Simviation Forum - Engine Swap

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Engine Swap (Read 1230 times)

Reply #15 - Dec 11^th, 2008 at 5:15pm

Brett_Henderson Offline
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Goofyfish wrote on Dec 11^th, 2008 at 4:18pm:

So I'm fiddling with the cfg file and reading more about the engine and the 130mm question kept nagging at me.
your explanation of 90x6 = 540 is perfectly reasonable to me. But the data sheet on the AEIO-540 engine is:

"Bore and stroke, in. - 5.125 X 4.375" 5.125 in = 130.175 mm

Color me puzzled...

Whoa.. slow down. How did millimeters get into this Huh

The formula for the volume (displacement) of a cylinder is: Volume = Pi x r^2 x h ... or, "Pi times the radius squared times height".

The bore (diameter) is 5.125, so the radius (1/2 that), is 2.563

2.563 squared = 6.569 times 3.141 (Pi) = 20.63 times hieght (stroke) of 4.375 = 90.26

2.563 X 2.563 X 3.141 X 4.375 = 90.26

90.26 cubic inches.... You could do the whole thing in centimeters too (millimeters / 10), and come up with CCs (cubic centimeters)..but you can't mix-n-match unit types.. Cheesy

Edit:.. For the record 90.26 cubic inches = 1479 cubic centimeters

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Reply #16 - Dec 11^th, 2008 at 6:57pm

Goofyfish Offline
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Brett_Henderson wrote on Dec 11^th, 2008 at 5:15pm:

How did millimeters get into this Huh

Because "90" was quite obviously not inches, so I made the invalid assumption that it was millimeters. Smiley

Thanks for educating me!

Let's get one thing straight. There's a big difference between a pilot and &&an aviator. One is a technician; the other is an artist in love with flight. &&&&— E. B. Jeppesen

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Reply #17 - Dec 11^th, 2008 at 8:44pm

Goofyfish Offline
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But.. what DID come out in all the reading today is that it is a dead project unless I am going to carry goatskin sacks of fuel on board with me. The larger engine needs 4.3 cu ft of space behind it where the fuel tank is. 7.5 gal per cubic foot... 32 gallons... and only a 25 gallon tank to start with.

Shocked

But I learned a few things along the way, so not wasted time!

Rick

Let's get one thing straight. There's a big difference between a pilot and &&an aviator. One is a technician; the other is an artist in love with flight. &&&&— E. B. Jeppesen

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Reply #18 - Dec 11^th, 2008 at 9:17pm