Miscellaneous: Lesson Paper 18 – Developing the Surface of a Cowl (Original drawing)
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This is a very special document. Not only is it one of Andrew F. Johnson’s original hand drawings that date to the Technical School for Carriage Draftsmen and Mechanics, it also has the work, in Johnson’s own hand, for his calculations for the projections.
Miscellaneous: Lesson Paper 17 – Developing a Fletcher Cowl
Miscellaneous: Lesson Paper 16 – Developing the Surface of a Cowl (Original Drawing)
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This is another of Andrew F. Johnson’s original drawings that date to the Technical School for Carriage Draftsmen and Mechanics.
