Definition
A fine-toothed hand saw with a rigid metal strip reinforcing the back edge of the blade. The reinforcement keeps the blade straight and stiff during cutting, allowing precise, controlled cuts in wood, plastics, and soft metals used in aircraft repair work.
Plain English
A small hand saw with a stiffening bar along its top edge. The bar keeps the blade from flexing, so the cut stays straight and accurate.
Context Anchor
Seen in aircraft maintenance, repair, or shop-work discussions when a precise hand cut is needed in wood, plastic, or other suitable material.
Derivation
Named for the reinforcing strip along the back of the blade. The 'back' is the stiffener; without it, the thin fine-toothed blade would bend during cutting.
Why Pilots Care
A pilot normally does not use a backsaw in flight, but may see the term in maintenance or repair material. Knowing it helps distinguish the correct tool from a general-purpose saw.
Intuition Check
A backsaw is not a saw used backward. The “back” is the stiff top edge that supports the blade.
Example Sentence 1
The technician used a backsaw to make a clean, straight cut in the spruce stringer.
Example Sentence 2
For fine joinery work on the aircraft's wooden structure, a backsaw provides the necessary rigidity.