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4 Round bar marked and fixed in vise. 5 3/ 8 BSF thread cutting die. 6 Die in die stock ready to cut threads. 7 Right hand threads complete, bar cut to final length. 8 High strength Loctite 262 applied to adjusting nut. BSF threads, the core diameter will be 0.310 inches. Thus the area of the minimum cross-section through the part will be 0.0755 in. 2 (Area = π × (diameter ÷ 2) 2 = 3.14159 × (0.310 ÷ 2) 2 = 0.0755 in. 2 Tensile strength of the part is calculated by multiplying the area of the minimum cross section by the yield strength of the material. (P = 0.0755 in. 2 × 60000 lb./ in. 2 = 4529 lbs) In the Machinery’s Handbook (Tenth Edition, ca. 1939), a safety factor of 6 is specified for steel parts that experience varying tension such as this clutch adjuster. Thus, this part can comfortably receive a tensile load of 755 lbs. (4529 lbs. ÷ 6) and expect a long life. Since the mechanical advantage from the clutch pedal to this part is seven or eight to one, reaching 755 lbs load at the part is not possible because the clutch pedal will begin to disengage long before ~100 lbs of force can be exerted at the pedal. Therefore, the easiest to machine steel (12L14) can be used and still yield a robust part. Sequence of Operations Forming threads with a die requires a respectable amount of force to be applied to a firmly gripped workpiece. When gripping the part firmly enough, using either a vise or a chuck in a lathe, damage to the bar stock will inevitably occur. Thus, you need to plan out the sequence of operations so that the damage will be where it can be machined or cut away in the final steps. For example, our clutch piece requires a 5 inch part with two inches of useable right hand 3 / 8 BSF thread on one end and two inches of left hand 3 / 8 BSF thread on the other. There is one 9 The finished product. complication: the 3 / 8 BSF sized hex in the middle of the part. Unlike the original, which was machined from 0.600 hex bar stock, our reproduction will run right hand thread past the center of the part which will allow a 3 / 8 BSF nut to be threaded down to the center and fixed in place with high strength Loctite 262. Our sequence of operations: 1 Cut a 6 or 7 inch piece of 3 / 8 round bar stock. Install it in the vise at one end and mark the point where the threads will stop. 4 2 Cut right hand 3 / 8 BSF threads down to the mark. 5 , 6 , 7 3 Install the center nut and temporarily lock it in place with the second locking nut. Grip the piece in vise by the center nut and cut it to length. 4 Cut left hand 3 / 8 BSF threads for two inches. 5 Remove locking nut and use Loctite 262 to secure remaining nut in place. Assemble finished product. 8 , 9 Thread Cutting Tips There are a number of ways to thread a part, but the best and easiest for one or two parts is to use a threading die. UNF dies can be purchased at better hardware stores, Sears, mcmaster.com, and mscdirect.com. Dies with more esoteric threadforms and left hand threads are available from online specialty suppliers such as britishfasteners.com and rdgtools.co.uk. Make sure you have a die stock that will securely hold the die. Fix the part firmly in position. Lubricate the part with light oil or WD-40. Rotate the die stock clockwise (CCW for left hand thread dies) while applying firm, even pressure down the axis of the part. It is very important to start the die evenly, otherwise the threads will be uneven from side to side and as a result, the part may bend or the die might break. Admittedly, a little practice is in order, so purchase extra material, and perhaps an extra die. Wear eye protection and watch out for and file down sharp edges. Do not ingest the metal chips or lubricants and hold off on the adult beverages until after the project is complete. ©The ©The Rolls-Royce Rolls-Royce Owners Owners Club, Club, Inc. Inc. 9106 THE FLYING LADY November / December 2008 [ search engine powered by magazooms.com - empowered by alQemy.com ]
Follow-up: FL 08-1 “Mallalieu” Reader John Parker (CT) sent these photos and writes: “I knew Denny [Mallalieu] when he built the first roadster. It was a very quick motorcar. He was a fun fellow, and Sybil was such a good lady, and fond of amusement, too. She and Denny were instigators and major participants in the filming of the classic The Great Rolls-Royce Bank Robbery. Shortly after meeting them, Amy [John’s wife] and I took one of a number of holidays in Britain. This time, in 1969, we came across the car in these photos. It was not a Mk VI but a prewar chassis, probably a 4¼L. The craftsmanship was superb and I can personally attest that it went like the proverbial scalded cat. The owner and creator was in the process of creating another similarly attired chassis in his shop, which I believe was in either Midhurst or Goodhurst. He said he did not Books My Lifetime in Motorsport by S C H “Sammy” Davis Herridge & Sons (in US: MBI, www. motorbooks. com), 2008. 192 p., 140 b/w illos. Hardcover. ISBN-13: 978 1 906133 02 3. $44.95/£22.50 The subtitle “His Final Autobiography“ alludes to the fact that this is Sammy/Sydney Davis’ third version. The first two were published in 1932 and 1949. This last one was first submitted, unsuccessfully, in the 1960s for publication when Davis (1987– 1981) already was in his eighties. It remained a work in progress and passed, posthumously, through several custodians until editor Peter Heilbron undertook to edit and illustrate it, as well as append it with supplemental materials. Among the latter is a transcription of one of Davis’ logbooks that records all his motoring activities in 1913/14, from picnics to races to road tests. Aside from being one of the early Bentley Boys, Davis had a colorful professional, and private, life that mainly revolved around anything to do with motorbikes and cars. Belying an unassuming almost nondescript appearance, Davis’ formidable Welsh temper and dry wit could find expression on the racetrack as much as on the page. While being a race driver he also assumed, for several decades, the role of Sports Editor of The Autocar. One must assume that Davis intended for this third version to supplant the earlier ones but it is know Denny, but it is amazing to see the resemblance of his car to B146FV on FL p. 8776. Perhaps someone can shed light on this chap and his work” not clear if he deemed them deficient or unsatisfactory or just incomplete. At any rate, this version tells the whole story of his life from childhood to old age and everything in between. The writing is largely as he set it down but edited to remove duplication etc. (Despite a career in writing, Davis was dyslectic.) An epilogue talks about his son Colin, who wrote the Foreword. Many of the photos have not been published before; there are a large number of Davis’ cartoons. Extensive appendices, Index. Car Collecting by Steve Linden Motorbooks, 2008. 160 p. Softcover. ISBN-13: 978 0 7603 2809 5. $24.95 Collecting is not cheap, and expensive mistakes are easily made. Written by an appraiser and restorer, this book dispenses advice on all stages of collecting, from deciding what type of car you want to sourcing, Readers are reminded that 1969 was the very year in which the Parkers were introduced to 83AG, the chassis-only 1921 Silver Ghost that prompted the epic 10-year-long project of John resurrecting the car and building his own body. acquiring and, ultimately, maintaining it. While the book seeks to address both novice and seasoned collector it is really mostly the former who should expect to gain from it, especially in the sections on the not-so-obvious aspects of auction buying (premiums, financing, registration, etc.) and insurance and appraisals. On the other hand, the section on valuation and trends is best ignored. (“Today’s $20,000 cars will become $30,000 cars” hardly explains why last year’s $250K 1970 Plymouth Superbird strug- ©The ©The Rolls-Royce Rolls-Royce Owners Owners Club, Club, Inc. Inc. November / December 2008 THE FLYING LADY 9107 [ search engine powered by magazooms.com - empowered by alQemy.com ]
Page 1 and 2: ©The ©The Rolls-Royce Rolls-Royce
Page 3 and 4: Conduit From the President In my la
Page 5 and 6: Great News and Big Changes at the R
Page 7 and 8: the attending lifestyle aspects ske
Page 9 and 10: A tight corner, taken at ca. 40 mph
Page 11 and 12: The Goodwood Estate Company Ltd. At
Page 13 and 14: When you see the car surrounded by
Page 15 and 16: Arturo Peralta Loosely related to t
Page 17 and 18: Sir Henry Royce Memorial Foundation
Page 23 and 24: RRMC From the very beginning of Pro
Page 25 and 26: Rarely seen, Charles Puttkammer’s
Page 27 and 28: The Grand Hotel on Mackinac Island
Page 29 and 30: Dave Brooke’s 1929 Phantom II Thr
Page 31 and 32: 1987 Corniche DAH-16920 MPW dhc Dri
Page 33 and 34: Howard Krimko This photograph was t
Page 35 and 36: oad, was until the recent construct
Page 37 and 38: No rest for the wicked. 7KG being w
Page 39 and 40: We are assured that this is the bes
Page 41 and 42: This Duesenberg Model J won First i
Page 43: Outside Diameter Core Diameter TPI
Page 47 and 48: aero engines), and the biggest of a
Page 49 and 50: Bazaar CARS FOR SALE Fax to: RROC H
Page 51 and 52: owner. Coupe body style is twice as
Page 53 and 54: from day one; 2 phones; 3 TVs; DVD;
Page 55 and 56: VINTAGE TIRES for RR & Bentley moto
Page 57 and 58: “Think it’s only an investment
Page 59 and 60: Woodwork Refinishing, Reveneering &
Page 61 and 62: PRE-1955 BENTLEY CREWE-BUILT ROLLS-
Page 63 and 64: TRUST CREWE GENUINE PARTS TO KEEP I

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