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Forum: Tech Log
4th May 2014, 17:45
Replies: 36
Views: 16,472
Posted By HazelNuts39

OK465, The stall speed ratio applies to the...

OK465,

The stall speed ratio applies to the configuration used for compliance with the approach climb minimum gradient requirement. The AFM or equivalent should state the approach climb flap...
Forum: Tech Log
4th May 2014, 15:19
Replies: 36
Views: 16,472
Posted By HazelNuts39

Hi OK465, The point I was trying to make is...

Hi OK465,

The point I was trying to make is that the landing configuration and the approach climb configuration are a 'pair' linked by the stall speeds. But you are correct, there is indeed a...
Forum: Tech Log
4th May 2014, 09:11
Replies: 36
Views: 16,472
Posted By HazelNuts39

Still confused?

Just to clarify in case there is still some confusion:

(1) When dispatching a two-engined transport airplane for a flight with the landing gear locked down -

The takeoff weight may not exceed...
Forum: Tech Log
3rd May 2014, 09:20
Replies: 36
Views: 16,472
Posted By HazelNuts39

8che, I don't know how Boeing presents this...

8che,

I don't know how Boeing presents this information and the OP has not identified his source.

The Airplane Flight Manual (AFM) is the final authority on performance operating limitations...
Forum: Tech Log
2nd May 2014, 21:15
Replies: 36
Views: 16,472
Posted By HazelNuts39

See FAR 25.121(a) Takeoff, landing gear extended

See FAR 25.121(a) Takeoff, landing gear extended
Forum: Tech Log
2nd May 2014, 20:16
Replies: 5
Views: 2,950
Posted By HazelNuts39

Special Civil Air Regulation no. SR-422 of 1957...

Special Civil Air Regulation no. SR-422 of 1957 was preceded by the Final Report of ICAO's Standing Committee on Airplane Performance of 1953. The US authorities participated in the SCOP and adopted...
Forum: Tech Log
2nd May 2014, 19:42
Replies: 36
Views: 16,472
Posted By HazelNuts39

I'm suggesting that the term "Landing Climb Limit...

I'm suggesting that the term "Landing Climb Limit Weight" is a misnomer. The correct term would be "Maximum Landing Weight Limited by Climb Requirements", or in short "climb-limited landing weight"....
Forum: Tech Log
2nd May 2014, 12:07
Replies: 36
Views: 16,472
Posted By HazelNuts39

Doesn't my post #4 above answer that question?

Doesn't my post #4 above answer that question?
Forum: Tech Log
2nd May 2014, 11:18
Replies: 36
Views: 16,472
Posted By HazelNuts39

That is the landing climb gradient requirement...

That is the landing climb gradient requirement for dispatch. I was asking you to explain the equivalent requirement for 'in-flight' which you claimed to be different.

P.S.
Since the 'landing...
Forum: Tech Log
2nd May 2014, 09:44
Replies: 36
Views: 16,472
Posted By HazelNuts39

8che, I'm fully aware that I didn't answer...

8che,

I'm fully aware that I didn't answer the OP's question, thank you. I thought by providing related information he might discover that he didn't ask the right question.

Since you are so...
Forum: Tech Log
2nd May 2014, 08:49
Replies: 36
Views: 16,472
Posted By HazelNuts39

Maybe this helps - From Boeing Jet Transport...

Maybe this helps -

From Boeing Jet Transport Performance Methods:
. For twin-engined airplanes the approach climb requirement is usually more limiting than the landing climb requirement. There is...
Forum: Tech Log
29th Apr 2014, 19:07
Replies: 2
Views: 3,894
Posted By HazelNuts39

buzz, it is mostly correct, except where you...

buzz,

it is mostly correct, except where you write " t vsr0 is the fastest speed attained during testing at which a part of the wing starts to stall, corrected to 1g". Vsr0 is actually the slowest...
Forum: Tech Log
22nd Apr 2014, 14:27
Replies: 813
Views: 99,361
Posted By HazelNuts39

Indeed ...

Indeed ...
Forum: Tech Log
21st Apr 2014, 14:40
Replies: 813
Views: 99,361
Posted By HazelNuts39

So how would you demonstrate it in normal law in...

So how would you demonstrate it in normal law in a certification flight test?

P.S.

The diagram you posted is a schematic illustration that alpha-max is just shy of alpha-CLmax. Alpha-CLmax...
Forum: Tech Log
21st Apr 2014, 06:48
Replies: 813
Views: 99,361
Posted By HazelNuts39

How does that differ from the definition of Vs1g?...

How does that differ from the definition of Vs1g?

P.S.

The special conditions for certification of the A320 (and associated guidance material) define Vs1g as the minimum speed (corrected to 1g...
Forum: Tech Log
17th Apr 2014, 18:44
Replies: 813
Views: 99,361
Posted By HazelNuts39

5. None of them But you are constantly...

5. None of them

But you are constantly changing the subject. The issue was Valphamax, where you disagreed with me, and you have not answered my question: How would you define Valphamax?

P.S.
...
Forum: Tech Log
16th Apr 2014, 13:55
Replies: 813
Views: 99,361
Posted By HazelNuts39

Short summary of the captains briefing of the...

Short summary of the captains briefing of the copilot: I'll take her to alphamax and then you control thrust to maintain zero vertical speed ...
Forum: Tech Log
16th Apr 2014, 09:49
Replies: 99
Views: 11,925
Posted By HazelNuts39

My graph is generic and schematic, to assist in...

My graph is generic and schematic, to assist in understanding what I'm writing. Of course you may put the blue line anywhere you like, but you would create a very unusual airplane if you put it at...
Forum: Tech Log
16th Apr 2014, 09:19
Replies: 99
Views: 11,925
Posted By HazelNuts39

737Jock, Please explain me why single-engine...

737Jock,

Please explain me why single-engine airplanes have a fin and rudder.
Forum: Tech Log
16th Apr 2014, 08:37
Replies: 99
Views: 11,925
Posted By HazelNuts39

Just to illustrate a point I made earlier: ...

Just to illustrate a point I made earlier:

http://i.imgur.com/bgKI4J1.jpg

Vmc is normally determined by flight test at minimum weight. At 5 degrees of bank Vmc reduces with increasing weight....
Forum: Tech Log
15th Apr 2014, 08:45
Replies: 813
Views: 99,361
Posted By HazelNuts39

It seems reasonable to me that the BEA saw no...

It seems reasonable to me that the BEA saw no need to communicate them because neither pilot made any reference to those speeds, not in the briefing nor in the execution of the demonstration. That in...
Forum: Tech Log
14th Apr 2014, 10:06
Replies: 813
Views: 99,361
Posted By HazelNuts39

Compared to the certification requirement, that...

Compared to the certification requirement, that is a lame argument. Vs1g is the official definition of "stalling speed" for this airplane, and it is obtained with the sidestick on the aft stop at the...
Forum: Tech Log
13th Apr 2014, 18:44
Replies: 99
Views: 11,925
Posted By HazelNuts39

You are misreading the requirements. Even though...

You are misreading the requirements. Even though Vmca varies little with weight, it is usually determined at all weights where it may be limiting V2, which is usually at the low end of the take-off...
Forum: Tech Log
13th Apr 2014, 14:09
Replies: 99
Views: 11,925
Posted By HazelNuts39

Minimum control speed and stall speed

Whereas the stall speed varies approximately as the square root of weight, the change of minimum control speed with weight is very small. The reason that it changes at all is the bank angle of 5...
Forum: Tech Log
13th Apr 2014, 08:38
Replies: 813
Views: 99,361
Posted By HazelNuts39

Firstly, speed and attitude are independent...

Firstly, speed and attitude are independent variables. You can have any speed at any attitude.

Secondly, one of many explanations is that Asseline flew into a forest and Bechet did not. Asseline's...
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