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Question: question1 the drag charactenstics of a blimp or an airship...

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Question1 The drag charactenstics of a blimp (or an airship from the tu model If the speed of the actual blimp through stıll air is 15 m/s, 11 What airspeed is needed in the wind tunnel in order for dyna diameter and 60 m long are to be studied in a wind tunnel expenment using a 1 mic smlanty (same Re) to be achieved? You can assume the same air properties for the atmosphere and in the wind 12 Are compressibility effects significant in the experiment measurement? Take the M-1 in the wind tunnel to be at 330 m/s if the drag measured in the wind tunnel is xN, what is the drag that can be expected on the actual blimp? 13 You can assume the same Co for both the actual airship and the wind tunnel model If the model was to be tested in a water tunnel, what would the water speed be to achieve the same dynamic similanty? 14 Take the kinematic viscosity of air and water to be 1 568 x 105 m2/s and 0 801x106 m2ls respectively Explain why some airborne vehicles are tested in a water tunnel instead of wind tunnel. 15 15]
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