I tried to describe to you the procedure for the manufacture of the blades of autogyro.
I used the google translation !!!!!!!
Manufacturing process of extruded blades for Gyroplane
Preparation
Pair the blades
Measure the twist of each blade and make the choice, the pair of blades must have the same twist. Maximum tolerance + XXX and - XXX.
Proceed as follows:
Weigh the weight of each blade. Maximum tolerance 20 grams for pairing.
Be careful to put the scale in the middle of the blade.
Saw the blades
Saw the exact blade length 1) 4000 mm, blade 2) 4000 mm with a fine-toothed saw.
Define the center of gravity of each blade
Take the heaviest blade as a reference.
Define its X and Y center of gravity using the triangle, mark with a felt-tip pen.
Mark with an erasable felt-tip pen on the blade a line from the outer end of the blade 1500mm above the extruded 12mm hole.
Mark with an erasable felt-tip pen on the blade a line from the outer end 2200mm above the 8mm extruded hole.
Proceed in the same way with the lightest blade.
Add on the lightest blade the difference in weight in grams with the heaviest using washers, distributing them between the 1,500 and 2,300mm points as needed to maintain the balance of the blade. The centers of gravity must be strictly identical between the two blades
Collage
Preparation of bars
heaviest blade:
Cut a bar of diam. 12 mm to 1,500 mm in length. Steel bar
Cut a bar of diam. 8mm to 2,200mm in length. Steel bar
lightest blade
Cut a bar from 12mm to 1,500mm + the length equivalent to the weight of the washers reported in mm of bar length.
Cut an 8mm bar at 2200mm + the length equivalent to the weight of the washers reported in mm of bar length.
Tapping
Tapping the entrances of the extruded holes at both ends of the blades with M10x1.75 and M14x1.5 thread length 20 mm
Inserts
For each blade proceed in the same way.
Clean the entering parts of the blades with acetone.
Prepare araldite 2011 50ml, acetone cleaner, a cloth, a syringe.
Place the same amount of araldite in the two blades at the entrance of the bars in holes 12 and 8 using the syringe.
Make the bars enter by turning them and putting glue along the bars during penetration. To distribute it well around the bars
Glue the inserts in the holes provided. The insert at the inner end to allow the blades to be tightened in the rotor head,
Heat the parts according to the table given by araldite either: 10 hours at 23 °, 45 min at 60 °, 7 min at 100 °.
Check and adjust the masses and centers of gravity of the blades
Drilling of the blade fixing holes on the blade holder
Inner blade
Fit the wedging profile in the drilling jig.
Secure the blade in the drilling template by pressing it against the outer end.
Gradually tighten the drilling jig and wedge the end of the blade with the cover at the end of the drilling jig.
Put the 9.6mm diameter guide and drill with a 9.5mm drill bit. These are the only through holes.
Change the guide to 10mm diameter to widen the hole with a 9.9mm drill bit.
Drill the other holes
Make a chamfer with the drill.
Remove burrs from each end of the hole.
Outer blade
Same procedure for all holes on the blades.
Use screws _ _ _ _ _ _
Final preparation
Balancing the rotor assembly
Fit and screw the blades onto the blade holder.
Screw the closing plates of the blades
Suspend the blade holder in balance using washers on the rising end.
Transfer the weight of the washers to the inside of the blade tip shim.
Glue the balancing screws with loctite.
Storage
Number the rooms.
Record the numbers in the logbook.
Pack the blades and the blade holder.