Can anybody shed some light on the accuracy of the airflow around the fuselage on the attached image? The wing is based on the GM15 foil. Rest of the details is in the picture. The modeling was done with XFLR5.

Does the results of lift, drag etc look credible?

Sarel Wagner

Views: 631

Comment by Spencer Riggs on September 30, 2009 at 5:37am
The numbers look correct to me at a first glance. I would have to do the analysis myself to verify, but everything looks reasonable.
Comment by Sarel P. Wagner on September 30, 2009 at 5:41am
Will it help if I send you the XFLR5 file on this?

Comment by Spencer Riggs on September 30, 2009 at 7:57am
I need to check if I have XFLR5 on my laptop, but I probably would not get to it until this weekend at the earliest.
Comment by Sarel P. Wagner on September 30, 2009 at 9:48am
Thank you indeed, if you have the time, I'll send you the file, let me know...

Thank you
Comment by Spencer Riggs on October 1, 2009 at 7:14am
No problem. Send it to and I will take a look.

Comment by crystal garris on October 4, 2009 at 7:43pm
you have to render the fuse in polygon , the spline mode you are displaying is not included in the vortex lattice and is not calculated
Comment by tshado on April 27, 2010 at 8:09am
Hello wayne,
I have a small knowledge in Airplane Aerodynamics but willing to improve it !!
Could you please give some details or explanations about your comment ?

Best regards, Jean-Claude
Comment by Shane Martin Coughlan on July 6, 2012 at 3:05am

It looks like this project has stalled (also in another thread:

However, perhaps everyone will be interested to note that an Open Source Airframe has just been released by the OpenRelief project. 

Here is an overview of the specs:  
* Length 1.4 meters
* Wing span 1.8 meters
* Chord 30cm
* Uses counter-rotating motors (redundancy, speed, balance, no torque)
* Uses remote servos (wing flaperons, the tail surface) for more storage and ease of repair
* Empty weight 3kg
* Thrust is 12kgs
* Max load 12kg (lift at 100mph/160kph is approx 12kg)
* Endurance is between 1 to 4 hours with existing specifications
* Wings can be repositioned to change CoG for large payloads
* Stringers located on the fuselage to carry the wing, landing gear and other items (modules)
* These channels also hold internal items like the motor via bulkhead rings, for quick changes
* Fuselage can carry liquids (same diameter as 2L bottle of cola)
* Can be launched by rail and use parachute recovery
* Can be fitted with front wheels for conventional landing in rough fields

You can find out more here:


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