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White Rabbit F5J

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This is my first stab at a full function TS glider.

Once again, Jef is the nudge behind the design and once again I am seeking comments and help etc on the layout and construction and in particular the power train.

I have used Sailplane Calc extensively with this model, Profili for the wing design and Draftsight to pull it all together. There is no rush, this is going to be a winter build and I have a F3-RES to build first.

So v2 is here - still some tweaking to do.


Some salient details based on a target AUW of 1500g (whether that target is achievable is debatable - I have a feeling that 1800g AUW will be a more realistic target)

  Total Span 3720.00mm

  Total Area 84.60dm2

  Wing Loading 17.73gr/dm2

  Mean Chord (area/span )227.42mm

  Mean Aerodynamic Chord (length) 231.32mm

  Wing Aspect Ratio16.36


Effective Wing Results (Projected)

  Total Span 3734.31mm

  Total Area 83.95dm2

  Mean Chord (area/span) 227.86mm

  Wing Loading 17.87gr/dm2

  Aspect Ratio 16.17

Wing section is an RG-15 and tail HT-21

Flaps on the inner panel and ailerons on the middle panels. How these get engineered I have yet to decide.

Wing will be constructed with C/F caps over solid balsa web/spars. I am also going to use a strip C/F TE as well. The LE D box will (possibly) be skinned with 0.2mm proskin (Jury is still out on this) and C/F cap strips over the wing ribs

6 panel polyhedral wing. My very limited experience with Aileron Thermal Soarer Glider wings is that the models seem to use Ailerons for roll control rather than steering, but then again that could be the wings that I saw. EDA is therefore at the bottom end of Mark Drelas design guide at 6.13 degrees 

Sailplane Calc threw out these numbers:


Any thoughts would be very welcome



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