26.7 mm - Schempp-Hirth

SCHEMPP-HIRTH
Flugzeugbau GmbH.
Kirchheim/Teck
Sailplane variant Standard Cirrus B:
APPENDIX to
Technical Note No.
278 - 38
WORKING INSTRUCTIONS
Page: 01
No. of pages: 06
This sailplane variant is equipped with the connection for the 16 m wing tip extension.
Therefore the winglet for 15 m wingspan needs only to be adjusted:
1. a) Slip the winglet on the spar tube. Trim the surmounting wing shell for an equal gap to
the inner wing.
b) If the wing bolts does not fit to the winglet bearing increase the bore diameter.
Then apply resin with cotton flocks on the grease protected bolts and mount the
winglet again.
2. Copy the bore in the spar tube for the securing bolt to the winglet. First drill a hole with
a diameter of 7 mm, then insert spar tube (III) for verification of the proper position and
finally enlarge the hole to a diameter of 8 mm.
3. After the mounting of the winglet with the securing bolt check the play of the winglet. If
required add washers on the winglet bolts.
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SCHEMPP-HIRTH
Flugzeugbau GmbH.
Kirchheim/Teck
APPENDIX to
Technical Note No.
278 - 38
Sailplane variants
Standard Cirrus, Standard Cirrus G, Standard Cirrus CS 11-75L
Page: 02
No. of pages: 06
These sailplane variants feature no connection for a 16 m wing tip extension. Therefore the
connections for the winglets must be retrofitted.
1. Mark wing tip cut-off line according the sketch shown on page 03.
Then cut off the wing tip.
2. a) Mount wing rib (I) with suspension bolts on the spar tube (III) and mount winglet.
b) Fit wing rib (I) see page 06 to wing structure until the winglet matches the wing
contour.
c) If required remove and chamfer the foam.
3. a) Position the wing with winglet with the aid of template “A” (dimensions see page 04
and the photo on page 05). Fit the winglet with rib in the wing that the toe angle of
the winglet matches the template “A” respective refer to drawing on page 06.
b) Adjust the angle of the trailing edges of the wing and winglet with the aid of the
template “B” see also photo on page 05.
c) Damaged GFRP-cloth of the inner sandwich shell should be replaced by a 92125
diagonal.
d) After curing of the inner sandwich laminate check again the position of the winglet
with the aid of the templates “A” and “B”.
4. Bond end rib (I) to wing structure using thickened resin with winglet held in proper
position by the templates “A” and “B”.
5. After curing and trimming bond the wing suspension bolts in the wing rib (I).
6. Fit end rib (II) to wing tip cut off previously.
Thereafter insert spar tube (III) into GFRP tube on end rib (I), slide end rib (II) onto
spar tube (III).
Finally bond wing tip to end rib (II) (using thickened resin) - make sure that tip matches
the wing contour.
7. Drill hole (IV) (which takes up the locking pin in the winglet) through the wing structure
(first drill a hole with a diameter of 7 mm, then insert spar tube (III) for verification of the
proper position and finally enlarge the hole to a diameter of 8 mm).
8. Insert spar tube (III) into winglet and let the locking pin engage.
9. Bond spar tube (III) with winglet (securing bolt engaged) with resin and cotton flocks in
wing rib (I).
10. Copy the bore in the spar tube for the securing bolt to the wing tip. Drill first with 7 mm,
check the position of the hole then enlarge the hole to a diameter of 8 mm.
10. Do the paint work (if necessary).
/ 3

SCHEMPP-HIRTH
Flugzeugbau GmbH.
Kirchheim/Teck
cut-off line perpendicular
to upper surface of wing
94.13°
APPENDIX to
Technical Note No.
278 - 38
90°
90°
reference line
200 mm
[7.87 in.]
26.7 mm
[1.05 in.]
outwards from
90° reference line
cutting edge
wing tip
200 mm
[7.87 in.]
Page: 03
No. of pages: 06
/ 4

SCHEMPP-HIRTH
Flugzeugbau GmbH.
Kirchheim/Teck
50 mm
[1.97 in.]
winglet toe angle stop
100 mm
[3.94 in.]
400 mm
[15.75 in.]
Template "B"
(trailing edge)
winglet toe angle stop
WINGLET-MOUNTING TEMPLATES
APPENDIX to
Technical Note No.
278 - 38
86°
Template "A"
wing leading edge stop
Template "B" (trailing edge)
420 mm
[16.54 in.]
566
[22.28 in.]
93°
450 mm
[17.72. in.]
450 mm
[17.72 in.]
Page: 04
No. of pages: 06
120 mm
[4.72 in.] 379.5 mm
[14.94 in.]
winglet toe angle stop
Template "A" (port wing)
(bottom side for starboard wing)
86°
200 mm
[7.87 in.]
406 mm
[15.98 in.]
wing leading edge stop
900 mm
[35.43 in.]
/ 5

SCHEMPP-HIRTH
Flugzeugbau GmbH.
Kirchheim/Teck
Template "B"
(trailing edge)
APPENDIX to
Technical Note No.
278 - 38
winglet toe angle stop
Template "A"
Page: 05
No. of pages: 06
wing leading edge stop
/ 6

SCHEMPP-HIRTH
Flugzeugbau GmbH.
Kirchheim/Teck
Outboard wing with removable standard wing tip Outboard wing with removable winglet
toe angle - wing leading edge/
tangent line to lower surface of winglet profile
86°
IV
65
III
A B
IV
I
APPENDIX to
Technical Note No.
278 - 38
II
65 mm
[2.56 in.]
V
Ø8 mm
[Ø0.31 in.]
spar tube locking pin
Page: 06
No. of pages: 06
SECTION A-B