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Aviation History
1959
1959 - 1772.PDF
14 AUGUST 1959 FLIGHT The TEST RESULTS that placed Imer Fluoroflex on the COMET Palmer Fluoroflex, designed to give at least 5,000 hours service life, saves up to 20% on conventional rubber pipe weight. No limiting "shelf life" in storage. Fluoroflex (P.T.F.E.)Flexible Pipes are being fitted to the Comet IVBfor British European Airways. Palmer Fluoroflex Flexible Pipes have successfully withstood the following rigorous tests: TEST 1 (a) Simultaneous Impulse and Vibration. Pipe sizes —4 (&" bore), —6 (-&* bore) and —8 (A" bore). IMPULSE: 600,000 cycles at 100 cycles/min. to peak pressure of 3,800 p.s.i. Rate of pressure increase 126,500 p.s.i. per sec. VIBRATION: Amplitude ± .005" at 7,500 cpmfrequency. TEMPERATURE: 120°C. internal and ambient. (b) Continuation of test for 900 hours at static pressureof 3,000 p.s.i. and normal ambient and internal tem- perature. TEST 2 (a) Simultaneous Impulse, Vibration and Flexing , - Pipe sizes —4 (&" bore) and —6 fe" bore). Impulse as in Test 1. VIBRATION: Amplitude ± .020" at 3,000 cpm. frequency. FLEXING: 4" for 20,000 cycles and 9" for 40,000 cycles. TEMPERATURE: Normal for 99 hours, — 55°C. for 8 hours. (b) Continuation of test for 900 hours at static pressureof 3,000 p.s.i., normal internal and ambient tempera- tures and without flexing.The above tests each correspond to 10,000 hours factored life on the hydraulic system of the De Havilland Comet IVB. mer Palmer Aero Products Lid PENFOLD ST. LONDON N . W. 8 AERO PRODUCTS DIVISION • BTR INDUSTRIES LIMITED 6/2929
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