F-16's with the CFT's vortex pattern is better .

Always wondered why the F-16 has a tailhook, or how big a bigmouth F-16's mouth really is ? Find it out here !
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saberrider

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Unread post07 May 2017, 21:03

Look's like the F-16's with the CFT's have a better vortex distribution, covering more of the middle of the wings surface's and flaperons. There anybody there thinking the same?
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rheonomic

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Unread post08 May 2017, 03:45

For those with access to AIAA ARC, there's a good article on the design of the F-16 CFT:

C. Ciancarelli and K. Dorsett. "Optimizing the F-16 Conformal Fuel Tank using Design of Experiments", 18th Applied Aerodynamics Conference, Fluid Dynamics and Co-located Conferences, http://dx.doi.org/10.2514/6.2000-4522

The CFTs were designed to minimize the difference in flying qualities and performance to the basic non-CFT F-16. Stability-axis directional stability is maximized at high AOA to prevent departures.

I don't know if there's any public information about the CFT vortex flow.

There's another paper on the effect of the gun on the CFTs:

Eric Charlton and Atlee Cunningham. "F-16 CFT Design for Gunfire with CFD", 21st AIAA Applied Aerodynamics Conference, Fluid Dynamics and Co-located Conferences, http://dx.doi.org/10.2514/6.2003-3677
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Unread post08 May 2017, 10:09

The next step is standardization of CFT for all F16s across the Continent's. Why this it's not happened till now? That way you will have two more hard points for weapons .
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Unread post10 May 2017, 13:45

Only seen them on more recent F-16 airframes (e.g. B50/52 Advanced or Block 60) outside of the test ES aircraft - if it isn't just down to cost there could be some major changes needed as this text from codeone suggests:

All of these latest F-16s have structural, plumbing, and wiring provisions for the conformal tanks.

Did any older Vipers ever get them? - don't think so and they don't seem to be offered as part of F-16V upgrade.
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Unread post10 May 2017, 16:15

What is the g-limit for CFTs ? And are they CAT I or III ?
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Unread post10 May 2017, 16:54

They are Cat-I
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Unread post11 May 2017, 21:11

Thank you, What about g-limit (when full of fuel) ?
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Unread post11 May 2017, 21:13

The CFTs themselves have no G-limit beyond the basic aircraft limit. You are effectively just looking at gross weight vs total lift at this point.
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Unread post11 May 2017, 21:27

Thank you sprstdlyscottsmn.
Very interesting, because, with two CFTs (450 gallons in total) and one centerline tank (300 gallons), you still have a CAT-I and 9-g aircraft. I think it is a great deal for pure A-A missions (such as CAP).
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Unread post11 May 2017, 23:03

With full fuel you would not have a 9G aircraft. IIRC the F-16 is 9G up to 27,000lb which is full internal fuel and tip winders. Add 2,000lb CFTs, 500lb Centerline, and 5,000lb extra fuel and you are up to 34,500 with just tip Winders and are down to 7G. You may still be CAT-I, but that is more about the AoA-G logic than simply a G limit.

I don't have the HAF-1 in front of me so I am guesstimating the weight of the centerline but I am pretty certain the CFT equipped planes were 2,000lb heavier than the non CFT equipped planes.
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