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A test progrclm I U~S cnrried out to er~nluate several new hightempclnt~or frictio,~ innterials . for rrse iiz aircrcji disk brnkes. A .s/)ecinlly built tcst nppnrcrtrts ~rtilizing n disk brake nizd wheel Irolf fro111 a sinnll jet crircrr~fl 7uns wed. Tile nppcrc~tzts eiarrbled control c!f'hrcrke presslcre, velocity clnd braking time. Tests ruere rlcn under Do/// cot~strrnt n)a(l u(~ric~hle uelocity coi~ditions and covered n kinetic r n e r g range sintilr~r to that encoz~iztered in crircrgft broke seruice. The atntei-ials euol~tnlioia shozucd tllnt triro iaeruly deueloped,/riction n~r~lo-iols shoru potelatin1 for zcse in ~i r c r c f i d i~k brakes. One of t/1r nt(ileri(ds i . s rr nickel-b(iksed sinlered corn/)vsite, ruhile tile other isn ~rro~bdei~~ri~r-b(w'e(1 lnaterinl. Both ,nnterinls .slroru mtrclz lorocr roeor rnte.s tirt~tr coiaueiatio~znl copper-Dosed mntericr1.s rind are better oblr to ruill~.slot~d tire high te~nperatures eizcoza~tered drcring bwkh g . Adrlitioi~rrl nzalrrirrls improveme,~t is izecessnly, however, sinct bo/k 17~nterirrl.s slroru (1. sig?zficn?zt tzegr~tiue slope of the ,frictionu~lvcity ccove nt lo70 uelocities.

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