In the gross sufficient reason for that enthusiast feathered, a great Cougar will climb fifty fpm from the 4,250 base, maximum, less than simple requirements
In lieu of that have lapped and riveted skins, This new Cougar’s was fused into bulkheads and ribs developing its fuselage, empennage and wings As a result, a slicker airframe, a significantly easier looks and, as reported by customers, a lot fewer complications with corrosion. In addition, the reduced portions of one’s cabin fuselage are produced from solid but lightweight aluminum honeycomb. Nevertheless the greatest difference are, of course, new Cougar’s 160-horsepower Lycoming 0-320 motors. Brand new Duchess and Seminole has 180-horsepower O-360s. There is also prevent-spinning propellers, hence eliminate the crucial-system bugbear. Both of the fresh Cougar’s props change clockwise; for this reason, a beneficial pilot officially have to have a difficult go out talking about good inability of remaining (critical) engine, because correct prop requires a bigger chew and you will supplies significantly more asymmetric push versus kept.
The latest Cougar, Duchess and you may Seminole tend to be the exact same in one single city: single-motor abilities. The three carry out miserably after dropping a motor into takeoff. New Cougar POH indicates that, on sea level toward a basic day as well as the terrible lbs out-of step 3,800 lbs, brand new planes have a tendency to climb up at about 2 hundred fpm on a single motor, if your pilot really does everything you right (cobs the great motor, feathers this new crappy, has got the methods and you can flaps upwards, and stuff like that).
According to the conditions detailed significantly more than, the newest airplanes have a tendency to struggle right up a mere 140 foot each kilometer it trip along side crushed. The help of its 180-hp motors, this new Duchess and you may Seminole try not to do much better. Its unmarried-engine costs-of-ascend and you may go gradients is actually, respectively: 235 fpm and you can 166 foot each mile; and you can 217 fpm and you may 148 base for every single mile. You to definitely meager performance comes less than important criteria; cure a motor in virtually any of the airplanes on the takeoff out of Denver to your a hot big date, and the number probably might have negative cues facing them.
In contrast, the newest unmarried-engine provider ceilings of your Duchess and you will Seminole was six,170 foot and you will 4,one hundred foot, respectively. An excellent Ways However it does maybe not perform well on one engine, the brand new Cougar have a beneficial manage functions,on account of a large the quantity for the airplane’s grand tail. Vmca, the minimum manage price with an engine out, are 61 tangles-a couple knots less than appears rate having landing hardware and flaps stretched. Appears strips into leading sides of your modified laminar-move NACA 63A-415 wing result in the wing origins to stall long before the latest hps
If a 2 hundred-fpm rate-of-climb doesn’t voice all of that bad, consider the Cougar’s unmarried-system results one other way: that’s, with respect to rise gradient
We were provided a presentation of your own Cougar’s docile ways by Gil Stout of Traveling Tigers in Marietta, Pa., an old Grumman broker whoever specialties however are Cougar sales and you may provider. In the 1,five hundred ft into the an enjoying day, Stout power down just the right engine, feathered the newest prop and made good cuatro
education turn into the fresh new dry motor. No problem. After that, he removed the brand new nose way up. The brand new stands buzzer shrieked just like the Cougar shook instance. better, a wet pet. You to wing dropped, then the almost every other; however, Stout were able to pick them up toward rudder each time. Meanwhile, we were sinking at about 500 fpm; but, on demonstration, brand new flat never ever gave people sign it was about to do something boeddhistische dating site naughty. Due to minimal lift travelling, it is hard to help you stall good Cougar rather than abrupt control deflection. You will find a trade-off, not. Based on citizens, a good airplane pilot and also make a power out of landing with full flaps into the a plane stacked towards the its leading seats. send cg restriction is also lack lift power about flare and you can plunk upon every three rims, particularly if airspeed was a tad too at the top of strategy.