2 simple questions
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Join Date: Apr 2000
Location: Hong Kong
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2 simple questions
1. Is there any 747-400F that has no winglet? If so, what's the rationale behind? Why doesn't 777 have winglet? I thought it helps to reduce drag, thus lowers SFC and increase range.. .. .2. What is the normal T/O distance required for a 330 on, say an ISA day with calm wind and at sea level.. .. .Cheers
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G`day, winglets have been a much discussed subject here at PPRuNeland. Have a look at the thread below, just about covers it...... .. .I saw an advert yesterday for sanitary towells, they had winglets - discuss...... .. .<a href="http://www.pprune.org/cgibin/ultimatebb.cgi?ubb=get_profile;u=00001699" target="_blank">http://www.pprune.org/cgibin/ultimatebb.cgi?ubb=get_profile;u=00001699</a>. .. .Regard, Speedbored
Join Date: Nov 2001
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To answer the second part of your Question 1: the 777 wing was designed for optimum curise performance, so no winglet is needed. Winglets are on the 747-400 to enhance performance but only as an add-on for later models (no winglets on 747-100/-200 etc)
Join Date: Nov 2001
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soar,. .. .as for your second Q, the T/O distance required for a particular takeoff is dependent on its' weight for a set of ambient condition.. .. .for our normal operations, we work things 'backwards'. we know the ambient conditions and the runway length. from that we work out what is our max. TO weight. thus, we know we can takeoff safely from any weights right up to the max. TO weight which we called Regulated TOW.. .. .hope this helps.... .. .SR
