25-11-2017, 11:05 PM
In the trade, in days gone bye, (assuming the wings are Steel)we would SHRINK the pleats by using the oxy-acetylene torch, and heating the metal to red hot SPOTS, then dressing onto a dolly of similar profile to the wing. Final dressing can then be done with a "FLAPPER" sometimes called a "SPOON" These tools can be easily made by using an old file and shaping it to form the handle then sanding the teeth off to make the face smooth. If during final dressing LOW spots are found, these can either be lifted from the inside face with a "DIMPLING" hammer against a dolly then filed off. Alternatively the low spots can be lifted, by using a Flapper again, made with a file but this time (DON'T grind the teeth off) then by dressing the metal from the outside and shaped dolly on the inside, the teeth on the file will re-stretch the metal . The marks made by the teeth on the file can then be removed by filing.
In the case of Aluminium, the same procedure can be used but is made more difficult by the difference in the melting point of the material. Would recommend practice if using Aluminium.
In the case of Aluminium, the same procedure can be used but is made more difficult by the difference in the melting point of the material. Would recommend practice if using Aluminium.