DC8

There's an ultralight of some description sitting next to the highway just outside Holbrook, NSW.
And after Rex retired one of their Saabs a couple of years ago (VH-OLN I think), after christmas-treeing it for all the working parts they put it onto a pole at the pilot academy in Wagga.

A Hurricane and Spitfire which greet you at RAF Museum Hendon (UK).
They're fibreglass.

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The first Aussie Canberra was on the gate as RAAF Amberley but I'm not sure if it has been moved into the new Museum.

Many years ago a boomerang (yes a boomerang) was on the gate of RAAF Williamtown. It has since been relocated to the RAAF Museum. All the other aircraft on the gate are now displayed within Fighterworld.

There's a military dc3 in the carpark of the Mulwala services club

Its definitely not on a pole,its used for ground school.

United DC-8-52

There is a Vampire (A79-321) on a pole at a shopping complex here in the Melbourne suburb of Braybrook, on the sight an old Defence force storage facility. When the facility was running back in the 80's / early 90's a Sabre Jet was on a pole not far from where the Vampire is today.

Pic & some info here : http://www.waymarking.com/waymarks/W...reet_Braybrook

http://sinsheim.technik-museum.de has many planes on a pole

Karl the Sabre was A94-907 which I saw in July 1992 whilst visiting Freedom Furniture stores in Melbourne, I have the location as Footscray as that's what a nearby sign had on it.

There was also a Meteor on a pole at a former defence facilty in Villawood, serial A77-878. The site was cleared many years later and is now a Bunnings complex.