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Features 17 Tackling the Demon Mike Williamson takes another close look at setting up a model heli’s tail system 30 A bit of a challenge We have a read through RC heli pioneer Len Mount’s fascinating autobiography 34 Letter from America Tim DiPeri gets into the workshop and fi ts and tests the latest Futaba GY-750 gyro 47 Hell-E-Cats Fly-in Martin briggs reports from a scale fl y-in organised by the Cheshire Hell-E-Cats 58 Zone 3D Competition Jamie Cole reports from the fi rst ever Zone extreme 3D knockout competition Regulars 04 Word of mouth The editor discusses the latest model helicopter goings on 06 Straight up The latest news from the world of RC model helicopters 38 Through the lens One of our favourite shots from this month’s collection 56 Cutting edge All the latest and greatest new model heli products 68 In tray More of your letters news and views 69 Next issue What to look forward to in RW issue 66 out in September 2011 71 Coming up The RW events listing updated for the 2011 season 72 UK buyers guide & classifi eds The best model heli shops products and services 73 Rotorworld subscriptions Get your favourite RC heli mag delivered to your door Reviews 10 Twister Police Helicam It’s a case of police camera action as Tom Stacey tests the latest coax machine 24 Silverlit Space Avengers Some more fabulous foam space raiders from Silverlit and Flying Toys 41 T-Rex 550E FBL Jamie Cole follows up last year’s T-Rex 550E test with a look at the Align 3G FBL conversion 52 Phoenixtech GT9 Can a budget priced gyro compete against more expensive and established brands? 64 Total G gyro Mark Christy tests out the gyro that promises much from Curtis Youngblood Enterprises