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Патент USA US2404045

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July 15, 1946-
F. E. FLADER
2,404,045
AIRFOIL MOUNTING‘ AND ACTUATING MECHANISM
Filed Nov. 20, 1943
FIG. I
II
"I
INVENTOR.
\/
FREDRIC E. FLADER
ATTORNEY
Patented July 16, 1946
2,404,045
UNITED STATES PATENT OFFICE
2,404,045
AIRFOIL MOUNTING AND ACTUATING
MECHANISM
‘
Fredric E. Flader, Kenmore, N. Y., assignor to
Curtiss-Wright Corporation, a corporation ,of
Delaware
Application November 20, 1943, Serial No. 511,155
1
2 Claims. (Cl. 244-42)
2
This invention relates to I improvements in
of the arms l3 includes a cylinder I5. Hydraulic
?uid from supply lines I6 and Il may be intro
mounting and actuating mechanisms for the aux
iliary airfoils of airplanes, and more particu
duced into the said cylinders through branches
larly the invention is concerned with a mechanism
I8 and I9, respectively, the delivery of ?uid under
of the kind which may be availed of to extend and 5 pressure from the pump, or other source, to the
lower a flap, whereby to increase the effective
supply lines being controlled by a suitable valve
camber of the wing of which the flap is a part and
or valves (not shown).
at the same time open a slot in, and increase the
At its inner end each of the cylinders I4 is
basic or overall area of, the wing.
pivotally connected to a bracket 20 which is“ car
One object of the invention is to provide a 10 ried by a rib or other convenient part of the main
mechanism of the character generally described
airfoil.
which will move the auxiliary airfoil rapidly to
are secured at their outer as well as at their inner
the desired position and which will support it
solidly in such position.
A further object is to provide a mechanism
which is operable to lower the auxiliary airfoil
in any desired extended position.’
A still further object is a mechanism which
may, if desired, be actuated to lower the auxiliary
airfoil without at the same time extending it.
A still further object is to provide a mechanism
which may be utilized to mount the auxiliary
airfoil upon the main airfoil ‘without cutting into,
or otherwise deforming, the nose or leading edge
of the auxiliary airfoil.
A still further object is a novel design and
arrangement of the parts of the mechanism,
whereby to obtain simplicity in construction and
dependability in operation.
_
The invention is illustrated in the accompanying drawing, in which:
Figure 1 is a view in plan of an airplane wing
having a ?ap mounted and actuated by mechanism embodying the features of the invention.
Figure 2 is an enlarged transverse section taken
along line 2--2 of Figure 1, the flap being shown
in full lines in its normal elevated position and in
dotted lines in its lowered, extended position.
Figure 3 is a similar section, the flap being
shown in full lines in the same position as in
Figure 2 but being Shown in dotted lines in a
lowered, non-extended position
The mounting and actuating mechanism is
illustrated by way of example in connection with
a flap II! of an airplane, the latter being su?iciently indicated for the purpose in view by a
ends, as at 2|, to ?xed parts of the main airfoil.
Plungers 22 which are connected to, or which are
extensions of, the pistons (not shown) in the cyl
inders I4 are pivotally connected at their outer
ends to cars 23 on upper and rearwardly located
portions of the nose of the flap while plungers 24
associated with the cylinders I5 are connected at
their outer ends to cars 25 on lower and forwardly
located portions of the nose of the flap, the con
nections of the plungers 22 with the ears 23 and
the connections of the plungers 24 with the ears
25 preferably being along parallel lines. Normally
the plungers 22 and 24 support the ?ap in the
full-line position shown in Figures 2 and 3. In
such position the nose of the ?ap is located under,
and in pro?le conforms substantially to, the
trailing edge of the main airfoil, while the upper
and lower surfaces of the flap provide substan
tially uninterrupted continuations of the corre
sponding surfaces of the main airfoil.
The ?ap I0 may be extended and lowered to
increase the lift of the wing by admitting hy
draulic fluid into the cylinders I4 and I5, simul
taneously or otherwise. As the plungers 22 and
24 are extended, the flap is moved to the dotted
line position illustrated in Figure 2. The move
ment of the ?ap to such position increases sub
stantially the basic area, chord and camber of the
wing and at the same time opens a slot between
the nose of the ?ap and the trailing edge of the
main airfoil through which air may ?ow from
the under side of the wing. On the other hand,
if it is desired to maintain the basic area of the
wing constant and obtain the increased lift by
showing of a wing II thereof.
In accordance with the invention the flap I0
15
20
25
30
35
40
45
The cylinders [5, on the other hand,
lowering the ?ap without extending it, hydraulic
fluid may be admitted only to the cylinders I4.
is connected to the main airfoil by an upper series
In this event the plungers 22 are extended while
of extensible arms I2 and a lower series of ex- 50 the plungers 24 are held in their normal re
tensible arms I3. Although the said arms may, if
tracted positions, and the flap is moved to the
desired, be in the form of jackscrews and medotted-line position shown in Figure 3 without
chanically actuated, they are preferably, as illusopening a slot between it and the main airfoil.
trated, hydraulically actuated. To this end, each
The ?ap may also be adjusted to, and supported
of the arms I2 includes a cylinder I4 while each 65 in, various other positions by limiting to differ
2,404,045
3
4
ent degrees the outward movement of the plungers
of said cylinders to said main airfoil so that they ~
are supported against angular movement, means
22 and 24.
It will be apparent that the plungers 24 pro
for pivotally connecting other of said cylinders to
vide pivots about which the ?ap may be angu
said main airfoil so that they are free to move
larly adjusted by the plungers 22, the stationary (R angularly, and means for introducing hydraulic
fluid into said cylinders to cause said plungers
cylinders l5 permitting rectilinear movement only
to move said auxiliary airfoil with relation to said
of the plungers 24 while the pivotally mounted
main airfoil;
cylinders 14 automatically swing about their
42. Mechanism for attaching an auxiliary airfoil
inwardly. The construction described has the 10 ‘to a main airfoil and for actuating the auxiliary
airfoil, said mechanism including a plurality of
advantage that any desired angular movement
arms, each having a hydraulic cylinder and an
of the flap may be obtained for any desired slot ‘
extensible plunger carried by the cylinder, means
adjustment. In this connection it will also be
for pivotally connecting said plungers to said
noted that the connection of the ?ap to the
mounting and actuating mechanism does not in 15 auxiliary airfoil, means for connecting certain of
pivots as the plungers 22 are moved outwardly or
volve cutting away of any of the nose portions of
the flap or in otherwise interfering to any sub
stantial degree with the free passage of air be
tween, or around, the main and auxiliary airfoils.
I claim as my invention:
said cylinders to said main airfoil so ‘that they are
supported against angular movement, means for
pivotally connecting other of said cylinders to
said main airfoil so that they are free to move
20 angularly, and means for introducing hydraulic
1. Mechanism for attaching an auxiliary airfoil
to a main airfoil and for actuating the auxiliary
airfoil, said mechanism including a plurality of
arms, each having a hydraulic cylinder and an
extensible plunger carried by the cylinder, means 25
for pivotally connecting said plungers to said
auxiliary airfoil, means for connecting certain
?uid into said cylinders to cause said plungers
to extend and lower said auxiliary airfoil, said
arms being operative to lower said auxiliary air
foil to substantially the same degree in various
extended positions.
FREDRIC E. FLADER.
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