the challenge is to use one jet, 2 small wings and one rudder, this is your choice to have 1-4 rockomax 48-7s this can help you for vertical take off/landings the rockets are not required in the challenge but if you want to use them . it is required to have a Kerbal in a seat not a cockpit/capsule This is required the part limit is 20 The wings you can use (including rudders) standard canard advanced canard tail fin Delta deluxe winglet av-t1 winglet small control surface standard control surface fuel is 1-2 fl-t100 fuel tank(s) extra challenge easy: take off like a plane and land at the island airport normal: do a vertical take off and land like a plane OR take of like a plane and land vertically in the water hard: take off like a plane and land on top of the vehicle assembly building you can use the B9_Aerospace mod, its your choice