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Larry Morgan of Variprop got back with me today (they were out of the country, and the e-mail link in website is out of date) and a 3-blade unit will weigh 33lbs (2 blade is about 5lb less) on the prop flange. depth is about 7". He also tells me they are now making higher horsepower units in the 450-500 range for the military UAV market.
Cost $7995 for 3 blade, 2 blade is $500 less.
C. Smith