When specifying components for a hydraulic power unit, the prime mover is sized based on torque, speed, and power requirements of the hydraulic pump. This is fairly straightforward for electric motors bec ause they generally have a starting torque that far exceeds running torque.
Great Danes live on average 8 to 10 years, but have been known to reach 12 years of age. The Great Dane is subject to two main health problems that afflict 99% if them - Dysplasia and Bloat. Great Danes cost more to look after than smaller dogs. Their shots will cost more, especially their heartworm medicine.
Your puppy will continue to mature until age 2 to 3 years of age. Certain Danes may grow slightly taller over the second and third year and most will fill-out, adding additional body weight. Abby came to us at 28 lbs (8 weeks), she finished at 125lbs. The big thing I learned when Abby was small is to keep in mind what you let them do when they are small they will do at there all grown up. Jumping, sleeping on the couch...