Wind Tunnel Testing on a Generic Model of a Hybrid Lifting Hull

Effect of diamond shaped strut with cylindrical pitch rod in subsonic wind tunnel testing

“…Moreover, the type of test conducted and the results presented in this paper will give confidence in decision making for the use of diamond shaped struts at low speeds, which are usually used for testing at supersonic and hypersonic speeds. Figure 10 Forces and moments of Strut-A at V=50 m/s and different  Sometimes, the aerodynamic forces on the body alone are defined as the difference between the aerodynamic force of the body attached with the strut and results of strut alone testing [20]. However, this is not the true representation as there is always some effect of the interference due to model support system as well.…”

“…The tests have also shown that the aerodynamic forces and moments arising from the strut-A with pitch rod may be of considerable magnitude. During testing an airship's hull or a bird model the forces on the struts are more than the magnitude of forces on the model itself [2,20]. Such effects can be realized by replacing the unit reference values by the exact values.…”

“…Estimation of bird aerodynamics [12][13], car aerodynamics [14][15], a study of lift generated wakes [16], airship aerodynamics [17][18][19][20] are a few examples. The work described in this paper will give a first-hand knowledge of the aerodynamic and stability characteristics of the proposed diamond shaped strut which are lighter in weight and occupy less model area.…”

Airships in U.N. Humanitarian and Peace Operations: Ready for Service?

“…They are at least as fast as traditional designs (to produce aerodynamic lift) and are probably more controllable in adverse wind conditions. Consequently, they are the most common design option among the many airship development projects underway (Haque, Asrar, Omar, & Suleiman, 2016). Some developers also propose using lifting gas compression to provide vertical take-off and landing capabilities without the need for a ballast.…”