Jim Stewart wrote:

Have you ever flown behind a 912 or a
914? I have never had a nicer engine
in any vehicle I've owned. Smooth,
strong and light, 5 gallons an hour in
cruise, absolutely *no* issues to date.


If you want smooth you ought to fly behind a Jabiru or the poor man's
version the Corvair. 6 is better than 4 for smoothness.