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08-03-2005, 08:51 PM
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#1
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Registered User
Location: midlands
Occupation: anything and everything
Interests: to busy working
Boat name: yellow boat
Boat make: seaquel 600xs
Engines: yamaha 200 pro v
Cruising area: south coast when get chance
Join Date: Mar 2005
Location: midlands
Posts: 137
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how fast
can anyone shed some light on what sort of speed i may get out of my yam 200 prov with 21" prop please
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08-03-2005, 09:00 PM
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#2
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Registered User
Country: UK
Location: Weston Super Mare
Occupation: Electrical Engineer
Join Date: Mar 2004
Location: Weston Super Mare
Posts: 6,351
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If the sequel is a light boat a 21" may be alittle on the small side but i recon you should see at least around the 60mph
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08-03-2005, 09:04 PM
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#3
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BananaShark Member
Country: UK
Location: Salcombe South Devon
Occupation: Racer and builder
Interests: Winning races
Boat name: BananaShark
Boat make: BananaShark 34' Race
Engines: Twin Yanmar BY 260's
Join Date: Mar 2004
Location: Salcombe South Devon
Posts: 4,638
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It depends on the gear ratio of the gearbox as well.
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Cookee
British Champions! RIB Formula 1 2005
National Speed Record Holder at 90.15 (still)
www.bananasharkracing.com
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08-03-2005, 09:04 PM
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#4
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Registered User
Join Date: Mar 2004
Posts: 5,724
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Re: how fast
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08-03-2005, 09:06 PM
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#5
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Registered User
Location: midlands
Occupation: anything and everything
Interests: to busy working
Boat name: yellow boat
Boat make: seaquel 600xs
Engines: yamaha 200 pro v
Cruising area: south coast when get chance
Join Date: Mar 2005
Location: midlands
Posts: 137
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so what would be a better size prop to use
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08-03-2005, 09:08 PM
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#6
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Registered User
Join Date: Mar 2004
Posts: 5,724
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Quote:
Originally posted by lobbers
so what would be a better size prop to use
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two bladed Seagull prop..........worked a little
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08-03-2005, 09:10 PM
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#7
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Registered User
Location: midlands
Occupation: anything and everything
Interests: to busy working
Boat name: yellow boat
Boat make: seaquel 600xs
Engines: yamaha 200 pro v
Cruising area: south coast when get chance
Join Date: Mar 2005
Location: midlands
Posts: 137
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08-03-2005, 09:14 PM
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#8
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Registered User
Country: UK
Location: Weston Super Mare
Occupation: Electrical Engineer
Join Date: Mar 2004
Location: Weston Super Mare
Posts: 6,351
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Quote:
Originally posted by lobbers
so what would be a better size prop to use
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Whats your gear ratio?
what rpm is peak power on your engine?
how high you running? i.e where is your prop shaft in relation to the bottom of your transom?
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08-03-2005, 09:22 PM
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#9
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Registered User
Location: midlands
Occupation: anything and everything
Interests: to busy working
Boat name: yellow boat
Boat make: seaquel 600xs
Engines: yamaha 200 pro v
Cruising area: south coast when get chance
Join Date: Mar 2005
Location: midlands
Posts: 137
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not sure of any of that just brought engine cos looked good and prop is about 4ft away as not fitted it yet wanted to get as much info as poss before so to get it right when fitting it
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08-03-2005, 09:28 PM
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#10
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Registered User
Country: UK
Location: Weston Super Mare
Occupation: Electrical Engineer
Join Date: Mar 2004
Location: Weston Super Mare
Posts: 6,351
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if it the same sort of spec as a 200 merc with 1.87:1 gears and you are looking for top speed thus sacrificeing a little on pull out by mounting the engine high you may see the magic 70mph but you may find you need around a 23" prop to keep the revs down but best thing to do is find out where peak power is then run it with what you got and see what revs you get flat out then prop up or down accordingly.
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08-03-2005, 09:34 PM
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#11
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Registered User
Location: midlands
Occupation: anything and everything
Interests: to busy working
Boat name: yellow boat
Boat make: seaquel 600xs
Engines: yamaha 200 pro v
Cruising area: south coast when get chance
Join Date: Mar 2005
Location: midlands
Posts: 137
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ok thank i,ll have to see how she goes know where there is a 4 bladed phirana 24" prop
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08-03-2005, 09:37 PM
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#12
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Registered User
Join Date: Mar 2004
Posts: 5,724
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Quote:
Originally posted by lobbers
ok thank i,ll have to see how she goes know where there is a 4 bladed phirana 24" prop
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Feck off! :hot:
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08-03-2005, 09:49 PM
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#13
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Registered User
Location: midlands
Occupation: anything and everything
Interests: to busy working
Boat name: yellow boat
Boat make: seaquel 600xs
Engines: yamaha 200 pro v
Cruising area: south coast when get chance
Join Date: Mar 2005
Location: midlands
Posts: 137
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now thats not being very sporting is it
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08-03-2005, 10:40 PM
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#14
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numbskull
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast
Join Date: Mar 2004
Location: South
Posts: 15,959
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I think the Yam's are lower revving than Merc's, topping at summat like 5500
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"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
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10-03-2005, 08:02 AM
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#15
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Registered User
Country: UK
Location: Weston-super-Mare
Occupation: Engineer
Boat make: Sunseeker Thunderhawk 43
Engines: Mercruiser 502s
Cruising area: Lyme Bay
Join Date: Feb 2005
Location: Weston-super-Mare
Posts: 86
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Running a Yam Pro V 200 on the back of a Ring 21E with a Yam 23" prop & getting just under 70mph @ 5800 rpm.
Have tried a couple of 4 bladers & gain on pull out but loose a couple of mph at the top end.
Not sure how the weights of the boat compare though.
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10-03-2005, 09:06 AM
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#16
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BananaShark Member
Country: UK
Location: Salcombe South Devon
Occupation: Racer and builder
Interests: Winning races
Boat name: BananaShark
Boat make: BananaShark 34' Race
Engines: Twin Yanmar BY 260's
Join Date: Mar 2004
Location: Salcombe South Devon
Posts: 4,638
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If you put all the data into this - speed calculator you will be able to work it all out!
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Cookee
British Champions! RIB Formula 1 2005
National Speed Record Holder at 90.15 (still)
www.bananasharkracing.com
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10-03-2005, 02:59 PM
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#17
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Registered User
Country: uk
Location: Lincolnshire
Occupation: RAF
Interests: Anything Fast and Wet !!
Boat name: Thunderbirds
Boat make: Argo 21, Sourcerer
Engines: Merc 200hp, Merc 25hp
Join Date: Dec 2004
Location: Lincolnshire
Posts: 231
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i was running my yam 130 at 6400 no problem this year after cutting the rev limiting cable.
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10-03-2005, 05:30 PM
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#18
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Le Cat
Country: France
Location: Paris
Occupation: Computer Sales
Boat name: Le Cat
Boat make: Argo Cat 18
Engines: Mercury 2.4EFI
Cruising area: Paris
Join Date: Mar 2004
Location: Paris
Posts: 753
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Isnt there a speed calc out there with boat weight ? It definitly has an impact on speed.
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11-03-2005, 09:24 AM
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#19
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BananaShark Member
Country: UK
Location: Salcombe South Devon
Occupation: Racer and builder
Interests: Winning races
Boat name: BananaShark
Boat make: BananaShark 34' Race
Engines: Twin Yanmar BY 260's
Join Date: Mar 2004
Location: Salcombe South Devon
Posts: 4,638
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No because there are other factors involved such as hull design. The prop calculator will give you a maximum possible speed or if you know that the amount of slip but that's all.
__________________
Cookee
British Champions! RIB Formula 1 2005
National Speed Record Holder at 90.15 (still)
www.bananasharkracing.com
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11-03-2005, 09:52 AM
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#20
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Traveling
Country: UK
Location: Alderholt
Occupation: Aerospace
Boat name: T/T D2S
Boat make: Midas 27' Cat, Argo 16 Cat. Avon Rib Thingy
Engines: Merc 280-ROS -JSRE,65Xs, 75 Stinger, Yam 60
Cruising area: Any Seedy Bar
Join Date: Sep 2004
Location: Alderholt
Posts: 4,225
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Quote:
Originally posted by FrenchPhil
Isnt there a speed calc out there with boat weight ? It definitly has an impact on speed.
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Correction is made under the slip of the prop,
identical set ups but with differing weights will have differing slip percentages.
There are a lot of questions on props must post my excel spredsheet. er Damm!! must make it a zip first !!
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