Pent-roof Combustion Chamber

Pent-roof combustion chamber

In engine design, the penta engine (or penta head) is an arrangement of the upper portion of the cylinder and valves that is common in engines using four valves per cylinder. Among the advantages is a faster burn time of the air-fuel mix. It is similar in concept to the hemi engine, both in design and purpose, but a hemispherical cylinder head is limited to only two valves without the use of a more complex sub-rocker assembly. The four-valve penta engine design was invented by Peugeot of France, to be first used in the 1911 Indianapolis 500 race. The penta engine (also termed pentroof combustion chamber) is the most common design used today[when?] by many manufacturers for four-valve-per-cylinder engines producing relatively high horsepower for displacement, for both racing engines and engines for passenger cars.

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Board roof

A board roof or boarded roof is a roofing method of using boards as the weather barrier on a roof. Board roofs can be applied in several ways, the basic types have the boards installed vertically and installed horizontally. Double board roofs were sometimes used on railroad cars. .

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Slate roof is damaged, water infiltration, but "WINDOWS?"?

Roof spread is often caused by cut roof frames made from timber that was taken to the building site, sawed and put together on the spot. Using materials that way can make calculations for the roof difficult. Solving roof spread often involves switching to a different roof construction style and material, such as a trussed roof that is manufactured in a factory and put together off-site. Or

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Solar heat collector and radiator for building roof

The Solar Heat Collector & Radiator is a heat collecting and heat radiating roof structure, designed for building roofs specifically. It was built to be used in conjunction with solar energy and uses a system of air circulation for increased efficiency. A solar heat collector, or solar thermal collector, is used today to capture solar radiation through electromagnetic radiation with the use of solar hot water panels, solar parabolic troughs, or solar towers. Today many people create their own DIY solar heat collectors, but the inventor William Goettl was the first to design and patent this technology.

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How much do the Amish charge to build a roof?

I've found the Amish to be considerably cheaper, they use better supplies and their workmanship is much better. I got 5 estimates for replacing our roof on this 100 year old home. Yeah, it's steep but not one of those with all the valleys and stuff. I threw the high and the low out immediately. Threw another one out because he was taking short cuts and when asked about it gave me a smart answer. The difference between the remaining two was about $500. The Amish quote was using 40 years guaranteed metal roofing, stainless steel screws, 2 x 4 lumber to screw the metal roof to and stainless steel snow breaks along with all the flashing and trim pieces were factory painted to match the roof and the insulation "bubble" wrap. The non-Amish quote remaining was still higher; no insulation, plastic snow breaks, plain old aluminum flashing and trim and 1 x 2 lumber. We went with the Amish quote and are extremely happy with the results! They really took their time and made each piece of trim fit properly even though this old house is anything but straight! They cleaned up all the debris and hauled it away also. And they were very nice to have around, very polite and pleasant. And they discovered our one gutter was plugged up and they cleaned it out for us while they were right there! The transformation was far better than we had expected. Not often (now days) does something exceed your expectations. The total was about $6,500 and that included 2 porch roofs and a patio roof with clean acrylic panels. We noticed that there was a good 10 degree difference in the upstairs during hot weather right away. And it does seem to be warmer but we really have not had much cold weather yet but I am sure we will be saving on the heat this year also!

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Dutch gable roof

A Dutch gable roof or gablet roof (in Britain) is a roof with a small gable at the top of a hip roof. The term Dutch gable is also used to mean a gable with parapets. Some sources refer to this as a gable-on-hip roof. A Dutch gable roof combines the benefits of both the gable and the hip roof[how?] while adding additional architectural interest. A drawback of a hip framed roof is its reduced attic space for a given roof pitch compared to a simple gable roof. In Mediterranean climates with lower snow loads high roof pitches and their greater consumption of materials and labor are unnecessary. Simple gable roofs are also problematic, as the lower low eaves made possible by a shallow pitched hip roof provide the opportunity for both shade and rain protection in the form of an overhang or latticed porch. The shade these create keeps a structure cooler, their covered space is an attractive place for relaxation and escape from heat trapped inside, and the rain "shadow" created by overhangs greatly reduces the moisture content of the soil. This inhibits both foundation decay and subterranean termites common in these areas.