SNIP...

I think David's idea is a  significant simplification for our cooling
systems and a major breakthrough  We can get rid of p-cans, the
overflow tanks, the complex plumbing, the continual re-introduction
of air into the system, it will work at all attitudes.  We can preset
the system pressure and monitor the systems health by looking through
clear/translucent canister or by monitoring the pressure gage inside
the cockpit.  In one simple stroke it transforms the auto cooling
system into a no compromise aircraft system.   Yahoo!!!!     Jerry

Hold on Jerry :)
Not true. In effect it is a P-can with a piston. Same structural   problems.
It is far more expensive to fabricate requiring precision machining.
Further more it has a nasty failure mode if steam is generated.

Paul Lamar ...No rotor no motor.

Why can't a small swirl pot be added with a radiator cap to protect
against the steam pressure failure mode? It would also provide a
place to fill the engine. I know you are a serious watch dog when it
comes to things getting too expensive and I appreciate that but we
don't yet know what off the shelf stuff is available that would not
require machining or what the final price would be.   Jerry

Why not just make the swirl pot bigger and do away with the  accumulator?

It is common sense if you make something in low quantities on a lathe
it cost more than the same size part mass produced in a
stamping press to loser tolerances.

Paul Lamar ...No rotor no motor.

Then we would be back to what we have now: a system that is not
sealed, not all attitude, needing an overflow system,  constantly
reabsorbing air.... We need to see what the final price will be.
The advantages are worth something, I think.     Jerry


You don't need a coolant recovery tank. That is largely what
this subject has been all about. Eliminating the coolant
recovery tank. The P-can system is sealed until you boil the engine.
It is not constantly reabsorbing air. The pressure on the coolant
is the same as if it had a piston.

The piston accumulator system  might have an application with a small
swirl pot added  with a radiator cap for air show aerobatics when you remain
inverted or knife edge for 20 to 30 seconds.

Paul Lamar ...No rotor no motor.

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