More scrap metal

I've got a box full of scrap metal collected over the years at Hampstead Norris. It's probably about time I had a go at getting it identified, so here goes. Any suggestions welcome.

Firstly a pair of aluminium castings, machined to 4.75 in diameter. Various numbers stamped on one: AHZ60, LH401 in a circle and AIR 20842. I've always assumed that they were off aircraft being aluminium, but....






Sticking with lightweight metal there is this light alloy/aluminium spar, about 2.125 in wide and 0.625in thick with a diamond shaped clevis riveted into both ends, and exactly 12 in between the holes drilled into the clevis':



Then some rusty housings which in at least one case is electrical, with the remains of a fine copper coil, but I think that they are all probably related:




Finally having started with aluminium, I'll finish with lead. I can't imagine what this was off, but the lead item in first picture is about 4in x 2 in x 1.5in, parallelogram in section and was bolted onto steel at both ends. The second picture has a piece of lead on the right and on the left is a 4 in diameter backplate for a rotary switch, labelled ATO B, ATO C and ALL OFF at three points of the compass.

Image 5 - If it is an aircraft part then, being lead, it might be a ballast weight. These were supplied in separate blocks to permit adjustment to an aircraft C of G (Centre of Gravity) I considered that it might be a counterbalance for a flying control surface, mass or aerodynamic, but it's the wrong shape and the steel attachments are wrong.

First pic reminds me of the base of a landing gear leg

It might be worth posting this on Key Forums as there are lots of similar questions there and very litlle if anything goes unidentified . Worth a look ;
forum.keypublishing.com/showthread.php?137903-Beach-find

Pics 1 and 2 are clearly clamp halves for a shaft or tube such as a control surface or flap hinge . They may have gripped a plain bearing or a ball or roller bearing?

Pics 4 and 5 using the copper wire coil as a clue might be parts of a transmitter for a flap position indicator (Dessyn?) But might also be agricultural or automotive!

David - thanks for the tip about that forum, I will have a look.

I favour the landing gear theory for the ally clamp halves - that was my initial reaction years ago when I was given the pristine one and then found the second. I was a bit blinkered by the Wellington link with the airfield, and had come to the conclusion that it wasn't off one of them (I am going back to Brooklands in March to have a look at the one there, to be certain).

My feeling is that it maybe off an Albemarle undercarriage, as at least a couple of dozen were scrapped at HN in 1946. In fact last night whilst looking at the 4th Nov 1946 aerial of the airfield, and comparing it with the 12th April 1946, I realised that what looks at first sight like a lot of scrubby bushes in the grass in front of the apron at the W end of the T2 hangar, is in fact a large collection of scrap fuselage and wings. The November aerial was taken late afternoon on a bright, sunny day so although of good quality the very long shadows obscure some detail.

From memory I thin kthe wellington and Halifax has the same type of wheel attach bracket. The Lanc has one single bolt running through the leg