Thread: Yippee! HK Specter 1800
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Old Aug 17, 2012, 03:36 PM
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Las Cruces, New Mexico, United States
Joined Jun 2002
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+1 to Peter's summation. For those that may not know, the first number is the diameter, the second is the pitch. Diameter value governs the thrust produced and the pitch governs the speed produced. Diameter increases load on the motor by the 4th power, pitch increases by linear. A jump from a 9" to a 12" diameter is a huge increase, but 6 to 8 pitch in crease is not so much.
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