Post by LOU on Mar 15th, 2011 at 2:45pm
pj747 wrote...
When on an ILS approach, when you're established on the localizer, the glideslope should take you at the right angle down to the airport on the VASI's. If 160 mean 160 knots you're way too slow for flaps 15 (or any flaps when not taking off) you should approach at about 180-190, and not get as low as V1 until within the decision height. You're too slow and the plane can't maintain altitude are the appropiate downward verticle speed because it can't obtain suffecient lift, when power is applied, the V/S goes more negative because the addition of power changes the pitch of the aircraft at the low speed, and you fall faster until dspeed is regained and it can keep the proper attitude.
???????
The canned speed for flaps 15 is 160 KTS!
As you track the LOC in level flight at flaps 15 & gear up, you should be at 160 KTS.
As the G/S comes alive, go gear down.
When the G/S gets to one dot, select flaps 30 and make small power adjustments to maintain "bug" +10 KTS for the rest of the approach.
The faster you go on the G/S, the higher the rate of descent. Anything over 1,000 FPM in descent is too high. At proper approach speed on a 3 degree G/S you should be in the 700 to 800 FPM range. Normal G/S is 300 feet per mile. For every mile you fly you descend 300 feet. If the ILS has DME readout you can use this 300' per mile and it will work out just fine. In fact on a LOC only approach or a VOR or NDB approach that is how you figure the descent.
Use the chart below to get the "bug" speed for the approach. It's called bug speed because of the little triangle reference bug on the airspeed indicator.
Even though this chart is for the -200 you can still get pretty close to -100 speeds.
Example: GW 150,000# Flaps 30 bug or Reference speed is: 132 KTS + 10 = 142 KTS
When on an ILS approach, when you're established on the localizer, the glideslope should take you at the right angle down to the airport on the VASI's. If 160 mean 160 knots you're way too slow for flaps 15 (or any flaps when not taking off) you should approach at about 180-190, and not get as low as V1 until within the decision height. You're too slow and the plane can't maintain altitude are the appropiate downward verticle speed because it can't obtain suffecient lift, when power is applied, the V/S goes more negative because the addition of power changes the pitch of the aircraft at the low speed, and you fall faster until dspeed is regained and it can keep the proper attitude.
???????
The canned speed for flaps 15 is 160 KTS!
As you track the LOC in level flight at flaps 15 & gear up, you should be at 160 KTS.
As the G/S comes alive, go gear down.
When the G/S gets to one dot, select flaps 30 and make small power adjustments to maintain "bug" +10 KTS for the rest of the approach.
The faster you go on the G/S, the higher the rate of descent. Anything over 1,000 FPM in descent is too high. At proper approach speed on a 3 degree G/S you should be in the 700 to 800 FPM range. Normal G/S is 300 feet per mile. For every mile you fly you descend 300 feet. If the ILS has DME readout you can use this 300' per mile and it will work out just fine. In fact on a LOC only approach or a VOR or NDB approach that is how you figure the descent.
Use the chart below to get the "bug" speed for the approach. It's called bug speed because of the little triangle reference bug on the airspeed indicator.
Even though this chart is for the -200 you can still get pretty close to -100 speeds.
Example: GW 150,000# Flaps 30 bug or Reference speed is: 132 KTS + 10 = 142 KTS
