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Sept. 17, 1946.
_ 2,407,771
Filed sepi. 4, ¿1942
2 Sheets-Sheet l
Sept. 17, 1946.
-H. cfcsr-:AWUNDL-:R` _
Filed Sept. 4, 1942
2 Sheets-Sheet 2
Patented Sept. 117, 1946
' Henry C. Grawunder, Bellvîlle', Tex., assignor of
one-half to YJ . B. Huff, Jr., Harris County, Tex.
VApplication September 4, 1941.2,` Serial No. 457,244Y
2 Claims.
(Cl. 244-16)
This invention relates to a glider.- A
` An object of the inventionïis- to- provide a
glider of the character described having two
pairs of wings with means whereby the aviator
may actuate the wings, while the glider is in
motion to control the elevation of the glider as
it moves through the air. The invention also
embodies a novel type of wing construction here
inafter more specifically explained. `
It is a‘further object of the invention to pro
vide, in a glider, a novel type of stabilizer and
elevators under the-controlV of the aviator and
whereby the direction lof the glider either verti
end of the fuselage. These foot pedals form also
foot rests for the aviator on the seat 3 and they
may be manipulated to control the elevators in
dependently of each other so that said elevators
may be shifted to `assist in the elevation of or the
descent of the glider or to control its direction.
Extending out laterally from the fuselage near
its front end are the similar wings II, II whose
inner ends are hinged to the fuselage to pivot on
longitudinal axes. Behind-the wings II, II and
located slightly beneath them are the rear wings
I2, I2,` one on each side,whose inner ends are
pivoted to` the fuselage on longitudinal axes.
cally or laterally will be, to some extent at least,
These wings are preferably of similar construc
under the control of the aviator.
15 tion. As illustrated each wing includes a frame
With the above and other objects in View, the
consisting of a longitudinal bar I3 and a trans
invention has particular relation to certain novel
verse outwardly extending bar vI 4 whose inner end
features of construction, operation and arrange
is secured to said bar I3. , The wing surfaces are
ment of parts, an example of which is given in
composed of thin sections as I5 whose forward
this specification and illustrated in the accom 20 margins are secured to the frame in any suitable
panying drawings, wherein:
manner and whose rear margins may be free.
Figure 1 shows a side view of the complete
The adjacent edges of adjoining sections are
similarly overlapped as shown in Figures 3 and
Figure 2 shows a front, elevational view partly
4 sothat upon upward movement of the wings,
in section.
25 said overlapping margins will separate to allow
Figure 3 shows a plan view, and
the `air to pass therethrough so that the wings
Figure 4 shows an enlarged fragmentary cross
will offer a minimum of resistance to the air as
sectional view taken on the line 4-4 of Fig
the wings are elevated but as the wings are
ure 3.
moved downwardly, said overlapping margins
Referring now more particularly to the draw 30 will be held in close contact by the pressure of
ings, wherein like numerals of reference desig
the air beneath and downward movement of the
nate similar parts in each of the figures, the
wings will have a buoyant effect on the glider.
numeral I designates the fuselage as a whole.
The front and rear wings are operated simul
The fuselage is composed of any suitable ma
taneously but in opposite directions: that is, as
terial and is of sufûcient vertical width to pro 35 the front Wings are moved upwardly, the rear
vide room for the aviator.
wings are moved downwardly and vice versa.
An intermediate portion of the fuselage is cut
On opposite sides of the fuselage and accessible
away to provide the opening 2 wherein there is
to the aviator are the »levers I6, I6. These levers
located the aviator seat 3. In a preferred form
are mounted, at points intermediate their ends
of the invention, the fuselage is rounded oiî ver 40 for universal pivotal movement of the opposite
tically at the forward end and is extended and
ends on the cross-head I'I. This cross-head, in
upwardly tapered at the rear end.
turn, is mounted for universal movement in a
Securely fastened to the rear end of the fuse
suitable bearing I8 in the fuselage beneath the
lage there is a stabilizer comprising the ñxed
iiyer’s seat. Front and rear links I9 and 20 are
upwardly diverging planes 4, 4 and hinged to 45 pivotally connected to the front and rear ends of
the upper margins of these planes, one on each
each lever I6 as well as to the front and rear
side, are the elevators 5, 5 which, in effect, form
hinged extensions of the planes 4, 4. Each ele~
wings as clearly shown in Figures 1 and 2. By
rocking the levers I6 up and down, the wings
may be elevated and lowered.
vator has an upwardlyextended arm 6 and a
downwardly extended arm 'l and to the free ends 50
It will be seen that as the front wings II are
of said respective arms are attached the cables
elevated the rear wings I 2 will be lowered and
8 and 9. These cables extend forwardly and are
vice versa. As one set of wings is elevated, they`
attached to the upper and lower ends respec
will oder some resistance to the air and their
tively of the foot pedals ID, I0, which are pivot
supporting effect will be lost or reduced but this
ally mounted one on each side on the forward 55 will be offset by the fact that at the same time,
" "
front and rear rigid links pivotally connected
the other set of wings is being lowered with a
buoyant effect. Therefore by vigorously ma
nipulating the wings, the glider may be kept
to the front and rear ends of the, levers lrespec
tively, the front links being pivoted at their
other ends'to the leading edges of the front wings
and the rear links being ,pivoted Vat their other
ends to the leading edges of the rear Wings,
whereby upon the rocking of a lever the corre
sponding wings will be moved one upperwardly
afloat for an indefinite length of time and even
caused to soar irrespective of air currents. In
that respect the glider of the type herein de
scribed is believed to be superior to those now
in common use which latter are dependent upon
and the other, simultaneously, downwardly.
upward lair‘current's to attain a highereleva-~
The wings of the construction hereinabove
2. A glider comprising a fuselage, a seat there- Y.
in for an aviator, a pair of similar front wings
described will also have the eifect of propellingA . .extending out laterally from the fuselage and
the glider `forwardly as they are moved up and .
pivotally connected thereto to move independ
ently of each other, on longitudinal axes, a pair
-The drawings and description are illustrative .15. .of rearwings extending out laterally from the
merely and disclose what is now considered to. l A `fuselage and pivotally connected thereto to move
be a preferred form of the invention. It is ob
Y independently of each other, on longitudinal
vious, however, that the mechanical details of
axes, means mounted at each side of the seat
construction may be varied without departing.. ' on the'k fuselage and accessible to the aviator
from the broad principle- of the invention as 20 and arranged to be operated by the aviator, said
defined by the appendedy claims. . .
means on one'side of said seat beingY connected
What I claim is:
l. A glider comprising a fuselage, similar front
Wings extending out laterally from the fuselage
to the leadingfmargins of a front and a rear wing
on the‘same side- of the glider and said means
on the otherV side of said seat being connected »
and pivoted thereto on longitudinal axes, rear 25 to the leading margins of the other front and
Wings extending out laterally from the fuselage
and Whose inner ends are pivoted to the fuselage
onrlongitudirial axes, means whereby the wings
on one side of the glider may be- moved in~
dependently of the'movement of~thewings on
the other side of the glider, said means compris
ing levers, one on each side of the fuselage,
mounted at points intermediate. their ends for
universal pivotal movement on the fuselage,
rear wings,l said means being operable independ
ently of each other and >each beingfpivotally
mounted at al point intermediate- itsY connections
to the front and rear Wings whereby upon.v oper
ation of either one of said» means the Wings to
which it is connectedV will be simultaneously '
moved in opposite directions.
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