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Search: Posts Made By: Le Flaneur
Showing results 1 to 28 of 28
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Forum: Tech Log
2nd Sep 2022, 21:27
Replies: 33
Views: 8,398
Posted By Le Flaneur

NASA and the FAA did ice crystal icing research...

NASA and the FAA did ice crystal icing research with a Falcon 20 and DC-8.

https://www.nasa.gov/aero/nasa-completes-high-ice-water-content-radar-flight-campaign-in-florida
Forum: Tech Log
31st May 2022, 00:47
Replies: 6
Views: 2,582
Posted By Le Flaneur

The B744 has a structural mode that is suppressed...

The B744 has a structural mode that is suppressed by the yaw dampers. It is not an issue with directional stability.
Forum: Tech Log
11th Jul 2021, 00:09
Replies: 19
Views: 5,426
Posted By Le Flaneur

The reason is it so easy to exceed VMO when...

The reason is it so easy to exceed VMO when descending at MMO is the aircraft is accelerating more quickly than does at normal descent Mach. In order to maintain MMO, the pitch must be constantly...
Forum: Tech Log
30th Apr 2020, 17:46
Replies: 4
Views: 1,344
Posted By Le Flaneur

Looks like the CV-990 MMO was 0.92 ...

Looks like the CV-990 MMO was 0.92
https://cimg5.ibsrv.net/gimg/pprune.org-vbulletin/761x1106/cv_990_2e812fa36f307abdcba128d974b2d46c0eeff075.png
..
Forum: Tech Log
11th Apr 2020, 15:56
Replies: 50
Views: 17,475
Posted By Le Flaneur

Older military aircraft often had INS/IRSs that...

Older military aircraft often had INS/IRSs that could be aligned inflight. An example is the USAF C-130Hs with self-contained navigation system (SCNS). Inflight INS alignment requires valid GPS or...
Forum: Tech Log
8th Apr 2020, 19:56
Replies: 3
Views: 608
Posted By Le Flaneur

With STAB off, you can use the radar as a back up...

With STAB off, you can use the radar as a back up horizon source.
Forum: Tech Log
7th Apr 2020, 21:56
Replies: 3
Views: 608
Posted By Le Flaneur

With stabilization ON, the radar antenna should...

With stabilization ON, the radar antenna should be stabilized to align with the local horizon. With STAB off, should be bore sighted along the fuselage.
Forum: Tech Log
22nd Mar 2020, 23:16
Replies: 8
Views: 2,718
Posted By Le Flaneur

Klaus Petzold's PDF, A CLOSER LOOK AT MECHANICAL...

Klaus Petzold's PDF, A CLOSER LOOK AT MECHANICAL AIR NAVIGATION COMPUTERS, is a treasure!
Forum: Tech Log
22nd Mar 2020, 23:06
Replies: 8
Views: 2,718
Posted By Le Flaneur

https://cimg9.ibsrv.net/gimg/pprune.org-vbulletin/...

https://cimg9.ibsrv.net/gimg/pprune.org-vbulletin/2000x1124/dscn4388_45fad706c1cd041a62a618fd5ef6ab024d9fab81.jpg
Whiz Wheel display at United Airlines Training Center (DEN-TK, circa 2014)...
Forum: Tech Log
17th Feb 2020, 16:13
Replies: 77
Views: 18,155
Posted By Le Flaneur

On flat-rated engines where N1 sets power (GE,...

On flat-rated engines where N1 sets power (GE, CFM), the OAT affects the N1 when using the assumed temperature method. This is because N1 is not constant below the corner point temperature. See...
Forum: Tech Log
12th Jan 2020, 18:26
Replies: 11
Views: 2,364
Posted By Le Flaneur

Most transport category aircraft are strongly...

Most transport category aircraft are strongly statically stable in all three axes; as a result there are relatively heavy control forces when maneuvering off the trim condition, when making large...
Forum: Tech Log
7th Dec 2019, 18:06
Replies: 14
Views: 4,602
Posted By Le Flaneur

Initially during rotation, the aircraft is...

Initially during rotation, the aircraft is rotating around the main gear, which is like having a really aft cg. The yoke input feels like an pitch acceleration command. Once the aircraft unsticks, it...
Forum: Tech Log
7th Dec 2019, 18:03
Replies: 5
Views: 1,345
Posted By Le Flaneur

Due to the rules used to determine wet runway...

Due to the rules used to determine wet runway takeoff distance (Accelerate-go to a screen height of 15 feet on wet runway vice a 35 foot screen height for a dry runway) and use of thrust reverse...
Forum: Tech Log
17th Sep 2019, 02:26
Replies: 24
Views: 11,128
Posted By Le Flaneur

The incident you are referencing was Delta Air...

The incident you are referencing was Delta Air Lines Flight 1080: https://en.wikipedia.org/wiki/Delta_Air_Lines_Flight_1080:

"During the takeoff, the L-1011's left elevator became stuck in a fully...
Forum: Tech Log
14th Sep 2019, 01:31
Replies: 24
Views: 11,128
Posted By Le Flaneur

The Danger of Generalization

I contend that AAMP video and the resulting simulator training were a contributing factor in AA 587 - reference 28:00 into the video where he talks about using top rudder. The AAMP and AA 587 were...
Forum: Tech Log
10th Sep 2019, 03:15
Replies: 3
Views: 4,033
Posted By Le Flaneur

Big Duke 6: By my read, there is a difference...

Big Duke 6:
By my read, there is a difference between XX03 and MMFO. XX03 is airspace not assigned to any country, so it does even have a class of airspace designated. MMFO is assigned to Mexico,...
Forum: Tech Log
6th Sep 2019, 22:26
Replies: 3
Views: 4,033
Posted By Le Flaneur

Airline operations in Mazatlan Oceanic FIR (MMFO)

Operations in Mazatlan Oceanic FIR/UIR (MMFO)

Mazatlan Oceanic FIR (MMFO), off the west coast of Mexico, is uncontrolled airspace. It is uncontrolled probably because historically there wasn't...
Forum: Tech Log
3rd Aug 2019, 17:25
Replies: 27
Views: 21,329
Posted By Le Flaneur

Post corrected, thanks for pointing out the error

Post corrected, thanks for pointing out the error
Forum: Tech Log
2nd Aug 2019, 17:11
Replies: 27
Views: 21,329
Posted By Le Flaneur

From the since rescinded US Air Force AFMAN...

From the since rescinded US Air Force AFMAN 11-217, Volume 3, page 65:

Turn Radius Calculation. The following two relationships provide the distance required to turn an aircraft 90° using 30° of...
Forum: Tech Log
8th Jun 2019, 00:31
Replies: 5
Views: 4,032
Posted By Le Flaneur

A321 buffet in the landing flare

As a passenger, I've noticed on several flights in the A321 ceo that there is an increase in light buffet during the landing flare. Does anyone know anything about this or I am imagining things?
Forum: Tech Log
8th Jun 2019, 00:20
Replies: 15
Views: 9,946
Posted By Le Flaneur

The C-17 engine is derivative of the PW 2000 used...

The C-17 engine is derivative of the PW 2000 used on the B757. In the C-17 they are flat rated to 40,400 lbsf to 30 C. I am sure there are other differences, but the biggest obvious difference is the...
Forum: Tech Log
23rd Mar 2019, 12:31
Replies: 195
Views: 133,071
Posted By Le Flaneur

B737 Max MCAS notes from before the Ethiopian Accident

Attached are some notes I made in mid-Jan 2019 regarding the MCAS architecture and Lion Air crash
Forum: Tech Log
3rd Dec 2018, 00:27
Replies: 5
Views: 2,610
Posted By Le Flaneur

I wouldn't fly through any thunderstorms, but...

I wouldn't fly through any thunderstorms, but here are my notes for flying around oceanic thunderstorms:

Oceanic thunderstorms (barotropic, meaning the storms formed in a front-less region of...
Forum: Tech Log
27th Oct 2018, 14:16
Replies: 14
Views: 4,456
Posted By Le Flaneur

I've successfully digitized graphs using Engauge...

I've successfully digitized graphs using Engauge Digitizer, an open source digitizer available for download on sourceforge. I will then curve fit using either Matlab or GNU Octave. I wouldn't use...
Forum: Tech Log
3rd Oct 2017, 04:51
Replies: 2
Views: 2,739
Posted By Le Flaneur

Outstanding!

Outstanding!
Forum: Tech Log
2nd Sep 2017, 16:45
Replies: 13
Views: 3,402
Posted By Le Flaneur

By starting the APU and bringing the APU...

By starting the APU and bringing the APU generator on line, the crew of 1549, kept the normal flight control laws (more importantly, the flight envelope protections) available.

This was...
Forum: Tech Log
12th Aug 2017, 01:51
Replies: 12
Views: 2,907
Posted By Le Flaneur

I have never flown an ERJ-145, but the general...

I have never flown an ERJ-145, but the general first order principle is this - any time you change the lift distribution (via flaps, spoilers, flow separation due to stall/Mach Buffet) on a swept...
Forum: Tech Log
17th Oct 2015, 19:15
Replies: 4
Views: 3,076
Posted By Le Flaneur

There are several things going on when you extend...

There are several things going on when you extend trailing edge flaps ---

1. You're increasing the lift due to increase in wing area and geometry. This results in a balloon. The C-17 deploys...
Showing results 1 to 28 of 28


 
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