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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Statistical report on exhaust complaints broken down by vehicle model over two quarters.

Identifier  ExFiles\Box 130\1\  scan0086
Date  30th September 1933 guessed
  
- 6 -

20 HP. 25 HP. PH.I. PH.II. TOTAL. GRAND TOTAL. REMARKS.

TOTAL EXHAUST COMPLAINTS.
September Quarter. C.C. 1 4 7 33 45)
W.P. - 6 - 24 30) 75
Previous Quarter. C.C. 3 19 2 47 71)
W.P. - 8 - 21 29) 100
Six Months. 4 37 9 125 175 175

EXHAUST MANIFOLD CRACKED OR BROKEN.
September Quarter. C.C. 1 - 4 1 6)
W.P. - 1 - 3 4) 10
Previous Quarter. C.C. 2 9 1 3 15)
W.P. - 8 - - 8) 23
Six Months. 3 18 5 7 33 33
REMARKS: 20 HP. and early 20/25. - Exhaust manifolds with cooling fins are now available. No failures of this type yet reported. Depot Sheet Hd.{Mr Hayward/Mr Huddy}229. PH.I. - Expansion allowance now increased and malleable castings available. Also sliding joint type of exhaust manifold being tried out for extreme cases. PH.II. - Flange Bosses now thickened up to prevent cracking.

EXHAUST SILENCER CORRODED.
September Quarter. C.C. - 2 - 1 3)
W.P. - - - - -) 3
Previous Quarter. C.C. - - 1 3 4)
W.P. - - - - -) 4
Six Months. - 2 1 4 7 7
REMARKS: All silencers are now being Parkerised and a longer life is expected.

EXHAUST BLOWS GENERALLY AND CUT-OUT SEIZED, OR RATTLE.
September Quarter. C.C. - 2 3 31 36)
W.P. - 5 - 21 26) 62
Previous Quarter. C.C. - 10 - 41 51)
W.P. 1 - - 21 22) 73
Six Months. 1 17 3 114 135 135
REMARKS: This trouble on Phantom II is caused by the sliding joint not working properly and is cured by modifying the sliding joint and fitting an addition stay to the rear silencer as per Depot Sheet Hd.{Mr Hayward/Mr Huddy}199 and Hd.{Mr Hayward/Mr Huddy}218.
  
  


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