You are correct (again!)

Hirsch-M.Aé.R.C. H-100 research plane from France

Have sent you private message on the source of the photo’s. (nothing secret).
I think this forum is a perfect way of learning about lesser known aircraft which also deserve their place in aviation history (I think).
This twin appeared early-1950s and only single one was built.

Funny picture. Is this what we call Payload?
The heli is European from a country which you would possibly not expect. Not East European. It has a US made turbine engine

Magnum (Pick-up) of Terry O’Neill with the Ford V8 engine. Formerly known as the Model J with Jacobs (Page) R755-S radial engine

Dear Mondariz,
Many thanks for the link about the M-17. Beautiful pictures on a lesser known aircraft. I particularly liked the photo with the kids towing the aircraft. When I was a kid I always hated the fence/barrier between aircraft and me.
When its my turn, I will post a heli and think you will like it (and very probably also will know it)
Regards, Wout

John, sorry. One of my favorite subjets, one-off/experimental aircraft
This is also a one-off. Will accept two names/designations (designer or company that took over).

Dear Mondariz,
congratulations and thanks for the beautiful picture.
The Clark 1000 was developed by Clark Aircraft, Inc. of Marshall Texas and the first example flew 19 March 1956.
I know of following registrations: N9017R, N9018R, N9022R (the one in Mondariz’ photo), N78854. I also saw the Clark Model 1000 also described as the Clark Model 12 (Air Pictorial in the 1950s) and N78854 also as the Thompsopn Special. Production probably between 6 and 10 (assuming N9017R thru N9022R was a block used for the Clark 1000).
Have no idea why both Clark Model 1000 and 1000C designations were used. Maybe C for Continental?

Your turn for a juicy one!