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Search: Posts Made By: 737Jock
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Forum: Tech Log
16th Apr 2014, 09:54
Replies: 99
Views: 17,748
Posted By 737Jock

Nor would you put it far below, as it would...

Nor would you put it far below, as it would create an unnecessarily large tailfin.

After all V2 is also a minimum of 1.2Vs or 1.13VS1g. (Vs= 0.94 x Vs1g)

If you would aim for VMCA=Vsx1.09 V2min...
Forum: Tech Log
16th Apr 2014, 09:21
Replies: 99
Views: 17,748
Posted By 737Jock

Fin is for stability. Rudder is to...

Fin is for stability.

Rudder is to compensate for crosswind, engine power etc. It controls the longitudinal axis around the vertical axis.

Your point? Its the same reason why multi-engined...
Forum: Tech Log
16th Apr 2014, 08:57
Replies: 99
Views: 17,748
Posted By 737Jock

Ever flew on a jet that needs more rudder input...

Ever flew on a jet that needs more rudder input during a crosswind landing then in an engine failure at V1 at TOGA ?
No thought not....

I completely understand the theory, the practicality is a...
Forum: Tech Log
16th Apr 2014, 08:08
Replies: 99
Views: 17,748
Posted By 737Jock

So please explain me then why a manufacturer...

So please explain me then why a manufacturer would put on a fin that is so big that VMCA is below Vs?
Clearly indicating that they can save weight, materials and thus reduce fuel burn.
Forum: Tech Log
15th Apr 2014, 11:58
Replies: 99
Views: 17,748
Posted By 737Jock

maybe if you consider that vmcA is only valid in...

maybe if you consider that vmcA is only valid in the take-off configuration you would understand my post.

vmc is a term that is way too generic, every phase and configuration has its own vmc. For...
Forum: Tech Log
15th Apr 2014, 11:16
Replies: 99
Views: 17,748
Posted By 737Jock

http://www.avioconsult.com/downloads/Controlling%2...

http://www.avioconsult.com/downloads/Controlling%20multi-engine%20airplanes%20after%20engine%20failure.pdf





Sorry but I cannot find any evidence at all that VMCA would massively be below Vs...
Forum: Tech Log
15th Apr 2014, 11:03
Replies: 99
Views: 17,748
Posted By 737Jock

what you quoted are irrelevant numbers that do...

what you quoted are irrelevant numbers that do not correlate in aircraft configuration, the only correlation is that they come from the same manual. But the qouted stallspeed is in clean...
Forum: Tech Log
14th Apr 2014, 08:38
Replies: 99
Views: 17,748
Posted By 737Jock

whats foreflight?

whats foreflight?
Forum: Tech Log
14th Apr 2014, 07:41
Replies: 99
Views: 17,748
Posted By 737Jock

It's because like cyclists they change the lead....

It's because like cyclists they change the lead. But instead of dropping back straight to the back, they dropout to the side (creating the v-formation) and then crossover to the other side. Which...
Forum: Tech Log
14th Apr 2014, 06:46
Replies: 99
Views: 17,748
Posted By 737Jock

If I may disagree, first and foremost it's good...

If I may disagree, first and foremost it's good to know at what airspeed the aircraft can safely get airborne and control it's direction. If you can't do that then there is not much point in having a...
Forum: Tech Log
13th Apr 2014, 16:08
Replies: 99
Views: 17,748
Posted By 737Jock

Just been looking through minibus fcom. ...

Just been looking through minibus fcom.

Stallspeed vs1g for A319 at 60T 1+F is about 112kts at 0 pressure altitude
The minimum V2 speed for take-off limited by VMU/VMCA is 128kts.
Minimum VR is...
Forum: Tech Log
13th Apr 2014, 15:34
Replies: 99
Views: 17,748
Posted By 737Jock

As you see from the requirements vmca is...

As you see from the requirements vmca is determined at the maximum sea-level take-off weight.

What do you mean with: he is comparing the stallspeed at that weight to the minimum control speed...
Forum: Tech Log
13th Apr 2014, 08:17
Replies: 99
Views: 17,748
Posted By 737Jock

Regarding VMCL: (which is really just another...

Regarding VMCL: (which is really just another form of VMCA but in a differrent phase of flight)
Forum: Tech Log
13th Apr 2014, 07:45
Replies: 99
Views: 17,748
Posted By 737Jock

I refer you to post 42 lord spandex smasher. Or...

I refer you to post 42 lord spandex smasher. Or indeed the following:
http://www.skybrary.aero/bookshelf/books/2263.pdf



If you call stalling flying then I think we have to agree to disagree,...
Forum: Tech Log
11th Apr 2014, 11:56
Replies: 99
Views: 17,748
Posted By 737Jock

So you take-off in clean configuration...

So you take-off in clean configuration mustafagander?
Maybe you rotate at 205 kts and blow your tires that are most likely rated to 195kts?

Even if you could theoretically derive that VMCA is...
Forum: Tech Log
9th Apr 2014, 08:59
Replies: 99
Views: 17,748
Posted By 737Jock

vmca, with a for air, is below vs? please explain...

vmca, with a for air, is below vs? please explain

as far as I know vmca is the speed at which the aircraft can be controlled with the most critical engine failed and a maximum bank of 5 degrees...
Forum: Tech Log
6th Apr 2014, 19:46
Replies: 99
Views: 17,748
Posted By 737Jock

It slows down slower, I wouldn't say the...

It slows down slower, I wouldn't say the differences are dramatic for a a320 Sharklet.
It's a nice excuse though for an approach that would have been pretty much as bad in a non-sharklet a320.
yes...
Forum: Tech Log
5th Apr 2014, 17:18
Replies: 99
Views: 17,748
Posted By 737Jock

As for 737-800 without winglets: Photos:...

As for 737-800 without winglets:

Photos: Boeing 737-8Q8 Aircraft Pictures | Airliners.net (http://www.airliners.net/photo/Britannia-Airways-(Sterling/Boeing-737-8Q8/0015774/L/)

OMG:eek:
Forum: Tech Log
5th Apr 2014, 17:08
Replies: 99
Views: 17,748
Posted By 737Jock

Vref is derived from the stallspeed. Just google...

Vref is derived from the stallspeed. Just google on the effect that winglets have on stallspeed and you will find your answer.

Sorry don't feel like writing a thesis on winglets, amongst the just...
Showing results 1 to 19 of 19


 
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