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Boeing 737 / Auto deployment ARM and down detent
« Last post by Driver170 on July 21, 2020, 04:25:20 AM »
Why have ARM position when auto deployment of spoilers happen when the speed brake is down detent? So why have ARM position...
Boeing 737 / Aural Warnings through headsets
« Last post by Driver170 on July 02, 2020, 07:37:43 PM »

I’m wondering if anyone knows on Ryanair Fleet they have GPWS, Aural warning callouts etc through the headsets or are these sounds all through the Aural warning box down near the FO side at the TQ?
ATPL / Washout
« Last post by Driver170 on July 01, 2020, 11:43:07 AM »
Camber change! Why would you want to reduce lift at the wing tips? This would increase tip stall and something that’s undesirable.
ATPL / Practice your IFR skills
« Last post by Sacha on June 30, 2020, 07:48:33 AM »
Dear all,

Here is a very nice tool to practice your IFR skills with an online simulator and a 140 pages PDF to refresh your knowledge.
Get your manual at their FB page:


ATPL / High and low speed buffet
« Last post by Driver170 on June 28, 2020, 12:19:02 PM »
Hi, i have general idea in what is going on but i can’t figure out why the Mmin increases for the low speed stall and Mmax decreases for increasing altitude
Boeing 737 / Two questions about sound & bleed
« Last post by JWS on June 27, 2020, 06:46:20 PM »
For my first post here I have two questions. One regarding the sounds that can be heard (or not) on the flightdeck. One about take off without bleed.

1. Sounds

There is always discussion amongst cockpit builders about the sounds to be heard on the flightdeck when using add-on sounds. Let me explain.

The immersion is greatly enhanced if the cockpit environment not only gives you visual clues but also audible ones. Therefor there are often sound packages that are stand alone or come as a part of an aircraft model. Not only the roar or whine of the engines, but all kind of sounds of systems that add to the symphony that the crew enjoys each flight. One can even feel the vibrations through so called transducers (Buttkickers of Bass shakers). I have one under my IPECO seat, great fun to have. ;D

All very nice but what sounds do pilots actually hear up front? That's where the debate starts.
On the flightdeck you can hear e.g. the packs, the avionics, the gyro's, the GPWS, the wind, the rumble of the runway, the bumps of the runway lights and the landing gear going up or down, the front door closing and perhaps the cargo bay doors. This is obvious. But …

- Some builders have the sound of the APU running, others claim you can't hear the APU in the cockpit, because it's in the tail of the aircraft (so too far away).

- Then the flaps. In flightsim always a prominent sound, but is that correct on a big airliner? Yes if you are a passenger sitting next to the wing, you can hear the mechanism of the flaps or the slats. But in the cockpit? And can you hear the turbulence that the flaps cause?

- How about the fuel pumps? Can you hear them?

- Recirculating fans?

- And the engines? To what extend can you hear them? Can you hear them spool up when you start them or is that more of a vibration felt in the fuselage?

- It is said that the higher you fly the less you hear (thin air). So the noise of the wind on the windows will become less, but also the engine noise? Or can't you hear engines during cruise anyway?

- What can be heard with all that noise in the cockpit of what is happening in the cabin? Can you hear pax talk, children cry (some sound packages have these sounds), etc.?

I hope to 'hear' a leaned opinion on this subject.

2. Take off without bleeds

When watching the B737CL CBT video's I came across the one that deals with bleeds settings in case of a (taxi out &) take off without bleeds.
That made me wonder when does one take off without bleed? I usually have them on.
And I switch off the APU after engine start before commencing to taxi. But is that the correct procedure?

Kind regards & stay safe,

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