Archived from groups: alt.games.microsoft.flight-sim (
More info?)
On Wed, 20 Apr 2005 17:44:24 +1000, "Trent Hopkinson"
<hoppys1@optusnet.com.au> brought the following to our attention:
>On the 767, the radar altitude will show *Roughly* 0ft when the mains touch
>down, and then -6ft (yes, 6ft under ground) when all the wheels are on the
>ground.
So that means..
you also monitor the RA during final moments of touchdown?
One cannot seem to tell (as in by feel) the height above runway in 2D
panel view.. some side monitors would help out.. wouldn't they?
That is.. with a resolution or certainty of ~10ft.
As Bill says.. would like to move the antenna to it's correct spot on
the fuse.. and then calibrate it (enter the correct offset from CTR).
Did some quick tests in SLEW mode.. and the RA increases from slewing
in ALT.. but doesn't change when slewing back on `tail strike' unit.
That proves the antenna isn't in the nose.
Hope this isn't being too much like `Joe engineer'.. and as usual have
clipped out a couple graphics (gauge views) from the testbed Boeing
panel where digital indicators are overlayed onto the analogue gauges:
http://mywebpages.comcast.net/flightsim/RA.gif < RA w/10' offset
http://mywebpages.comcast.net/flightsim/VS.gif < VS w/digital disp
Notice the RA analogue reads 0 but the digital reads 10. The VS
digital readout is ~10% different from the gauge.. maybe should go
back to ALL analogue for the old jet? Maybe should get into gauge
design and programming!! { grin }
-Gregory
----------
>"Jay Beckman" <jnsbeckman@cox.net> wrote in message
>
>> "Gregory" <flightsim.maps@bkwds.comcast.net> wrote in message
>>
>>> On Tue, 19 Apr 2005 23:57:49 GMT, "Lakeview Bill"
>>> <bdentonchi@hotmail.com> brought the following to our attention:
>>>
>>>>Realistically, you won't have time to monitor vertical speed during your landing.
>>>>
>>>>Just fly your approach at the proper speed, and use either the glideslope or
>>>>approach lights for vertical guidance and you'll be okay.
>>>>
>>>>And remember, right before touchdown, you will be doing a "flare", where you
>>>>pull the nose up, which reduces both forward speed and lift which will, if
>>>>you're good, allow the aircraft to settle gently onto the runway.
>>>
>>> Have a bad habit of monitoring the digital readout window in the RADAR
>>> Altimeter gauge on my Boeing jetliner panel. Maybe it's because the
>>> spatial relations to the ground aren't the best out cockpit windows.
>>> Funny thing is.. when the wheels touch down.. the RA is reading 10ft.
>>> Not calibrated too well.. has an offset you might say.
>>>
>>> Based on this.. what's the best way to break this habit and get
>>> smoother flares? Yep.. only pull up nose a couple or a few deg.
>>>
>>> i.e. look 1000' up ahead?? for instance?
>>>
>>>
>>> -G
>>>
>>
>> Impossible in a 2D world...
>>
>> Landing is soooo much a feel thing.
>>
>> yes, there are some numbers and keys to start with:
>> 1000' AGL on downwind...
>> Begin 500'/min descent abeam the numbers...
>> Turn Base when the numbers are 45 degrees behind you...
>> Turn Final as dictated by the winds (sooner in a tailwind...later in a
>> headwind...this is why pilots learn/use ground reference maneuvers...wind
>> compensation)
>> On final...pitch for speed...power to control rate of decent...
>>
>> Do you want a normal, a short or a soft-field landing? I prefer a
>> "modified soft-field" type of landing with maybe an extra 100RPM at the
>> flare to roll her on and not drop it on.
>>
>> And then it just becomes a feel thing...and it's almost all (90% IMO) done
>> with seat of the pants sensations and peripheral vision. I keep my head
>> and my eyes moving...scanning for traffic and constantly taking in the
>> visual picture...listening to my power settings and wind noise. You need
>> all five senses to fly.
>>
>> Too low...add some power
>> Too fast...raise the nose
>> Too high...pull some power (and maybe slip it a bit...)
>> Too slow...lower the nose
>>
>> Numbers moving up the windshield...you're gonna land short
>> Numbers moving down the windshield...you're gonna land long
>>
>> I'm kinda short, so in calm conditions, I like to land in a little bit of
>> a right forward slip which helps me see over the lower left corner of the
>> glareshield. I keep my gaze well down the runway, but I'm doing a lot of
>> near/far/near/far judgements to gauge when it's time to flare.
>>
>> FWIW (at least in a C172SP) the "perfect" flare = same deck angle as take
>> off and the stall horn is just starting to chirp at me when the wheels
>> kiss the pavement.
>>
>> Good Luck...
>>
>> Jay Beckman
>> PP-ASEL / Sim Pilot Too
>> Chandler, AZ
>>
>
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