reprinted from: 

IN FLIGHT USA (NEWTECHNOLOGY)July 2002

BEAT THIS: A 150-MPH CHEROKEE FROM POWER FLOW

Daytona Beach, FL.-  Most Cherokee 140 owners are going to have difficulty believing the claim that, with an STC’d Power Flow tuned exhaust and a set of STC’d Laminar Flow speed mods, a Cherokee 140 will cruise at 150 mph.  That represents a 21 mph gain in speed over a stock aircraft.

The rate of climb also improves with the “Flows.”  In stock configuration, the 140 goes from 1,000 feet to 8,500 feet in 18:46, averaging 400 fpm.  When modified, it reaches the same altitude in 14:30, with an average ROC of 517 fpm, a 30-percent increase in rate of climb.

 

 

 

 


By combining patented Power Flow tuned exhaust technology with new Laminar Flow products, the Cherokee 140 will perform like a Cherokee 180

“To achieve and maintain the cruise speed of 150 mph at 7500 feet, it may be necessary to repitch the propeller,” said Darren Tilman, Power Flow general manager.  “You can still hit 150 without repitching, but it takes some hunting.  Without the prop change, the 140 we tested easily held 146 mph at 8500 feet, and we did, on a couple of flights, achieve an MTAS of 150 mph at 7,500 feet.”

Tilman is quick to point out that not all Cherokee 140’s were created equal: some will benefit greatly, while others won’t to the same degree.  Power Flow has indicated that, with all the products in place, the increase in speed can vary from 15 to 30 mph.

 

 

 

The patented Power Flow tuned exhaust system brings exhaust tubes of the same length into a common collector, eliminating back pressure while increasing engine efficiency.  “it’s like adding 15 to 25 horsepower,” says Tilman.

Laminar Flow, a sister company to Power Flow, has prepared a kit that consists of flap gap seals, aileron gap seals, flap hinge fairings, wing smoothing/fuel tank fairings and a new set of wheelpants.

It takes about a week to install the exhaust and Laminar Flow products.  The materials packages we priced are $3,675 for the Tuned Exhaust system and $3,410 for the Laminar Flow.  Individual Laminar Flow products may be purchased separately. Both products come with an unrivaled 60-day money back satisfaction guarantee.

“The key here is that, for a hair over $7,000, you can upgrade a Cherokee 140 to rival or exceed a Cherokee 180 in performance, but with a much better fuel burn.  That’s a pretty sound investment,” said Tilman.

For further information, call (386) 253-8833, (877) 693-7356, or visit www.powerflowsystems.com