Go Back  PPRuNe Forums > Non-Airline Forums > Private Flying
Reload this Page >

When to start turning from base leg to final?

Wikiposts
Search
Private Flying LAA/BMAA/BGA/BPA The sheer pleasure of flight.

When to start turning from base leg to final?

Thread Tools
 
Search this Thread
 
Old 9th Oct 2012, 20:55
  #21 (permalink)  
 
Join Date: Feb 2007
Location: Amsterdam
Posts: 4,598
Likes: 0
Received 0 Likes on 0 Posts
The circuit needs to be flown at 1000ft.
No, you need to look at the "AIP" (Aeronautical Information Publication) or the "A/FD" (Airfield/Facility Directory - a US thing) for the circuit height for the airfield involved. It can be anywhere between 700' and 1500'. And that's above aerodrome level (AAL) - it may be something completely different on the QNH ("altimeter setting" in MSFS).

decreasing to 600ft at the base/final turn (at say 1/2 mile out.) Do you watch the PAPIs on Final? They are at the 3deg glide-slope.
A three degree slope (the normal PAPI/ILS slope) is 2000 feet in 6 nm (6.2 to be precise). So at 1/2 nm out you should be at about 160 feet, and not at 600 feet.

In a light aircraft you can descend a lot steeper than the standard three degrees slope though, so 250-300 feet at 1/2 nm out is still doable, although you will have four whites on the PAPI at that stage.

600 feet at 1/2 nm? I'm pretty sure someone will come out of the woodwork claiming that they can do it with full flaps and full sideslip but if you're landing on a short runway it is probably prudent to start the go-around.

Heck, if you unintentionally end up in that position, you've probably done so much wrong already leading up to that moment that it's best to fly away from the circuit, orbit in a quiet spot for a while to gather your wits and think about what you've done, and then try again. (Or hit the P button in MSFS.)
BackPacker is offline  
Old 9th Oct 2012, 21:34
  #22 (permalink)  
 
Join Date: Sep 2006
Location: 23, Railway Cuttings, East Cheam
Age: 68
Posts: 3,115
Likes: 0
Received 0 Likes on 0 Posts
And you're allowed to screw it up the first time, it's the second circuit, when you've already seen what the wind is doing once, that you're supposed to get it right
I would assume that the better pilot would know what the wind was doing the first time around...
thing is offline  
Old 9th Oct 2012, 23:31
  #23 (permalink)  
 
Join Date: Oct 2011
Location: Sheffield
Posts: 18
Likes: 0
Received 0 Likes on 0 Posts
For VFR flying in MSFS, you need Track-IR imo - No point trying without!

I'm a brand new PPL and I've not landed at many places, but in no wind I was taught to turn when the furthest corner of the runway lines up with the nearest corner. With wind you turn a little before this point or a little after, depending on direction.

It works where I've flown, and it works in MSFS (With your Track-IR!). I guess as I step out I may well need to get a more sophisticated method and there's some very useful info in this thread. Thanks guys.

Ian
ianwild is offline  
Old 10th Oct 2012, 00:15
  #24 (permalink)  
 
Join Date: Jan 2001
Location: In the boot of my car!
Posts: 5,982
Likes: 0
Received 0 Likes on 0 Posts
Think it was the military who flew curved approaches from downwind curving right onto final!
The idea of any approach and a circuit is an approach is to get you onto the runway to land not 1 mile out 2 miles out 3 miles out etc. Theoretically it could be just before you touchdown!
Wherever you hit the centreline is the point that coincides with the correct altitude for roughly a 3 degree glide.
6 miles 2000 feet 3 miles 1000 feet 1.5 miles 500 feet etc is a rough guide that is easy to remember and calculate.
In many ways it is probably better to visually extend the centreline and pick a prominent spot on the centre line like a farm or whatever and use that as a visual final approach fix. That is what you will fly over at a given altitude depending on an estimated distance from the runway.
Be 90 degrees to that point and passing 90 degrees start a curving approach.
may not be an official way but it works

Pace

Last edited by Pace; 10th Oct 2012 at 00:20.
Pace is offline  
Old 10th Oct 2012, 17:10
  #25 (permalink)  
 
Join Date: Sep 2006
Location: 23, Railway Cuttings, East Cheam
Age: 68
Posts: 3,115
Likes: 0
Received 0 Likes on 0 Posts
Think it was the military who flew curved approaches from downwind curving right onto final!
Still do, we do oval ccts at Waddo.

Last edited by thing; 10th Oct 2012 at 17:11.
thing is offline  
Old 15th Oct 2012, 19:36
  #26 (permalink)  
 
Join Date: Oct 2011
Location: In a hole somewhere
Age: 46
Posts: 378
Likes: 0
Received 0 Likes on 0 Posts
When to start turning from base leg to final?

Im with thing on this one..... Jeese i got a real issue with this sort of thing.

Fly it!
Pilot.Lyons is offline  
Old 15th Oct 2012, 20:06
  #27 (permalink)  
 
Join Date: Jul 2012
Location: Scotland
Posts: 158
Likes: 0
Received 0 Likes on 0 Posts
I'm a fan of the curved approach too but even when that's not appropriate I like Base to be about in line with the end of the runway, certainly not outside the perimeter fence.
DeltaV is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.