Technical Issues with THT website - Props
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View Full Version : Props
Rhansom
10-12-2010, 10:07 PM
I have a Atlantic 275WA with twin F250 Yamaha's. My max rev's is 5-5,200rpm trimmed in perfect sea conditions and 40kts (46mph) top speed. My prop size is 21-T / 15.
Mates have suggested I go down at least two sizes, but looking at prop charts I'd have to change both pitch and diameter?
Anyone with a similar rig or with advice, please?
bluewaterseeker
10-13-2010, 08:56 AM
I wouldn't go down two sizes. 19's will probably raise your rpm's to 55 or 5600
Rhansom
10-13-2010, 04:50 PM
I wouldn't go down two sizes. 19's will probably raise your rpm's to 55 or 5600
Thanks Bluewaterseeker, that's closer to max rpm, so why not at least two sizes?
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