http://www.ABCAviation.com/AviationInfo/ModelAirplanesandHelicopters/index.php http://www.ABCAviation.com/rss/ModelAirplanesandHelicoptersTips.xml Model Airplanes and Helicopters from ABC Aviation You will wonder how airplanes stay in the air. There are four forces concerned for the plane to stay in the air and these are drag, thrust, lift, and weight. The lift force pushes the plane to go upward and the wings of the plane give the lift on it as air moves under the plane’s wings. The weight Thu, 14 Dec 2006 18:43:42 -0700 http://www.ABCAviation.com/AviationTips/5.php http://www.ABCAviation.com/AviationTips/5.php Maintenance of an aircraft is the main concern of every airline industries in the world. Because when the plane is in the air, any serious problems can put the life of every passenger in danger. Basically, an aircraft have two kinds of maintenance, these are scheduled and unscheduled maintenance. k Thu, 14 Dec 2006 18:43:42 -0700 http://www.ABCAviation.com/AviationTips/15.php http://www.ABCAviation.com/AviationTips/15.php Everything here is © ABC Aviation, Copyright 2006, All Rights Reserved Worldwide.