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Author Topic: exhaust port duration formula  (Read 1556 times)

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Offline jonny500

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exhaust port duration formula
« on: June 19, 2010, 11:17:21 AM »
this is not to do with a kx 500. just coldnt find a catagory to put it. im am use a book called TWO STROKE TUNING BY A. Graham Bell. i am using the exhaust port duration fomula. my problem is where he get cos(0.22553) to = 77. i thought a cosine could never = more than 1. is this a printing error or am i being stupid :? any heplp withis would be greatly recieved
regards
john
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Offline jonny500

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Re: exhaust port duration formula
« Reply #1 on: June 19, 2010, 11:18:26 AM »
.
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Offline jonny500

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Re: exhaust port duration formula
« Reply #2 on: June 19, 2010, 01:30:00 PM »
sorted, it should be inverse cosine. it is a miss print. if anyone has book look out for it
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