The Six Stroke Engine > Specifications
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WELCOME BACK TO: THE SIX STROKE ENGINE - SPECIFICATIONS 15 FEB 2011
My original cylinder head invention and early Beare engine prototypes have of recent years been undergoing much redesign & revision, I plan to post revised and complete specifications, as soon as prototypes based on my latest specification/inventions have undergone mandatory patent registration, official trials, and testing.
Meanwhile, please see below specification postings based my early development Beare Ducati prototype.
Thank You.
Malcolm Beare
Prototype 5 - Ducati Based |
 |
Engine Type |
Air-cooled opposed-piston rotary- & reed-valve 90° V-twin |
Bore x stroke |
86 x 57 lower, 60 x 25 upper |
Capacity |
616cc intake, 575cc compression corrected, 643cc expansion corrected, 592cc exhaust.
616cc intake, 756cc compression, 732cc expansion, 592 cc exhaust
Measurements taken with upper crankshaft 20° retarded
Corrected measurements taken after ports are closed. |
Compression ratio |
10.6 : 1 (approx) |
Fueling |
4 x 35mm Mikuni CV carburettors |
Ignition |
Dual ignition, Ducati CDI & two H-D 12 volt coils |
Power |
40 bhp at the rear wheel at 5000rpm as tested after Sir Alan Cathcart's test ride. (Computer predicts 86bhp @9000rpm, 41 ft/lb @ 6000rpm) |
Valve timing |
Intake open 20° BBDC 520° close 60° ABDC 240°
Duration 440° (this is not a mistake)
Maximum port area at 20° ATDC
Exhaust open 40° BBDC 500° close 60° ATDC 60°
Duration 280°
Maximum port area at TDC 0°
Overlap 260° (also not a mistake)
The reed valves control the beginning of intake according to engine demand. |
Transmission |
Clutch: wet multiplate
Gearbox: 5-speed
Final drive: 520 chain |
Frame |
Garden gate style 1" square tube space frame |
Suspension |
41mm FZR Yamaha forks, 50 x 25 RHS steel swing arm, twin Koni dampers |
Brakes |
Front: twin Ø 300mm floating discs with 4-piston calipers
Rear: single Ø 220mm disc with opposed piston caliper |
Tyres |
Front 120/70 VR17, Rear 160/60 VR17 |
Wheelbase |
1400mm |
Rake/Trail |
98mm/23° |
Weight |
153kg dry |
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