. ▁Mac don ald ▁and ▁Jane ' s ▁Publish ers , ▁ 1 9 7 5 . ▁. ▁ ▁External ▁links ▁▁ ▁Text ▁of ▁Oper ational ▁Re quire ment ▁ 3 0 1 ▁Ro cket ▁intercept ors ▁and ▁S 1 7 7 ▁British ▁A ircraft ▁Directory ▁Un real ▁A ircraft ▁Text ▁of ▁official ▁history ▁of ▁SR . 5 3 ▁project ▁ ▁Category : 1 9 5 0 s ▁British ▁f ighter ▁aircraft ▁Category : M ixed - power ▁aircraft ▁Category : R ocket - power ed ▁aircraft ▁SR . 0 5 3 ▁Category : Cancel led ▁military ▁aircraft ▁projects ▁of ▁the ▁United ▁Kingdom ▁Category : M id - wing ▁aircraft ▁Category : A ircraft ▁first ▁flow n ▁in ▁ 1 9 5 7 <0x0A> </s> ▁Grand ▁Det our ▁is ▁an ▁un in cor por ated ▁census - design ated ▁place ▁in ▁O gle ▁County , ▁Illinois , ▁United ▁States . ▁As ▁of ▁the ▁ 2 0 1 0 ▁census , ▁its ▁population ▁was ▁ 4 2 9 . ▁The ▁village ▁is ▁named ▁after ▁an ▁odd ▁turn ▁in ▁the ▁Rock ▁River , ▁which ▁flows ▁north ▁past ▁the ▁village , ▁rather ▁than ▁its ▁normal ▁south western ▁course . ▁John ▁De ere ▁invent ed ▁the ▁steel ▁p low ▁in ▁Grand ▁Det our , ▁and ▁the ▁John ▁De ere ▁House ▁and ▁Sh op ▁is ▁a ▁U . S . ▁National ▁Historic ▁Land mark . ▁ ▁History ▁ ▁Grand ▁Det our ▁was ▁founded ▁in ▁ 1 8 3 5 ▁by ▁Leonard ▁And rus ▁( 1 8 0 5