Posted by Jerry/MT on June 19, 2011 at 17:27:44 from (206.183.116.129):
In Reply to: Way OT - Contrails posted by farmer boy on June 19, 2011 at 07:48:14:
I would imagine the wind is the biggest factor in dissipating (or not dissipating) a contrail since it"s really cold and dry at the altitudes that commercial airplanes fly at (~33K to 45K feet). The contrail is just condensation from the water vapor is the exhaust gasses.
The relative velocity between the air and the exhaust gas will affect how quick the exhaust gases mix with the much drier surrounding air. So a plane flying with a tail wind (usually east bound)will have a higher velocity difference between the exhaust gas velocity and the air speed and will mix faster than one with a headwind(flying westbound).
The SR-71(Blackbird) used a special fluid that was injected into the exhaust gasses on it"s engines to prevent formation of a contrail. Some very complex chemistry in that application. Of course it flew a lot higher altitudes then commercial airplanes and it certainly did not want to have it"s posiion noted with a contrail even though it was virtually untouchable by any SAM that the Soviets had.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Tractor Hydraulics - The Basics - by Curtis Von Fange. Hydraulics was one of the greatest inventions for helping man compound the work he can do. It’s amazing how a little floor jack can lift tons and tons of weight with just the flick of a handle. What’s even more amazing is that all the principals of hydraulic theory can be wrapped up in such a small package. This same package applies to any hydraulic system from the largest bulldozer to the oldest and smallest tractor. This short series will take a look at the basic layout of a simple hydraul
... [Read Article]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
