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Search: Posts Made By: fdr
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Forum: Tech Log
21st Sep 2022, 02:51
Replies: 114
Views: 28,303
Posted By fdr

As suggested previously, when encountering the...

As suggested previously, when encountering the longitudinal stability issue, Boeing could have completed aerodynamic mods to the design to remove the anomaly, which resulted from the nacelle adding...
Forum: Tech Log
3rd Feb 2021, 02:06
Replies: 114
Views: 28,303
Posted By fdr

K, for those wanting to stall any of these...

K, for those wanting to stall any of these aircraft, a note first up, there is a maintenance procedure for inspections after stall buffet encounter on most if not all of these aircraft. The amount of...
Forum: Tech Log
2nd Feb 2021, 14:45
Replies: 114
Views: 28,303
Posted By fdr

Strake flow effects are very predictable, with...

Strake flow effects are very predictable, with respect to core, rotational moment and stability. Additionally, interaction of a vortex flow with flow around an arbitrary body is quite accurately...
Forum: Tech Log
2nd Feb 2021, 14:44
Replies: 114
Views: 28,303
Posted By fdr

https://cimg6.ibsrv.net/gimg/pprune.org-vbulletin/...

https://cimg6.ibsrv.net/gimg/pprune.org-vbulletin/2000x1149/screen_shot_2021_02_02_at_11_17_27_pm_5db2b71153364dadb7a89221f95a3692ee75a9a4.png


...
Forum: Tech Log
2nd Feb 2021, 14:43
Replies: 114
Views: 28,303
Posted By fdr

Fair point. TBC was caught off guard by the A320...

Fair point. TBC was caught off guard by the A320 NEO, and having been led down the path of common type by the large fleet users, such as SWA etc, they were reticent in their planning to put out a...
Forum: Tech Log
2nd Feb 2021, 11:55
Replies: 114
Views: 28,303
Posted By fdr

Page 10 is worth the read of Ziegler's paper,...

Page 10 is worth the read of Ziegler's paper, particularly for those who were dismissive of the complexity of the task confronting the ET and Lion drivers. (I have the paper formatted in order if...
Forum: Tech Log
2nd Feb 2021, 11:35
Replies: 114
Views: 28,303
Posted By fdr

LE stall strips generally act to give a reliable...

LE stall strips generally act to give a reliable buffet signal to the driver from vortex impingement on the stabilizer, while that is nice to have, they generally don't act on altering the stall...
Forum: Tech Log
2nd Feb 2021, 05:21
Replies: 114
Views: 28,303
Posted By fdr

AIAA's JoA had every 2nd article in the early 90s...

AIAA's JoA had every 2nd article in the early 90s being CFD of the snout of the F/A-18, working on the flow instability at high alpha, about 1:10 of the remainder were dealing with the vortex...
Forum: Tech Log
2nd Feb 2021, 04:31
Replies: 114
Views: 28,303
Posted By fdr

Noted re flaps, however, the underlying issue is...

Noted re flaps, however, the underlying issue is this. The flow from the engine nacelles of fans under almost all wings results in a loss of CL in the area of the wing behind the nacelle. The...
Forum: Tech Log
31st Jan 2021, 05:30
Replies: 114
Views: 28,303
Posted By fdr

C* works nicely however it leads to the atrophy...

C* works nicely however it leads to the atrophy of procedures in the event of a law change, and that has led to a few rapid dissemble events. It is nice to fly though when working rite/write/right......
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