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dakkg651
9th Jan 2008, 14:08
I have recently been given a model of a PKZ-2 Austro-Hungarian observation helicopter.

According to the qaintly translated history that came with the kit, it was built to replace observation balloons as it would be more reliable and dangerous! The last bit I think was badly translated although looking at the model probably accurate.

It was powered initially by three 100hp Gnome rotaries but by April 1918 these had been replaced by more powerful Le Rhones turning two contra rotating rotor blades. The observer sat in a sort of crows nest positioned above the rotors and was optimistically provided with a parachute. Three winches attached to tethers controlled the ascent and descent.

Apparently it was flown manned and unmanned a number of times but was cancelled in June 1918 because of stablility problems.

PKZ was the initials of its designer(s) Petrochy Karman Zurovec.

Any relation to Karman of later co-axial rotor fame I wonder?

Anyone know any more details?

Kitbag
9th Jan 2008, 14:12
Google is your friend. Also find reviews of your model.

Kb

dash7fan
9th Jan 2008, 16:55
http://member.file-upload.net/seneca/PKZ2.jpg
It flew 1918 at Fischamend (6km east of the actual Vienna Airport) up to 50 meters for 30 minutes, but tied down with 3 ropes.

evansb
9th Jan 2008, 17:23
Kaman (not Karman) Helicopters was founded by Charles Kaman in 1945.

Kitbag
9th Jan 2008, 19:10
I know this is a model, but just to emphasise the precarious nature of the pilots position (some may say suicidal):
http://www.rodenplant.com/IMG/008/0083d.jpg

On second thoughts didn't Focke Wulf have a similar configuration for the Triebflugel?

S'land
9th Jan 2008, 22:45
Kitbag.

Similar, but streamlined. Attached link shows an animation of the FW Triebflugel.


http://www.youtube.com/watch?v=bqqQ48KFXJE

Load Toad
10th Jan 2008, 04:15
On one of the web sites it notes the observer was provided with a parachute. Hhmm? Option - plummet to earth with the helicopter - or dive into the still spinning blades. Nice.