Search results

I've been looking at my iconic Webster periodically the last couple years. With an idea in mind..... 🤔 What if Joe Webster designed a twin version? Not too many horizontal gas engines favored in the forums beyond hit and miss. This fall was the year to develop that concept with just enough...

Thanks Methuselah1. I idle the models along on their run time in the garage and in display at local exhibitions.

Decrease your valve overlap. Compression at 8:1 seems too high. I pressurize my cylinders with a rubber tipped blow off nozzle to the spark plug hole off the air compressor at very low PSI and turn engine over for compression pressure and intake vacuum draw if the valve timing is near correct...

Using cylinder liners with O-rings for my gas engines. The liner supports the inner diameter of the O-ring torqueing down the head and a tapered groove recess in the block and cylinder head prevent squeeze out. Plumbers O-rings as the liner seals out combustion gas to the O-ring.

🤔........I should have something ready in January.

A VIEW BACK ON MY LAST FEW YEARS OF MODEL ENGINE BUILDING. TWO, THREE AND FOUR CYLINDERS. SELF DESIGNED AND BUILT WITH A SENSE OF UNIQUENESS OF FEATURES UNCOMMON IN STANDARDISED MADE TO PLAN MODELS. ENJOY THE PRESENTATION!

You won't notice a difference in RPM changing out the crank of a different stroke nor a smoother runner because of such. These parameters lie elsewhere in balancing of the rotating assembly and mounting isolation, fuel induction pathway diameters and flywheel inertia. Since the flywheel is the...

If you have threaded the piston and the rod in the lathe you should have a match for straightness assembled. You can lock the piston with shaft in the 3 jaw and slow spin and see if the shaft end is running eccentric. Then tap it into parallel with its piston with a soft mallet. This action may...

See my introduction in the build log here! LONGBOY'S "SQUARE FOUR" MODEL GAS ENGINE.

Yes, atmospheric valve blocks between the two cyl. banks. You can view the build log here in the Photos and Videos forum.

A pair of 180deg crank twins combine together on a centralized flywheel shaft for a rare configuration engine, the Square Four. From LONGBOY ENGINE.

Ich habe mit Stirling angefangen und bin zur Verbrennung übergegangen und war von Anfang an ein glücklicher Motorenbauer. Viel Glück bei Ihren Fortschritten!

I approve! (new pipes).

Thanks for joining me in an introduction to my new engine, Longboy's "SQUARE FOUR" Model Gas Engine! Only found in the motorcycling world per my research, the Square Four found its way as a production motorcycle (Ariel), a racing motorcycle (Suzuki) and a production proposal motorcycle...

A 72T belt takes care of the cam drive. With sprockets instead of gears for the cams, that belt would have had around 400T. More cylinders need more fuel capacity and up front I was able to have twin on board vertical fuel tanks totaling about 2 OZ. SQUARE FOUR idles along for over 20...

Square four engines being a pair of 180 deg. crank twins, its cylinders in unison rise and fall diagonally. The firing order is 1-2-3-4. Though I built the engine numbering the cylinders starting with the front left, the distributor with its gear drive rotates counter clockwise. The #1 cyl...

It will be fine using upsized dia. flywheels. Webster will run slower at the same throttle or mixture feed. Shouldn't need plans to press fit your bronze tire around a 3 inch hub wheel.

Thanks CFLBob. The S/F engine is my free standing, open crank design of a rare configuration. I do not make plans or prints and no CAD but have an idea of "what goes where" integrating the individual parts as the build progresses. My purchased items include the timing set, ignition, gears...

Natural metal or black satin, I like contrast with dark deep color. For radiators, the upper part of engine blocks get the fin cladding bolted on each side.