Hey guys...
Dart is right, its a [link=http://www.keleo-creations.com/]Keleo[/link] muffler putting the pipes in the scale location and makin' em work
The prop assembly is from NRG [link=http://www.soloprops.com/]Soloprop[/link] and is pitch adjustable to whatever you want. Final blade diameter about 20".
The muffler needs to be modified a little because of the prop drive extension, but nothing a little aluminium welding wont fix.
There is some more pics of this in my [link=http://www.rcuniverse.com/forum/m_6457176/tm.htm]build thread[/link] at the end of page 2 if you are interested...
Cheers
Goose