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FLIGHT

SEPTEMBER 2OTH, 1945

ROLLS-ROYCE GRIFFON

(65)

with a change-speed switch to by-pass the aneroid and thus permit a change in blower speed for emergency use, to allow of retaining low gear for formation flying, or to allow of ground testing.

so to the volute delivering to theintercooler. tor pump is located in the up-draught throat

An accelera- between the

nozzle spider and a single nozzle.

the impeller

eye,

and

discharges

through

In order that no ill effects result from small axial movement as between the driving gears of the speed- change unit and also to preclude the effects of an over- hung drive, the respective drive pinions on the impeller

shaft are

not integral.

pinion is

mounted on

In point of fact, the impeller shaft

only itself,

the

M.S.

the

F.S.

pinion being supported in a housing around drive sleeve, with a bell coupling separating and splined to each.

the

spring-

the

pinions

The inter-s'tage impeller case cooling has the effect of increasing the charge density as an irTtermediate measure, and by so doing increases the capacity efficiency ofthe

second stage.

This principle lies

main

intercooler,

for an

increase

behind the use of the in charge density fora

given volume enhances the volumetric although this leads to a large flow through

efficiency, and the carburettor

and, thus, a higher increase, thestep-up

consumption, relative in consumption is well

to the power worth while.

Induction is updraught through a triple-barrel- throttle in the mouths of which are the Venturis for fuel metering

balance.

Thecarburettor is a Rolls-Royce

the

Bendix-Stromberg

metering

injector,

modification of and supplies a

governed

measure

of

fuel

to

a

series

of

discharge

nozzles

arranged in a " h u b On the downstream

" from which side of these

project eight is created a

"spokes." depression

or turbulent area into which and from here the mixture is

the fuel nozzles discharge, taken straight into the eye

of the first-stage impeller. are interposed between the in this inter-stage area the

Rectifying and diffuser vanes first and second impellers, and blower casing is cooled by its

own the

little coolant system. From charge is passed through a

the second-stage impeller further diffuser ring and

For the future, Rolls-Royce have evolved a metering pump to supplant the present system, and it also seems likely that water / methanol injection will be introduced before very long, not necessarily only as an emergency

measure but as a normal running jection to individual cylinders will

condition.

Direct in-

also,

without

doubt,

eventually be incorporated. new metering pump : it is

There is this to be said forthe an extraordinarily simple unit

of great reliability and meters so accurately throughout the whole performance range that it is not too much of an exaggeration to state ,,that flights could be planned to within a half-gallon of fr^ll endurance. With this is natur- ally Jjj3lwfr"1T*TOn*«4«nd pre-knowledge of specific con-

ption such as hjpsn^yer before been known.

Sir Arthur TedderV 'omotioii of the Royal Air Force ^A Deputy Supreme Commander M&rsl H E L o n d o n G a z e t t e o f S e p t e m b e r n t h a n n o u n c e d t h e p r o m o t i o n o f A i r C h i e f M a r s h a l S i r A r t h u r Tedder, G.C.B., to Marshal of the Royal Air Force. T JOL T h e p u b l i c r e m e m b e r s S i r A r t h u r c h i e f l y a s h a v i n g b e e n A . O . C . - i u - C . t h e M e d i t e Times. r r a n e a n A i r C o m m a n d f r o m 1 9 4 3 u n t i l h e w a s a p p o i n t e d D e went to France in p u t y S u p r e m e C o us __ m m a n d e r o f t h e A l l i e d A the war was mentioned r m i e s o f L i b e r a t i o n u n d e r G e n e r a l o f p r o m i s e . H e e n t e r e d t h e A r m y i n 1 9 1 3 w i t h a U n i v e r s i t y c o m m i s s i o n f r o m C a m b r i d g e , w h e r e h e w a s a t M a g d a l e n e C o l l e g e . A s a n u n d e r g r a d u a t e h e g a i n e d a U n i v e r s i t y S i r o n t h e ^ N a v y o f t h e R e s t o r a t i o n , w h i c h w a s i e w e d i n / ^ h e H i s f i r s t c o m m i s s i o n w a s R e g i m e n t , a n d w i t h i t h e h e b of in he commanded 1917 Arras No. e , l < 5 n g s t o t h e h o n o u r a b l e c o m p a n y o f " O l d : m p t i b l e s . " , . ~ ' l n 1 9 1 6 h e w a s s e c o n d e d t o t h e R o •—. two-seaters. y a l F l y i n g C o r p ? , a n d d u r i n g s e v e r a l t i m e s i n d e s p a t c h e s . > 4 u t t h e b a t t l e 7 0 S q u a d r o n , w h i c h w a s e q u i p p e d w i t h 1 8 S o p w i t h S i n c e t h e 1 9 1 8 A r m i s t i c e T e d d e r s a w s e r v i c e d u r i n g t h e C h a n a k c r Eisenhower. had been full But his earlier career i s i s i n 1 9 2 2 . I n 1 9 2 8 h e a t t e n d e d a c o u r s e a t t h e I m p e r i a l D e f e n c e C o l l e g e a v e r y g o o d p r e l i m A.O.C. Far East i n a r y f o r h i s s u b Command, with s e q u e n t p o s t a s D e p u t y S u p r e m e C o m m a ^ f l e r o f B r i t i s h a n d A m e r i c a n f Marshal of trie R.A.F. o r c e s o f a l l S e r v i c e s . I n 1 9 3 6 h e w a s a p p o i n t e d h e a d q u a r t e r s a t S i n g a p o r e . H e h a s a l s o h e l d v a r i o u s i m p o r t a n t p o s t s a t t h e A i r M i n i s t r y , i n c l u d i n g t h a t o f D i r e c t o r - G e n e r a l o f R e s e a r c h a n d D e v e l o p - m e n t a n d ' D i r e c t o r o f T r a i n i n g . Arthur G.C.B. Tedder,

LINCOLN'S CIVIL SISTER : A new photograph of the Avro Tudor I doing a little overweather flying. Thewing arrange- ment of the Lincoln and the Tudor I is identical.

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