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Bentley

Hunt For The Blower Bentley-Kevin Gosselin

Hunt For The Blower Bentley-Kevin Gosselin

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Vehicle data plateRef 27206
Brand
Bentley
Vehicle
Car
Models covered
Blower Bentley
Format
PDF, searchable, print-ready
Delivery
Instant download after checkout
Language
English

What happens after you pay

  • Download link opens on the order page immediately
  • The same link is emailed to you — re-download any time
  • Open on phone, tablet or PC; print only the pages you need
  • Not sure it covers your model year? Ask us before you buy
🏷️ Basic Information
Identification
Make:
Bentley
Model:
4.5 Litre (Blower Bentley)
Chassis Number:
SM 3912
Body Style:
Two-seat DHC (Drophead Coupe)
Body Manufacturer:
Gurney Nutting (likely, though product info mentions 'Phillips bodied', this is historically inaccurate for SM 3912 which was Gurney Nutting)
Original Owner:
Lord Brougham & Vaux
Codes
Engine Code:
Derived from the 4.5 Litre chassis, supercharged variant
👋 Introduction
Market Position
Category:
Automotive History / Automotive Mystery / Bentley Marque Enthusiast.
Competitive Analysis
Similar Products:
Books focusing on specific rare or historically significant automobiles, automotive mysteries, or the Bentley marque.
Key Features
Unique Selling Points:
Investigative narrative, focus on a specific and historically significant Bentley, and the mystery of its disappearance.
📋 Manual Details
Coverage Areas
Subject:
The history and disappearance of Bentley SM 3912, a specific Blower Bentley.
Focus:
Historical account, narrative, and investigative detail surrounding a specific vehicle.
Page Count
Pages:
Undetermined from product description.
Manual Type
Type:
Historical Account / Investigative Book (not a typical workshop or owner's manual).
Language
Language:
English
Format
Format:
Likely printed book format. PDF not specified.
📖 Manual Coverage
Systems Covered
Vehicle Systems:
Not applicable. This manual focuses on historical narrative, not mechanical systems.
Procedures Included
Operational Procedures:
None related to vehicle operation or maintenance. Details Stephan Sidlow's investigation.
Technical Depth
Depth:
Focuses on historical facts, ownership, and the circumstances of the vehicle's disappearance. No technical repair or maintenance procedures covered.
📊 Manual Specifications
File Format
Format Details:
Assumed printed book, no digital format specified.
Print Quality
Print Quality:
Not specified. Assumed standard book printing.
Binding Type
Binding:
Not specified. Likely hardcover or paperback.
Paper Type
Paper Quality:
Not specified. Assumed standard paper for books.
⚙️ Engine Specifications
Primary Engine
Engine Type:
Inline-4 Cylinder, Supercharged
Displacement:
4,398 cc (268.4 cu in)
Bore X Stroke:
100 mm x 140 mm (3.94 in x 5.51 in)
Compression Ratio:
Approx. 5.5:1 (supercharged)
Supercharger:
Concentric Arnott-Hindin supercharger (mounted in front of the engine)
Performance
Horsepower:
Approximately 200-225 bhp (at 3,500 rpm for the supercharged version)
Torque:
Not explicitly stated in product info, but significant for its era.
Fuel System
Carburation:
Twin SU Carburetors, fed by supercharger.
Fuel Type:
Petrol (high octane, likely leaded).
🔧 Transmission
Standard
Transmission Type:
4-speed manual gearbox.
Optional
Optional Gearboxes:
Not applicable for this specific model variant of the 4.5 Litre.
Features
Clutch:
Single dry plate clutch.
📐 Dimensions
Exterior
Wheelbase:
Approx. 114 inches (2,896 mm) for the 4.5 Litre chassis.
Length:
Variable by bodywork, but typically around 160-170 inches.
Weights
Kerb Weight:
Approx. 3,000 - 3,500 lbs (1,360 - 1,588 kg) depending on body.
🛡️ Safety Features
Ratings
Safety Standards:
No formal crash ratings applicable to this era. Safety features were rudimentary by modern standards.
Active Features
Active Safety:
Hydraulically assisted brakes (Dewandre system), mechanical linkage for clutch and throttle.
Passive Features
Passive Safety:
Body structure, rudimentary seatbelts (likely optional or not fitted originally).
💡 Technology Features
Infotainment
Audio System:
Not applicable. Original vehicles would have had no integrated infotainment systems.
Driver Assistance
Driver Aids:
None by modern definition. Primary assistance was the Dewandre brake servo.
Connectivity
Connectivity Features:
Not applicable.
🔧 Maintenance
Service Intervals
General Overhaul Interval:
Extensive rebuilds every few years or after significant mileage/racing, given the complexity and performance. Regular professional servicing by Bentley specialists.
Fluid Specifications
Engine Oil Type:
High-quality mineral oil, viscosity dependent on climate (e.g., SAE 30, 40, or 50). Modern synthetic oils may also be suitable but require careful selection.
Engine Oil Capacity:
Approx. 20-22 pints (9.5-10.5 litres).
Gearbox Oil Type:
EP (Extreme Pressure) gear oil, e.g., SAE 90.
Differential Oil Type:
EP (Extreme Pressure) gear oil, e.g., SAE 90 or 140.
Brake Fluid Type:
Likely mineral oil or a specific proprietary fluid for the Dewandre system. DOT fluids are generally incompatible.
Known Issues
Common Problems:
Supercharger drive belt wear, potential for bearing issues in the supercharger, engine wear due to high performance and age, carburettor and ignition tuning complexity, brake system maintenance (Dewandre vacuum servo).
Parts Availability
Spare Parts:
Highly specialized and often bespoke. Many parts require custom fabrication by specialists due to rarity.
📚 Vehicle History
Brand Heritage
Founding:
Bentley Motors Ltd. founded in 1919 by W.O. Bentley.
Motorsport Legacy:
Renowned for success at the 24 Hours of Le Mans, including wins in 1924, 1927, 1928, 1929, and 1930.
Model Evolution
Predecessors:
Bentley 3 Litre, Bentley 4.5 Litre (unblown).
Development Context:
The 'Blower Bentley' was the result of a private venture by Sir Henry 'Tim' Birkin, who bolted a supercharger onto the existing 4.5 Litre chassis to compete with the more powerful Mercedes-Benz SSK. W.O. Bentley famously disliked the supercharged versions.
Production
Production Period:
Bentley 4.5 Litre produced 1926-1931. Supercharged variants (Blower Bentleys) were built from 1929-1930.
Total Production 4.5 Litre:
Approx. 700 units.
Total Production Supercharged:
Approx. 50 units (factory-built with superchargers).
Specific Vehicle Status:
Last heard of in 1939. Its whereabouts are a historical mystery.
🏆 Awards & Recognition
Recognitions
Automotive Awards:
The Bentley 4.5 Litre and its Blower variant are widely considered iconic and significant automobiles of the pre-war era.
Ratings
Collectibility:
Extremely high. Considered among the most desirable and valuable classic cars in the world.
Certifications
Historic Status:
Many surviving examples are eligible for historic vehicle registration and concours d'elegance events.
📄 Technical Specifications
Chassis And Suspension
Frame Type:
Ladder frame chassis.
Front Suspension:
Semi-elliptic leaf springs, rigid axle.
Rear Suspension:
Cantilevered semi-elliptic leaf springs, rigid axle.
Steering:
Worm and sector steering box.
Braking System
Front Brakes:
Internal expanding drum brakes, assisted by Dewandre vacuum servo.
Rear Brakes:
Internal expanding drum brakes, assisted by Dewandre vacuum servo.
Parking Brake:
Mechanical brake acting on rear wheels.
Wheels And Tires
Wheel Size:
Typically 18-inch or 19-inch wire wheels.
Tire Size:
Appropriate for the era, e.g., 5.50/6.00x19 or similar.
Bolt Pattern:
Not applicable for wire wheels (hub attachment).
Electrical System
Voltage:
12-volt system.
Battery:
Single 12-volt battery, typically located adjacent to the engine.
Ignition System:
Magneto ignition, often supplemented by a distributor for easier starting and lower speed running.

Delivery & file format

This is a digital PDF download, not a printed book. After payment the download link appears on your order confirmation page and is emailed to the address you entered. Files open in any PDF reader on phone, tablet or computer and can be printed.

Check the model year and engine before you buy

Manufacturers change procedures, wiring and part numbers between model years and engine options. If your VIN plate shows a year or engine code that is not listed on the data plate above, contact us with the model, year and VIN and we will confirm coverage before you order.

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