Apologies if I was misleading – I was checking if this part was from an HP54 – but not any specific aircraft. Just my digging about into HP54’s found the video which I found interesting.

The part was acquired last year at Shoreham. So could be from anything.

Thanks to all.

I do not think it is a drop tank fin – as the ones I have (Tornado 1500l) are made from honeycomb.

This one appears to be made from two section of aluminium alloy – riveted together and then machined/milled to the desired shape.

I do not think the upper and lower lugs are to be used on the final fin- they are to allow bolting of the fin to the milling machine base – before machining.
They would then be removed before use.

It also cannot be an antenna as it is solid.

Still not sure that the small fin is from any of the AIM-9’s. It certainly looks like a swivelling canard type but from an unknown type.

Thanks for all ideas so far.

Thanks to both of you.

I have some sidewinder fins and they are similar design but different to the small one.