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The simple solution would be to go with a camless engine. This would mean eliminating the camshaft, timing belt, and most of the associated hardware. Solenoids or hydraulic actuators open and close the valves in an infinitely variable number of ways. Valves can even be held open indefinitely, effectively shutting down a cylinder when max power isn’t necessary.

Three possessions into the third quarter, their fortune began to change and their season began to end.

Church and ministry leadership resources to better equip, train and provide ideas for today’s church and ministry leaders, like you.

Electric cars are all the rage lately, but let’s not forget about the old standby – internal combustion. The modern internal combustion engine is a marvel of engineering. Today’s engines and surrounding systems have better power, greater fuel economy, and lower emissions than anything that has come before. Centuries’ worth of engineering hours have gone into improving every aspect of the engine – with one notable exception. No automotive manufacturer has been able to eliminate the engine’s camshaft in a piston powered-production vehicle. The irony here is that camless engines are relatively easy to build. The average hacker could modify a small four-stroke engine for camless operation in their workshop. While it wouldn’t be a practical device, it would be a great test bed for experimentation and learning.

Though healthcare can be a burden for Americans of all ages, it can often constitute seniors’ greatest expense in retirement, in part because as people age, medical issues tend to creep up. As such, the financial matters that worry today’s retirees the most are:

[NightHawkInLight] a.k.a. [Ben] recently built an awesome high power air cannon out of PVC pipe. PVC air cannons are great, and everyone should build one of these at some point in their life, but what really makes this build exceptional is the valve. [Ben] created a piston valve for this cannon that can be built with parts sourced from your local home supply store. Anyone can build this thing, and everyone should.

And what about the handling? The 790 Duke steers lightning fast without betraying any signs of instability. Simply put, I could place it anywhere I wanted in a corner, and If I changed my mind, say to avoid a rock, the Duke didn’t mind at all. The Maxxis tires fitted to the 790 were developed in conjunction with KTM, and they never complained throughout my sport rides. I am really impressed.

Engine 153 from the St. Paul Blvd. Fire Department near Rochester, NY, operates this 2018 Sutphen Monarch pumper. The hosebed was designed with a walkway to permit a safe operating area for personnel when loading hose. Note the fixed steps, full height handrails and notch in the rear compartment for the supply line.

A hammer drill often looks like a traditional drill. That’s because, except for one notable function, it basically is a traditional drill. However, in addition to the standard drill’s normal spinning action, the hammer drill adds, well, some sweet hammering action as well. It uses two ridged, interlocking discs to apply a pounding force to the spinning drill. As the two discs move against each other, the ridges ride up and down, essentially creating a hammer and anvil effect inside the hammer drill. This causes the chuck to move back and forth, which provides a short, rapid hammering action to the bit.

Maybe some of the back EMF can be dumped into an adjacent valve cycle to reuse the energy. If the phasing is calculated accurately and mechanically offset this could be more efficient than a cam losing energy through friction and spring force. Could lead to some interesting cylinder configurations.

The Cougars cut their deficit to 17 points on a sweeping layup by Brooke Boretski early in the second half, but couldn’t come any closer.

The forged crankshaft has the pins offset by 75° with a 435° firing order to help mimic the sound and character of KTM’s larger V-Twins. The pressure-cast cases are a horizontal split design with the cylinders built into the top case. The cylinders themselves are sleeveless with a Nikasil coating on the aluminum cylinder walls for better cooling and weight savings.