%0 Conference Paper %B 34th Annual Conference, Seattle, Washington, May 5-7 %D 1975 %T 1050. Approximating Inertia Uncertainties for Satellite Flat Spin Analysis %A Lagana, J D %A Lotta, J G %K 05. Inertia Calculations %X Inertia parameters discussed in this paper are the spin to transverse ratio and the difference in transverse moments of inertia. Equations derived in this report will yield approximate uncertainties for the inertia parameters for flat spin analysis of dual spin spacecraft. These uncertainties must have the independent and dependent elements correlated and/or cancelled to be of value. The uncertainty of the spin to transverse ratio when applied to the nominal value gives a confidence level relative to the critical ratio of 1.00. The uncertainty of the difference in transverse moments of inertia when applied to the nominal value and compared to the torque that a dual spin spacecraft de-spin motor can supply gives insight as to whether that spacecraft can be recovered from a flat spin. In the past, both uncertainties were estimated without separation of independent and dependent variables, yielding highly inaccurate values in most cases. The generally high inaccuracies imposed confining restrictions on the mass properties engineer. This could result in unnecessary ballast weight addition or imply that physical measurements are required where calculated values would suffice. Therefore, it is of economical importance that these inertia parameters be accurately estimated. %B 34th Annual Conference, Seattle, Washington, May 5-7 %I Society of Allied Weight Engineers, Inc. %C Seattle, Washington %P 20 %8 5/5/75 %G eng %U https://www.sawe.org/papers/1050/buy %9 5. INERTIA CALCULATIONS %M 1050 %1 Non-Member Price: $20.00; Member Price: $10.00 Members: First 10 product downloads are Free. %2 10.00 %3 20 %4 SAWE1050