Schweizer has won FAA certification for an increased takeoff horsepower rating on its Model 333. The maximum five-minute takeoff power limit is now raised from 252 shp to 280 shp.
The boost to the Rolls-Royce 250-C20W turboshaft is said to “significantly” increase the 333’s hover capacity, as well as its takeoff and rate-of-climb performance. The hover-out-of-ground effect ceiling increases by as much as 6,000 feet due to the change. The power increase, coupled with the de-rated engine installation on the 333, also provides “exceptional performance,” claimed Schweizer, especially in high-gross-weight operations in hot-and-high environments.
The new takeoff limit is available as an option on new 333s. Schweizer is also developing modification kits, which, depending on the airframe’s serial number, will enable older 333s to be upgraded.