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All fuselages when overhauled are now checked as to their being in line, while the wire-tension is noted also.

There are three predominant factors when judging the relative merits of steel tube structures as used in Fokkers against the more orthodox constructional type of trussed fuselages with wooden longerons and wooden struts or wood and plywood monoceque fuselages.

In an article in "Het Vliegveld" of March, 1922, Mr. Takens. Technical Officer, R.D.N., attached to the Military Flying Corps as Works Engineers, draws attention to these points.

1st. Simplicity of overhaul and repairs.
2d.  General accessibility.
3d.  Damage done to machine and danger to pilots in crashes.

The steel tube construction scores under all three headings.

1st Nothing could be simpler than the overhaul of a steel fuselage. After stripping it of its fabric the naked structure is open to inspection from all sides.

It is easily cleaned or checked as to its being in line, repainted and ready for use again. Compare this with the overhaul of a woof and plywood fuselage, all soiled and soaked by oil which

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