> Hello Steve,
   >
   > In the picture shown there are passages around the intake pipe. Could
   > you comment on what those were for. Is that gear teeth surfaced item on
   > the front a counterweight that also drives acessories? If so very
   > clever. You talked about the coolant routing on a previous email but
   > didnt get to specific. Could you comment more on the coolant path of
   > that engine. I undersatnd that the entrance water hits the plug bosses
   > but how does it axially flow to the exit. Is the centerhousing a circum.
   > flow design?
   >
   >
    Rob Woods


   Rob--my apologies for now getting back earlier to you with responses to your
   questions.

   1. Passages around ports.  What you see in the photo is machining related to
   installation of the throttle shafts and levers....with shafts, levers and
   butterflies not yet installed.

   2. Counterweight--nice deduction on your part.  This one part machined from
   steel billet served several functions-- eccentric shaft counterweight,
   starter ring gear, trigger wheel interruptor segments for the infared
   electronic ignition modules and v-belt drive for accessories.

   3. Coolant--cold water entered the spark plug cooling jet manifold and
   flowed axially from center housing.  If you don't have the other photos
   showing the various water and oil hoses and routing, I can get them to you.

   Steve Beckham

Hello Steve,

I have seen pics of the plates by themselves along with installed ones
in planes with the hoses going different directions. I guess I am
confused as to where the coolant goes after the plug bosses. Does it
come in the middle and then split off fore and aft axially through the
other housings and then back to the center housing and that brazed bung
I see.

Also there has been much mention of your sheet metal housings. There was
discussions of getting some pics up some time ago but I haven't seen
them yet. Do you have those available? Also how much post machining wa
necessary with those housings after brazing? Did the creep at all in the
process? What material were they made out of and what was the brazign
brocess you used in terms of material and heat cycle?

Rob Woods