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+2 votes
asked by (18 points)
The f-4 will not lift off the ground until almost 200 knots are reached. I don't believe this is right. By the time the grear comes up the flaps are ripped off.
commented by (3.5k points)
Indeed, speeds do not seem to be very accurate on this F-4. Short test today at EHAM with X-plane 11.01b1

1 Answer

+1 vote
answered by (1.8k points)

Takeoff Safety Speed for F-4 is about 150 kts. You can read more here.

commented by (10 points)
I suspect XP flight characteristics for F-4s not very true -- try the following (from aircrew data cards):

Takeoff and landing speeds are mostly gross weight dependent

TO: clean gross ~42000# up to max 57000#

Landing: gross ~35000# up to ~45000#

For takeoff, half flaps, full AB power and full stick back, nose gear lift off (130-150kts), assume ~12deg pitch, mains lift off (160-180kts), gear &flaps up, maintain ~12deg until 350kts for climbout

For landing, reduce speed <250kts gear down, <220kts full flaps, approach ~140-160kts (calc: 130kts+2kts*each 1000# fuel/stores), maintain 19.2 AOA (green donut), no flare touchdown, power idle, drag chute deploy (decreases roll out ~1000ft), park, debrief, (if Friday) happy hour