Untilted Project 1794 Report.pdf TH,s FILE IS MADE AVAILABLE THROUGH T HE DECLASSI FICATION EFFORTS AND RESEARC H OF TI-IB BLACK VAULT THE BLACK VAULT IS THE LARGEST ON LI NE FREEDOM OF IN FORMAT ION ACT /GOVERNMENT RECOR D CLEARING HO USE INTHE WOR L D. THE R ESEARC H EFFORTS HERE AR E RESPONSIBL E FOR T HE DEC L ASSI F1CAT ,ON O F T HOUSANDS OF DOCUMENTS THRO UG HO UT THE U .S. GOVERNMENT, AND ALL CAN BE DOWNLOADED BVVlS,T ING , HTTP ,1/WWW.BLACKVAULTCOM YOU ARE ENCOURAGED TO FORWARDTH,s DOC UM ENT TO YOUR FRIENDS, BUT PL EASE KEEP THIS ID ENTIFY,NG ,MAGE AT THE TOP OF THE .PDF SOOTHERS CAN DOWNLOAD MORE' http://www.blackvault.com/ Unciassified • INDEX ~ VTO Eff'ieiency Chart.. • • • • • • • • • • • • • • • • 1 Fio--~ Distribution - Hovering & Ground Cushion •••.•••••••••• Transition ••. . . .. . . .. 0 • • • • • • • • • • •• Forward Flight• • • • • • .. .. • • • • • .. • • • • • • • General Ar:irangement • • • • • • • • • • • • • • • . • • Cutaway G.. A.. • • • • •. • • • • • • • • • • • • • • o • In take A.rrangemen t.. . . . . . . . . . . . . . • . . . . Impeller & Turbine Assy •••••••••••••••• Fl.ame 'I!ube & Nozz.-l• • • • • • • • • • • o " • • • • • • Control Assy Arrangement •••.•.•.•.• o •••• Stabilizer System • • • • • • •. • • • • • • • • • • • • 1/6 Scale Mode-1 • • • • • • • • • • • • 0 0 ♦ • e .. •· Intake Model. • • • • • • • • • • • • • • . . • • • • • Supersonic Control Model •.•.•••••••.•.•• Ground Eff'ects Model. • • • • • • • • • • • • • • • • • A:VRO Wind Tunnel.. • • • 0 • • • • • • • • • • • • • • • Mission Profile ♦ 0 0 ♦ • • • • • • • • • • • • 0 • • • V-N Diagram. • • • • .. • • • • • o • • • • • • • • • • • Rate of Climb vs Al.ti tudle • • • • • • • • • ..... •· Time to Altitude ••••••••••• • • •••.••• 'l'blrus t-Drag Curv~ .. 0 ♦ 0 ♦ ♦ • • ♦ 0 • • • • • • • • • 'lhrust-Drag Curve • ••••••••••••• o A ••• Z&ro-Lift Drag Coet. vs Mach Nr • • • • • • • • • • • •. 'l'nruat vs Rim Speed - Cold.• ••• • o • • •• • o. • Tb.rust va Rim Speed -Hot •••••••• o • •••• • Unciassified 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 :u 22 23 24 25 Dedassifled on June 14, 2001 bytne ~r Force Declassification Office IAWE012958 Unclassified INDEX • • • • • • • • • • • • • • • • • Control Effectiveness. • • • • 0 • • • • • • • • • • • 27 Capture- Area Ratio. • o • ., o • • • • • • o • • • • • • 28 Ground Ef'f&ct Curv&s. • • 0 • • • • • • • • • • • • • • 29 Effect of Se.ale •• , •••• •. • • • • • • • • • • • 30 Eff'aat of' Contour • 0 • • • • • Effect of Noztle Pressure Ratio Effact of Nozz:le Aspect Ratio. Effect of' Nozzle Aepeet Ratio. e e e e O O e • • 0 e e • • • • • • • • • • • • • • • • • • • • • 0 • • • • • • • • • • • • • • 31 32 33 J4 Effect of Lo~aI J&t Blockag~o •• • ••••• , • • • • 35 Unclassified ..... w -, z - 3: 0 _, u. 01: -4 u w Vl ......_ a:i _, SECR£r DECLASSIFf ED 4, 0 0 0 -t---r......__--,-r-----,.--,,---,.--,,--,-,--,--,--.,---,---,--..,....._..,....-,.--,---,---,---,--....,......,.._ ·-1---+--+--+---1·-~ -1---l-----l---l---l-------1 --------- ~ ---- (1) CONVENTIONAL HELICOPTER +--+--+--f-----,~f-----,1--1 A P P R O X. 2 0 0 M. P. H. LI M I T r--1-+--t-+-----1 --+--+-t--t--t---+---+---+---+---+---+-l - FOUR METHODS OF OBTAINING - A NORMAL 12,000 LB. VERTICAL LIFT 3, 0 0 0 --..;.+---i---i---i---1-----J...-.1 ........... ~~~~~~--~----~---' ( NO GROUND EFFECT) 2,000 \ \ 1 (2) CONVERTAPLANE (TURBO - CONTRA-PROP) APPROX. 11----+--~\--+---+--+--+--4-~-5 0 0 M. P. H. LIM IT ---t-----t-----t---t---t--+-----t--+-----1 .,,/ - - 1 ( 3 ) DUCTED FAN RAMJET \ 2,000-2,500 M. P.H. OR LIMITED 1---1---+---1---+-\4----+----'---~ BY A E R O DY NAM I C H EAT I N G -----i-----t-----t-1--1--1 // _,..____...,_____.,,._..__,---+-1-1-1---,,.,-+--+--->-- -- - _,._,._,___,_,_ - '\~o // ----~___.\)G -+--+---+--+,.L--+---+-+-+---4---4---l~e-~~~~-+---t----1 ,__ - e-\)~o ' / t---+--+--+--+--+- ,_ -t--+--l---+--l--+-~ \ / l, 0 0 0 ......---t---+--+--+-~"\-+-/""?1--+--+--+---+--+--+~(-+4...,...) -+D- 1-+R-E-+C -T -lJ-E ~T -'--L~I F1--T-+--+---+----t f- - >- ,__ 1--K - ---t-- GAS TURBINE 1,500 M. P. H. t--+--+--+--+--+--+---'"4.-,--+-+--+---+--+-~ A ~ A B I L L PRO BAB LE --4-+----1 ' / / I CONSUMPTION IN GA L./ H R.+-+-+-~-=1--+-~ -=:::i~H~~R.:Oi:LC::;KF,ET - a.~s. - 1 6~o 1100 0 -4--.11.-...,__...,__-+-_.___..,__ ...... --t-....,_....,_--'---+--l.-ll."---i.' --+----i.----i.---------1------..._ ......... 25,000 30,000 0 5,000 10,000 15,000 20,000 V. T.O. EFFICIENCY CHART HORSE POWER ... -1 ........... _ : ~ ~ ~; 1 ~tf\ • ' I )i,, ·' f ' .+ 720-1794-1 f I \ ( - - SECREl DECLASSIFIED \_ \ \ ,' I .., FLOW DISTRIBUTION-HOVERING AND GROUND CUSHION ,.:,u: R t DECLASSIFIED .. - - - . - ... - .. -------------....:._--,-----~-------...i......i .... .-.~ REF + ... .... ... •· -· 7/.1.-17•1·1-1 - PILOT'S COCKPIT - - CONTROL OPERATING JACK CONTROL PUSH-PULL RODS ~~~ TURBINE STATOR •y-- "- ► I I EL TAN K s ~ ~ <: t,:~:._-_ WING DIFFUSER SECTION ~ ~ ~ <§> ~ HOVERING SHUTTERS CENTRIFUGAL IMPELLER lOl8°17q•· • RAMJET AIRCRAFT-DUCTED FAN ASSISTED bECLASS 1 IFIED ~ t- + + ~ ..L ♦ AVIUI AIA<'Jll'IFT ~,M,TFIII ...- I · oEGlASSIFlED ~t.CftEI;- ---.;;., IMPELLER -----·-- ,.....---· ---- / ---- '---- ,/ (\; "' I • . \ I . • ! 11 •.. \ ~ "' '\\ I \ \ " "-- .... ~ PROIICJ 1U 4 ~l ;~ ~\ / ./, ,J/\I; HINGED INTAKE DOORS . ~ \ VERTICAL CASCADE_,... ./ IMPELLER • ---- ------ I IOH-1794-l 1 NT AKE ARRANGEMENT .:S&CIFJ.... DECLASSIFIED., ·-- "--' -4♦ + + -+· ~ DECLASSIFIED ◄J-ltO _.,11c14,, ~1 i,1r10 < - ~ - - ~ • --... ,.-r-- - bnirii -i,aoncT 17t• REDUCTION GEAR FLANGED HOLES ---7o/-YTO PASS INLET AIR ROLLS ROYCE RB108 JET ENGi~ :~~- ~~ .·, TO RB108 ENGINES IMPELLER BLADING IOll-17•~- l -$- BLACK ~~ '\ I - I I • . 1 .. ..._ , --- - ·,, "'--.....:::::.===: -- (J t, I/ - ......... 'IT ... --~l u -~"""' ' . , '-~-... • ,-, I - c· ~-~- ✓ -<, ~ --- _/7 ---, I • . /.' [~\ - -____ / . .' ~'a,~TURBINE Vv y y y 1 I 1 J I 'J \I IMPELLER AND TURBINE ASSEMBLY ..ff'E!A&l DECLASSIFIED $ I I -+ ,,,VN() -"fUUN;'t,/ 1111.,IIIO I SHUTTERS RACK AND PINION DECLASSIFIED \) ~),? " ~ - ADJUSTABL'E NOZZLE ASSEMBLY ~ I UPPER '1~ uJ CONTROL LINKAGE PROl£CT 1794 OPERATING JACK FLAME TUBE CONTROL LINKAGE FLAME TUBE AND FINAL NOZZLE ASSEMBLY DECLASSIFIED ~ q -\- ......_, Cl Af'IIO ~u,rll-tF, Lllf./TID DECLASSIFIED ~SfCkt:=:f • FORWARD FLIGHT SHUTTERS CONTROL VALVE ASSEMBLY --~ - ---_/ .diJr ~ ~ --HOVER IN '- .. . , ·• /- ~~ . ___ .-,'~:. ··i;o/ ~-, " -~-- ~ ii ~ , - i ~-' ~-~g, /:. ) ----'"P:'Q~ C?~ ""-. . ·_. ""' )'' ·,~- ~ ' I \ '•~1 r ' ., t· // '~ ~i~ ,/ \•, I -~ ···.r· ·';,J ;;· \ (f; ·.-- -- --· -- ------ .,,,,,.. --- ~ --~---- ......... ..._ __ • ...____, - -- -- ., "-., ' ... , ' ·. IMPELLER ~.,,, ~,,r ~.hi, ~A !$>,,-? ~11111!_ - ..._ __ PROl■CT 1794 VALVE OPERATING JACK FOR HOVERING SHUTTERS OPERATING JACK FOR FORWARD FLIGHT SHUTTERS tu,n-ti'--t.t TYPICAL ARRANGEMENT OF CONTROL ASSEMBLY ...S.!EIU!T DECLASSIFIED ..... - B UNO llllf'P U I II IUIIO DECLASSIFIED :SECkl:[ RETURN --~ - - ----=- _.•oner 1794 HIGH SPEED l DIAPHRAGM t T SPRING ~, ~t ....:__,,~--, ±:==i,-,.-,, OPERATING JACK CONTROL VALVE CONTROL SHUTTERS \ RETURN -=-~7'!: . , ,, ~~ l~ELLER CONTROL SHUTTERS ,4'/7 ►.~~E J ~ ~ - :z~ 10.!~ : ~;i4. c=:::::c:.:::~_::-~_-_-_-_-_ -_-....... - Tu RB IN E SCHEMATIC DIAGRAM OF STABILIZER SYSTEM SIGREl DECLASSIFIED ',.. ·::,; o/l CJ m ("') i en --n -m CJ .:. 0-... z VI I\ ,. ... Ill VI I C V, VI 0 z -I\ 3 0 a Ill ... C---1 CJ m a s; er. er. -"'T -rr C: 0 m I (j ~ en - I ,, -m 0 -z ... ,. ,ii: Ill s 0 a Ill .. I , \ \ ' ' \ \ I I \ \ \ ' ' \ \ ,., I . ' __ __, 0 m Q i -:a .m CJ fl -$-~ 0 ,m n I s;: en en -:!J m CJ : ; "' C .. Ill • "' 0 z -tA ft - iff ft • £ 0 ~= \ 0 -.. -.• ~~ ~ 0 a ~ Ill .,,, .. __ , 1--~ t / 1--ef? --r'4?' ; - ~;c - __ - -\ ~ : ~ • • ~ ~ ~ ~ ~ ~ • ~sECHE-f DECLASSIFIED FECTS MODEL - ~'!!>,Jl~~ D ttcLASSIFIED = - -:r • - SECRc .. m 0 -.... '1 -r ◄ lltO 4/Rt'Jtl,I l l l-llTID L- J ABOVE HEIGHT SEA LE VEL-FT. --;- 80,000 _ _j___ 70,000 I I 60,000 I 50 ,000 I r- 40,000 ' I I . - ; : / ii- - I 1/ : -- --L I :, I -~, """ u I I I - --. - I I ' I I I ; I I I ·- I I ' I I I - ~, - I DECLASSIFIED SECRCJ, I I I 7 ~ -- I CRUISE AT M=2.0 I ' . ·- >--- -- ~- - --!-- ! I I I I ' ' I I I I I I I FUEL CAPACITY = 10,000 LB RESERVE FUEL = 950 LB ' I - . - I I I I I I 7- I I - -,~ I I I 30,000 Fi . I ,___ II') I I---- I ~ ACCELERATE TO M =2.0 I ~ . 20,000 10,000 I // J I I I ---:, I I ! I I ' -CQ, I i-- I I I -~, I : -9 I I NAUTICAL MILES I ..__ ·r3oo I - -/ 1 • 100 I 200 400 I I I I 0 0 100 200 300 400 500 RANGE-STATUTE MILES 10!- -1;q4.1 I - -· - ' I -- u_ ' I ' I ,-l \ I j ' ' . \ I • ' ' - ' I ' • I 1--- ~ - -- 500 I 600 4 RB 108 DUCTED FAN-RAMJET AIRCRAFT STILL AIR RANGE J!~H'- DECLASSIFIED __ .. ___ PROJECT 1794 ~- L-I - - I I I - - I I I l I -+-,-- - - _,._ ' I I I I I i l ! I i \- I \ 1 I \ ' ' \ . ' . \ 600 700 I ¾ 1 AVIII AIICIAFT 1.IMITLII - :r.1 ASSIFIED ~Jili;jJ 7 6 5 4 3 2 0 -1 -2 -3 992-1794-1 I I 7.33 I , / ) , ~ / NORMAL ACCELERATION / t~ _i.,...- r- G·, / ♦ / ' DIFFERENTIAL JETS /" l/ \ '\:i .. ~ ,,,, TRIM LIMITATION WITH DUCTED FAN ENGINE ~ :I USING _ RAM AIR AND CAMBER TO PRODUCE l'::.-' _,,,.. ....... .1 ' I I I CL= .15 J .2 I .3 .4 .5 .6 .7 .8 I j MACH NUMBER ,._ ........ _ ' r,... ""'- , .... r-,..... -3 FLIGHT ENVELOPE OF DUCTED FAN AIRCRAFT USING RAM AIR AT SEA LEVEL --s:£aH DECLASSIFIED _.__ J_ ~ l'■OIICT 179• .9 1.1 ,0 I ALTITU ABOVE LEVEL/F 100,000 90,000 80,000 70,000 60,000 50,000 40,000 DECLASSIFIED ,-ROJICT 179-4 DE SEA - EET - - - - - -- - - - . - - ~1 - - J' - - - - - - - ' - . - -:--- - - - - . - ' I- '- ,_ \i\ " " --- ~ \}~~ t\. 1,M~X. RATE OF CLIMB - ~ ... ? - - - -- - - - -- iY .. - - -~ - \ '\ _[L ~ ~ - -- ~ - - - - - ~K - b, -- --- --" ,_ ·'-C--I- - -\ ~~, ,, __ - -- - '~ 700°F ~ 2240°F M.=2.8 \M.=2.5 ,~ - - -- - - - - ~ ' - 1', - I-- ~ I-- I'... _ - - - ,_ - ..... ' , ..... ...., -- - ', - -............. - - _ , - ~ ......... ...._ - - ' - · - - - - - - - -.... ......... ....... ........ ....._ ...... 2240°F - - -~ - '- - - M.=2.0- I- r---. ... ,_ - - - -r---. .... - -- - - -- -- - - - -r---.. r---.. ~ ... - - - - - - - -- ""1700°F - I- 1-- - ~ - - - - - - - - - - ·-~ - ,- -- --~ , - -- ~ -- M.=2.0- I- I I I - - - - - 30,0000 20,000 40,000 60,000 80,000 100,000 120,000 RATE OF CLIMB/FEET PER MINUTE 4 RB 108 DUCTED FAN RAMJET AIRCRAFT RATE OF CLIMB VS ALTITUDE DECLASSIFIED _I \ ~ I .. fVRO ,.,.,,<.,,.,,., 1.1•11rrn DECLASSIFIED -.sre I ,:8: -i- P a O JlCT 179-1 HEIGHT SEA ~ -l 1 , ~ 7 LJ I ' LJ_ I I 'H--~---Lf---l--, ' I - ' W- 1-{ I • t--+-' ~ ~ , ' H , • ABOV 1 E i I µ=H-' ' 1-l-, ' µ_ ' ' --~ ' l LEVEci=H-LL ' ' ' j ~ - · · . IN 90,000 FEETJ , , • J ~ J , _ •= 1700 f _ , LL r • 1 1 ~ ..j -l ' l j , ,!'.'.: I-+- J j e,::t:: --J-- ' j 80,000 70,000 60,000 50,000 40,000 30,000 20,000 10,000 ' j +H- J. ' t'.:j J ' ' J J I, i-f-f--L, -/ f---:-• a ~ j ~ _j ➔ _j , , J J t l . < 1, j j_LJ j ' ' I ,"· j J _j • ➔ ; J l l l J I J J..l l J J J 4 '· J f--LH--- J J Ll r+-- __J_ +-- I I l.-J_ 'J J. ~ l J l. 4 '· , I J J l J a j j I J , , j ~ J ' ' J j • J ' ' J , .., -i 1' j J J J ' ' 1 l J ' , , ; ' ~ < 'f- J ' ' , J J j < • l •• J J J ,-L, : -l H _, . J .: , ' j j • l , l --l J j • J j j ' , J I - J ' J . . J . J • ~ l J ~ . J J.L j ' J , j ., , , , ~ - .J ~ ~ l ~ ··• -1794-1 ~ I - • _. .J 0 1.0 2. 0 3.0 TIME TO HEIGHT FROM HOVERING IN MINUTES 4 RB 108 DUCTED FAN RAMJET AIRCRAFT TIME TO HEIGHT AND M =2.0 FROM HOVERING AT SEA LEVEL 41CIUT DECLASSIFIED 4.0 + ' _j 7 THRUST AND DRAG LB. 80,000 70,000 60,000 50,000 40,000 30,000 20,000 10,000 \ , \ "'-.. 7 / • J '/ 1/ .! 7 / DECLASSIFIED ...:S£eREl .. -, ' -I ',• J ! l j I I ' I I I I , ~ / I j :,..--~ I . 'I' / I / / 1, / j / , I - j / . 1....1 PROIICT 1794 _.,- -...._ / I , I j I j j / MAX. THRUST. 2240°F I I j I / ......... ~' ' , \ ~ I /MAX. THRUST 1700°F-~ , ,.;r / _.,-, ., ;r ,,,,,,,,. DRAG ~ __. ,,,, 0 0 1.0 2 .0 3.0 FLIGHT MACH NO. 996-1794• l THRUST AND DRAG VS. M. l'.T 36,000 FT. DECLASSIFIED L r DECLASSIFIED -SECRE'lfr ,aa ~ .... .,..._ ST AND THRU DRAG 9000 8000 7000 6000 5000 4000 3000 2000 1000 0 LB. 1-- - - - - -·I- - - - ,- - - i---- - / ....... ,/ / - MAX. THRUST 2240°/ / / /,, MAX. THRUST , - ~ 1700°F ~ 1.....-- .....,1 .._ V ..,,, ,,, ' I/ / "\. J- V --- ,I_ DRAG - --/ t::. ~-' ' / , / /, - - 1-- INDICATED AIRSPEED - KNOTS 112 217 33 0 0 1.0 2.0 3.0 FLIGHT MACH NO. THRUST AND DRAG VS. M. AT 80,000 FT. THRUST AND DRAG LB. H11T1H11111H1--t"11111111111- H111--±::_*~~:j 6 0 0 0 t--t--+-+--+--+--t--+--+-+--+-+-~ MA X. TH R U ST 2 2 4 ~;(-,AC-,--+--+--+----+-,...~ / I 5000 V MAX. THRUST-- 1---1---+-+--+-+---jf--+--+--+-~+--1---1---1--1"'--,---f~--+---+--+-~+V·~· F--+-4--rj 1 7 o - FFICIENT .03 ,- -- >->-- ,_ --I- '- - ,_ - - . 02 .01 ,- 0 0 1000-17'14-I >- -- DECLASSIFIED SECRET ,_ -f-- '-- f--I- - - >- I/ ~,. I-1-- . 1-- j \ ,_ 1-- I \ -- -- \ I ' /- \ \ , '-,__ '- \ --'- - -- - - - ,_ - - -- \. '\ - I- ~ - '- ... ._ "'I'--... ........ ~ J I I i) - --- - I- - - - _,_ .__ - - - . - __ ,_ - I- I-,__ I-~ I-,__ - 1.0 2.0 FLIGHT MACH NUMBER DUCTED FAN RAMJET AIRCRAFT ZERO-LIFT DRAG COEFFICENT VS. FLIGHT MACH NUMBER DECLASSIFIED ~ROUCT 1794 L---- • . - - - ........ ~ """"i""--. - ~ - I--+- 3.0 OECI ASSIFIED ~ fl A/0 111./tJ.• II I 111-111111 PROllCT 1794 20,000 ..-------,------.---~---~------- GROSS THRUST LB. 15,000 V) - c.: u..: "' - N '-,,__ _ _ __ __.. __ V") .......__ __ .._,,. ___ ..._____. r-.... C0 I/") 0 • UJ UJ --- -- -- ---- --· --- - a. - - 1,/') ~ - - - ·- - -- - - - . - ::, -- ·-· - -- - -- - - - c.:: cc ....I ::, -·-- - - - 25 ,000 ---------1----1--- 0+------'----+-------1 UJ -+-- _ _.L - -- ----- --- 1-------+------+---- 2 0 I O O O '------'--------'-------____. __ ___._ __ ____.._ __ ___.____, 400 450 SOO 550 600 650 700 RIM SPEED IN F. P. S. STATIC THRUST VS. RIM SPEED (COMBUSTION TO 12OO°K IN SECONDARY FLOW) cSttfHJ DECLASSIFIED ,{ .~ n 71 7 _ 1 4 ::>--19 ,.:),_") _J 991-179i-l 7 .8 t- z u.i u - .7 u. u. u.i 0 u t- ~ .6 _, Q z < u; .5 ... z u.i u ::t .4 u.i 0 u t V) ~ .3 :c t- ..... 0 a.:: t- .2 z 0 u t- 1,M -, . 1 0 \ \ ~ DECLASSIFIED ~€8:Ei- I I ... MAXIMUM USABLE CL WITH DIFFERENTIAL \ CONTROL JETS AND CAMBER TO PRODUCE \ CL,= 0.15 ~ \ \. ' .. " .. ..,_, .... ' r-,... ..... -~ - CL IN LEVEL FLIGHT AT SEA LEVEL _./ AND WING LOADING= 20LB./ SQ. FT. l ' .,...CJ OF COLD DUCTED FAN l / c/" ENGINE AT SEA LEVEL ./~ ~ \ \ ' ' '\:: \ ~ ' \. ...... ~ .. ...-... ....... r-~ - 0 .1 .2 .3 .4 .5 .6 .7 .8 .9 1.0 1.1 1.2 MACH NO. LIFT AND THRUST CHARACTERISTICS OF DUCTED FAN AIRCRAFT AT SEA LEVEL S&C RF I .... DECLASSIFIED L r ·- J. . -t . ' LIFT CO-EFFIC Cl 1.60 1.40 1.20 1.00 .80 .60 .40 .20 0 IENT '-. - >-- j 0 j I/ j I I 0 993-17'4-I ~ DECLASSIFIED '7 __ / j I/ i j , ~8 Ii ) , ~ - - -- ,_.•-;. COMPARISON ·oF GROUND EFFECT CURVES :iECktl DECLASSIFIED g1 f- AV•• Al•<•A,r l/Mlrr• DECLASSIFIED :&- E-:=e- R-E; --1j ) . L r, PROIICT 179• .- LI FT RE:~rtNI 1 1 1 1 1 1 1 1 1 1 111 1 111 1 1 1 1 ( ~O~N~ 10 ~~~~S)'1 1 1 1 1 1 1 2.2 2.0 1.8 1.6 1.4 1.2 1.0 .8 .6 .4 .2 00 980-1794-1 + )!,,I~ ~ 0 20 l ' ,0 1-11 \I~ I I .1 l Lc=} -~ ~-, -, ~ I t.-, I ~ ' \ ,-rr TI \1' ~ '"'(~ ~~- """ .1 .2 .3 .4 .5 .6 .7 .8 .9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 , HEIGHT ABOVE GROUND (AIRCRAFT SPANS) EFFECT OF SCALE $!CR! 1--' DECLASSIFIED 4 w - -t ,u,•• ,.,,,, .,,,,Er ,,11~1rc• l IFTI - J REAC 2.4 2.2 2.0 1.8 1.6 1.4 1.2 1.0 .8 .6 .4 .2 0 ET I TION ~ \ .\ 't\ 1\.j ,\ \1 \ Kt.. ,L- \~ i \ ~¼\ .I \ ~-~~ " \ I~ l ·1 ... h . ..J.~· ,_ ~ ,\ . DECLASSIFIED ~~ POINT CONTOUR X 0 -□ -·-A • )1( ' \ ~ . ) \ ,_ ~t . '{·s9'N ~ -~ - l ... ..... _ ~ - ~ - - 0 .1 .2 .3 .4 .5 .6 .7 .8 .9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 HEIGHT ABOVE GROUND (AIRCRAFT SPANS) 983-1794 -1 EFFECT OF LOWER SURFACE CONTOUR ~El DECLASSIFIED ) ~ .i- ••onu 17f4 ' A Vllt, A IIIICIIA,r LIM ITLO L J I IFT h1-- REAC TION- POINT DECLASSIFIED areRU X 0 [J HEIGHT ABOVE f'aOIICY 1794 8. [:J ◊ ~ (J ® ~ - - - 3.0 2.8 2.6 2.4 2.2 2.0 GROUND .10 .15 .20 .30 .40 .45 .50 .55 .60 .80 - 1.8 1.6. 1.4 1.2 1.0 .8 .6 .4 .2 0 1.0 . , r.\,. r:,.. I• V <.:i l,o,. l'(...._ I ---+- I I ! ·- I r---...... I r I I I I ~ I I I_ I I - I ... I I -.......... ... I I I I I I I ......... x I I - I I I I ! I I I I • ~ I I I j ...... ' I ~ r-:- I I I I J... ._ ---- I I , ---.. -.......'.._ _ ~ -- I I ~ ~ ,__ r--. r---,..... I l I ~ I I I rfl ..... I --~ -:--- I ,, - ,,, , . - -~ · --V -- ·- - I ,---~ ~ ... I --r-. ---- I ' j ' ' :,,- I -I ..-, ------~ I I -:, -- . , ,..... ;::., ,, ! " - I 'c::t: ' I I I I I I I 4 0 0 6 0 0 8 0 0 10 0 0 12 0 0 14 0 0 160 0 1800 JET ASPECT RATIO (CIRCUMFERENCE/ WIDTH ) EFFECT OF NOZZLE ASPECT RATIO ~ DECLASSIFIED w V\ LIFT • l T -- I JET : 1 1 REAC!l_()!i_ I I\ • l l DECLASSIFIED ~fl. l ~ I j X O ALL JET l ~ -PROJ(CT 1794 l -20rT\! ' I l. 8 I ! I j 1.b • I i I 0 I 0 /. " ' I I 1 1 20 ~ I I I 1.4 i l ( _) -+ ~-l.._W~-+--+---t----t----t-1T1 6 · , ~ I ' . 1,2 I ......... 60 D ( ' ~ ,.{o" n I ;' I LG I I I ◊ ( _) lo \./ .B ' : 'ii ('· .) • . I I I I ' .6L~J~-++-~____;__+--+: Nl-ti[-:l~i "-\. 100 I l I .4 2 1 I I i I I I I ' I I I : I I I I I I 11 I ! I !i ! ,,. . 1 .2 .3 .4 .5 .6 .7 .8 .9 l.0 1.1 l.2 1.3 1.4 1.5 1.6 HEIGHT ABOVE GROUND ( AIRCRAFT SPANS ) ,,,.1 I '1◄ t EFFECT OF LOCAL JET BLOCKAGE H,C-A,,W- DECLASSIFIED •

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