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What airfoil design does the MQ-9 Reaper UAV use? Alternatively, what similar airfoil designs exist?

I'm running simulations for the effects of vortex generators for a school project and I would like to study the Reaper drones.

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    $\begingroup$ I'd suggest using gliders as they have a lot more published data, and even vortex generator studies in the open literature. Military aircraft and UAV's do not generally have data for the public eyes. If it's a school project, you'll be at safer grounds in publishing your results too. $\endgroup$ – Gürkan Çetin Nov 5 '17 at 19:09
  • $\begingroup$ Use the GA(W)-1 as a replacement. It should not be too different and a lot of work on it has been published. $\endgroup$ – Peter Kämpf Nov 6 '17 at 13:26
  • $\begingroup$ GA(W)-1 by no means at all close to GW series airfoils. GW series in intended to fly ~1-0.5 Million RN while GA(W) is intended to fly ~10 million. And operating CL range is also very different. $\endgroup$ – ABCD Jun 15 '18 at 10:49
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The wing root of the General Atomics RQ-9 is the Drela GW-19/GW-25.

The wing tip airfoil is the Drela GW-27.

Because of their application, you will likely have difficulty finding study results of vortex generators used on that blended airfoil. There are papers, but I have only seen them in the DTIC library, and I do not recall the classification of them. However, the aircraft has been exported, so you may find some open literature on the airfoil, and the adaptations and optimization of it.

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Similar airfoil if you go higher Reynolds number is NLF 1015 and NASA LRN 1015. One paper specifically investigated what you have suggested above is this.

AIAA-2003-0211 Enhanced Airfoil Design Incorporating Boundary Layer Mixing Devices Michael Kerho and Brian Kramer

On the original airfoil design without vortex generators.

THE DESIGN. OF AN AIRFOIL. FOR. A HIGH-ALTITUDE,. LONG-ENDURANCE. REMOTELY. PILOTED. VEHICLE. N9 0- 12 545. Mark. D. Maughmer.

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