Can anyone tell me about the weight of engines? I was just looking at a picture of a Trident, and it struck me that those engines must be very heavy. Same with DC10, Tristar,727 etc. Now,it seems that all lof the weight is at the rear end of the airplanes and it seems to me that there is no weight at the front to counterbalance the weight of the engines.So how does the airplane stay level without tipping backwards? Also, to show my ignorance in such matters, I see these truck size engines hanging under the wings of airplanes and (now I am ducking!) I have to wonder why the wings don't snap off from the weight. Can anyone tell me how much tonnage say, a 747 has got hanging under the wings? Guys, make allowances for this old sea dog's ignorance. I know ships but not airplanes. Thanks. Peter.