Hey AJC,

If it matters, i regularly fly my skymaster f15 off a 600ft grass runway without problems. It has the Robart gear in it (likely the same to be used in the hawk) and haven't had a problem with it. They are really strong gear. I am also using the skymaster struts, wheels, and brakes and everyting works very nicely! I don't see why the hawk would have a problem off of a grass runway like you described.