Prior to that, we leased a 340 Ram VII. A typical cruising altitude in the Cessna 340 is around 18,000-21,000’. This airplane is certificated in the normal category. The engines seemed to run more smoothly and they were noticeably more powerful and fuel efficient. Will consider trading for a SR22 with TKS. Already a member? So in 1976 Cessna introduced the Cessna 340A, which was now fitted with 310 hp TSIO-520-Ns.
Read More... For instance, while the standard 414 intercooling system allows induction temperatures to vary between 180 degrees F to 200 degrees F at altitude, ULTRAcooling (under the same conditions) maintains temperatures between 70 degrees F and 90 degrees F. At medium altitudes ULTRAcooling reduces the induction air temperatures, approximately 110 degrees F. To understand what that means to your engine, try remembering the last time you flew an aircraft with carburetor heat. The airplane has a 28-volt, negative ground, direct current electrical system powered by an alternator on each engine and a 24-volt battery. The power loss in cruise resulted in a penalty of 7 to 12 knots depending on the altitude and power setting. When we later tested a RAM modified series III, 325 HP conversion, the temperatures were even hotter. ULTRAcooling is like carb heat in reverse where hot induction air is cooled as it’s routed through the Ultracooling System (like pushing the carb heat off) immediately restoring the engine’s lost power. All three sections of the design interact perfectly with one another for optimum thermodynamic efficiency. But to look at it, you see more of the 400 series than you do the pressurized 310. The Cessna 340 was originally equipped with two 285 hp turbocharged Continental TSIO-520-K fuel injected engines with three-bladed propellers. For example, with more power, you could safely carry more weight and also improve the takeoff and single engine performance.
Cessna, for example, lists a variety of combinations, up to a maximum of six people, but with greatly reduced fuel load and range.
On the east coast it's rarely advantageous to fly higher. The first deliveries of the Cessna 340 began in 1972. The 340 is an all metal, six-place, low wing, pressurized, twin engine airplane and is equipped with retractable tricycle landing gear. So in the standard configuration, the 340 can hold 163 gallons. Once in the civilian world, John made the leap to helicopters, going all the way through CFI-I in the unforgiving flight training environment presented by the mountains around Lake Tahoe. Entry into the Cessna 340 is like that of the Beechcraft Duke, via airstairs into a very roomy cabin. The optional auxiliary tanks are available in two sizes. The 340’s pressurization system maintains a differential of 4.2 psi. I owned a Ram VII 340 and flew it 1500 hours before I bought my 1980 421C. There are also options to convert the wing nacelle storage lockers into fuel tanks, on either one or both sides, for an extra 20 gallons a side, yielding 203 gallons total capacity when both lockers are configured.