Problem areas in producing a range of multicylinder, aircooled diesel engines for universal application are described.
If the manufacturer has dealt with water-cooled engines the design expertise between water cooling and air cooling is inter-related to a certain point and it is from this point that the technique required must be changed to satisfy the aircooled unit.
A multipurpose design has more inherent problems than a design aimed for a specific application and it is necessary to consider all the side effects involved.
Problems faced in the development of the cooling system, piston design, valve mechanisms, engine ratings, etc. for the range of Dorman's “DA” aircooled engines are highlighted.
Ideal applications for the 6 and 8-cyl engines are in short haul work with maximum stop and start operation. Many installations have been made in earthmoving and snow-blowing equipment.
Additions in the 8-cyl unit are planned.