HP 35s Instruction Manual page 2

hp calculators
HP 35s General applications – Part 2
General applications
This training aid will illustrate the application of the HP 35s calculator to several problems in other areas. These
examples are far from exhaustive, but do indicate the incredible flexibility of the HP 35s calculator.
Practice solving problems
Application 1: Aerodynamics
Example 1: An airplane is in a steady coordinated turn with a true airspeed of 250 mph at a 40 degree bank angle.
What is the turn radius in feet and the turn rate in degrees per second?
The equations are:
Turn Radius = Velocity
Turn Rate = g x TAN ( angle ) ÷ Velocity
Where g is 32.2 feet per second per second
Solution: First, convert the speed to feet per second for unit consistency.
In RPN mode:
In algebraic mode:
Answer: The turn radius is just under 4976 feet and the rate of turn is approximately 4.22 degrees per second.
Figure 1 (RPN mode) shows the radius on the second level of the stack and the rate on the bottom level.
hp calculators
2
÷ ( g x TAN ( angle ) )
250Ï5280¸
60¯60¯
Ï
º=32Ë2Ï40q¸¯
w32Ë2Ï40q¸
w¯º´
º=250¸5280
¯60¯60Õ¯4
32Ë2¸q40Ï
º´32Ë2¸q40¯
4250¸5280
¯60¯60Ï
- 2 -
(Save for next calculation)
(Radius in feet)
(Rate of turn in degrees
per second)
(Radius in feet)
(Rate of turn in degrees
per second)
Figure 1
HP 35s General applications Part 2- Version 1.0