Development of a method for predicting the performance and stresses of vtol-type propellers

TLDR: In this paper, the authors present a theoretical method which allows the prediction of performance and stress characteristics of a single VTOL-type of propeller-wing-nacelle combination operating in various flight conditions from hovering through transition and into axial flight.

Abstract: : The report presents a theoretical method which allows the prediction of performance and stress characteristics of a single VTOL-type of propeller- wing-nacelle combination operating in various flight conditions from hovering through transition and into axial flight. The method includes (1) the effects of a distorted wake, i. e., the effects of contraction and radial and axial velocity variations; (2) the effects of hovering close to the ground; (3) the interference effects from a nacelle and wing buried in the propeller slipstream. Also presented are experimental thrust and torque data. However, because of the insufficient accuracy of the experimental data collected, no definite evaluation of the model is made.

Full text

Task 1D121401A142
Contract
DA
44-177-AMC-75(T)
USAAVLABS Technical
Report
66-26
June
1966
DEVELOPMENT OF
A
METHOD FOR PREDICTING
THE
PERFORMANCE
AND
STRESSES OF VTOL-TYPE PROPELLERS
CAL
Report
BB-1846-S-1
by
A.
R.
Trenka
Prepared
by
Cornell Aeronautical
Laboratory,
Inc.
Buffalo,
New
York
for
U.
S.
ARMY AVIATION MATERIEL
LABORATORIES
FORT
EUSTIS,
VIRGINIA
Distribution
of this
document
is unlimited