The term variable-pitch propeller is identified in base64 scheme by the sequence dmFyaWFibGUtcGl0Y2ggcHJvcGVsbGVy, while the MD5 signature is equal to 9210c06d5974f73b3e2d31461361ce74. The ASCII encoding of variable-pitch propeller in hexadecimal notation is 7661726961626c652d70697463682070726f70656c6c6572.