be made by Navyk (wait until a yard is chosen) (by phone with Dykstra)
• chain locker for anchor will be from aluminium 5mm (by phone with Dykstra)
• bow thruster construction will be finished by Navyk (by phone with Dykstra)
• plate under stairs iwo cockpit entrance will be as in the construction drawing (by phone with Dykstra)Changed

Liftkeel

• detailing might be done by Frans Brandjes

60 Systems

General

• overboards - all above WL
• overboards - combine as much as possible
• valves - reduce number of valves where possible
• drafting
  • draw at scale 1:1
  • scale in titleblock is 'NA' (not applicable)
  • uniform use of symbols
  • uniform size of symbols
  • all tables grouped vertical in right side of drawing
  • all on A2 format?
  • use new titleblock / notes / table
  • don't add unnecessary knucles in lines
  • in the near future we should standarize symbols and draw the diagrams on a grid of 10x10
  • use ball valve symbol instead of globe valve symbol
  • use E for electric operated valves
• collect supplier data for each appliance (in the project folder there is not any documentation)

Ballastsystem Windhunter

• • breather pipe must have sufficient diameter, Windhunter has Ø50 which is considered too small, they advice Ø80
  • breatherpipes go to grills in aftside doghouse
  • when breatherpipes overflow you know the tanks are full
  • Goiot hatches operation lines are lead to the cockpit and have a 2:1 tackle
  • Goiot hatcehs have a lever
  • double bottom is used as cross over, K&M is not satisfied with (hard to make watertight, no inspection possible) and prefers 2 or 3 large diameter pipes
  • Goiot deckhatch rectangular, for example 300x500 or 250x400, plexiglas replaced by aluminum panel
  • advantage of using standard deckhatch is that spareparts like gaskets can be easily found and replaced
  • Windhunter uses only ballastwater, we use a combination with grey water which gives smells so the breather pipe should be a closed ring?

Bilge

• manifold in galley (against trunk ER?), all manual valves well accessible
• draw breathers always in upper end of line
• seperate cross over from fill/suction line (saves 1 BIG manifold)
• calculate fill up/empty time for wing tank (verify cross sections of breather + cross over)

Fresh water

• note: wingtanks are not intended for storage because they heat up due to blue hull
• reduce number of valves
• toilets possibly come with double connections for FW / seawater, then no valve required, check this out (possible supplier is Raritan or Tecma)
• pumps, hydrofor, etc - to be removable: valves fore and aft
• add taps at low points
• reduce overboards by combining pipes
• use colors for hot (don't use 'warm') and cold water
• disconnect sea water tap galley from FW system
• calculate required time to fill up wingtanks with hydrophor
• breatherpipes wingtanks of sufficient diameter (calculate time required to empty/fill one tank?)
• breatherpipes wingtanks to keeltrunk?
• connect crossovers to bottom of wingtanks
• connect fill lines to sides of bottomtanks
• LS of HL as in bilge diagram?

questions / remarks SH

• Robin - bottom tanks - did we discuss about increasing the size or moving? Tank volumes shall not be increased
• cross over and breather section to be calculated (how much time it takes to move the water from PS to SB)
• fill - why via wingtanks? wingtanks should not be used for storage so fill should go directly to bottomtanks? DONE
• wing tanks - why drain? Now they are used also for storage, so drain is required
• wing tanks - why spare connection on top? Spare connection from wing tanks removed
• wing tanks - avoid that water drains through breather line
• wing tanks - extend fill line to near bottom to reduce noise?
• bottom tanks - why a valve in breather line? Removed
• watermaker - connect directly to bottom tanks only? Yes, wing tanks shall be filled from bottom tanks with the hydrophor
• cross over - always filled with water
• hot water to laundry machine? Laundry machine does not need hot water, only the dishwasher

Sea water

• galley - own faucet, no connection to FW faucet

Black water

• breather aft in transom, forward in mast?

Fuel

• pump does not require electric valves fore and aft
• Fuel transfer system has 20 l/min and 30 l/min flow rate for the pumps and 5 l/min for duplex filter. Should we put a bigger filter?

Electric

• generator - Northern Lights? Wisperpower company is running into troubles?

Propulsion

• Steyr 4 or 6 cylinder
• check out if 26" prop can be combined with Twindisc gearbox, because of space issue, ER trunk might require modification, together with interior engine/shaft angles can be modified, keep 30% tipdistance for propellor, longitudinal position can be modified
• propellor
  • Flexofold 26" (optional 25" or 28", pending on engine and gearbox combination, issue is behaviour of sailing reverse)
• drawing of Twindisc is in e-mail of 22-07-2013