Report of the Second Piloted Aircraft Flight Control System - Acgsc.org

or, ii the pinton s p w A, in f ~ t e ,
Mod static tent8 (ioeo, loading the surface and remuring itr dafleatione)
vill not pmvlde a natinfacto~ nrann for obthhgj tho aborr
spring conetento
To numnarise,the following concluniosu ngardbg Horthrpp typo
b@raulic-flutter nptan may be made:
lo A Wraulic npt comctian factor r~rt bo added routerbllq
to the no& A c e quadratic ( w,s'+ 4 s t4)
to obtain the proper load trrranfer function,
2. Only the range AI of Figo l8 is of intenst in tho prob1
since the regions A, and 8 ark wll blow atrl tho mnge
c in far above the normaw encomterod fluttu fnquacioa.
3, In the nmg. of interest, Aa , the hydraulic vtr mar k
viawed ensantially an a pan npring, an far an tho abnaae of
phase lag t am in the correction factor in coacemed.
The magnitude of this spring mmntant in apprwdrate tht of
the nerles caabinatian of (1) the spring co~pUq,the hydraulic ~ W e r
and the surface, (2) the hydmul3c oil wring, and (3) tho pinton rod
nprln$ (ii finite).