Hi Schneiderman, your list is good, I would say E94 is the factory number for the VIID, the Lumsden book also quote’s this.
JDK, thanks for the photo, that is one hell of an engine in a small boat !
Andy
Hi fantasma_337, the links are great, thank you.
Roger, the engine number should be on top of the spur gear casing, if not visible as some were stamped over when rebuilt, it is also on the front of the head’s and cam cover’s fairly close together.
Enjoy your visit.
Andy
Hi Roger, the only other details I have for the Cosford engine is the rebuild number of ” INSTR 1915B “.
Andy
Hi Roger, the list is looking good, the Cosford Srs. V is definately 50479 with a rebuild number added later.

Andy
Hi 11group and all,
Is this the same a/c that had an engine failure, then a replacement with a subsequent problem which seem’s to be focused on the bolt in the picture, I ask the engineer’s on here, is the bolt the cause of the first and second engine’s problem’s ?
Andy
Hi Jimw and all,
Jimw, I have the ex-Australia/Shuttleworth engine from Chris William’s, it is a Mk.VA, I am rebuilding it to ground run, he is very helpful and is a very accomplished engineer.
The rebuild is coming along well and I hope to be running next year.
Roger, the list is looking good, thank you for your time on this, it is very important to keep track of these and all other early engine’s.
Andy
Hi Stuart and all, I had a good look at the “Machin” Merlin, it seemed fairly untouched as regard’s to being rebuilt but good and relatively easy to run up.
I understand it went for a lot more than £5k, I am sure that more learned people on here will know exactly what it went for.
Of the 5 engine’s in the auction the best engine in my opinion was a Bristol Hercules that was in a very clean and complete condition.
Andy
Hi Jerryw and all,
this is my favourite era of aero engine’s, the early big horsepower unit’s, the Lumsden book has some incredible photo’s of these engine’s and their ” group’s of people” name’s.
Please post the list for us all.
Andy
Hi everyone, one of the important anniversaries this year is the “200th” anniversary of the start of “D.Napier and Son”, as you know, maker’s of some of the finest aero engine’s and engineering product’s ever made.
A party was held earlier this year and brought together the Napier-Railton, a Napier Deltic engined loco, various aero engine’s, memorabilia and many of the ex-Napier employee’s.
Andy
Hi Roger and all, thanks for the updated list’s, it is looking better all the time,
I am interested in checking out a couple of engine’s with number’s “out of date order”,
23815 Mk.V Preserved at R.A.F.Museum, Hendon
and
39645 Mk.V Preserved at Science Museum,
If these are type “V” I would have expected number’s between “50000 and 52000”.
Also if the Portuguese engine is a “Mk.I” it will be quite different especially the water jacket’s.
My understanding of the Lion marque’s is as follow’s,
Mk.I engine’s were really classed as prototype’s.
Mk.II 450bhp, spur gear drive, front mounted carb’s.
Mk.IIB 470bhp, spur gear drive, front mounted carb’s.
Mk.V 470bhp, spur gear drive, front mounted carb’s.
Mk.VA 500bhp, spur gear drive, front mounted carb’s.
Mk.VI 525bhp, direct drive, turbo-charged.
Mk.VII 680bhp, direct drive, rear mounted carb’s.
Mk.VIIA 875bhp, direct drive, high compression , rear mounted carb’s.
Mk.VIIB 880bhp, double reduction spur drive, high compression,rear mounted carb’s.
Mk.VIID 1320bhp, double reduction spur drive, high compression,rear mounted carb’s, supercharged.
Mk.VIII 535bhp, direct drive, rear mounted carb’s.
Mk.IX 500bhp, spur gear drive, rear mounted carb’s.
Mk.X 460bhp, spur gear drive, rear mounted carb’s.
Mk.XI 530bhp, spur gear drive, rear mounted carb’s.
Mk.XIA 530bhp, spur gear drive, rear mounted carb’s.
Mk.XV 555bhp, spur gear drive, rear mounted carb’s.
My information is from various sources including the great Lumsden book.
Thanks again for the information.
Andy
Hi All, I have added some information to the list,
A.T.C., 1338 Sqdn, Seaham Sea Lion
Brooklands Museum Mk.XI? fitted in Napier-Railton car (running?)
Brooklands Museum Mk.XIA Special (no. 66113) from Fairey Long Range Monoplane 1933 on loan from Napier Power Heritage (incomplete)
Imperial War Museum Mk.? (no. CRA1251)
Camden Air Museum Australia Mk.XIA ( no. 66017 )
IWM, Duxford Mk.IB donated by Cambridge Uni Eng Dept (sectioned)
Maltese Air Museum Mk.V ( crash recovered Fairey 111F )
Manchester University Mk.VIIB
Merga Oasis Sudan Mk.XIA (crash site )
Museum of Flight, East Fortune Sea Lion
National Motor Museum, Beaulieu Mk.VIIA installed in “Golden Arrow”
National Motor Museum, Beaulieu Mk.II No. 25719(cutaway)
National Maritime Museum, Greenwich Mk.VIID ex “Miss Britain III” – supercharged
Omaka Air Museum Sealion ( No. 66948 )
Ottawa Aviation Museum Mk II (ex Vickers Viking )
Portugese Air Museum Mk I (No. 50095)
RAFMuseum, Cosford Mk.V (no. 50479)
RAFMuseum, Hendon Mk.V
RAFMuseum, Hendon Mk.VIIA (no. N47-50179)
RAFMuseum, Hendon Mk.VIII
RAFMuseum, Hendon Sea Lion
Rolls Royce Heritage Trust, Bristol Mk.II or Mk.V (owned by RAFM? – may have
moved to Derby)
Science Museum Mk.V (no. 39645) (sectioned)
Science Museum Mk.VIIA (no. 63016) installed in “Miss England” powerboat ex “Golden Arrow” LSR car
Shelley, R.C. Collection Mk.V (no. 50108) ex Blackburn Velos G-AAAW
Shuttleworth Collection Mk.V (sectioned, motorised)
Smithsonian Institute Mk. II
Solent Sky, Southampton Mk.VIII (no. 62418) ) telecon with Solent Sky inf-
Solent Sky, Southampton Mk.? ) ormed me they have “one, ex
Solent Sky, Southampton Mk.? ) Gloster Racer and three Sea
Solent Sky, Southampton Mk.VIIB ) Lions”. E-mail sent
Think Tank, Birmingham (ex Museum of Science & Industry) Mk. VIID (no. 63307) installed in Railton speed record car
Think Tank, Birmingham (ex Museum of Science & Industry) Mk. VIID (no. 63308) installed in Railton speed record car
Williams, Chris Bentley Napier Sea Lion (running)
Plus,
Andy/Racer2 UK Mk.VA (no. 51383 also marked N.1405 & INSTR 1474B – under rebuild)
I hope that helps a little.
Andy
Hi Roger, the list is looking good, I will have a look here and see if any other’s come to light.
The Lion engine number is in the output shaft area depending on model, but most of the in house component’s are also numbered, head’s,cam cover’s and manifold’s definately.
Andy
Hi Everybody, the jibe is completely correct and well founded and I am happy to accept it as a compliment, thanks Robin, the Leonides was used “on it’s side” and “looking up” but when we mounted the engine as is, we then found that it was from a Bristol Sycamore.
RPS, thanks for your time on the list, I have more question’s for you, is there any aircraft in existance that had a Lion fitted ? is the Supermarine Southampton fuselage at Hendon the most complete ?
I am trying to ask everybody with an interest in the Lion to look out for original carburettor’s for me, any help will be well recieved.
Andy
Hi Stuart, thank you so much for confirming the collection, and your time and interest.
I have been pressure testing water jackets on 2 Lion engine’s over the weekend, one more thing on the big list ticked off.
Please keep in touch.
Andy
Hi Roger, I am trying to find out a little more regarding the R C Shelley collection as I have recently found documentation giving me the type of plane my Lion was fitted in, the same as the collections engine.
How is the Lion list going on ?
Andy