Rectangular pine wood length, with chamfered edges and thirteen 25 mm diameter holes
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Two blade propeller wind tunnel model
1916-1970
Single blade propeller wind tunnel model
1916-1970
Three blade propeller wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model, inscribed with 'O' at drive shaft end
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model, inscribed with: 'S' at drive shaft end
1916-1970
Propeller blade wind tunnel model, parallel sides to square tip, pine wood
1916-1970
Propeller blade wind tunnel model, inscribed with: 'Y' at drive shaft end
1916-1970
Propeller: four bladed, wind tunnel model, with blades to prop shaft connector
1916-1970
Propeller blade wind tunnel model, inscribed with: 'S.I' at drive shaft end
1916-1970
Propeller blade wind tunnel model, tapered out to square tip
1916-1970
Propeller: four bladed, wind tunnel model, with blades to prop shaft connector
1916-1970
Propeller blade wind tunnel model, shortened to approx third of length
1916-1970
Propeller blade wind tunnel model, shortened to approx third of length
1916-1970
Propeller blade wind tunnel model, tapered out to square tip
1916-1970
Propeller blade wind tunnel model, parallel sides to square tip, pine wood
1916-1970
Rectangular pine wood length, with chamfered edges and forty three 25 mm diameter holes
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970
Propeller blade wind tunnel model
1916-1970