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BAE146 questions

jgarnold

jgarnold

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australia
I have recently become interested in the BAE146 aircraft and was watching a Youtube video of a real BAE146 and noticed two things which I can't work out and hoping someone knows the answer
I have attached a screen shot and these are the questions.
1) What are those 'pods' (one each side) at the rear of the fuselage. The aircraft is an RAF aircraft and maybe these only are on the military versions.
2) How come the elevators appears to work independent of each other (in the screen shot the left one is up and the right one down). As the aircraft turned onto the runway the right one raised in alignment with the one on the left and then during engine runup just before it started to move the left one dropped to the level position. The aircraft then started to move forward while the right one was still raised and then it also dropped to the level position.
bae146.jpg


If you want to have a look go to
 
Hey John,

I think the rear pods are exhaust stacks for the onboard APU(s).
As for the elevators, that 'might' be a cool feature that enables the elevators to work 'with' the ailerons. It could also be he was firing up the hydraulics. Maybe the system was coming online, etc. Some planes, when they sit, the control surfaces that are on hydraulics will droop. When you powerup and kick in the hydraulics systems, then the control surfaces go active. Some fighter jets like the F35 and F24 have elevators that work with the ailerons.

Is this possibly a prototype that is testing out new systems? That exhaust in the back is 'very odd'. Also, it has a Cam in the belly. CIA? It has British registry, but the camera device and the odd stacks in the back are not right. You can tell they are stacks because you can see the heated exhaust in the air on the photo.
 
That's an RAF machine used for VIP flights. Those pods at the back are part of an ECM fitment.
 
Hi Lionheart

Your suggestions seem sound although as the aircraft had been taxiing for a while surely the hydraulics would have been fully operational by the time the aircraft got to the end of the runway. When I just Googled ZE700 (the registration number) I got https://www.planespotters.net/airframe/British-Aerospace/BAe-146/E1021/ZE700-Royal-Air-Force
which states that it is 32 years old and there are lots of photos of it. After 'drilling down' through links I found the following data
Ailerons and elevators are controlled through conventional wire-linked servo tabs with backup hydraulic systems
Modern, electronic defensive-aids suite gives almost 360º protection against infrared missiles - maybe that's what those pods are.

Doesn't explain what the differential elevators are though.

Hopefully someone will read this who knows more about the BAE146-100


Aha DaveWG (reply came in as I typed my response) says what the pods are. Thanks.
Now I just need to find out about those strange elevators.
 
yes, it's something I would not have guessed. thanks for bringing this observation here. they are things that we
don't pay much attention
 
Elevators are independently connected via cables (no Hydraulics). They're controlled by small servo tabs on the trailing edge of the Elevators themselves (you can see them in the picture). The flight controls directly move the servo tabs which in turn move the elevators aerodynamically. So in the wind, with the controls locks removed, they will move around like that.
 
How strange. Hey I found that the Quality Wings RJ series (basically the same as the BAE146) do the same thing as the real ones. How's that for realism?
 
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