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FLIGHT, July 6. 1939.

A striking study showing the formation of the geodetic structure and theinterior as seen from the rear catwalkOn the left is the hot-air pipe whichruns practically the whole length of

the fuselage.

system actuates the rota ting, e levating, and depressing ofthe guns in the i r tu r re ts .The undercarr iage comprises the two main wheels andthe ta i l wheel, a l l of which re tract simultaneously underhydraulic power, their posit ions being signalled by visualand audible means. Ea ch unit of th e main gear embo diesa double -ac t ing hydraul icjack in conjunction with atwin-leg transversely bracedassembly with a folding backsta y. All thre e wheels ?.recompletely enclosed duringflight.As at present in servicethe Wellington has Vickerspower-dr iven gun turre ts inthe nose and stern, the forward tur re t hous ing onemachine gun . and the rea rtur re t two of these weapons .Provision is made in thebottom of the fuselage forthe insta lla t ion of a power-d ri ve n r et ra ct ab l e t u r r e thous ing anothe r two.

A certain number of theWellingtons delivered to theR.A.F. are fitted with dualcontrol, as shown here. Thevisual indicator for the undercarriage occupies the centralposition on the main instru

ment panel.

The Wellington I normally carr ies acrew of four, made up of a pilot, afront gunn er (who is a lso the bom baimer or navigator) , a wireless opera tor (who ac ts a l te rna t ive ly a s themidships gunner ) , and a r ea r gunner .Provision is made to carry a f if thm a n .The cabinwhich , due to the geodetic construction, provides a largeamount of unobs t ruc ted spaceis exceptionally well l ighted for a mili tarymachine , than ks to th e de le t ion offabric over a number of the geodeticpanels. Fro m the cabin proper a catwalk extends through the fuselage tothe ta i l gun turre t . In the nose, jus tbehind th e turre t , is a prone posit ionfor the bom b aimer. This section ofthe fuselage is provided with a largetra p door for em ergency ex it ; i t isspr ing-loaded and operated by a pedal.Additional emergency exits are provided farther aft in the fuselage, and

the occupants of the nose and ta ilturre ts are provided with f iremen'saxes to enable them to hack throughthe Perspex enclosures.A number of the machines delivered have dual controls,but these are not normally f i t ted for active service .Equ ipm ent , in addi t ion to an e labora te wire le ss and D / Finsta lla t ion, comfortable navigating facil i t ies and an automatic pilot , includes an inf la table dinghy housed in thepor t engine nace l le ; a lava tor y ; a r e s t b unk ; s towage for