E. Effler, R. Lane, J . Kissel, B. Shapiro

After Anamaria successfully completed transfer functions at LLO of QUAD11, and Robert was able to complete transfer functions of H2SUSITMY (QUAD02), I've collected all the data* we have on the assembled and tested QUADs (@ LHO, QUAD03, H2SUSITMY; @LLO QUAD11, 12, 13, and 14), onto a single set of plots.

From these results, we can conclude that H2SUSITMY's reaction chain has it's second pitch mode too low, compared with all other QUADs. This mode is particularly sensitive to the d's (distance between suspension break-off point and center of mass for a given stage) of the TOP / UIM stage (either dn or d1, see T1000458, QUADModelParamsDiagram_T1000458-v6.pdf), to which the only adjustable physical parameter this corresponds are the TOP and UIM blade tip heights. The guess (from discussions with Brett) is that with such a large deviation in the Pitch mode, that such a discrepancy in blade tip heights should be visible with the standard gauge block measure of the heights. 


*Note that I've not included QUAD01, who's measurements were bad because of measurement error, and also, a few of the degrees of freedom on QUAD03 show low magnitude -- this is also measurement error (not driving hard enough), we believe the dynamics are OK.