Rough guess about drag of Tip Tanks in a small GA plane???

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Rough guess about drag of Tip Tanks in a small GA plane???

Postby snippyfsxer » Mon May 10, 2010 1:57 pm

I'm using several real life "hands on" reviews of an airplane to fine tune tune its counterpart in FSX.
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Re: Rough guess about drag of Tip Tanks in a small GA plane???

Postby Tomcat5 » Mon May 10, 2010 6:13 pm

What is the head-on area of these tip tanks?  Are they streamlined, or what?  Can you give me a screenshot?
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Re: Rough guess about drag of Tip Tanks in a small GA plane???

Postby snippyfsxer » Mon May 10, 2010 7:55 pm

Sorry, this is the PA-30B, Twin Comanche.
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Re: Rough guess about drag of Tip Tanks in a small GA plane???

Postby Tomcat5 » Tue May 11, 2010 3:28 pm

I don't think it would matter much, maybe you would lose about 5 kts.  I have never been an aviator, so I wouldn't know.  Maybe someone else would know more than me.  Again, maybe about 5 knots, certainly not more than 10.
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Re: Rough guess about drag of Tip Tanks in a small GA plane???

Postby snippyfsxer » Tue May 11, 2010 10:06 pm

Nevermind about this.  Surprisingly, some back of the envelope calcs and some additional web searches indicates that for these sizes of tip tanks at these speeds, the drag difference might only chop your cruising speed at most a knot or two;  In other words, not worth accounting for within the fidelity of our sim or simulated guages.  This is surprising to me, but I'm pretty sure that is the correct answer.
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