AERSP 407/504
Homework #1
Due September 9, 2015
1. Read chapter 1 of Leishman. Briefly summarize four technology barriers that prevented the
development of a practical helicopter prior to 1900. This is similar to problem 1.1 in Leishman.
Keep your respons

AERSP 407/504
Homework #2
Due September 23, 2015
1. Problem 2.14 in Leishman
2. Pick four helicopters (these might be the same helicopter you chose for problem 3 on
homework 1). Estimate the vertical autorotation descent rate for these helicopters, assumi

AERSP 407/504
Homework #3
Due October 7, 2015
1. Write a program to calculate thrust and power coefficient for a rotor in hover using a numerical
BEMT solution as described on page 130 of the text. Assume rectangular blades ( is a
constant), linear twist

AERSP 407/504
Homework #4
Due October 19, 2015, Problem 1,2, and 8 can be submitted October 23, 2015
1. Modify your BEMT code from homework #3 (or use my code if yours does not work) to include
Prandtl tip loss and variation in drag coefficient with secti

AERSP 407/504
Homework #5
Due November 11, 2015
1. A delta-3 hinge creates pitch-flap coupling (see section 4.12). This is often used on tail rotors
to reduce the amount of flapping experienced in forward flight. A positive delta-3 causes the
blade pitch