Interesting Departure Procedu MRB Trixy Two

Well, I pulled up the Garmin 500 sim and put 199 in for TRIXY in OBS mode.
This puts the 199 radial just about right through the BIITO BCM on the LOC
BC RWY 8. That fix is 3.9 miles west of the airport, and that runway is
7000 ft long. So, it would be about 5 miles to go 1300' from a field
elevation of 557, which is required by the 300' per NM in the ODP.

Now, the interesting thing was that I accidentally selected 199 from TRIXY
(as diagrammed) when I put the GPS in OBS mode after putting the DP in the
FPL. If you actually use the 199 radial from LDN as written, the point in
space is 1.15NM east of BIITO, but that's still 4 miles from MADNK (the
beginning of RWY 26). Just barely flying the minimum would put you 20
seconds past the 199 from LDN assuming a standard rate left turn. If
performance exceeds the minimums by 300' per nm, I would presume this is a
non-issue, but I could use some instrument DP practice.


--

Bob
PP-ASEL-IA, A/IGI

"Richard Kaplan" wrote in message
s.com...


Any other thoughts? Has anyone tried this "for real"?


--
Richard Kaplan, CFII

www.flyimc.com

Actually, "exceeds the minimums by 300' per nm" should read

"exceeds the minimums _of_ 300' per nm"

"Robert Henry" wrote in message
newsBWXb.39710$fZ6.13433@lakeread06...
Well, I pulled up the Garmin 500 sim and put 199 in for TRIXY in OBS mode.
This puts the 199 radial just about right through the BIITO BCM on the LOC
BC RWY 8. That fix is 3.9 miles west of the airport, and that runway is
7000 ft long. So, it would be about 5 miles to go 1300' from a field
elevation of 557, which is required by the 300' per NM in the ODP.

Now, the interesting thing was that I accidentally selected 199 from TRIXY
(as diagrammed) when I put the GPS in OBS mode after putting the DP in the
FPL. If you actually use the 199 radial from LDN as written, the point in
space is 1.15NM east of BIITO, but that's still 4 miles from MADNK (the
beginning of RWY 26). Just barely flying the minimum would put you 20
seconds past the 199 from LDN assuming a standard rate left turn. If
performance exceeds the minimums by 300' per nm, I would presume this is a
non-issue, but I could use some instrument DP practice.


--

Bob
PP-ASEL-IA, A/IGI

"Richard Kaplan" wrote in message
s.com...


Any other thoughts? Has anyone tried this "for real"?


--
Richard Kaplan, CFII

www.flyimc.com

"Robert Henry" wrote in message
newsBWXb.39710$fZ6.13433@lakeread06...

beginning of RWY 26). Just barely flying the minimum would put you 20
seconds past the 199 from LDN assuming a standard rate left turn. If

I flew the procedure with a student in my Cessna 210 simulator (which also
has a Garmin 530) and we reached the designated altitude significantly
before we crossed the radial. If the procedure were flown purely by VOR and
pilotage with no moving map, one could easily lose situational awareness at
that point.

Again, the Jepp charts depict this much better graphically, although I
realize only the text is legally binding.

--
Richard Kaplan, CFII

www.flyimc.com

"Richard Kaplan" wrote in message
s.com...

If the procedure were flown purely by VOR and
pilotage with no moving map, one could easily lose situational awareness
at
that point.

Again, the Jepp charts depict this much better graphically, although I
realize only the text is legally binding.

I wouldn't know about the Jepp - don't have it -, but you're right about the
in situ problem. I didn't even think about the 160 notation, which presumes
that flying through the radial is likely even though it is depicted as a
straight intercept to join the radial.

But I have to wonder why or how one would fly a DP and use pilotage in this
case.

Robert Henry wrote:

Well, I pulled up the Garmin 500 sim and put 199 in for TRIXY in OBS mode.
This puts the 199 radial just about right through the BIITO BCM on the LOC
BC RWY 8. That fix is 3.9 miles west of the airport, and that runway is
7000 ft long. So, it would be about 5 miles to go 1300' from a field
elevation of 557, which is required by the 300' per NM in the ODP.

It's 2.6 miles from the departure end of 26 to the radial assuming no VOR
system errors (not a good assumption unless you're using GPS). And, the 300
feet per mile is the minimum climb gradient. If my airplane does 500 feet per
mile I will be at 1,800 prior to the radial.