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In a variety of ways the latest Cougar differs from others a couple of light twins

During the disgusting sufficient reason for one to lover feathered, an excellent Cougar usually go up fifty fpm from the cuatro,250 foot, maximum, below basic requirements

As opposed to with lapped and you will riveted peels, The latest Cougar’s was fused for the bulkheads and you can ribs building their fuselage, empennage and you can wings The result is an effective slicker airframe, a much simpler physical appearance and, as outlined by owners, a lot fewer issues with corrosion. Additionally, the reduced portions of cabin fuselage are made of strong but small aluminium honeycomb. But the greatest distinction is, however, the fresh Cougar’s 160-hp Lycoming 0-320 engines. The latest Duchess and you will Seminole features 180-hp O-360s. There is also stop-spinning propellers, and this get rid of the crucial-motor bugbear. Both of the fresh new Cougar’s props turn clockwise; thus, good airplane pilot theoretically need to have a difficult date speaing frankly about a great failure of your own leftover (critical) system, once the right prop requires a much bigger chew and you may supplies far more asymmetric push than the leftover.

The new Cougar, Duchess and you will Seminole tend to be similar in one urban area: single-engine performance. Every around three do miserably immediately following losing an engine on takeoff. The newest Cougar POH demonstrates that, at sea level into a simple day at its terrible weight away from 3,800 weight, the airplane commonly rise around 200 fpm on one motor, in case the pilot does that which you proper (cobs https://datingmentor.org/cs/buddygays-recenze/ the nice motor, feathers the crappy, provides the technology and flaps upwards, and the like).

Beneath the standards outlined significantly more than, new airplanes often strive up just 140 base for every single mile it journey across the soil. Due to their 180-horsepower engines, the Duchess and you can Seminole cannot perform much better. The single-engine prices-of-ascend and you may ascend gradients was, respectively: 235 fpm and you may 166 legs for each distance; and you may 217 fpm and 148 feet for every distance. You to definitely meager overall performance comes significantly less than simple criteria; eradicate a system in any of your planes on takeoff from Denver on the a hot day, as well as the wide variety more than likely will have negative cues in front of them.

In contrast, the fresh unmarried-engine provider ceilings of Duchess and Seminole are 6,170 feet and cuatro,one hundred foot, respectively. A good Ways Although it does perhaps not work on a single system, the fresh new Cougar possess an excellent handle services,because of a huge the quantity to the airplane’s grand tail. Vmca, the minimum manage rate with an engine away, is actually 61 tangles-a few tangles lower than stall rates that have obtaining technology and flaps extended. Stands pieces into the top sides of changed laminar-flow NACA 63A-415 side result in the side origins so you can stands a long time before brand new hps

In the event that good two hundred-fpm rate of climb cannot voice all of that crappy, think about the Cougar’s unmarried-engine overall performance another way: that is, with respect to climb up gradient

We were provided a speech of one’s Cougar’s docile manners because of the Gil Stout out of Flying Tigers in the Marietta, Pa., a former Grumman agent whoever specialization nevertheless were Cougar conversion and you may services. In the 1,500 base on the a loving day, Stout shut down best motor, feathered new prop and made a beneficial cuatro

degree grow to be the fresh deceased engine. Nothing wrong. After that, the guy drawn the nose way-up. New appears buzzer shrieked once the Cougar shook like. well, a wet pet. One wing fell, then almost every other; however, Stout was able to pick them up to the rudder when. At the same time, we had been sinking around five hundred fpm; however,, on the trial, the fresh new planes never ever gave any signal that it was going to do something dirty. Due to restricted elevator traveling, it is sometimes complicated in order to stall an excellent Cougar without sudden handle deflection. There can be a trade-off, however. According to customers, an excellent airplane pilot to make an electrical power of obtaining with full flaps when you look at the a plane stacked into its leading chairs. submit cg restrict can also be run out of elevator power throughout the flare and you will plunk upon all of the three tires, particularly if airspeed is a touch too high on approach.