In: Mechanical Engineering

- A device used to expose fighter pilots to high g’s that they
might experience in action incorporates a small cockpit on the end
of a 50 ft. long radial shaft that is attached to the cg. of the
cockpit. The cockpit and pilot weigh 600 lb total. If there is a
motor that provides a torque of 1000*sqrt(t) ft-lb to the system,
calculate the following:
- How fast does the cockpit have to travel to produce 6 g’s?
- How long does the system take to get to that speed?

The assumptions in this case are

- There are no efffects of wind resistance whatsoever
- The cockpit rotates in a horizontal plane

Given,

- length of rod
**r = 50 ft** - Requred acceleration
**f**= 6g = 6*32.1 ft/s2 =**192.6 ft/s2**

Thus from laws of centrifugal acceleration, we get

So linear velocity is 1.963*50 = 98.15 ft/s

Now it is said that the torque acting is 1000*sqrt(t). Thus from there we can proceed as

[torque is product of force and radius]

[ Force is product of mass and acceleration]

[Given total mass is 600 lb]

[ changing linear acceleration to angular acceleration by dividing by the length of the rod]

Now let us assume that the angular velcoity of the capsule is 0 rad/s at 0 s, and 1.963 rad/s at t seconds. Then using them as integration limits we get

Thus the required **angular velocity is 1.963
rad/s**, or **linear velocity is 98.15 ft/**,
and the **time taken will be 4 minutes and 29
seconds**

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6. A device for acclimating military pilots to the high
accelerations they must experience consists of a horizontal beam
that rotates horizontally about one end while the pilot is seated
at the other end. In order to achieve a radial acceleration of 35.1
m/s2 with a beam of length 5.39 m, what rotation frequency is
required?
? Hz
7. You want to design an oval racetrack such that 3200 lb
racecars can round the turns of radius 1000 ft at...

The
device used for generating very high voltage is call a(n)
Note: in own word

1.
What action (good or bad) might managers take when investors have
already high expectations and managersdesire to outperform peers on
TRS?

Suggest improvements to sensors and actuators so that they might
be reliably used in high specification military aircraft which
operate at both ends of the temperature spectrum.

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