Abstract: A micro air vehicle is propelled by a bipropellant micro engine supplied with hydrogen peroxide and a hydrocarbon fuel. The hydrogen peroxide is decomposed to produce steam and oxygen at high temperature and the hydrocarbon fuel is burnt within a combustion chamber with oxygen produced from such decomposition. Products of such decomposition and combustion are exited through a nozzle to produce thrust. In a preferred embodiment there is also a ducted turbofan located downstream of the nozzle exit.

Abstract: Liquid crystalline compounds useful in super twisted nematic liquid crystal displays are described and have the formula: wherein n is 1-5; m is 0-5; p is 0, 1 or 2; q is 0, 1 or 2 p+q is less than or equal to 3; A1, A2, A3 are independently chosen from 1,4-disubstituted benzene, 2,5-disubstituted pyrimidine, 1,5-disubstituted pyridine, 2,6-disubstituted naphthalene which may be laterally substituted with F, Cl, Br or CN, trans-1,4-disubstituted cyclohexane, 2,5-disubstituted dioxane, 2,5-disubstituted thiophene, 2,5-disubstituted furan, 2,5-disubstituted thiodiazole Z1 may be COO, OOC, OCH2, O; Z2, Z3 are independently chosen from a direct bond, COO, OOC, C2H4, CH2O, OCH2, C4H8, C3H6O, (E)—CH═CHC2H4, (E)—CH═CHCH2O, —C≡C—; R1 is alkyl, and may contain up to 20 carbon atoms and may be branched or a straight chain; provided that at least one of, A1, A2, A3 is selected from 1,4-disubstituted thiophene.