Ray Yillik Cessna 340A Owner/Pilot "I thought I'd write and let you know the performance results of your intercooler kit on my 1981 Cessna 340A. Here they are: I am averaging 200 FPM increased rated of climb from sea level to 18000 feet. True airspeed has increased from 198 KTAS at 18000 feet (70% Power) to 208 KTAS. Also, I want you to know that I was very impressed with the quality of the component parts in the kit. Being a manufacturer myself I appreciate well-made items, and every part in your kit was of the highest quality and workmanship. You can definitely count me as a satisfied customer!" Ray Yillik, Cessna 340A Owner/Pilot James White Cessna 340 Owner/Pilot "I'm writing you to thank you for your assistance in equipping my Cessna 340 with American Aviation ULTRAcooling. As you know, this aircraft was an original 340 (285 HP engines) and had very marginal single engine performance. My greatest concern was the possibility of an engine failure on take-off, especially at higher gross weights and outside air temperatures. The lack of adequate single engine performance made me think that an off-airport forced landing was the likely outcome for too many situations given an engine loss under common ambient conditions and payloads. By installing the American ULTRAcooling, it was possible to increase maximum engine power to 310 HP. The initial climb rate has increased significantly - with a 400-500 fpm increase being indicated under similar atmospheric conditions. However, the most important aspect to me is that the single engine climb rate, with the critical engine out, has increased approximately 200 fpm. I am now confident that I can lose the left engine (with the aircraft at gross weight and with an OAT of 35C) and still maintain an climb rate of 350 fpm. This means that continued flight is an acceptable alternative; an alternative that wasn't acceptable with the aircraft prior to installing the ULTRAcooling.  Back to Top A second advantage of the ULTRAcooling is the added flexibility in selecting cruise power configurations. With the previous configuration, maximum manifold pressure in cruise was 28 in-Hg. This "Top of the green" manifold pressure and 2300 rpm (67% power) would produce a TAS of 178 knots in the mid-teens. The ULTRAcooling now permit a cruise power configuration of 32 in-Hg and 2200 rpm (70% power) which provides a TAS of 192 knots at the same altitudes. The fuel burn increases, too, but the additional flexibility of selecting the most appropriate speeds and fuel consumption is an appreciated advantage - especially for the 200 to 400 nm trips that we frequently take in our 340. In addition to increasing my comfort level with the aircraft's single engine performance, along with increasing its utility, this conversion will make it possible to further increase maximum engine power at that time in the future when the current engines are overhauled. Again, thank you for all of your efforts in making the American Aviation ULTRAcooling conversion possible for my Cessna 340. I'm no longer attempting to do the impossible - trying to justify the purchase of an early King Air or Cheyenne." James White, Cessna 340 Owner/Pilot  Back to Top Charles B. Layton Cessna 340 Owner/Pilot "For more than 11 years I have flown Cessna 340 N1BY. A few months ago I had an American Aviation turbo ULTRAcooling System installed to replace the original units. I must say that the past few months of flying with the new ULTRAcoolers have been more enjoyable and satisfying than all of the other years combined! I can actually feel the additional power that comes from the new ULTRAcoolers working for me; starting at takeoff, and then climbing all the way to altitude. I also enjoy cruising right along with the King Airs. Most of our flights are loaded near to or at maximum allowable takeoff weight. What a wonderful feeling of security it is to know that additional single engine climb performance is now available in the event of an engine out on takeoff. I highly recommend the American Aviation ULTRAcooling System to all Cessna 340 operators." Charles B. Layton, Cessna 340 Owner/Pilot Back To 340 Page