Hey mate
Listen mate, put a sock in it.
The 340 with RamVI’s and VG’s has a published time from takeoff roll to 100 kts of 15 seconds at GTOW. The time frame from VMC speed to Blueline, which is VYSE (also 100 kts), is about 6 seconds. The most critical timeframe is those magical seconds when you are still earthbound and accelerating through the VMC speed and the wings are starting to fly. The problem is the little bugger wants to fly like a blooming pigeon. Around 75 to 80 kts the wings just come alive like Elton John in front of a grand piano. Your flight instructors have beat into you the need to keep the bird on the ground until the wind going over the rudder reaches at least 91 kts. They did this so that in the event one of the engines craps out there will be enough wind over the tail to give you a bloody chance of surviving the mess. Now if your nose wheel is still on the ground around this time (speeds from 70 kts to 90 kts) you will still have some directional control if you lose an engine. If you pull the nose wheel up to soon, say at 75 kts, and you then lose an engine, it would be arse over elbow mate. You see, the bloody wind would not be strong enough to give your rudder, that’s the tall thing sticking up at the rear of the aeroplane, enough counter force to offset the asymmetric force of a 335 hp engine four foot off your centerline trying to yaw the nose over to that ditch next to the runway. The safest thing to do is stick to the plan, published rotation speeds, balanced field length, plenty of recurrent training and a heavy dose of common sense. If you do all of these things your friends will think you are simply brilliant.
Last edited by Lifeisgood; 11th May 2008 at 15:04.