Sohreibev , Bentkowsky and Kerr 



DUCT DIAMETER, D 



Fig. 7. Ducted Thruster Schematic 



thr zf - '^zf l^zf I'^l 



thr za ~ ^zai^zal'^2 



Mfhrzf = 1.06 nzf|n2f|M| 



Mfhr za = i'13 nza|nza|M2 



M. 



0.686 nynKJ 



where 



^thr yf = 0.98nyf|ny,|M, 



Nthrya = i-04nyJnyjM2 



Nthrzn = - 0-686 n,Jn^„ 



■^thr mn~ ^ force due to thruster mn 



thr mn 



= Y force due to thruster mn 



1142 



