Cruisers Forum
 

Go Back   Cruisers & Sailing Forums > The Fleet > Powered Boats
Reload this Page 1GPH at Low 20's Knots??
Cruiser Wiki Click Here to Login
Register Vendors FAQ Community Calendar Today's Posts Log in

Reply
Page 2 of 4 1 2 34
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 20-03-2017, 18:44   #16
Marine Service Provider

Join Date: Dec 2009
Location: Working in St Augustine
Boat: Woods Vardo 34 Cat
Posts: 3,865
Re: 1GPH at Low 20's Knots??
Would be about 40-50gph to get into 20s. So maybe they mean mpg in which case they are only lying by 1/2
__________________
@mojomarine1
Boatguy30 is offline   Reply With Quote
Old 20-03-2017, 18:58   #17
Registered User

Join Date: Feb 2013
Location: WY / Currently in Hayes VA on the Chesapeake
Boat: Ocean Alexander, Ocean 44
Posts: 1,149
Re: 1GPH at Low 20's Knots??
"I've run and rebuilt DDs all my life. A rule of thumb on natural 71s is a gallon an hour at maximum continuous hp."

????
darylat8750 is offline   Reply With Quote
Old 20-03-2017, 19:09   #18
Registered User
 
StuM's Avatar

Cruisers Forum Supporter

Join Date: Nov 2013
Location: Port Moresby,Papua New Guinea
Boat: FP Belize Maestro 43 and OPBs
Posts: 12,891
Re: 1GPH at Low 20's Knots??
Quote:
Originally Posted by GILow View Post
StuM would spot the problem immediately.

It was a units check failure.

Cross out hours and put in minutes (or maybe seconds) and I reckon the number sounds about right.
Or possibly cross out hour and insert mile?

1GPM is more feasible.
StuM is offline   Reply With Quote
Old 20-03-2017, 19:26   #19
Registered User

Join Date: Jan 2015
Location: SoCal
Boat: Formosa 30 ketch
Posts: 1,004
Re: 1GPH at Low 20's Knots??
My "African Queen" Volvo MD11c 2-banger uses about 1/2 gph.
I think half of that is used just shaking the engine.
Bill Seal is offline   Reply With Quote
Old 20-03-2017, 19:39   #20
Registered User
 
GILow's Avatar

Join Date: Sep 2008
Location: On the boat, somewhere in Australia.
Boat: Swanson 42 & Kelly Peterson 44
Posts: 9,155
Re: 1GPH at Low 20's Knots??
Quote:
Originally Posted by StuM View Post
Or possibly cross out hour and insert mile?

1GPM is more feasible.


Geez, I hope not. That's about what I use if I run at over 5.5 knots. If he can get that at 20 knots I am going to be very envious.
__________________
Refitting… again.
GILow is offline   Reply With Quote
Old 20-03-2017, 19:48   #21
Registered User
 
44'cruisingcat's Avatar

Join Date: Sep 2006
Posts: 9,398
Images: 69
Re: 1GPH at Low 20's Knots??
Simple typo. It's 20 GPH at 1 knot.
__________________
"You CANNOT be serious!"


John McEnroe
44'cruisingcat is offline   Reply With Quote
Old 20-03-2017, 20:12   #22
Registered User
 
StuM's Avatar

Cruisers Forum Supporter

Join Date: Nov 2013
Location: Port Moresby,Papua New Guinea
Boat: FP Belize Maestro 43 and OPBs
Posts: 12,891
Re: 1GPH at Low 20's Knots??
Quote:
Originally Posted by GILow View Post
Geez, I hope not. That's about what I use if I run at over 5.5 knots. If he can get that at 20 knots I am going to be very envious.
Geez, I get more like 1 litre per NM at 7 knots.
StuM is offline   Reply With Quote
Old 20-03-2017, 20:15   #23
Marine Service Provider
 
boatpoker's Avatar

Join Date: Nov 2008
Location: Port Credit, Ontario or Bahamas
Boat: Benford 38 Fantail Cruiser
Posts: 7,114
Re: 1GPH at Low 20's Knots??
Quote:
Originally Posted by StuM View Post
Geez, I get more like 1 litre per NM at 7 knots.
Isn't that the standard leakage rate for Detroits ?
__________________
If you're not laughing, you're not doin' it right.
boatpoker is offline   Reply With Quote
Old 20-03-2017, 20:22   #24
Registered User
 
GILow's Avatar

Join Date: Sep 2008
Location: On the boat, somewhere in Australia.
Boat: Swanson 42 & Kelly Peterson 44
Posts: 9,155
Re: 1GPH at Low 20's Knots??
Quote:
Originally Posted by StuM View Post
Geez, I get more like 1 litre per NM at 7 knots.

Hmmmm. I think our old tub is not the slinkiest sailing boat on the water.
__________________
Refitting… again.
GILow is offline   Reply With Quote
Old 20-03-2017, 20:54   #25
Moderator and Certifiable Refitter
 
Wotname's Avatar

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: C.L.O.D.
Posts: 20,436
Re: 1GPH at Low 20's Knots??
Quote:
Originally Posted by GILow View Post
Hmmmm. I think our old tub is not the slinkiest sailing boat on the water.

Hmm... a quick goggle image search turned up these:

http://1.bp.blogspot.com/_wcQ4Vhby2m...255B1%255D.jpg

https://d3lp4xedbqa8a5.cloudfront.ne...58363/6605.jpg

https://s-media-cache-ak0.pinimg.com...b7e1a6bb9e.jpg

https://s-media-cache-ak0.pinimg.com...dd86fb92d6.jpg

https://servingothersblog.files.word...11/image59.jpg

Any resemblance ??
__________________
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is online now   Reply With Quote
Old 20-03-2017, 21:23   #26
Registered User
 
GILow's Avatar

Join Date: Sep 2008
Location: On the boat, somewhere in Australia.
Boat: Swanson 42 & Kelly Peterson 44
Posts: 9,155
Re: 1GPH at Low 20's Knots??
More like this I think....
Attached Thumbnails
Click image for larger version Name: IMG_0658.JPG Views: 226 Size: 25.9 KB ID: 143598  
__________________
Refitting… again.
GILow is offline   Reply With Quote
Old 20-03-2017, 21:23   #27
Registered User
 
GILow's Avatar

Join Date: Sep 2008
Location: On the boat, somewhere in Australia.
Boat: Swanson 42 & Kelly Peterson 44
Posts: 9,155
Re: 1GPH at Low 20's Knots??
It's all the radio gear on board. It really slows me down.
__________________
Refitting… again.
GILow is offline   Reply With Quote
Old 20-03-2017, 21:24   #28
Registered User
 
GILow's Avatar

Join Date: Sep 2008
Location: On the boat, somewhere in Australia.
Boat: Swanson 42 & Kelly Peterson 44
Posts: 9,155
Re: 1GPH at Low 20's Knots??
Anyway, what the heck is with the dog?
__________________
Refitting… again.
GILow is offline   Reply With Quote
Old 20-03-2017, 22:00   #29
Moderator and Certifiable Refitter
 
Wotname's Avatar

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: C.L.O.D.
Posts: 20,436
Re: 1GPH at Low 20's Knots??
Quote:
Originally Posted by GILow View Post
Anyway, what the heck is with the dog?
Slinky seadog perhaps - I dunno but I always thought google was on top of their game.

Try https://s-media-cache-ak0.pinimg.com...36f433a5de.jpg
__________________
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is online now   Reply With Quote
Old 20-03-2017, 22:03   #30
Registered User
 
GILow's Avatar

Join Date: Sep 2008
Location: On the boat, somewhere in Australia.
Boat: Swanson 42 & Kelly Peterson 44
Posts: 9,155
Re: 1GPH at Low 20's Knots??
I am sorry to say Google is only as good as the operator. :^P
__________________
Refitting… again.
GILow is offline   Reply With Quote
Reply
Page 2 of 4 1 2 34

Tags
knot

« 1977 Kruger Passagemaker | Camargue 48 CPMY »

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Low Oil Pressure at Low Revs Streetcar Engines and Propulsion Systems 6 16-03-2012 10:07
How Often Do You Check Your Water and How Low Is Too Low ? rebel heart Electrical: Batteries, Generators & Solar 51 19-11-2010 07:50
Animated Knots bigjoe Anchoring & Mooring 4 11-02-2008 11:45
Annimated Knots GordMay Seamanship & Boat Handling 0 09-10-2005 04:48
Strength of Knots GordMay General Sailing Forum 4 05-06-2005 16:34

Advertise Here


All times are GMT -7. The time now is 23:48.

Contact Us - Cruisers & Sailing Forums - Sitemap - Community Rules - Terms of Service - Privacy - Accessibility - Top

Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
close

Privacy Guaranteed - your email is never shared with anyone, opt out any time.


ShowCase vBulletin Plugins by Drive Thru Online, Inc.