How Well Do You Know X-Planes?Take the quiz below to find out how well you know X-planes! This X-plane was the first aircraft to fly with variable wing sweep. X-4 X-15 X-14 X-5 Correct!Wrong!- Continue >> X-12 Vertijet X-13 Vertijet X-13 VTOLjet X-12 ILandFunnyJet Correct!Wrong!- Continue >>This is the first aircraft to exceed Mach 3. X-15 X-7 X-1 X-2 Correct!Wrong!- Continue >>This is the first manned hypersonic aircraft. X-13 X-15 X-14 X-17 Correct!Wrong!- Continue >> X-49 X-19 X-31 X-29 Correct!Wrong!- Continue >> X-4 BatJet X-3 Stiletto X-3 Dart X-4 Dart Correct!Wrong!- Continue >>This is the first aircraft to break the sound barrier in level flight. X-10 Y-1 X-1 X-2 Correct!Wrong!- Continue >> X-19 X-13 X-14 X-9 Correct!Wrong!- Continue >> X-18 X-2 X-19A X-15 Correct!Wrong!- Continue >> X-22C X-32B X-35A X-30Z Correct!Wrong!- Continue >> X-40 X-49A X-37B X-38 Correct!Wrong!- Continue >> X-48 Hyperhawk X-48 Speedhwak X-49 Hyperhawk X-49 Speedhawk Correct!Wrong!- Continue >> X-27 Waverider X-28 Sea Skimmer X-29B X-27 SkyWalker Correct!Wrong!- Continue >> X-49A X-49B X-46A X-47B Correct!Wrong!- Continue >> X-G X-31 X-45 X-50 Correct!Wrong!- Continue >> Share the quiz to show your results ! Facebook Facebook Just tell us who you are to view your results ! Show my results >> How Well Do You Know X-Planes I got %%score%% of %%total%% right Share your results Twitter ↺ PLAY AGAIN ! 0% Subscribe Notify of new follow-up commentsnew replies to my comments Label {} [+] Name* Email* Website Current ye@r * Leave this field empty Label {} [+] Name* Email* Website Current ye@r * Leave this field empty 0 Comments Inline FeedbacksView all comments