ESDU TM 172:2014

$22.75

Derivation of part span factors for lift and rolling moment

Published By	Publication Date	Number of Pages
ESDU	2014-11-01	58

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Category: ESDU

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Part-span factors are used as part of the prediction method in
various Data Items relating to high lift-devices and control
surfaces.

ESDU TM 172 presents analysis and background information
regarding the derivation of Figure 3 in ESDU 93019, Figure 1 in
ESDU 74012 and Figures 4 and 5 in ESDU 14004, all of which give
part-span factors. These figures have subsequently been used in a
number of other Data Items.

Firstly, this Technical Memorandum presents analysis which
provides a general derivation of part-span factors for both lift
and rolling moment. Information is presented regarding the
derivation of Figure 3 in ESDU 93019.

Next, background information is provided which gives the
derivation of Figure 1 in ESDU 74012.

An analysis is then presented which leads to the derivation of
part-span factors for both lift and rolling moment for spoilers.
Background to the derivation of Figures 4 and 5 in ESDU 14004 is
presented.

Finally a general overview is given which outlines the
dependence of part-span factor on the type of high-lift device or
control surface being used.