ASA New Product Video is up! (July 2014)

[Mike H]

Is this top side installation aft of the baffling? If installed forward of the baffles then cooling air would not be forced through the cylinder fins.

[PerfTech]

Originally Posted by Mike H

Is this top side installation aft of the baffling? If installed forward of the baffles then cooling air would not be forced through the cylinder fins.

... Yes! This installation is behind the baffles, as far back as possible. Thanks, Allan...

[ajay]

on top has the added benefit of the visual confirmation. cool...

ajay

[rvator51]

We have about 22 hrs on our RV-4 installation and 10 take offs and landing and only had one cylinder go over 400 to 405 one time. This is way better than before the installation. Very happen with results.

[PerfTech]

Originally Posted by rvator51

We have about 22 hrs on our RV-4 installation and 10 take offs and landing and only had one cylinder go over 400 to 405 one time. This is way better than before the installation. Very happen with results.

...Thomas, did you install one or two EZ Cool flaps? Thanks, Allan...

[rvator51]

Hi Allan,
I only installed one. I don't think there is room for two unless you could do a tandem configuration. But the front one might hit the airbox on the RV-4.

[jchang10]

That would be interesting to see an RV with the vents on the upper cowl. ala Rutan's catbird and boomerang and maybe others.

[PerfTech]

Originally Posted by jchang10

That would be interesting to see an RV with the vents on the upper cowl. ala Rutan's catbird and boomerang and maybe others.

... These airplanes had updraft cooling and were pretty much a completely different animal in that regard. We are still waiting for more results on his testing of the EZ Cool flaps installed on the top and will post as soon as available. Thanks, Allan...

[guccidude1]

I bought one of the AS cowl flaps in July because I had CHT problems on #4 cyl on my O-360-A4M in my -9A. On takeoff I would routinely see 420F on #4 and 390-400F on the other 3 cyl. I could control the CHTs by pulling some power and leveling off to get 125 KTAS. I had sealed all the openings on the baffling and re-wickering the baffle seals, but nothing seem to correct high CHTs on takeoff and climbout short of leveling off and pulling some power.
I installed the AS cowl flap on the right side of the lower cowling near the aft end where the curvature is fairly level. Installation of the cowl flap was straight forward with no surprises, but the wiring was tough. That small wires and the connector was definitely not designed for use with ham-fisted pilots. Getting insulation peeled back without cutting strands of wires was a chore and the connector has no safety lock. Soldering those miniature strands of wires to the supplied switch was another adventure in funland with vulgarity added. I hoped Alan's ears were burning.
HOWEVER, the cowl flap works as advertised. I can now take off and climb without #4 cyl not getting hotter than 395F, full power ant 110 KTAS to level off altitude. At level off, power set to 2550 rpm leaned to 8.5 gph (fixed pitch) 152 KTAS, closed cowl flap, all CHTs in the 360-370F range. With cowl flap open in cruise, the cyl temps drop to 330+or - 5F and the TAS drops 3 kts. I just returned from flying to the East Coast through Albuquerque, McKinny TX, Tulsa, Tunica MS, Richmond VA, Morgantown WV, Doylestown PA (just North of Philadelphia and back. With 21 days, 39.7 hours, I would say I gave the AS cowl flap a pretty good test in August in the hottest parts of the country and it passed with flying colors. I don't think I will put a second flap on the left side, the one works good enough. Alan, fix those ittybitty tiny wires and a lockable connector and the product would be perfect. Dan

[Smilin' Jack]

Alan's cowl flap went in beautiful and the effects on the cylinder temperature is near 18 degrees difference. Wow, all I can say is that this is one mod that really works I had louvers but this works great


I should probably buy another just to make it look bad!!!!


Smilin' Jack