Browsing by Author "Thapa, Dipesh"

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    Antioxidant, antimicrobial, cell cytoxicity assay and phytochemical screening of some medcinal plants
    (2017) Thapa, Dipesh; Krishna Das Manandhar
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    Optimal distribution of Propeller dynamic balancing correction weights to match pre-defined attaching points
    (I.O.E. Pulchowk Campus, 2022-09) Thapa, Dipesh
    Dynamic balancing on an aircraft propeller is performed on frequent basis. An unbalanced propeller produces noisy and uncomfortable vibration to passenger. It also adds dynamic load to structure causing early failure of vital components compromising aircraft’s safety and reliability. Therefore it is always desirable that any propellers during its service be balanced both statically and dynamically. A field dynamic balancing of propeller need frequent engine run up. An engine run up comes with additional cost, time and pollution. Moreover aircraft maintenance personnel get exposed to more air and noise pollution during propeller balancing than general aircraft departure due to longer exposure time and power run requirements. Hence any attempt to reduce the number of trail run will save cost, environment and health of these personals. Various standard procedure being used for dynamic balancing need at most three trail runs but additional to this extra run may require when there is a collective error due to approximation of attachment location from demanded location and approximation of balancing weight from actual balancing weights. Elimination of this error could be a key to reduce extra trail runs. This paper is an attempt to do so by splitting a demanded weight to best combinations of available weight in best available