The Kneeslider

Doers Builders and Positive People

Do It Yourself PulseJets from Robert Maddox

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Three years ago The Kneeslider showed you a pretty basic pulsejet powered bicycle Robert Maddox had for sale. As projects go, it was pretty neat and after our short article Bob started getting attention from everywhere, you might say things have been (ahem) buzzing for Bob ever since. Well, he's still at it, building more and bigger variations of these jets and strapping them … [Read more...]

Horex Engine Patent Indicates W Configuration

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Doug dropped me a note to take a look at the engine patent application from Horex for their offset cylinder inline engines. Their VR6 engine has two staggered rows of 3 cylinders in a narrow 15 degree V configuration with triple overhead cams. Nice engine. They first describe the advantages of compact size for a V-inline configuration and discuss such things as an inline 5 or 6 … [Read more...]

Pinnacle Engines – Cleeves Cycle Ultra Efficient Combustion Engine

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Well, here's another entrant in the opposed piston, super efficient engine sweepstakes, it's called the Ultra-Efficient Combustion Engine and it's from Pinnacle Engines. As with many, if not most other designs, this engine is in the "we're almost there" category. It looks like it has a lot of potential, but will it be superior to the many other opposed piston variants? Until … [Read more...]

EcoMotors Teams with Navistar to Produce Turbo Diesel OPOC Engine

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Unlike some innovative engine designs perpetually hyped as the engine of the future, EcoMotors' OPOC engine seems to be making real headway. They have reached an agreement with Navistar to build a 2 module turbo diesel version for Class 8 trucks, designed to produce about 480 hp, it could deliver as much as 45% better fuel efficiency than the standard heavy duty diesel engines … [Read more...]

Aluminum Block to Engine Block

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Here's how Kirkham Motorsports, the guys that build those aluminum bodied Cobra roadsters, put a big block of aluminum on a diet. You start the workout with 30 hours of CAD work followed by 50 hours of programming and finish with 30 hours of CNC. This exercise formula trims the overweight 386 pound block of aluminum down to a svelte 64 pounds of engine block. Yes, you've … [Read more...]

Nembo Super 32 Inverted 3 Cylinder Motorcycle Construction Photos

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Just a couple of months ago, Daniele Sabatini sent me photos of the brand new Nembo Super 32 inverted 3 cylinder engine. It caught everyone by surprise, to say the least, and much confusion ensued in the comments. Some of you weren't even sure they could build a motorcycle around that engine. Daniele chose to answer his critics by continuing his work and I just received these … [Read more...]