My STOL 750 has a Jabiru Gen 4 with a 7-row Aero Classic oil cooler.  The Jab 3300 Gen 4 was virtually "plug and play" as far both oil and air cooling was concerned - no tweaking or mods necessary.  In fact, it oil cools a bit too good because in cold weather  (for East Tennessee) the oil temps run at the very low limit and I usually put a piece of aluminum tape across approximately 50% of the oil cooler fins to keep the temp up.  We recently had an unusually warm day (for November in East Tennessee) and I just guessed and peeled-down the tape to about 25% coverage and that worked out well.

However, at the time I did think "It sure would be nice to have a shutter or flap to be able to adjust the oil cooler airflow on-the-fly!" (pun intended!)  I know that "Anti-Splat-Aero" makes an oil cooler shutter for just that purpose. 

Just wondered if any of our builders have experience with this, and if on a Jabiru 3300 Gen 4, all the better! It can be mounted either in front of, or behind the cooler.  Behind (downstream) seems counter-intuitive, but if sealed between the cooler and the shutter, it should work equally well.  I bring that up because the area behind my cooler would make access and installation much easier.

I also guess that some of our builders have probably devised their own versions of oil cooler airflow control and would be interested to see alternatives to the Anti-Splat-Aero shutter.

Thanks,

John

N750A