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Search: Posts Made By: Luc Lion
Showing results 1 to 35 of 270
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Forum: Tech Log
15th Apr 2024, 15:24
Replies: 18
Views: 1,451
Posted By Luc Lion

80 kt in 20 s is an average acceleration of 2.06...

80 kt in 20 s is an average acceleration of 2.06 m/s2 or 0.21 g (with no wind) and the distance rolled ~= 1350 ft.
With the same constant acceleration of 0.21g, 150 kt would be attained in 37.5 s...
Forum: Military Aviation
15th Apr 2024, 12:33
Replies: 10,223
Views: 4,558,621
Posted By Luc Lion

There is one smiling happy face though... in...

There is one smiling happy face though...

in a frame on the wall.
Forum: Tech Log
13th Apr 2024, 10:09
Replies: 3
Views: 1,072
Posted By Luc Lion

Even if you descend vertically, as long as you...

Even if you descend vertically, as long as you descend at a constant vertical speed, you experience a positive 1G.
If you want to experience negative G, you need to add a downwards vertical...
Forum: Military Aviation
9th Apr 2024, 15:30
Replies: 10,223
Views: 4,558,621
Posted By Luc Lion

Probably because targeting emergency responders...

Probably because targeting emergency responders is akin to a war crime.
And the Ukrainian army appears to have much less experienced professionals in war crime than the Russian army.
Forum: Tech Log
9th Apr 2024, 14:46
Replies: 22
Views: 3,897
Posted By Luc Lion

There was one task in the morning walkaround that...

There was one task in the morning walkaround that was always done by a techie, not by the pilot.
That was the propeller inflation.
Of course, with the advent of turbojet and turbofan engines, this...
Forum: Military Aviation
31st Mar 2024, 08:36
Replies: 10,223
Views: 4,558,621
Posted By Luc Lion

If one assumes that this bomb can glide at the...

If one assumes that this bomb can glide at the speed of a cruising ATR-72 which has a wing loading of 370 kg/m2, that a simple wing with no flaps adds 10% to the bomb weight for a total weight of 275...
Forum: Military Aviation
28th Mar 2024, 22:48
Replies: 10,223
Views: 4,558,621
Posted By Luc Lion

0.00000001 degree of latitude is 1.11 millimeter

0.00000001 degree of latitude is 1.11 millimeter
Forum: Military Aviation
28th Mar 2024, 22:39
Replies: 10,223
Views: 4,558,621
Posted By Luc Lion

If launched from an altitude of 30000 ft that's a...

If launched from an altitude of 30000 ft that's a glide ratio of 10, similar to the glide ratio of a small aircraft.
​No physical impossibility.
Just a matter of increasing substantially the aspect...
Forum: Tech Log
15th Mar 2024, 12:45
Replies: 5
Views: 1,316
Posted By Luc Lion

I fly RNP approaches in a single engine GA...

I fly RNP approaches in a single engine GA aircraft.
In most cases, the airport still has at least one conventional approach for the targeted runway and the RNP and conventional missed approaches...
Forum: Tech Log
14th Mar 2024, 15:51
Replies: 5
Views: 1,316
Posted By Luc Lion

It looks correct in the EASA world, with the...

It looks correct in the EASA world, with the proviso that point (b) and (c) in the AMC underneath allow for continuing the approach with specific conditions.
Point (b) if navigation systems offer...
Forum: Rumours & News
14th Mar 2024, 15:15
Replies: 409
Views: 183,901
Posted By Luc Lion

To avoid fraudulent admin access, some critical...

To avoid fraudulent admin access, some critical systems allow the login of a user in administrative mode only after another user in a lower role triggers a process which basically sets the stage as...
Forum: Military Aviation
27th Jan 2024, 05:37
Replies: 10,223
Views: 4,558,621
Posted By Luc Lion

Apologies, Meleagertoo, I was wrong and I only...

Apologies, Meleagertoo, I was wrong and I only undestand it now.
The blast that could be heard in the video is NOT the blast of the crash: it's too early and the blast of the crash should be audible...
Forum: Military Aviation
26th Jan 2024, 16:51
Replies: 10,223
Views: 4,558,621
Posted By Luc Lion

Meleagertoo, please watch again the X video...

Meleagertoo,
please watch again the X video showing the crash from a crossing inside the Yablonovo village and listen to the blast.

I measured the distance using this satellite picture of the...
Forum: Rumours & News
26th Jan 2024, 10:19
Replies: 24
Views: 12,393
Posted By Luc Lion

I don't understand laws that put such trespassers...

I don't understand laws that put such trespassers in prison.
Expulsing them make sense. Keeping them in administrative custody until expulsion make sense.
Fining them and freezing whatever asset...
Forum: Military Aviation
25th Jan 2024, 15:09
Replies: 10,223
Views: 4,558,621
Posted By Luc Lion

I think you're right. But the smoke still comes...

I think you're right.
But the smoke still comes from the initial fireball and still (mostly) evolves as I described.
That said, it is quite possible that the rod expansion distorts the mushroom but...
Forum: Military Aviation
25th Jan 2024, 13:50
Replies: 10,223
Views: 4,558,621
Posted By Luc Lion

No. A mushroom cloud just indicates that there...

No.
A mushroom cloud just indicates that there was a fireball at the place marked by its foot.
After an initial expansion phase in all directions, the heated air then starts to rise while still...
Forum: Military Aviation
25th Jan 2024, 11:42
Replies: 10,223
Views: 4,558,621
Posted By Luc Lion

There is another thing that doesn't add up with...

There is another thing that doesn't add up with the POW transport narrative in the IL-76 crash.

Just compare the fireball produced by the IL-76 with the fireball produced by the National Air...
Forum: Rumours & News
23rd Jan 2024, 10:09
Replies: 193
Views: 118,856
Posted By Luc Lion

I am surprised that the deviation from the...

I am surprised that the deviation from the stabilised approach which is at the inception of this incident is not analysed in this report.
The report states: "with a 6° left bank, and the wheel 17°...
Forum: Tech Log
18th Jan 2024, 10:26
Replies: 16
Views: 2,782
Posted By Luc Lion

Yes, such a wording is dangerous. It may infer...

Yes, such a wording is dangerous.
It may infer that the number of take-offs plus the number of landings can be an odd number...
Forum: Accidents and Close Calls
16th Jan 2024, 15:25
Replies: 1,146
Views: 1,046,130
Posted By Luc Lion

I didn't mention the causes of the incident in...

I didn't mention the causes of the incident in Bordeaux because it was obviously completely different from what happened in Haneda and I didn't want to appear to disparage controllers.
I just wanted...
Forum: Accidents and Close Calls
16th Jan 2024, 13:11
Replies: 1,146
Views: 1,046,130
Posted By Luc Lion

Only until Standard Mandarin Chinese or Hindi...

Only until Standard Mandarin Chinese or Hindi replaces it...
Forum: Accidents and Close Calls
16th Jan 2024, 12:15
Replies: 1,146
Views: 1,046,130
Posted By Luc Lion

aox, the circumstances of the Haneda accident...

aox,
the circumstances of the Haneda accident look to be that the Dash-8 crew thought to have received a clearance to line up and wait while they actually had received and read back a clearance to...
Forum: Accidents and Close Calls
16th Jan 2024, 11:51
Replies: 1,146
Views: 1,046,130
Posted By Luc Lion

ATC Watcher, Bergerie1, framer, I read and...

ATC Watcher, Bergerie1, framer,
I read and respect your reluctance to modify radio procedures.

However, I still think that, when a runway clearance has been issued long before executing it, it...
Forum: Rumours & News
16th Jan 2024, 11:22
Replies: 73
Views: 28,220
Posted By Luc Lion

I believe that, if someone is rude or yells at...

I believe that, if someone is rude or yells at you on the frequency, a good response is "Say again".
Forum: Accidents and Close Calls
12th Jan 2024, 11:13
Replies: 1,146
Views: 1,046,130
Posted By Luc Lion

There is one additional Reason plate that could...

There is one additional Reason plate that could be added at almost no cost.
The cost would be a handful of meetings at ICAO plus some "getting used to the new rules" for pilots and controllers.
...
Forum: Tech Log
3rd Jan 2024, 15:30
Replies: 7
Views: 1,328
Posted By Luc Lion

The torque or moment of force is simply the...

The torque or moment of force is simply the product of the force value by the arm length with which the force makes the object pivot around its center of gravity. That torque is the intensity of the...
Forum: Accidents and Close Calls
3rd Jan 2024, 14:22
Replies: 1,146
Views: 1,046,130
Posted By Luc Lion

For any pilot familiar with Haneda, are the...

For any pilot familiar with Haneda, are the statements "spot 18" and "spot 21" referring to parking pre-allocated spots? Is there a requirement to state the parking spot in the first message sent to...
Forum: Accidents and Close Calls
3rd Jan 2024, 14:10
Replies: 1,146
Views: 1,046,130
Posted By Luc Lion

Just to clear any potential misunderstanding,...

Just to clear any potential misunderstanding, JAL166 is NOT the landing aircraft involved in the accident (which is JAL516) but is the next aircraft in the approach sequence. It can be assumed that...
Forum: Tech Log
30th Nov 2023, 14:01
Replies: 8
Views: 1,748
Posted By Luc Lion

I just checked the official chart of EGSS...

I just checked the official chart of EGSS approach RNP Z R04 in the IAP, current Airac, here: https://www.aurora.nats.co.uk/htmlAIP/Publications/2023-11-30-AIRAC/graphics/359022.pdf
It does NOT...
Forum: Tech Log
27th Nov 2023, 12:05
Replies: 12
Views: 1,601
Posted By Luc Lion

Are you hinting that the river has been named...

Are you hinting that the river has been named "Wye" because of the angle it makes when it joins the Severn? :E
Forum: Tech Log
25th Nov 2023, 21:18
Replies: 15
Views: 891
Posted By Luc Lion

@Checkboard...

@Checkboard (https://www.pprune.org/members/2609-checkboard), that makes sense.
(unlike all the comments stating that piston engines are less reliable, do not feather, etc ; all things that are...
Forum: Tech Log
22nd Nov 2023, 09:09
Replies: 12
Views: 1,601
Posted By Luc Lion

I guess that "shibboleth" is also not part of...

I guess that "shibboleth" is also not part of these 2000 words.
Forum: Tech Log
21st Nov 2023, 21:24
Replies: 15
Views: 891
Posted By Luc Lion

That's the thought I had 23 years ago when I had...

That's the thought I had 23 years ago when I had to first learn that regulation.
And lately, it occurred to me that a reliable turbine engine with no fuel is as useless as a non reliable piston...
Forum: Tech Log
21st Nov 2023, 13:39
Replies: 12
Views: 1,601
Posted By Luc Lion

https://assets.publishing.service.gov.uk/media/58c...

https://assets.publishing.service.gov.uk/media/58c9159bed915d6035000174/Airbus_A320-214_G-EZWX_03-17.pdf


This image helps understand the link from the 3 electric motors to the 2 hydraulic...
Forum: Rumours & News
21st Nov 2023, 08:56
Replies: 445
Views: 127,868
Posted By Luc Lion

@safetypee...

@safetypee (https://www.pprune.org/members/62187-safetypee), I believe that this concept of system drifting process could also fairly describe the engineering of the B737 Max MCAS.
And, to be fair,...
Showing results 1 to 35 of 270
 
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