Isolated Masonry Piers 1. You may use hollow core concrete masonry units (concrete blocks) to build isolated masonry piers if the units are at least (â¥) 8 inches thick and not longer than (â¤) 3 times the unit thickness.
Strongrr New 7 Pcs Ulitmate Professional Precision Screwdrivers Repair Tool Kit for Hobby RC World's LARGEST GYRO RC HELICOPTER GYRO METAL 3.5CH RTF RC Helicopter 47 INCHES!! Only 5 left in stock - order soon. Only 3 left in stock - order soon.
Medium RC Helicopters have a main rotor diameter of 24 to 30. Most people consider them the best size CP helicopter, and this is justifiably so. They can take moderate wind, don't cost all too much, and are great for beginning to extreme 3D flight. Notice I said CP helicopter, any FP or coaxial this size is probably a piece of junk. Don't throw your money away on it.