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

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)

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?
• 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?
• wing tanks - why drain?
• wing tanks - why spare connection on top?
• 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?
• watermaker - connect directly to bottom tanks only?
• cross over - always filled with water
• hot water to laundry machine?

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

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