Cooling - keel cooling system 10

Air bleed valves

Water Level

Baffle

Ideal keel cooling tank

Exposed Surface Area

The keel cooling tank size should have a surface area exposed to the canal or sea water of: 0.25 x the bhp of the engine = the square feet of cooling area required (for steel hulls).

Efficient keel cooling tanks are side mounted, see illustration. The ideal keel cooling tank should have: a) The ‘baffle’ continuously welded to the outer skin and should be close fitting to the inner skin. b) The tank should be thin in section (30mm to 40mm) as it is the heat transfer to the canal or river water that is important. c) The tank must have air bleed valves fitted on the top at both ends of the tank

Keel cooling pipes under the hull of yachts or work boats, that achieve the same surface area can also be used. If you have any questions about keel cooling please refer to our design guidelines detailed on our website, or ask us.

12 Steel Tanks Steel Tanks Engine Model Size (ft) Size (m2)

Beta 14 3.5 0.33 Beta 16 4.0 0.38 Beta 20 5.0 0.46 Beta 25 6.3 0.59 Beta 28 7.0 0.65 Beta 35 8.8 0.82 Beta 38 9.5 0.88 Beta 43 10.8 1.00 Beta 50 12.5 1.16