BAC 1-11 problem

[DispatchDragon]

Garry R

Overspeed is a bell.....or at least it was

Ive meant to drop DM a note about that - may have been a bell on BA aircraft
but on Dan Airs 1-11s its was a clacking sound which was disabled by pulling 2 CBs behind the Captain 34 and 35 I believe. - They all sounded exactly same .


Leif

[Garry Russell]

Hi Leif

Just to clarify

My reference was to what the overspeed has, been as far as I know, always been and still is, a bell on the DM One-Eleven.

I have no idea what it is in real life. Individual operators may well have their own thing.

It's more than likely Dan Air was different to BA as the BA was a different set up altogether.

Certainly wouldn't surprise me :think:

Garry

[DispatchDragon]

Sokay Garry

I was curious as Dans 1-11s were a hodge podge bunch but that was
one thing they had in common - It sticks in my mind as it was common
practice ( :shock: ) to pull the overspeed breakers by DA crews and cruise
around at .76-77 and as I said it was a very distinctive clacking, and the
current bell on DMs 1-11 is closer to the sound of the fire warning on Dans aircraft - (Even in the 70s there was an attempt to assign different sounds to different functions, the altitude alerter on Dans 1-11s was a tone similar to that found on Boeing models, and so on)


Leif

[me4246]

Thanks a lot for you advices. Yes, it was cabin pressure that horn, and it seems sufficient to set a cabin pressure upper than 2000' to have a quiet trip...
Incidentally I went overspeed (what a great pilot!) and heard the nice bell sound...nothing to do with those Boeing horns!

Francesco

[Garry Russell]

Hi Francesco

Glad you're sorted

The newer panels from DM and Vraser mean you have to do it by the book ....or else

Garry

[MALTBY D]

Thanks everyone for advising on this in my absence.

The overspeed bell sound was recorded from AZMF (but don't tell anyone ), so it wasn't a BA only thing.
And as Basil Fawlty quite rightly stated - "It doesn't sound anything like the fire bell, it's a semi-tone higher!"

DM

[Garry Russell]

Unless of course 'ZMF was modified when it was with BA :think:

But maybe not

Garry

[DaveB]

Hi Garry,

ZMF's panel is exactly as it was prior to DM's update.. basically, a more up-to-date version of the 'non-BA' panel. What this boils down to is a GPS unit on the pedestal and a TCAS V/S gauge in place of the 'mechanical' one now in place on both DM panels

She was never an 'off the production line' BEA/BA aircraft mate and had been in service for 16years before finally becoming a 'merged' BA airframe so I doubt she was ever fitted with the 'Trident like' panels as fitted to the 510ED's

ATB

DaveB :tab:

[Garry Russell]

Hi Dave

I know she was a BCAL and the panel was used in FS

I wasn't suggesting she had a BA panel :shock: ...just perhaps a BA warning sound added. :k:

It was suggested tha BA may have had a bell and non BA another sound but the theory was negated because ZMF had the bell.

So I was just pointing out that ZMF had been with BA (4 years) so it can't be assumed that that was the original warning although it probably was.

As you say the 510 and possibly the 539 series had the BA panel

Garry

[DaveB]

No.. I know This anomaly is one of the reasons One-Eleven pilots couldn't nip between types without first being type-rated I suppose bits might have migrated from one aircraft type to another but something as significant as an alarm would have necessitated a change in the flight manual and wouldn't have been feasable for one airframe otherwise the type-rating would be null and void.

Interesting subject all the same

ATB

DaveB :tab: