Archived from groups: alt.games.microsoft.flight-sim (
More info?)
HI boB,
Leaving your post AND mine in --please see toward the bottom for my
additional comments--inserted.
"boB" <akitaREMOVECAPS77@excite.Icom> wrote in message
news:RWvhe.87096$hu5.45993@tornado.texas.rr.com...
> Paul Riley wrote:
>
>> "boB" <akitaREMOVECAPS77@excite.Icom> wrote in message
>> news:wphhe.86596$hu5.7583@tornado.texas.rr.com...
>>
>>>Since I hated instrument flying for 25 years I always leave the IFR
>>>questions to those more knowledgeable in the mystic procedures called
>>>"flying blind"
>>>
>>>But since I had a humorous incident on my very first IFR checkride.
>>>
>>>First though, the dual needle RMI has a thin arrow which points to your
>>>NDB station (or AM Radio Station) that you have tuned on your ADF. The
>>>second, and wider needle is for your VOR, usually VOR #1.
>>>
>>>So here's a teaser for some of the iffer pilots. On my initial checkride
>>>I had a stuck card failure. The face of the RMI no longer turned. If
>>>it's
>>>stuck on 270 degrees say, no matter where you turn or what heading you
>>>fly, the RMI face is stuck showing 270 degrees. The needles are operative
>>>and are correct. The MAG Compass shows the heading to be 090 Degrees.
>>>
>>>The #1 needle is pointed 90 degrees to the right of the 12 o'clock
>>>position (270) of the RMI which, if I'm not wrong, would be pointed at
>>>the
>>>number 360 or 0, whatever.
>>>
>>>And the #2 needle (VOR) is pointed left 90 degrees from the top of the
>>>RMI, which, if I'm correct, pointing at the number 180.
>>>
>>>Let's make it easy. Say you wanted to track inbound from your present
>>>position to the NDB. Which direction would you turn the aircraft and how
>>>many degrees would you turn. When you roll out on the inbound track, what
>>>would the Mag Compass show? (Plus or minus, I know by the time the turn
>>>is completed you might be showing a track inbound a couple degrees off)
>>>
>>>
>>>
>>>But before you turn you suddenly realize you need to go to the VOR that
>>>you have tuned in.
>>>
>>>
>>>(Remember- the #2 needle (VOR) is pointed left 90 degrees from the top of
>>>the RMI, which, if I'm correct, pointing at the number 180.)
>>>
>>>To track inbound to the VOR from your present position, which direction
>>>would you turn the aircraft and how many degrees? What heading would show
>>>on the Mag Compass when you were leveled off and tracking inbound?
>>>
>>>--
>>>
>>>boB,
>>>Master_Caution_70
>>>
>>>U.S. Army Aviation (retired)
>>>Central Texas - 5NM West of Gray Army Airfield (KGRK)
>>
>>
>> Hi boB,
>>
>> The first 5 years I was flying instruments (FW only), all we had in the
>> L-20
>> and TL-19D was a fixed card ADF. And RMI was unheard of then--our "rich
>> uncle" did not believe in spending money on frivolous stuff!
)
>>
>> So what you describe is nothing more than a fixed card situation with the
>> RMI that is the same as with the old ADF indicators. Needles are working
>> correctly and show a RELATIVE BEARING from the nose of the aircraft TO
>> the
>> station in question. In any case, fixed card OR moving card, the nose of
>> either needle will always point TO the respective station.
>>
>> To go to the NDB, turn RIGHT 90 degrees to a heading of 180 on the mag
>> compass. To go to the VOR, turn LEFT 90 degrees to a heading of 360 on
>> the mag compass. For starters.
>>
>> This heading is only correct momentarily, since wind will have an effect
>> on
>> your track. Remember, "push on the nose, pull on the tail" of a needle,
>> depending on whether you are tracking TO or FROM the station
>> respectively.
>> Once you have the initial track determined, then wind correction to
>> maintain
>> that track is the same process whether you are using a fixed card or
>> moving
>> card.
>
>> Regards,
>> Paul
>>
>
> Yep, the ADF needle always points to the station so turn right 90 degrees
> to a heading of 180.
>
> But a stuck card RMI is different. The VOR needle will always point to
> the heading required to get to the VOR. So the VOR needle is pointing left
> 90 degrees to a heading of 360 degrees. You turn left to 360 degrees.
> Maintaining a straight ground track is a workload.
OK, this is confusing. Typo maybe. You said the #2 needle is pointed LEFT 90
degrees on the "fixed" card, which as you also said, is 180. I agree with
that, since the top of the card is now reading 270 So with the VOR on a
fixed, frozen card RMI always pointing to the heading to the VOR (different
than an ADF in this case), then it would have to be pointing RIGHT 90
degrees to make 360 the heading to the station. Otherwise, the heading to
the VOR station is 180, not 360 with the needle 90 left. And I would turn
RIGHT from my current aircraft heading of 090.
On the other hand, if it is a relative bearing to the VOR as I was thinking
then 90 degrees LEFT of the aircraft heading of 090 is 360.
I really do not remember this point, but accept what you say as far as the
difference between ADF needle and VOR needle with fixed RMI card. To be
honest, I have not gone into any of this in ~ 30 years, so will plead senior
moment.
)) Would appreciate clarification though.
Regards,
Paul
PS This would be a lot easier if we could both sit down together with paper
and pencil over a couple of beers
)
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