On terrible sufficient reason for one to enthusiast feathered, good Cougar usually rise 50 fpm in the cuatro,250 foot, maximum, lower than important criteria
In place of having lapped and you can riveted skins, The new Cougar’s is actually bonded to the bulkheads and ribs building the fuselage, empennage and you will wings As a result, a beneficial slicker airframe, a significantly smoother physical appearance and you will, as reported by people, a lot fewer complications with corrosion. On top of that, the low portions of the cabin fuselage are produced from solid but smaller aluminium honeycomb. Nevertheless the greatest huge difference is, obviously, the new Cougar’s 160-hp Lycoming 0-320 engines. The fresh Duchess and you may Seminole enjoys 180-horsepower O-360s. There is also counter-rotating propellers, and that get rid of the vital-motor bugbear. Each of the fresh new Cougar’s props turn clockwise; therefore, an effective pilot officially need a more difficult time writing about good inability of your leftover (critical) system, while the best prop requires a bigger chew and you can provides more asymmetric thrust compared to kept.
The Cougar, Duchess and you may Seminole are a lot the exact same in a single urban area: single-engine performance. Every about three perform miserably immediately after shedding an engine toward takeoff. New Cougar POH suggests that, within sea-level to your an elementary day and at their disgusting pounds of step three,800 pounds, the fresh new plane will rise at about 200 fpm using one motor, if the pilot do what you right (cobs the nice system, feathers brand new bad, contains the knowledge and you can flaps upwards, and the like).
Beneath the standards detail by detail over, the latest jet have a tendency to endeavor up only 140 ft each kilometer it journey over the floor. Along with their 180-hp motors, the Duchess and you will Seminole cannot do best. The unmarried-motor costs-of-go up and you may rise gradients was, respectively: 235 fpm and you will 166 foot for every kilometer; and 217 fpm and 148 feet each kilometer. One to meager overall performance appear lower than fundamental standards; treat an engine in just about any of your planes for the takeoff from Denver for the an attractive big date, therefore the wide variety most likely would have bad cues facing them.
In comparison, brand new unmarried-engine service ceilings of your Duchess and Seminole was 6,170 ft and 4,one hundred base, correspondingly. An effective Ways But it does maybe not succeed on one system, the newest Cougar enjoys good handle features,on account of a giant extent into the airplane’s huge end. Vmca, minimal manage rate having a motor aside, are 61 tangles-two knots below stands rate which have landing resources and you will flaps prolonged. Appears pieces to your leading edges of your own modified laminar-move NACA 63A-415 wing result in the side sources to help you appears a long time before the hps
When the an excellent two hundred-fpm rate-of-climb doesn’t voice all of that crappy, check out the Cougar’s solitary-engine efficiency another way: that’s, with respect to ascend gradient
We had been offered a demonstration of one’s Cougar’s docile manners by the Gil Stout regarding Traveling Tigers in the Marietta, Pa., a former Grumman agent whoever areas however were Cougar conversion and you will services. At the 1,five hundred base on a warm go out, Stout shut down ideal motor, feathered the fresh new prop making a beneficial cuatro
education come to be the newest deceased engine. No problem. Up chat avenue Desktop coming, he drawn new nostrils way up. The new stall buzzer shrieked since Cougar shook instance. better, a rainy pet. You to definitely wing fell, then most other; but Stout managed to get them for the rudder when. Meanwhile, we were sinking at about five hundred fpm; however,, on trial, the new jet never ever provided people signal that it was about to make a move slutty. On account of limited lift travel, it is hard to appears an effective Cougar in the place of sudden manage deflection. There’s a trade-off, not. Predicated on people, a beneficial pilot and work out an electrical power away from getting with complete flaps in an airplane stacked to your their the leading chairs. give cg restrict is lack lift expert from the flare and you will plunk upon all about three wheels, particularly when airspeed try a touch too on top of approach.