During WW2 were any allied planes shot down by ex-allied planes being flown by the Luftwaffe?
https://www.warhistoryonline.com/war-articles/the-axis-lancaster-stunning-pictures-of-allied-planes-captured-and-used-by-the-luftwaffe.html

Not strictly Luftwaffe, but the Italian air force used a captured P-38 in August 1943 to shoot down a B-17 off Anzio.

Basic aircraft woodwork techniques and tooling are very well brought in ‘Werkstattpraxis für den Bau von Gleit- und Segelflugzeugen’ by Hans Jacobs, pre-war and hard to find, but there’s some scans floating around on the web. Judging from the condition of the pod the repairs will be for static display only anyway…

The Mitsubishi is indeed an Indonesian air force example. This would date it to 1945-1949 somewhere. Could be a home-made conversion of Ki21 into passenger transport, they are known to have been flying with the Indonesian AF in their struggle with Dutch forces in the (then) Dutch East Indies. There is an intelligence report which places a single unservicable Ki21 with the Indonesian AF at Surabaya in 1946, not much else is known of them.

The DC-3 in the Mosquito-picture should be malayan VR-SCO, delivered August 1947. The Lancastrian was deregistered December 1949, so that will give you a timeframe of the picture.

DC-3 VR-SCN was delivered August 1947,

Car’s a Renault 12, if that’s any help. So France or Romania are likely locations.

Not a Renault 12 I think (having driven them to a great extent much to my annoyance). Opel Ascona or the like I would say?

I imagine this one? https://en.wikipedia.org/wiki/1990_British_Army_Gazelle_shootdown

Irish Linen, Madapolam, and Egyptian Cotton were the three favourites for RAF aircraft.

A far cry from today’s Ceconite and Oratex, all artificial fibres.

http://www.ebay.com/itm/SIKORSKY-S-55B-HELICOPTER-WITH-ROUND-MOTOR-NO-RESERVE-/191595564091?forcerrptr=true&hash=item2c9bfc4c3b&item=191595564091