2007-03-05 17:49:11 · 6 answers · asked by robbiecanadian 2 in Cars & Transportation ➔ Aircraft
For the C172 I fly (a 1982 Model), with the engine running, at 1700 rpm, carb heat on, flaps set at standard.
In Still Air:
Downwind - 80 Knots, 10 degrees flaps
Base - 70 Knots, 20 degrees flaps
Final - 60 Knots, 30 degrees flaps
Taking into consideration crosswind factors:
Crosswind factor of 10 knots:
Downwind - 80 Knots, 10 degrees flaps
Base - 70 to 75 Knots, 10-20 degrees flaps
Final - 65 Knots, 10-30 degrees flaps, depending on conditions
And as others have said, check the POH. And ask an instructor, if you want further explanation. Airspeeds to use is dependant on a variety of factors, and should be adjusted based on conditions.
2007-03-06 02:16:03 · answer #1 · answered by Leopold 2 · 0⤊ 0⤋
Precautionary for what? Short field, gusty winds, gross weight? Your "cautionary" speeds will vary based on your object and situation. For a short field you will come in slower so as to not overshoot the runway; in gusty conditions you will come in higher than normal (65+ knots on final) and at gross you will want to maintain your airspeed precisely as your wing loading will be greater and the stall speed higher. Generally speaking though, you'll want to be between 60-65 knots on final for most conditions.
2007-03-06 14:17:18 · answer #2 · answered by ncolton22 2 · 0⤊ 0⤋
60 knots is the best approach speed.
2007-03-06 19:59:28 · answer #3 · answered by Leon 5 · 0⤊ 0⤋
I agree with ZORCH, read the POH, thats what its there for, You might learn some other important things too.
2007-03-06 10:00:32 · answer #4 · answered by wAHAw 1 · 0⤊ 0⤋
You should also take into account the wind gradient in strong wind conditions.
2007-03-06 04:10:12 · answer #5 · answered by Ranjeeh D 5 · 0⤊ 1⤋
It is in the manual, which should be in the aircraft.
2007-03-06 01:54:29 · answer #6 · answered by ZORCH 6 · 0⤊ 0⤋