FlightGlobal.com
Home
Premium
Archive
Video
Images
Forum
Atlas
Blogs
Jobs
Shop
RSS
Email Newsletters
You are in:
Home
Aviation History
1957
1957 - 0535.PDF
537 FLIGHT,26 April 1957 Above is the Lycoming T53 in an adapted HOK helicopter (prototype of the K-600-3). At right, the same aircraft demonstrates the use of its cargo hook. Rear clamshell doors ensure easy loading and unloading. America Buys Blackburn Turmos British Turbines for Kaman Helicopter TWO Blackburn Turmo 600 shaft turbines have been pro-cured by the Kaman Aircraft Corporation, of Bloomneld,Connecticut. In announcing this, the makers of the aircraft state that a version of their K-600 helicopter, adapted for theFranco-British powerplant and known as the K-600-4, is to be evaluated by the Canadian military Services. Coupling of theTurmos will be undertaken by Kaman. The K-600-4 is a straightforward adaptation of the K-600-3,powered with the Lycoming T53 gas turbine. The Lycorning version has already completed over 80 hours of operating time,including 50 hours of tethered testing and more than 30 hours in the air. Speeds higher than 115 kt and heights of over 5,000fthave been attained. Installation of the turbine in place of the Pratt and Whitney R-1340 piston engine has conferred greatlyincreased cabin area, higher performance and a wider range of applications without increase in overall dimensions. The makersstate that operation is simpler by virtue of a turbine governor, which automatically supplies the right amount of power asdemanded by the pilot through his pitch-stick setting and main- tains rotor r.p.m. at a constant, pre-selected speed. The standardHOK structure, rotor system and transmission system have been retained. Commenting on the acquisition of the new Blackburn enginesthe makers state: "The twin Turmo K-600-4 provides twin- engined operation, which in turn provides increase 1 operationalsafety and the unusual opportunity of operating cruise portions of flight on one engine, thereby substantially increasing ranges andendurance. The Turmo 600 gas turbine has completed its 150-hour Air Registration Board Certification tests in England and is a fullycertificated engine in quantity production. Two of the Turmo 600 engines are presently at Kaman Aircraft's Bloomfield, Connecti-cut, plant undergoing preliminary test and evaluation. Company officials believe that the twin Turmo-powered K-600-4 will beof great interest to the commercial helicopter operator. Analysis indicates the twin Turmo version will operate at a lower hourly operating rate than existing helicopters. Ton-mile and seat-milerates are expected to be lower. . . . Kaman Aircraft plans to undertake C.A.A. Certification of either the T53-powered versionor the twin Turmo version as commercial interest develops." KAMAN K-600-4 (Coupled Turmo 600) 2-seater Weights Useful Load (Ib) 1,800 Crew (Ib) (200) Passengers (Ib) (200) Cargo (Ib) ... ... ... ... ... — Fuel (Ib) (1.300) Misc. useful (Ib) (100) 3,955 5,755 960 1,810 15.200 18,000 1,350 1,986 23,200 101 106 (8,000ft) 177 200 92 80 2.47 3.52 43 43 Empty Weight (Ib) Gross Weight (Ib) Performance Vertical rate of climb (ft/min) at s.l.) < Absolute hovering ceiling (ft) •[ g '" Max. rate of climb (ft/min) at s.l. | g Service ceiling (100 ft/min)Speed at s.l. (kt) Speed at altitude (kt) Range (n.m.) at s.l. < Cruising speed (kt) Endurance (hr) at s.l. Cruising speed (kt) 5-seater 2,340 (200) (740) (1,300) (100) 3,955 6,295 460 1,36012.000 15.200 1.1301,670 20,60099.3 103 (6,000ft) 172 193 91 77 2.34 3.25 44 44 3,000 Ib cargo 3,770 aoo> 3,000 (470) (100) 3.955 7,725 140 4,000 600 960 12,70095 95 (s.l.) 6654 86 60 .7641.0 51 51 Note: For the purpose of the above assessment Kaman assume that the twin Turmo (normal rating 800 h.p.; military rating 900 h.p.) would have a normal power of 600 h.p. and a military power of 720 h.p. Under the "Perform- ance" heading A =600 h.p.; B=720 h.p.; C —two-engine operation; D = single- engine operation. Below is a view of the 753 oil-cooler installation, with fairing and oil-tank cover-panels removed. The coolers are mounted above the cabin, forward of the rotor pylons, immediately on the right is a view looking aft between the pylons, towards the powerp'.ant. The remaining view shows the "transmission adaptor," which provides the proper speed ratio between the T53 and the standard HOK-1 transmission.
Sign up to
Flight Digital Magazine
Flight Print Magazine
Airline Business Magazine
E-newsletters
RSS
Events
