scholarly journals Trim investigation for coaxial rigid rotor helicopters using an improved aerodynamic interference model

2019 ◽  
Vol 85 ◽  
pp. 293-304 ◽  
Author(s):  
Ye Yuan ◽  
Renliang Chen ◽  
Pan Li
Keyword(s):  
Interference Model ◽  
Rigid Rotor ◽  
Aerodynamic Interference

Trimming Analysis Method of Quad Tilt Rotor Based on Aerodynamic Interference Model

2020 ◽  
pp. 1-13
Author(s):  
Zhigang Wang ◽  
Qiannan Wang ◽  
Hongrui Yu ◽  
Dengyan Duan ◽  
Zhiwei Ding ◽  
...  
Keyword(s):  
Interference Model ◽  
Analysis Method ◽  
Tilt Rotor ◽  
Aerodynamic Interference

scholarly journals Aerodynamic Interference Model for Multirotors in Forward Flight

2020 ◽  
Vol 57 (6) ◽  
pp. 1220-1223
Author(s):  
Dong Han ◽  
George N. Barakos
Keyword(s):  
Interference Model ◽  
Forward Flight ◽  
Aerodynamic Interference

An ab initio MO study of conformation structure of nicotinamide and its derivatives

1983 ◽  
Vol 48 (7) ◽  
pp. 1842-1853 ◽  
Author(s):  
Stanislav Böhm ◽  
Josef Kuthan
Keyword(s):  
Ab Initio ◽  
Wave Functions ◽  
Semiempirical Calculations ◽  
Rigid Rotor ◽  
Qualitative Similarity ◽  
Ab Initio Mo ◽  
Experimental Findings

Conformation of nicotinamide (I), 3-carbamoylpyridinium (IIa), 1-methyl-3-carbamoylpyridinium (IIb), and 1-methyl-1,4-dihydronicotinamide (IIIa) has been studied in the rigid rotor approximation on the basis of non-empirical STO-3G wave functions. The rotation barriers decrease in the order: IIIa > I ~ IIb > IIa. When confronted with semiempirical calculations, the conformation curves of molecular energy show a better qualitative similarity to the EHT than to NDDO and particularly to CNDO/2 curves. Relation of the calculated characteristics to experimental findings is discussed.

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