Drawing of a dynafocal mount.

Anybody have a drawing of an O-320/O-360 dynafocal mount.
They are the same are they not?

Paul Lamar


David Leonard wrote:


Paul,

It depends on the specific dash number of the engine.  Could be either

type 1 or type 2 dynafocal (most are type 1) or even a conical mount.

If

you have a specific engine in mind I can look it up.

Dave Leonard

I was hoping there would be a common dynafocal mount that fit most
O-320's O-360's.

Paul Lamar

Here is what I am thinking about. Use Royce's idea of milling down
the front end housing to save 80% of the weight. Use just the cast iron
hardened wear surface. That is about a 36 pound weight saving right there.
Cast a new aluminum water-jacket/water-pump-housing/front-cover all in
one piece with built in dynafocal mounting points.

This would make it real easy to bolt
a rotary into almost any airplane. MecanAir is doing something similar
but they are not selling the front cover. To my way of thinking this
is a mistake. The only way the market for a certified aircraft rotary
will ever develop is if there are a bunch of experimentals airplanes
out there flying with rotaries. The way to do that is make it easier
for people to install rotaries in experimentals.

I don't have the resources and time to pull this off.

Paul Lamar


 Terry Adams wrote:


A ready made dynafocal mount is a great idea.  But, am I missing something?
My Thorp T-18 has a dynafocal mount, and when John designed it he put in
down thrust and side thrust to compensate for the rotation of the propellor.
When I built my engine mount for my rotary I reversed the side thrust
because the propellor turns the opposite direction.  Tracy which direction
does your propellor rotate?  and don't most airplane designers build in side
thrust?  If you make a new casting of the front are you offsetting it by
some amount - but how will that compare for different designers?

Terry Adams


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