F-5-L Boat Seaplane: performance characteristics Page: 3 of 17
This report is part of the collection entitled: National Advisory Committee for Aeronautics Collection and was provided to Digital Library by the UNT Libraries Government Documents Department.
The following text was automatically extracted from the image on this page using optical character recognition software:
Lift = 0L (I/2 PVr) s
Drag = CD (1/2 PV ) s
%here S is the wing area, V the velocity and P the mass den-#
sity of the air. These equations hold true and the coefficients
CL and CD have the same value in any consistent system of units.
It should be noted that P is the mass-density of the air, that
is, the .eight per unit volume divided by the acceleration of
gravity, For force in Ibe., area in sq.ft. , and velocity in ft/
ses., P = .00237 for standard. air; or for force in lbs., area
in Sq. ft., and velocity in mi/h.T, P = .0051 for standard air.
The variation of P with altitude may be obtained from the ourve-
given in Aircraft Design Data, Vol. I.
Resistance and Velocity.
A summation of the parasite resistance for all parts except
the hull of the F-5-L seaplane gives Rp = 812 lbs, at 70 mi/hr.;
334 lbs. of this is in the slip stream and the remainder, 478 lbs.
is clear of the slip stream. These resistances vary as the square
of the velocity so that at any velocity V, (mi/hr) the total
parasite resistance (except the hull) is
R= F.R, f R
(334 F + 478) ()a
where F is the factor which corrects for the increased velocity
in the slp stream.
Here’s what’s next.
This report can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Report.
Diehl, W. S. F-5-L Boat Seaplane: performance characteristics, report, October 1922; (digital.library.unt.edu/ark:/67531/metadc53786/m1/3/: accessed February 20, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.