l Jet Boost TJ,.. t .:--. " '"i ·, 1,.,,-klt,·c·d l':!V-7 'lc·p11111,· j..;, oru• of tli t• f1·w u 1.wra1io11al .i irt·r.aft in .-.•rvic·c wl1id1 ha v,• j,•1 h,►1,,.1,·r, (,1•c pod nn(lt·r n(~:.tr win~) as OJllional 4•q11i1>n1Pnt. By 6ROfJI" C,IPT Ali'V II. R. FOOTTIT "No.thing is e v e 1· goorl. enough." Admiral D eWitt C. Ramsey, President, Airci'llft lndu...-;t r ies Associatio?1 TH E REICH C hancclkry was a ; utted ruin. Black smoke streaks stained the white marble where the bombs had taken their toll. This had been Hitler's Berlin headquarters until Allied bombers had driYen him out. Now, in mid-January, 1945, he retired with his staff to his under ground .. bunker"', where he was safe from this death from the air. In the meantime, vVorld War II dragged on. Staff officers still came and wen t from the Fuehrer"s den . O rders still flashed to the N azi Army, Navy and Ai r Force. But in spite of the Reich Chancellery, a glaring example of strategic air power on his verv doorstep, Hitler nen:r de manded a . bomber force. [n fact. he went to his tipulation : ' 'Effective im mediately, the procedure on application f.or the registration as a comm ercial ai rcraft oi any aircraft having a maximum allowblc gross weight in excess of 12500 p (iunds will he altered so as to require the fu ll disclosure of all agreements between ,the Yendor and the purchaser and of all encumbr:inces in any case- where ~he aircraft h as been purchased from a person not qualified to be the o\\"ncr of a Can ad ian aircraft.'' R-R' s Last Piston Rolls-Royce ·s Dcrhy works h:is built and deli \·ered its last piston aero engine , :1 Griffon io r a Shackleton of thc South .-\frican Air F orce. Since December, I 91 'i. the company has turned out 'i 1.169 piston engines. JET BOOST ( Co111in11cd /mm page , O i in Yariation in maxi1num thrust . This condition. o f course. can he r,llcred for by select ing engines. before installation. that deli\'cr approximately the same th rust. But th is is usually undesirable from the logistics and main trna 11 cc \·iewpoints. A better solution, is the "'black box·• approach of synchron i7.t:d throttle motors. These may he re qui red in any case so that the boosters are open ed up in unison on take-oft. Stop and Go: Just how the boosters are controlled depends 011 the design definit ion and the aircraft arrangement. for example. a takc-ofT booster ma\' be designed \vith set controls that ~,nly allow full throttle operation of the jct e ngines. \Vith these engines far out on the wing, there may be detectors in the tail pipes so that if one engine fa ils, both boosters are automatica lly shut dow n. \ ,\T ith this type· of control there are cnginl" O\Trhaul aspects. too. \Vt: get used to thi11king of jet engines with :tll ()\"t:rh :ml lire of. s:,y. ,(ll l hours. But thi, i, based 011 runn ing the engine at -. :iriou, throttle s<·tt in_c:, th r<111 _t; !t ,,1 11 i1, lifetime. If the jet booster is rigged as a jct assis: for maximum ,thru~t only. then it may run a mere tenth of this time. or in this case 30 hours, before it must he pu lkd out and shipped hack tn l he m ·erhaul shops. From all these factors. then. the deci sion lo insta ll jet bonst<"rs on a Ragging airplane. to pick up it s performance for a particula r operation. is not a quick and easy one. U n fortunately. we in the :1ircra ft husiness are often faced with such decisions. since development 1110\-es at such a pace we must always st riYc to impro\'e w hat we haYe, or be faced wi th the expensi\·e joh of re placement due to obsolescence. As Ad m iral Ramsey told the , 1ational Security Commission of the Amer ican Legion a few months ago. "\Ve cannot freeze a nything and build it in large quant ities. J\.' othing is standard. Noth ing is n·er good enough. EYcn before a plane. or an engine. or component is placed in production, its huiklers ha\'e begun their ceaseless efforts to impro\"e it ... " But \\"hen we art· faced with impro\' ing agjng aircraft designs b y adding jet boosters, l can only u nderl ine the cau tioning words of A. i'vl. Scott of Rolls Royce of C;1nada. when he says. " Jn general I feel that there will certa inly he applications for booster engines in cxccptio11al cirrnm.,tance.,, hut they will not be in wide use either in the com mercial or milita ry field.'" HYPERSTEREO ( Cou1i1111cd /rum pagr 5)) tors. etc.. and may he used to inst ruct woods ioremcn and field operators. lndustn h:is sometimes m:1dc u se of mndels. \\"hen measurements arc k nown and h igh cost is not prohihiti\·e. as there is no method of reproduction as realistic as in the third dimension. \~'ith aerial hyperstercos in color the pract ical equi Yalent of an exact model in full n atural color can he secured quickly. efficiently, and at com parati\'cly low cost. Viewing the "color models'· is simple fo r one or many persons. They can he used to ach ·antage at management 's desk or in the field, and a file of slides can he built \\" hich will contain immed iately aYa il ahk- iniormation on m any phases of an industry or operation whic h can he secured l,\" no other method h itherto :I\ :1il:d,!t-. ,-1/RCR ,JFT

Jet Boost

Publication

AVRO Museum

Name/Title

Entry/Object ID

Description

Category

Publication Details

Author

Publisher

Web Links and URLs

General Notes

Note