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Search: Posts Made By: Mad (Flt) Scientist
Showing results 1 to 35 of 1000
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Forum: Accidents and Close Calls
31st Jul 2023, 18:47
Replies: 75
Views: 35,152
Posted By Mad (Flt) Scientist

The upscaled video just above your post seems to...

The upscaled video just above your post seems to show a ragged edge of the leading edge, suggesting that it was indeed damaged as you suggest. That would definitely not aid controllability.
Forum: Tech Log
17th May 2023, 13:13
Replies: 12
Views: 1,515
Posted By Mad (Flt) Scientist

An alternative to using the actual +/- physical...

An alternative to using the actual +/- physical stab position - which does have a risk of the +/- confusion, or even the "-" sign being dropped from the display, leading to an apparent positive value...
Forum: Tech Log
15th May 2023, 16:32
Replies: 12
Views: 1,515
Posted By Mad (Flt) Scientist

For specific values of "safe". ;-) The...

For specific values of "safe". ;-)

The mistrimmed takeoff tests for certification generally consider the stab at one end of the band and the aircraft (weight, CG, etc) corresponding to the other...
Forum: Accidents and Close Calls
6th Mar 2023, 12:23
Replies: 37
Views: 15,333
Posted By Mad (Flt) Scientist

I believe he is saying that fools, who are unable...

I believe he is saying that fools, who are unable to judge when to wear a seat belt, should just follow the rules, whereas "wise men" who understand the risks will (a) wear them even without rules,...
Forum: Tech Log
22nd Nov 2022, 13:33
Replies: 8
Views: 1,815
Posted By Mad (Flt) Scientist

If you know your surfaces are clean, or that...

If you know your surfaces are clean, or that you've not operated on a contam surface and the flaps have been stowed the whole time when exposed to contam then de-icing and then anti-icing with flaps...
Forum: Accidents and Close Calls
25th Jan 2022, 14:10
Replies: 4
Views: 1,577
Posted By Mad (Flt) Scientist

But how far do you take your paranoia? A check...

But how far do you take your paranoia?
A check that the spoilers are all stowed when you expect them to be won't catch that they are not deploying when you want them deployed, or are deploying...
Forum: Flight Testing
13th Dec 2021, 19:34
Replies: 8
Views: 1,447
Posted By Mad (Flt) Scientist

Doesn't a focus strictly on "minimum energy to...

Doesn't a focus strictly on "minimum energy to altitude" without addressing distance travelled give the wrong optimisation for an aeroplane that wants to actually go somewhere ... a very steep path...
Forum: Accidents and Close Calls
29th Oct 2021, 19:53
Replies: 89
Views: 94,761
Posted By Mad (Flt) Scientist

For anyone interested - and there are some...

For anyone interested - and there are some interesting aspects - TSB published the report this week:

https://www.tsb.gc.ca/eng/rapports-reports/aviation/2017/a17c0146/a17c0146.pdf
Forum: Accidents and Close Calls
30th Sep 2021, 19:37
Replies: 19
Views: 5,472
Posted By Mad (Flt) Scientist

The issue is that all takeoff calculations assume...

The issue is that all takeoff calculations assume a fully functional aircraft up to the point of failure (identification). So yes, failure AT the EF point is fine. But this wasn't a case of a failure...
Forum: Biz Jets, Ag Flying, GA etc.
11th Aug 2021, 18:19
Replies: 50
Views: 24,973
Posted By Mad (Flt) Scientist

To avoid giving me a heart attack each time I...

To avoid giving me a heart attack each time I open PPrune, could someone (OP or a mod) please add a DATE to the thread title?
Forum: Canada
10th Aug 2021, 15:19
Replies: 4
Views: 1,182
Posted By Mad (Flt) Scientist

I believe that would be "pedant" not "cynic",...

I believe that would be "pedant" not "cynic", says he pedantically ;)
Forum: Questions
31st Jul 2021, 23:20
Replies: 6
Views: 1,820
Posted By Mad (Flt) Scientist

(Taken from FAA MMEL PL-25) I'm going to...

(Taken from FAA MMEL PL-25)

I'm going to state that NEF's exist because common sense does not. And then duck. ;)

It shouldn't be necessary to state that a passengers foot rest isn't required...
Forum: Flight Testing
31st Jul 2021, 22:53
Replies: 2
Views: 550
Posted By Mad (Flt) Scientist

In the US, FAA Part 60 is your overall...

In the US, FAA Part 60 is your overall regulation. There are specifics in the Appendices. Appendix A is applicable to a FFS and the tables show which requirements apply to which of the device...
Forum: Biz Jets, Ag Flying, GA etc.
29th Jul 2021, 23:15
Replies: 50
Views: 24,973
Posted By Mad (Flt) Scientist

Also in that article: I don't know how...

Also in that article:


I don't know how people expect aircraft to get to and from airports without flying "low".... airport NIMBYism jumping straight in after a fatal accident ...[/color]
Forum: Tech Log
14th Dec 2020, 12:20
Replies: 7
Views: 1,219
Posted By Mad (Flt) Scientist

There are certification rules which address...

There are certification rules which address elements of this - for example 25.735(f) discusses "return to land" failure scenarios in the context of brake KE:

(Guidance material)


Since part 25...
Forum: Tech Log
14th Dec 2020, 12:12
Replies: 15
Views: 4,200
Posted By Mad (Flt) Scientist

Using the clock to monitor/mandate the...

Using the clock to monitor/mandate the periodicity of the check?

So if the check has to be done every ten days (say), skipping a bunch of days in the clock would make the system think you had...
Forum: Tech Log
30th Sep 2020, 03:18
Replies: 7
Views: 1,258
Posted By Mad (Flt) Scientist

Yes, if it's an option. They will be better...

Yes, if it's an option. They will be better placed to know what the "guts" of the device really contain, and what *could* be available, rather than perhaps having a more restricted list of what is...
Forum: Biz Jets, Ag Flying, GA etc.
23rd Sep 2020, 14:51
Replies: 8
Views: 2,456
Posted By Mad (Flt) Scientist

The heater on a CL-215 wasn't coal fired, but it...

The heater on a CL-215 wasn't coal fired, but it wasn't much more sophisticated either, I believe.
Forum: Tech Log
19th Sep 2020, 02:46
Replies: 7
Views: 1,258
Posted By Mad (Flt) Scientist

If you speak to the right people you can get...

If you speak to the right people you can get pretty much anything output from the sims, not just as plots but as actual data.That's what's used when a sim is used as an engineering test device for,...
Forum: Biz Jets, Ag Flying, GA etc.
2nd Sep 2020, 20:12
Replies: 8
Views: 2,650
Posted By Mad (Flt) Scientist

While I would agree that checking with CAE makes...

While I would agree that checking with CAE makes sense, the current situation in Canada/Quebec is pretty strict:Link to Canadian Govt page...
Forum: Biz Jets, Ag Flying, GA etc.
1st Sep 2020, 14:44
Replies: 11
Views: 3,317
Posted By Mad (Flt) Scientist

No-one deliberately builds windows that will...

No-one deliberately builds windows that will induce more drag. But there are practical limitations to how closely you can match adjacent surfaces when they are the same material, never mind having to...
Forum: Canada
5th Aug 2020, 23:16
Replies: 17
Views: 2,063
Posted By Mad (Flt) Scientist

Even if you don't go through Canadian Immigration...

Even if you don't go through Canadian Immigration or Customs - and there may be ways of doing that, but bear in mind the complexity introduced by the fact that US Immigration is in Canada at both...
Forum: Rumours & News
4th Aug 2020, 12:25
Replies: 1,128
Views: 475,323
Posted By Mad (Flt) Scientist

Concur, it comes down to the probability of you...

Concur, it comes down to the probability of you encountering the conditions the system is protecting against during the balance of the flight.

And note that if the flight indeed could not be...
Forum: Tech Log
17th Jul 2020, 14:54
Replies: 8
Views: 1,850
Posted By Mad (Flt) Scientist

TOGA Tap from a design perspective, if we didn't...

TOGA Tap from a design perspective, if we didn't bother to inhibit a message on takeoff that rather implies the design intent was that it should be available to crew as a decision-making aid. It does...
Forum: Military Aviation
13th Jul 2020, 12:00
Replies: 251
Views: 101,952
Posted By Mad (Flt) Scientist

Nowhere to store it? Is there an issue that you...

Nowhere to store it? Is there an issue that you can't just stick it back into a general storage tank without potentially contaminating that fuel somehow? Does seem odd, I agree.
Forum: Tech Log
8th Jul 2020, 00:05
Replies: 43
Views: 8,067
Posted By Mad (Flt) Scientist

Just out of curiousity, has there ever been an...

Just out of curiousity, has there ever been an incident (let alone accident) where a crew dawdling in raising the gear (but doing so eventually) has caused the problem? I can't offhand think of one....
Forum: Tech Log
23rd Jun 2020, 11:45
Replies: 43
Views: 8,067
Posted By Mad (Flt) Scientist

The IRS position, relative to the nominal centre...

The IRS position, relative to the nominal centre of gravity position, is known. The IRS can determine it's own movement, both in terms of translation and rotation. So it would be entirely possible to...
Forum: Rumours & News
19th Jun 2020, 20:26
Replies: 48
Views: 35,504
Posted By Mad (Flt) Scientist

Tell me I'm not the only one hearing the Benny...

Tell me I'm not the only one hearing the Benny Hill chase music when I watch that (somewhat sped up) video .

I guess I didn't know my speakers were off, because on re-viewing it actually does..:O
Forum: Tech Log
15th Jun 2020, 12:14
Replies: 9
Views: 2,099
Posted By Mad (Flt) Scientist

A horizontal stabilizer or tailplane does two...

A horizontal stabilizer or tailplane does two things, usually - it makes the aircraft aerodynamically stable in pitch for the desired range of centres of gravity, and it provides a means to create...
Forum: Rumours & News
1st Jun 2020, 15:02
Replies: 117
Views: 202,432
Posted By Mad (Flt) Scientist

I would hope not. A technique of marginal utility...

I would hope not. A technique of marginal utility if done right and of possible significant damage if done wrong would seem like a trap. "But my last 999 landings were so smooth" (or 9,999, or even...
Forum: Tech Log
1st Jun 2020, 13:46
Replies: 7
Views: 7,339
Posted By Mad (Flt) Scientist

As of today it's a "Mitsubishi" bug :) ...

As of today it's a "Mitsubishi" bug :)

Though it's actually a (Rockwell) Collins FMS issue - and following the links, the FAA actually appears to have issued their AD against the FMS, not against...
Forum: Tech Log
31st May 2020, 22:04
Replies: 20
Views: 5,786
Posted By Mad (Flt) Scientist

@Flight Detent. Could it be a case of a...

@Flight Detent.
Could it be a case of a simplified set of performance calcs (or charts more likely) which don't have provision for any "special" flex calcs?

So the option of your second sentence...
Forum: Rumours & News
25th May 2020, 20:26
Replies: 1,807
Views: 3,072,513
Posted By Mad (Flt) Scientist

With the best will in the world, the FCOM (or any...

With the best will in the world, the FCOM (or any other document, or group of documents even) cannot be a complete or perfect description of an aircraft's systems. There can be subtleties in any...
Forum: Rumours & News
25th May 2020, 17:52
Replies: 1,807
Views: 3,072,513
Posted By Mad (Flt) Scientist

I would be very cautious in concluding anything...

I would be very cautious in concluding anything about actual aircraft system behaviour, in an abnormal condition, from behaviour observed in a simulator whose intent is training not engineering...
Forum: Rumours & News
25th May 2020, 00:46
Replies: 4
Views: 3,964
Posted By Mad (Flt) Scientist

I don't believe the deal to sell the plant from...

I don't believe the deal to sell the plant from Bombardier to Spirit has formally "closed" yet; when announced (in Oct last year) it was stated the deal was "expected to close" in the first half of...
Showing results 1 to 35 of 1000
 
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