Mailing List flyrotary@lancaironline.net Message #52258
From: Kelly Troyer <keltro@att.net>
Subject: Modified Cooling System
Date: Sun, 26 Sep 2010 20:52:49 -0700 (PDT)
To: Rotary motors in aircraft <flyrotary@lancaironline.net>

    Lynn,
        This is a four Rotor made from two 13B engines by "Granny's Speed Shop" http://www.grannysspeedshop.com/  in
Concrete, WA..............Interesting but to me the most interesting thing is the modified cooling system.........Their website
has a lot of info on how the two engines were coupled together but they have yet to provide what internal modifications were
made to direct coolent flow in the proper directions after it is connected to the center housing.........This system would seem
to address the fact that the rear rotor runs somewhat hotter than the front rotor in the stock cooling system.........
 
       I am interested in your opinion as to if the benefit would be worth the trouble to implement such a cooling system ?.....
I have heard that the rear rotor tends to fail more often than the front perhaps because it runs hotter..........Has anyone to
your knowledge ever documented how much hotter the rear rotor runs as opposed to the front rotor ?.............
 
Kelly Troyer
 
 
 
 
   

THE 4 ROTOR WE MADE FROM (2) 4 PORT 13Bs.


From here can seen the aluminum adapter plate between the two engines, which features the lifting eye that you see sticking out of the top/center of the engine. The external cooling plumbing can also be seen entering and leaving the center housings, as can the dual oil filter setup, which serves as a distribution manifold for supplying oil to the rear engine. The huge airbox filters out the dirt clods using a reinforced furnace filter (hey, I was on a budget). A Chevy power steering pump assists a Ford power rack & pinion steering gear. Unseen behind the firewall is a custom made planetary "quick steer" box, which speeds things up quite a bit, resulting in 1 turn lock to lock steering. No need to take your hands off the wheel, no matter how out of shape you get!
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