WIX Archives
Re: Some more info...
Posted by Christer on Thu Dec 19, 2002 07:36:28 PM
In reply top Some more info... posted by Tom on Thu Dec 19, 2002 01:10:27 PM
I?ve been busy for a couple of days and haven?t had time to post until now (and it?s late, over midnight here already) but that?s about my conclusion too.
It can?t have been a straight copy since the dimensions don?t match and if the Ash-82 is considered a copy of the Wright Cyclone 2600 then the BMW 801 might be as well since the dimensions of that one isn?t that far off the mark.
The russian historians are having trouble tracing the heritage but that?s understandable since there were/are 7 and 9 cylinder radials and, 14 and 18 cylinder 2-row radials all called Cyclone.
They all have one thing in common and that?s the bore of 155.6 mm.
The stroke varied between 174 mm for the 1820 series and 160.2 mm for the 2600 and 3350 series.
If You keep these dimensions in mind when/if You read the webpage below You?ll see what I mean, a slight mix-up between bore and stroke:
http://www.aviation.ru/engine/ASh/
In the next webpage a german historian says that the 18 cylinder and 9 cylinder engines have the same cylinders, they don?t. If they did the Cyclone 3350 would have been the 3640 ...... but he?s got the bore right.
The Ash-82 wasn?t a 12 cylinder 2-row radial though, I?m sure it?s a typing error, otherwise the ignition timing would be interesting:
http://www.fluggeraet.de/e_ash82.html
The final webpage shows that at least some germans think that the Ash-82 was/is a copy of the BMW 801 (or the other way around). 156 mm x 156 mm are the exact dimensions of the 801 cylinders (at least according to my sources):
http://www.luftfahrtmuseum.com/htmi/itf/ash82.htm
Now I?m going to snore a few ZZZZZZzzzzzz!
Christer