Warbird Information Exchange

Hi all,

for those interested here are some pics shot at the museum of Kbely, in Prague, Czech Republic (the inventors of Budweiser

http://home.tiscali.nl/mentink/aerovetpics/KbelyIl2.jpg

http://home.tiscali.nl/mentink/aerovetp ... eroC3A.jpg

This is actually a Nord NC701 Martinet, but painted as an AeroC-3, both are licence built Siebel 204's (are you still with me??)

http://home.tiscali.nl/mentink/aerovetp ... lyS199.jpg

(locally built two seat Bf-109)

http://home.tiscali.nl/mentink/aerovetp ... via262.jpg

(-do- Me 262.....!)

http://home.tiscali.nl/mentink/aerovetp ... iaB534.jpg

The only Avia B534 fighter existant in the world!

Greetz,
Gert Jan (AKA Aerovet)

That is a very nice museum. I was there in 2005 and both the diaramas and the "aircraft storage" hangars are really nice. We were the in November, so we were the only ones at the facility. At the time there was a large collection of Migs of different models at anearby hangar. The museum itself has a collection of cold war jets outside between the two hangar facilities. I will look for some of my photos and post them if anyone is interested.

Looks like the ME-109 has a FW-190 prop on it.

_________________
Live to fly, Fly to live.....

OK. gotta ask. Some one tell me about the fins on the Aero c3 spinners. Airflow dynamics to reduce the drag of the engine and nacelle??

_________________
Greg Schneider
E Fighter Productions
"There is a big difference if you are in actual war or if you are playing war." Hartmann, Jagdgeschwader 52

Tell me that lighting on the Avia is from a skylight and it's not sitting outside.

Mudge the shocked

_________________
Land of the free because of the brave

That is a diarama that is in one of the hangars. It is not sitting outside

I think that the props on the Aero are Avia constant speed units. I don't have all the details but as I understand it the vanes turn with the slipstream and power a hydraulic pump to actuate the blades. The old Zlin acro airplanes had these.

The Avia S-199 and CS-199 have different engines to the DB of the 109, in fact the Junkers Jumo 211 of the Heinkel He 111, and the massive paddle blade prop made an already bad aircraft's take-off characteristics an even worse; resulting in the nickname 'Mule' in Czech service. The Israelis were happy to receive them though...

http://en.wikipedia.org/wiki/Avia_S-199

Interestingly this is is a CS-199; the two seat trainer variant.

Those spinners on the Aero are typical for that engine prop combination (Argus 410) and are prop controls as mas said. Seen on the Arado 96, Pilatus P-2 et al.

_________________
James K

"Switch on the underwater landing lights"
Emilio Largo, Thunderball.

www.VintageAeroWriter.com

whoa, the screw on that 109 is intense!

Those Avia 199s would be easily one of the fuggliest warbirds around

aerovet,
Seeing that you are located in Holland perhaps you could ID a plane.....I had corresponded with a fellow over there involved in the static restoration of a twin engined Koolhoven. It is equipped with Wright R975s and was on floats at one time. That's about all I know. He sent me a couple of original pics of engine installation but the model of Koolhoven it is escapes me. Any ideas?

Thanks mas and JDK.

Learn something new everyday. Isn't the internet cool?

_________________
Greg Schneider
E Fighter Productions
"There is a big difference if you are in actual war or if you are playing war." Hartmann, Jagdgeschwader 52

As stated, those propellors are constant speed or variable pitch, but they are aerodynamically operated. Most other constant speed props at the time were hydraulic, like the Hamilton Standards or electrically operated like the Curtiss Electric, like on the P-38 and P-40. the Messerchmitt Me-108 "Taifun" originally had that same type of design.
This is totally a guess, but my suspicion is that the fins are spun when advancing into a relative wind. So if the airplane is at idle or holding the brakes, the prop pitch is "flat" or fine pitch. If the relative airspeed increases, the fins spin faster and enable the propellor to go to cruise or "coarse" pitch, unless the pilot adjusts the propellor control manually back to the fine pitch.
No airspeed, no cruise pitch setting. Makes sense from the perspective of how most constant speed airplanes are operated.

Hi Greg,
No problem - there's a lot of interesting aircraft out there. Marine Air, sounds convincing, thanks.



See: http://www.koolhoven.com/

Can't see anything that completely fits the description. There's the FK-49a:



Or have a look here:

http://www.koolhoven.com/history/airplanes/koolhoven/

As to restorations at the moment, there's the FK51 underway:

http://www.koolhoven.com/reconstruction/fk51/

But that's a single engined land plane.

_________________
James K

"Switch on the underwater landing lights"
Emilio Largo, Thunderball.

www.VintageAeroWriter.com