Robert J. Riordan
Businessman and Chieftain Owner/Pilot
"After installing ULTRAcooling on our Chieftain we are now seeing 13 knots more speed on the same fuel. We installed the ULTRAcoolers at 700 hours, and at TBO they will have paid for themselves in fuel saving alone.
But speed and fuel savings aren't the main reason I bought the system. I operate out of a 2450 foot-long strip, and I wanted faster acceleration to single-engine climb speed. The ULTRAcoolers give me that."
and I can definitely feel the difference!"
Bob Riordan, Chieftain Pilot
Corporate Pilot
"Our company installed your ULTRAcooler System on our 1981 Navajo Chieftain... Since then we have operated it an average of 30 hours per month. We operate it at 65% power, 10,000 ft. altitude. At 27" manifold pressure and 2200 RPM, our cruise is 180 knots with a fuel burn of 30 gallons per hour. The cylinder head temperatures stabilized at 410 degrees.
We figure we save a conservative $3500 per year in fuel costs alone. We figure our engines will easily make TBO time. If we lose an engine coming out of the 3300 ft. airstrip we operate out of, that added horsepower could make the difference. Our aviation consultant has stated many times that we will easily cover our investment in ULTRAcoolers with added resale value.
Our chief financial officer just stated that our decision to invest in ULTRAcooling was a "no brainer"!"
more products to improve our Navajo?"
Tommy Bagwell, Corporate Pilot Back to Top
Brett Lohman
Businessman, Panther Navajo Owner/Pilot
"When we added the American Aviation Turbo-ULTRAcooling System to our Panther Navajo, we picked up approximately 15 knots additional airspeed. On a standard day at 10,000 feet, we are now seeing 195 knots true airspeed at 30 inches and 2,200 rpm. At 75% power we see 205 to 210 knots depending on outside air temperature.
At 23,000 feet, 55% power delivers 205 knots TAS; over 225 knots at 75%. ULTRAcoolers give me more available power up there without running excess fuel for engine cooling. And we can now cruise with cowl flaps fully closed, even in the hot summer, at 65% power. Before, we had to cruise with cowl flaps open to keep cylinder head temperatures down>
When range is a concern, we throttle back to 55% power and see the same speed we used to get at 65%. We're also burning about six gallons per hour less fuel at that setting. At 300 hours a year, that amounts to a $3000 saving.
Cooler operating temperatures alone make our American Aviation ULTRAcoolers a worth while investment. Add the extra speed, fuel savings, and safety from more available power, and I have made what I believe to be a very sound business decision to purchase the American Aviation System."
Brett Lhoman, Panther Navajo Owner/Pilot
Back to Top
Chieftain Owner/Pilot
"The engines now produce full power from sea level all the way up to cruising altitudes; which means I climb faster and level off sooner.
I customarily cruise at 55% power, and now look at true airspeeds of 196 to 205 miles per hour, depending on the aircraft's load. That's 12 to 15 mph faster than before, and the aircraft's overall efficiency, miles per gallon, has been significantly increased.
In addition to improved performance and efficiency, I also feel that safety margins have been substantially expanded. Restoring the engines to full rate power at all altitudes, especially in an engine-out situation, has certainly enhanced my peace of mind."
James Purdy M.D., Navajo Chieftain Owner/Pilot
Back To Navajo Page