Crispy 440 Open

 Crispy 440 OPEN  
 
The baby of the family has arrived!
The idea was to expand the family of Crispy open motorboats downwards, giving self-builders a simple, modern, essential, robust and small open motorboat project, which can be built easily and economically even in your garage, that can be powered with an engine in the range of those that can be sailed without a license here in italy (40 hp maximum) or with an electric outboard; these engines are also easily available at reasonable prices on the market both new or second hand  
    

 
 
the hull is derived from that of the larger 520 model, designed to be built in sheets of marine plywood, with a deadrise angle at the stern of 17° which guarantees a good compromise between behavior in rough seas and maximum speed; the boat therefore, despite its small size, it is not a unit exclusively for "extra-flat" waters  
 
  
 
    
the cockpit is definitely large for the total dimensions of the unit, which makes the boat a very intriguing choice for a broad range of activities going from a simple trip offshore, to sport fishing along the coast, to scuba diving or spearfishing; the cockpit can be kept totally clear to make the most of its dimensions, using a tiller-controlled engine:    
 
    
 
  
or be equipped with a small console with seat and wheelhouse with steering wheel ; given the construction system you can customize your cokpit to suit your needs:
 
    
  
 
The lines of the hull have been deliberately kept very simple to facilitate an easy construction within the reach of novice hobbyists at their first experience with nautical constructions, or to be a fast and effective build for experienced boatbuilders; the structure is given by 5 bulkheads, with a cage of structural stringers to connect them, and the planking given by 8 and 10 mm plywood sheets, ditto for the cockpit. 
     
 
  

The boat is obviously trailerable, even by a medium-sized car and with a single-axle trailer, the weight of the boat ready for navigation in fact is around 400-450 kg

 
main specifications :

• hull length: 4,40 m

• hull length: 4,40 m

• draft with engine down:  around 0,60 m

• engine : single outboard 10-40 HP

• bare hull weigth : 300 kg circa

• boat weight with engine (40 HP 4T) and pilot consolle and seat: about 400 kg

• fuel tank: under the deck sotto, maximum 60 litres 

• design displacement: 700 kg (3 adults and fuel tank full)

• maximum advised displacmeent : 820 kg (4 adults)

• top speed at design displacement with 40 HP engine: 27-29 knots (calculated)

  
 
Material list