Document O3Vez82yaMV5RDK2LBkyobNrv

ETHYL CORPORATION RESEARCH LABORATORI ES 1600 WEST EI GHT MI LE ROAD . FERNDALE 20 , DETRO IT, M ICH IGAN April 27,1953 D r . Rob er t A. Kehoe Ketterin g Laboratory Eden Avenue C in cin n at i 1 9 , Ohio ... Dear Bob: V We ar e sen d in g to you w it h t h i s l e t t e r two Et h y l la b o r a t o r y r e p o r t s: RM-1;6 RM-7U Air b or n e Com bustion P r o d u ct s o f Leaded F u e ls 'by K a r l Beav er , March 5> 1952. Air b or n e Com bustion P r o d u ct s o f Leaded Fu e ls by K ar l Beaver, A p r il 21, 1953* The f i r s t o f t h e se you h ave seen b e fo r e , b u t we sen d i t again fo r your con ven ien ce as backgroun d fo r th e secon d. As you 'mow, we sen d them a s b a i t t o p er su ad e you t o come up h e r e , when you can , an d t a l k ab ou t th em. They d e a l w ith where we st a n d , t e c h n ic a lly , on "w h at conies ou t o f th e t a i l p i p e o f an au t o m o b ile ", as fa r as le ad i s concerned. The f i r s t r e p o r t c o n sid e r s th e t o t a l amount o f l e a d . I t may be in t e r p r e t e d by t h in k in g o f the m u ffler and t a ilp ip e system as a p a r t i a l con d en ser . At low r a t e s o f t h r o u gh - p u t a s low as 1G$ o f th e in p u t l e a d comes ou t un der st e a d y o p e r a t io n , b u t a t 60 mph as much a s 50/o. The r e sid u e s seem t o st a y beh in d an d come o u t in b u r st s an d b i g .p i e c e s d u r in g a c c e le r a t io n .or sudden, t em p er atu r e ch an ges. The secon d r e p o r t d e a ls w it h p a r t i c l e s i z e s o f t h e le a d compounds, and th e in d ic a t io n s, from st ead jr sp eed and a c c e le r a t in g t e s t s , ar e t h a t m ost o f th e le a d exh au sted in n orm al c i t y o p er at ion ap p ear s as p a r t ic le s la r g e r th an 5 m icron s. We w ould be ver y g la d t o h ave y ou r c r i t i c a l o p in ion o f t h i s work and th e o p p o r t u n it y o f d isc u ssin g w it h you what d ir e c t io n fu t u r e work m igh t take. W ith b e st p e r so n al r e gar d s,