refann.adj.
/ˈriːfan/, /rᵻˈfan/, U.S. /ˈriˌfæn/, /riˈfæn/ Aeronautics.
A. n.
The fitting of a turbofan engine with a new and quieter fan; refanning. Also: a refanned engine. rare.
ΘΚΠ
society > travel > air or space travel > a means of conveyance through the air > aeroplane > parts of aircraft > means of propulsion > [noun] > aircraft engine > jet engine > types of
jet turbine1878
athodyd1945
turbojet1945
turboprop1945
propjet1946
turbopropeller1947
turboramjet1948
turbofan1949
jato1951
fan-jet1963
scramjet1966
refan1973
1973 Departm. Transportation & Related Agencies Appropriations for 1974 (Hearings before U.S. House Appropriations Comm., 93rd Congr., 1st Sess.) III. 1130 NASA has undertaken the development of an engine modification development program, known as the refan, or new-front-fan, as an alternate noise reduction option for existing aircraft.
1978 Flight Internat. 18 Feb. 428/2 The principal advantage of refans (whether cropped or sized up) over new engines can be summarized as lower development, acquisition and ownership costs; [etc.].
1978 Jrnl. Environment Econ. & Managem. 5 337 The retrofit options have undergone various degrees of operational testing, with refan the more uncertain at this point.
B. adj. (attributive).
1. Of a turbofan engine: fitted with a new and typically quieter fan; = refanned adj. at refan v.2 Derivatives.
ΘΚΠ
society > occupation and work > equipment > machine > machines which impart power > turbine > [adjective] > types of
radial-flow1881
axial flow1889
mixed-pressure1909
mixed flow1958
refan1973
1973 J. T. Callaghan et al. (title) Effects of cruise drag of installing refan-engine nacelles on McDonnell-Douglas DC-9.
1974 Internat. Aerospace Abstr. 14 2236/1 This would be accomplished by retrofitting the existing fleet with quieter refan engines and new acoustically treated nacelles.
1991 Technol. Transfer in U.S. Aeronaut. 45 Boeing faced a choice between trying to upgrade the 727 with the refan JT8D engine or re-engining the 737 with the CFM-56 high bypass engine.
2. Of or relating to the action or process of fitting a turbofan engine with a new fan; cf. refanning n. at refan v.2 Derivatives.
ΚΠ
1973 J. T. Callaghan et al. Effects Cruise Drag Installing Refan-engines McDonnell-Douglas DC-9 ii. 4 With the refan installation there is more channel area convergence and divergence.
1974 News/Jrnl. (Chicago) 16 Oct. 4/3 Another drawback, beside the added cost, is the fact that refan technology would not be ready until 1981.
1975 Internat. Aerospace Abstr. 15 2764/2 The objective of the refan program is to demonstrate the technical feasibility of substantially reducing the noise levels of existing JT8D powered aircraft.
1991 Technol. Transfer in U.S. Aeronaut. 45 The second contract was between NASA and the McDonnell Douglas Corporation... The contract, for $7.8 million, was part of Phase II of the JT8D refan project.
This entry has been updated (OED Third Edition, September 2009; most recently modified version published online March 2022).
refanv.1
/riːˈfan/, U.S. /riˈfæn/ transitive. Chiefly in figurative contexts (with reference to emotion, ideology, etc.): to fan (flames or a fire) again or further.
ΘΚΠ
the mind > emotion > passion > ardour or fervour > ardent or fervent [verb (transitive)] > heighten intensity of passion > again
refana1618
a1618 J. Sylvester tr. G. Fracastoro Maidens Blush (1620) sig. B3v They..almost staid withall His Brethren's rage; till Ruth-lesse Issachar Re-fand the fire.
a1653 Z. Boyd Zion's Flowers (1855) 98 His dev'lish thoughts did still refane the fire.
1838 Young Lady's Mag. 1 367 The flame was re-fanned by the intelligence that his father had missed five notes of ten pounds each from the parcels of money.
1862 T. B. Read in Poet. Wks. (1883) 283 Esther's heart, though still her sire..Saw Hope re-fan her smouldering fire Within the cloud's desponding damp.
1923 Times 5 Nov. 15/3 He did something to refan the flame of fellowship which burned so brightly then, but which subsequently grew dim.
1999 Amer. Jewish Hist. (Nexis) 1 Dec. 343 An overall postwar fear of refanning the flames of Nazism.
This entry has been updated (OED Third Edition, September 2009; most recently modified version published online March 2022).
refanv.2
/ˌriːˈfan/, U.S. /riˈfæn/ Aeronautics.
transitive. To fit (a turbofan engine) with a new and typically quieter fan; to fit the engines of (an aircraft) with new fans.
ΘΚΠ
society > travel > air or space travel > a means of conveyance through the air > construction and servicing aircraft or spacecraft > construct and service aircraft or spacecraft [verb (transitive)] > fit engine with new fan
refan1972
1972 Aviation Week 14 Feb. 52/2 Boeing and Pratt & Whitney are proposing..a demonstrator program for refanning either the JT3D or the JT8D..as part of the government's quiet engine studies.
1975 Times Lit. Suppl. 21 Mar. 318/3 Improved engine design has produced a new generation of quieter aircraft, earlier and noisier types can be refanned and further progress in the direction of peace and quiet may be expected.
2004 Flight Internat. (Nexis) 12 Oct. 6 We are not ruling out refanning 7E7 engines.
Derivatives
reˈfanned adj.
ΚΠ
1973 NASA Authorization for Fiscal Year 1974 (Hearing before U.S. Senate Aeronaut. & Space Sci. Comm.) 1247 Recent wind tunnel tests at the NASA Ames Research Center have shown that the refanned engines do not result in unfavorable aerodynamic effects.
2004 Flight Internat. (Nexis) 12 Oct. 6 The main contenders are still believed to be GE and Rolls-Royce, both of which are studying refanned 7E7 engine variants.
reˈfanning n.
ΚΠ
1973 Oversight Hearing on Noise Control Act (Hearing before U.S. Senate Commerce Comm.) 109 The costs are relatively not too high for a retrofit, but they are extremely high for refanning.
1975 Valley Independent (Monessan, Pa.) 11 Mar. 6/1 Though refanning would be cheaper, it does not promise to be entirely satisfactory.
This entry has been updated (OED Third Edition, September 2009; most recently modified version published online March 2022).
<
n.adj.1973v.1a1618v.21972