Ron Natalie wrote:
You're not likely to see it. One of the criteria for getting that
STC is to flight test for the conditions condusive to vapor locking.
Most commonly they are high ambient temperatures and very low fuel
flow rates, low pressures. In my plane (not approved for avgas) the
^^^^^^^^^^^^^^^^^^^^^^

Ah, er, don't you have a typo there, Ron?

I thought you had converted your Navion to some flavor of 550. To the
the best that I know, all such engines are approved for avgas. If anything
I would say that they are not approved for autofuel.

--
Frank Stutzman
Bonanza N494B "Hula Girl"
Hood River, OR (soon to be Boise, ID)