Repair manual DG-800S content page issued Preface April 97 Definition of minor damage April 97 Tools and facilities required April 97 Material list for F R P repairs April 97 " " " " April 97 " " " "...
Repair manual DG-800S Preface The purpose of this repair manual is to provide basic repair instructions for minor damage to GFRP and CFRP gliders. (Glass and Carbon fibre reinforced plastics). Detailed information regarding all the processing of GFRP and CFRP is not given in this manual assuming that all repairwork will only be carried out by people with practical knowledge in the use of these materials.
Repair manual DG-800S Definition of minor damage Only the damage listed below can be considered as minor damage repairable by oneself. Any damage limited to gelcoat or filler. Holes in the fuselage underside where the average diameter does not exceed: Forward fuselage 80 mm (3 in.)
Repair manual DG-800S Tools and facilities required Tools - Accurate scale for the correct mixing of resin and hardener - Containers and wood mixing sticks - Brushes (short hair) to apply the resin - Metal roller to press down the glass cloth and to force the air out to...
Repair manual DG-800S Material list for FRP repairs Resinsystems for repairs Resin - Bakelite Rütapox L 20 with Hardener - Bakelite Rütapox SL 50 - mixing ratio 100:30 by weight or resin - MGS L 160 with hardener - H 163...
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Repair manual DG-800S Carbonfibre tape Sigri KDU 1009 7.5 cm (3 in) wide Carbonfibre rovings TOHO or TENAX HTA 24000 Diolenfabric (as core in the flaperons) C. Cramer style 14 K (158 g/m²) Foam Diab Divinycell H 60 colour green Röhm GmbH...
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Repair manual DG-800S Glue for Plexiglas To attach the canopy: glue Casco Nobel 1805 Foss Than 2K hardener Casco Nobel 1821 Curing Agent mixing ratio 3 : 1 by weight 2 : 1 by volume thickened with Aerosil. To repair cracks in the canopy: Röhm Acrifix 92 which hardens by exposure to light.
Repair manual DG-800S Instructions for FRP repairs Only materials listed in sect. 3 should be used. Only damage defined in sect. 2 should be repaired. Repair method for fibre reinforced plastics see sect. 2 and 3 5.3.1 Cut out damaged area, roughen the surrounding area for the overlap required see sect.
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Repair manual DG-800S 5.3.4 Repairing the outer skin of a sandwich panel Cut out the damaged area, remove the gelcoat over the overlap area +10 mm (0.4 in.) around the damaged area. Fill the damaged foam area with resin thickened with microballoons (microballoons-resin), let harden.
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Repair manual DG-800S Repairing small dents in a sandwich panel skin (no cracks in the gelcoat) Small dents can usually be removed by heating up to 60° to 70° C (140° - 158°F). Use a hot air blower to heat the area of the dent. The crushed foam will then spring back to its original form, so that the dent will hardly be seen.
Repair manual DG-800S Types of materials and overlap dimensions The following overlap dimensions are to be maintained. Use the materials given, see also pages 6 and 7.(Smaller reinforcements on high stressed areas are not given in the table below). Part overlap fabric type, etc.
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Repair manual DG-800S Part overlap fabric type, etc. (cm) (in.) d = + 45° l = + 90° _______________________________________________________________ Rudder outside 1 x 90070 d core H 60 - 3 mm thick Inside 1 x 90070 d _______________________________________________________________ Fuselage boom...
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