Pinellas Health News: Waterchase Apartments in Largo earn breastfeeding award | Health | 4 Inch Handle Butterfly Valve

Formula 1 engines are all camless, they use pneumatic valve actuators, so they can turn at up to 20,000 rpm (usually more like 12,000 for fuel efficiency)

Andrea Dovizioso and Marc Márquez battled once again for victory, with Cal Crutchlow a triumphant third

You hit the nail on the head. An engine spinning at 5000 rpm will fully cycle a valve 42 times per second. Typical poppet valve engines require a closed valve seat pressure of around 100 lbs. Larger, heavier valves and higher revs require much more spring pressure to overcome the inertia of the moving valve. Roller cam race motors commonly exceed 300 lbs of seat pressure when the valve is closed. That number is close to double when holding the valve open. Electrohydraulic solenoids can handle those pressures but fail to give the response needed for even at modest RPMs which is why most of the software cammed engines are low rpm diesel. I can remember International rolling out an electrohydraulic valved engine for the Pikes Peak hill climb several years ago with limited success. Electrically spun camshafts have some merit but indexing a cam with 8 valves, each with 100lbs of seat pressure, can be a tall order too. Poppet valve engines seem prohibitive to the whole concept. A non-interference design with ball type valves seems like a much better build platform and would be better suited to reap the benefits of infinitely variable valve timing aka a really wide power band. This would also eliminate some of the other rpm limitations and accuracy shortcomings inherent in the reciprocating valve system. I like the rotary piston engines for their light weight and simplicity but they have not proven themselves to be very reliable in traditional automotive applications. They are certainly RPM monsters but don’t make much usable torque until you really wind them up.

A mix of clouds and sun early, then becoming cloudy later in the day. High 41F. Winds SW at 5 to 10 mph..

I’m sorry you cannot participate in the glorious, moral societal altruism that is community disease prevention for whatever contraindicated condition you currently have. Don’t worry, others will step up and fight for you.

During his 10-year NFL career, tight end Mark Bavaro hauled in 351 passes for 4,733 yards and 39 touchdowns, most of which came during his time with the New York Giants(AP Photo)

Except the current electronics will not BLOW or otherwise damage the mechanics when they fail. Having an exhaust valve stuck closed can put way too much pressure on the exhaust cycle (turning it into another compression, but where the starting pressure is much higher than intake ending). That would instantly stall an unloaded engine. Now think a car cruising at 2000rpm, where such a cycle takes 15ms and the car has 1000+kg of inertial mass. This is another technology I will never trust, just like electronic brakes and steering (not electronically assisted….fully eletronic). You may think SW is simple, but you can do so many things (good or unintentionally bad) that you just don’t have enough time to learn everything like in mechanics and hydraulics. If anybody tells you they figured all the ways a SW can fail, it means the SW is pretty simple. PS: I work on transmission control units and I’m telling you we have all kinds of safeguards which disable the electronic control to fall back on mechanical means to disconnect the gearbox….it’s called damage control… And those are still not infailable.

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District 12 champion Bonner & Prendergast is so balanced, it’s hard to pick out a true offensive leader. From senior captain Maeve McCann to her sister Bridie, just about everyone on Prendie can shoot. Junior guard Dakota McLaughan is probably the greatest outside threat, but throw in Alexis Eagan and the Pandas have four phenomenal 3-point shooters. And any one of them — or all of them — can erupt at any time. So it’s not hard to see how Prendie shot 70 percent from the floor and rang up six 3-pointers in the first quarter during the District 12 title game, or how they completely dismantled Bermudian Sprints, 59-35 in Saturday’s PIAA opener.

So, are hammer drills different than rotary hammers? Yes, but they have similar functions. The differences between them revolve around the inner mechanism that drives the hammering action, their respective chucks, the amount of hammering force they produce, the size of the job, and the applications they can tackle. To reiterate, if you’re drilling smaller diameter holes in concrete, the hammer drill might be your best friend. If you need larger diameter holes, or if you need to demolish something, look to the rotary hammer.

“All Standard Bronze products are manufactured in North America, so tariffs or other import issues don’t threaten the supply line,” says the company’s owner, Glen Dempsey. “This peace of mind is important when planning large projects. Further, all of our products are superior in durability and quality to imports.”

Lee County 9-1-1 announced Sunday that all 911 calls made to their service were being re-routed to Sumter County 911 while officials worked to resolve the issue.