Need Front Face Picture of ...

[Milton Shupe]

An Avia R-12 engine. I thought this might be the best place for a chance to find such a thing.

I have a nice side picture but need the front face for the details.

Thanks in advance for any help offered.

[Hurricane91]

Searching. Will you be needing three of them?

[Milton Shupe]

Searching. Will you be needing three of them?

Three engines, one good bmp. :-)

And, if you can find any info on the Avia 156 other than data at Wikipedia, that would be great.

[Hurricane91]

So far have only found photos of the RK 12's big brother, the RK 17, but it had nine jugs. Dang.

http://en.valka.cz/files/img_0361_186.jpg

Will keep looking.

[Moses03]

You revisiting the Avia 51 Milton? It had the RK 12's. The 156 was fitted with a Hispano-Suiza from what I have read.

http://www.avia-club.com/models.php

You probably found this already:

http://www.flightglobal.com/pdfarchi...34 - 0054.html



All I had in my library was a couple of pages from Howson's Aircraft of the Spanish Civil War. Maybe Lefty will be along with something?

[Milton Shupe]

So far have only found photos of the RK 12's big brother, the RK 17, but it had nine jugs. Dang.

http://en.valka.cz/files/img_0361_186.jpg

Will keep looking.

Thanks, I appreciate that a bunch!

You revisiting the Avia 51 Milton? It had the RK 12's. The 156 was fitted with a Hispano-Suiza from what I have read.

http://www.avia-club.com/models.php

You probably found this already:

http://www.flightglobal.com/pdfarchi...34 - 0054.html



All I had in my library was a couple of pages from Howson's Aircraft of the Spanish Civil War. Maybe Lefty will be along with something?

Thanks Moses. yes, had the flightglobal one, but the other pictur eis the best quality I have seen.

Thanks

[lefty]

Three-quarter shot is the best I can do, Milton. Hope it helps. regards, Mike

[Hurricane91]

The best photo I have of the Avia 51. I will see if I still have acess to Jane's and Aerosphere. I seem to remember that Glenn Angle's Aeroshpere had a large section on engines. The earliest Aerosphere that I am aware of was published in 1939, but Mr. Angle may well have carried photos on the RK-12 to fill out the Czech engine catagory.

Attachment 51588

...a discussion of the Avias at a modelers site...
http://www.modelforum.cz/viewtopic.php?f=310&t=45961

[Milton Shupe]

Three-quarter shot is the best I can do, Milton. Hope it helps. regards, Mike

That's the best picture I have seen of this engine Mike. I appreciate your help.

The best photo I have of the Avia 51. I will see if I still have acess to Jane's and Aerosphere. I seem to remember that Glenn Angle's Aeroshpere had a large section on engines. The earliest Aerosphere that I am aware of was published in 1939, but Mr. Angle may well have carried photos on the RK-12 to fill out the Czech engine catagory.

Attachment 51588

...a discussion of the Avias at a modelers site...
http://www.modelforum.cz/viewtopic.php?f=310&t=45961

Now, you have just made available the very best quality picture I have of this beauty, Thank you Sir! Awesome!

[Moses03]

Nice find Hurricane. That is a great shot.

[Hurricane91]

I found some additional information on the Avia engine in the 1939 edition of Aerosphere. There are descriptions of the R12, RK12, and RK17 that allow comparisons but no picture of the R12.
There was no mention of the Avia 51 or the 156.
The 1940 Jane's All The World's Aircraft had neither the aircraft nor the engines (they did have the FW-198).

Until an adequate R12 photo surfaces, perhaps a "photoshopped" R17 could be substituted.
The dimensions given in Aerosphere between the two are very close. The R12 was 41.22 inches in length, and 42.7 in diameter. The RK17 was 41.93" long and 40.61" in diameter.
The design of the cylinders, heads, and accessories all appear identical. The primary visual differences are the number of cylinders and some crankcase details.
The aeronautical holdings at the Linda Hall technical library are vast and I would be happy to research further as time permits. Hope this helps.

John

[Milton Shupe]

I found some additional information on the Avia engine in the 1939 edition of Aerosphere. There are descriptions of the R12, RK12, and RK17 that allow comparisons but no picture of the R12.
There was no mention of the Avia 51 or the 156.
The 1940 Jane's All The World's Aircraft had neither the aircraft nor the engines (they did have the FW-198).

Until an adequate R12 photo surfaces, perhaps a "photoshopped" R17 could be substituted.
The dimensions given in Aerosphere between the two are very close. The R12 was 41.22 inches in length, and 42.7 in diameter. The RK17 was 41.93" long and 40.61" in diameter.
The design of the cylinders, heads, and accessories all appear identical. The primary visual differences are the number of cylinders and some crankcase details.
The aeronautical holdings at the Linda Hall technical library are vast and I would be happy to research further as time permits. Hope this helps.

John

Yes sir John; I appreciate that. And when time allows, further research would be most helpful.
I have started the project as a filler while awaiting other things in process.

I appreciate your interest and help.
This era of aircraft is somewhat neglected, and I really like the looks of this one.

[lefty]

Technical details....

[Milton Shupe]

Wow! Great find John! That will be helpful for the flight model.

And speaking of technical details, one of the most frustrating things for me is the painstaking process of modeling the fuselage and its face, and major body parts when dimensions are not available, relying solely on a 3-view.

Compare this picture with the 3-view here in gmax.

Note the huge differences in engine sizes and shapes. strut sizes, window and door placement, look at the tail section between door and tail, and general fuselage shape.

So, just a thought when we are critical of designers ...

And this is not to be critical of creators of 3-viewss, they work with the same limited info that we do.

But this is so frustrating and isthe reason I can easily invest 50-100 hours just trying to get the fuselage right comparing 3-views with pictures.
There simply is no substitute for having access to a real aircraft.

[Moses03]

This era of aircraft is somewhat neglected

Yes Sir. I'm just glad you have interest.