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Author Topic:   top speed
whaler 5 posted 03-20-2002 09:30 PM ET (US)   Profile for whaler 5   Send Email to whaler 5  
What top speed can I expect from a 1980 22' outrage with a 2000 OX66 200 Yamaha with half fuel and 4 average size people?
OutrageMan posted 03-21-2002 12:28 AM ET (US)     Profile for OutrageMan  Send Email to OutrageMan     
You do not say what prop you are running, but I think that you might get high 30's maybe even 41.

Brian

Clark Roberts posted 03-21-2002 07:21 AM ET (US)     Profile for Clark Roberts  Send Email to Clark Roberts     
Whaler5, try this fromula for predicted max speed in statute mph: take square root of hp/gross weight(lbs) and multiply by K (constant) where K = 180 for deep V & most big tri-hulls, 200 for conventional planing (semi-V and flat bottom and most small tri-hulls). This has proven a reliable and very accurate prediction formula for me... BTW , if you know any two of the 3 values you can determine the third.. if you know how fast a boat will go and what the hp is, you can determine the weight ...etc...etc... There is a discussion of various boat max speeds in the "Reference" section under "Performance" (Prop section I believe).. Try it you'll like it! Happy Whalin'... Clark... "Nickle Knowledge Division" of Spruce Creek Navy
PS> The above assumes that hull is straight and clean, that engine is in good tune (set-up correctly and with correct prop) and that weight estimate is correct... etc..etc..etc..
Clark Roberts posted 03-21-2002 07:22 AM ET (US)     Profile for Clark Roberts  Send Email to Clark Roberts     
Whaler5, try this fromula for predicted max speed in statute mph: take square root of hp/gross weight(lbs) and multiply by K (constant) where K = 180 for deep V & most big tri-hulls, 200 for conventional planing (semi-V and flat bottom and most small tri-hulls). This has proven a reliable and very accurate prediction formula for me... BTW , if you know any two of the 3 values you can determine the third.. if you know how fast a boat will go and what the hp is, you can determine the weight ...etc...etc... There is a discussion of various boat max speeds in the "Reference" section under "Performance" (Prop section I believe).. Try it you'll like it! Happy Whalin'... Clark... "Nickle Knowledge Division" of Spruce Creek Navy
PS> The above assumes that hull is straight and clean, that engine is in good tune (set-up correctly and with correct prop) and that weight estimate is correct... etc..etc..etc..
Bigshot posted 03-21-2002 10:34 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Guys! Get a friggin GPS and leave that crap to NASA :)
fireball posted 03-21-2002 11:21 PM ET (US)     Profile for fireball  Send Email to fireball     
For top speed in a 22' Outrage the prop is everything. With my 225 and the original prop it ran 42-44. A local drag boat friend made a 2 blade 'chop prop' for me and the boat is wicked out of the hole and runs 60 plus. Prop looks like a paint mixer you use with a drill. fb
Ready2Rip posted 03-29-2002 10:43 AM ET (US)     Profile for Ready2Rip  Send Email to Ready2Rip     
Fireball,

Are you aware of anyone that sells aftermarket "chop props?" If I could get over 50mph, I'd be "fired up!" Also, what are the specs on your new prop?

Thanks,

Mike

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