Reply
 
Thread Tools Search this Thread
 
Old 19 July 2010, 13:24   #11
Member
 
Country: UK - England
Town: Mighty Penryn
Boat name: Little Joe.
Make: Avon Searider
Length: 4m +
Engine: Honda BF50
Join Date: Aug 2005
Posts: 8,841
Quote:
Originally Posted by Kernow View Post

Your, uh, 250 Etec running OK ?
Yes, very well thanks, your XR3i?
__________________

__________________
Mollers is offline   Reply With Quote
Old 19 July 2010, 13:37   #12
Member
 
Kernow Buoy's Avatar
 
Country: UK - England
Town: Cornwall
Length: no boat
Join Date: Oct 2004
Posts: 1,518
Quote:
Originally Posted by Mollers View Post
Yes, very well thanks, your XR3i?
It's not the 'i' model, real men have carbs.
__________________

__________________
Kernow Buoy is offline   Reply With Quote
Old 19 July 2010, 15:44   #13
Member
 
Country: UK - England
Town: Reading
Boat name: Ella Rose
Make: RIBTEC 585
Length: 5m +
Engine: Yamaha 115
Join Date: Feb 2010
Posts: 19
Quote:
Originally Posted by Nickgriff View Post
Ribtec 535 (2007) Yamaha 80hp (2007)
2 People, 50lts of fuel.

@3000 rpm 13kts
@4000 rpm 20kts

These were the best speeds after playing with the trim.
The top speed is around 35/36knts (@6000rpm I think!!)

The acceleration is mindblowing, but I would rather have a higher speed at a lower RPM. Any suggestions, or is this normal?
Ok, just checked the prop, 13.25x17k. Just something to add, this was on a freshwater lake which is where the boat is used. It is an 80hp fourstroke.
__________________
Nickgriff is offline   Reply With Quote
Old 19 July 2010, 18:16   #14
Member
 
Country: UK - England
Town: Mighty Penryn
Boat name: Little Joe.
Make: Avon Searider
Length: 4m +
Engine: Honda BF50
Join Date: Aug 2005
Posts: 8,841
Quote:
Originally Posted by Kernow View Post
..... real men have carbs.
Killer carbs.
Attached Thumbnails
Click image for larger version

Name:	Funny_Pictures_2918.jpg
Views:	109
Size:	53.0 KB
ID:	52860  
__________________
Mollers is offline   Reply With Quote
Old 20 July 2010, 03:46   #15
Member
 
Kernow Buoy's Avatar
 
Country: UK - England
Town: Cornwall
Length: no boat
Join Date: Oct 2004
Posts: 1,518
That can't be me

I've sold the Red boat.
__________________
Kernow Buoy is offline   Reply With Quote
Old 20 July 2010, 11:06   #16
Member
 
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
Quote:
Originally Posted by Nickgriff View Post
Ok, just checked the prop, 13.25x17k.
Hope it's not 17k... 17" is the correct number.

FWIW, the pitch is usually selected by the WOT rpm. Select a pitch that gives you somewhere near the top end of the manufacturer's suggested max rpm range.

Playing with props differeing slightly from that will give you different mid-range and bottom end performance, but the pitch as selected above should generally remain about the same.

jky
__________________
jyasaki is offline   Reply With Quote
Old 20 July 2010, 13:47   #17
RIBnet admin team
 
Nos4r2's Avatar
 
Country: UK - England
Town: The wilds of Wiltshire
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 235090687/235055163
Join Date: Jul 2005
Posts: 12,645
RIBase
17K suggests a K series prop.
__________________
Need spares,consoles,consumables,hire,training or even a new boat?

Please click HERE and HERE and support our Trade Members.

Join up as a Trade member or Supporter HERE
Nos4r2 is offline   Reply With Quote
Old 21 July 2010, 13:03   #18
jpn
Member
 
Country: Other
Town: Cebu Philippines
Boat name: JP
Make: LianYa
Length: 5m +
Engine: Yamaha
Join Date: Jul 2010
Posts: 45
selecting the pitch when near maximum/maximum rpm range is obtained...should this be done in calm water with the motor fully trimmed out?
__________________

__________________
jpn is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 22:02.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.