Pat, we would call the appliance on the left a Hydraulic Platform (HP)- a good fire-fighting/rescue platform widely used by Brit fire brigades for the past 50 years or so. The only real downside to one of these is its general lack of manoeuvrability: the two 'knuckles' tend to limit the booms' operational movement. And secondly, the booms themselves tend to be long and overhang the front and the rear of the chassis, giving the vehicle itself problems manouevring - particularly when surrounded by street lamps and telegraph poles.
The appliance on the right is a relative newcomer to the UK fire scene, and what we call an ALP: an Aerial Ladder Platform. It combines an HP with the regular Turntable Ladder. Most ALPs are Brontos, a Finnish company, and are made by Angloco.
Its two main advantages over the HP are its increased manouvrability. The booms can even operate below ground level to perform a water or bridge rescue, for instance.
Plus, its compactness makes the vehicle easy to manouvre and to set-up; and the telescopic arrangement of the booms mean it can carry booms that far excede the maximum operational height of those of an HP or TL. Most UK HPs are SS263 - 26.3 metres or 86 feet. The largest in the UK are 30 metres, or 98 feet. UK TLs too have a maximum working height of 30m/98 feet. Bronto Skylift can build you an appliance with a maximum height of 104 metres, that's a truly terrifying 341 feet!!! But in the UK, the highest our ALPs reach is a far more sensible 32 metres, that's 104 feet. I'm pretty sure they're the largest we have.
Very few UK brigades still operate all three types of aerials (London Fire Brigade quickly springs to mind). Lots of brigades still operate at least two types though, usually HP and ALP as TLs seem to be fading in popularity and very few brigades are buying them these days.
The main reason why HPs are still very much a fixture among UK brigades is their reliability - the booms seem to last for ever! Most brigades will re-chassis the booms because it is a lot cheaper than buying a brand-new complete unit. I think today there are some HPs in active service that are riding on top of their third chassis.
So personally I don't think brigades buy aerial appliances to suit the particular needs of a certain part of the county. I think each brigade will make the aerial work for them, irrespective of what type it is. As is always the case in Britain, Pat, it comes down to money . . .
Lothian and Borders FRS operate 1 HP with rechassised booms, and 3 TL`s, 1 of which they bought new as an S reg and the current 2 others are of 1987 and 1989 vintage, - both bought second hand and regularly used operationally. They have had previoussecond hand TL`s of 1984 and 1986 vintage that both served them well until replaced. L&B bough a brand new M reg Simon ALP that was frequently off the run and was involved in a roll over accident whilst en route to a call and eventually it was replaced by a second hand TL. Given the age, and cheap cost of the TL`s L&B have bought, as well as their reliability I can`t see them ever going down the ALP road again.
The left-hand rig appears to be an articulating boom "Magirus Simon"; and the right-hand rig is apparently a telescoping boom.
Has anyone more details; and which design works out better for West Yorks fire coverage area ?
Regards, from Canada,
Pat_R-B
Added by Pat Rivers-Bowerman on 18 February 2010.