What is the airfoil used in the SB13 flying wing? (Source)

What airfoil is used for the wing of this aircraft?
According to the Wikipedia Page on SB-13 Arcus, the airfoil used are,


  HQ 34N/14.83 at root, HQ 36N/15.12 at tip. Winglet Wortmann FX 7-L-150/K30