need it in 10 hours

The figure below is a cut away drawing of an AH-45 Apache helicopter. The drive shaft is made up of several “short” shafts of about 4 ft in length.

The figure below is a model of the helicopter gearbox and components.

There are 2 engines with a maximum of 1700 shp each. A maximum of 11% of the maximum shaft horsepower can be applied to the tail rotor drive shaft. The torque Q maybe found using the equation, Q = 5252*shp/RPM (ft-lb).

MAE 3242-001 Mechanical Design I

Project: Conceptual Design of a Helicopter Tail-Rotor Drive Shaft

7/31/17 1/2

MAE 3242-001 Mechanical Design I

Project: Conceptual Design of a Helicopter Tail-Rotor Drive Shaft

7/31/17 2/2

Below is a drawing showing how the ends fittings are attached to the drive shaft. The dimensions are for reference only. The shaft fits into the end fittings and are rigidly attached to the shaft by bolts. Input torque is the same as the output torque ignoring small losses associated with the bearings.

Ignoring the couplings that are elastic fittings between the shaft components, we will assume ridged ends.

The problem is to design a drive shaft that can transmit the maximum torque with a 1.5 safety factor. The shaft has only its weigh, but must be designed to withstand 3 g’s maneuvering loads.

Expectations: Choose a material , - aluminum, steel or titanium – and design the wall thickness. Draw a deflection diagram for the shaft. What size bolts do you require. What is the safety factor for the bolts. Assume 6 bolts per side.

You can ask other class members to work steel, aluminum, or Titanium, and add a comparison in each report.

Format: 1. Summary 7. Solution (with references)* 2. Introduction (Problem Statement) 8. Answers 3. Describe Givens 9. Discussion of findings 4. Describe Assumptions 5. What do you need to Find *Homework solutions showing 6. Plan of action step-by-step process.