Reply
 
Thread Tools Search this Thread
 
Old 26 September 2005, 08:46   #51
Member
 
Country: UK - England
Town: Over here
Boat name: S.S. Nobstick
Make: Three Wise Monkeys
Length: 3m +
Engine: 44lbs of thrust....
Join Date: Nov 2003
Posts: 2,115
Quote:
Originally Posted by hard1
….How can this be explained?

Boat load, Hull form, Prop size, Sea state, “driving ability”, Condition of hull “bottom”, wind, boat set-up, Constant throttle versus on-off driving, speed versus RPM, engine tune/service condition, Tide, and of course, ability to accurately measure and calculate……….
__________________

__________________
Jono is offline   Reply With Quote
Old 26 September 2005, 10:50   #52
Member
 
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Make: BLANK
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
Covered most of them but you forgot air temperature - makes a hell of a difference - engines work far better in nice cold dry weather!!!
__________________

__________________
codprawn is offline   Reply With Quote
Old 26 September 2005, 11:16   #53
Member
 
Country: UK - England
Town: Over here
Boat name: S.S. Nobstick
Make: Three Wise Monkeys
Length: 3m +
Engine: 44lbs of thrust....
Join Date: Nov 2003
Posts: 2,115
http://dictionary.reference.com/word...002/06/29.html

....
__________________
Jono is offline   Reply With Quote
Old 26 September 2005, 13:40   #54
Member
 
Hugh Jardon's Avatar
 
Country: UK - England
Town: Reading, Hants
Boat name: Juicy
Make: Sealine F43
Length: 10m +
Engine: 2 x 370hp
MMSI: TBC
Join Date: Sep 2005
Posts: 2,882
Quote:
Originally Posted by codprawn
Covered most of them but you forgot air temperature - makes a hell of a difference - engines work far better in nice cold dry weather!!!
but wouldnt cold damper weather be better still as the water vapour would help cool the charge? bit like the water meth injection on the old piston engined aircraft.........
__________________
Hugh Jardon is offline   Reply With Quote
Old 26 September 2005, 14:53   #55
Member
 
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Make: BLANK
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
Quote:
Originally Posted by Hugh Jardon
but wouldnt cold damper weather be better still as the water vapour would help cool the charge? bit like the water meth injection on the old piston engined aircraft.........
Only if you were to mess about with mixtures etc - I remember one mechanic who was time served and qualified laughing at me when I mentioned water injection - then the subaru etc started using it again.....
__________________
codprawn is offline   Reply With Quote
Old 26 September 2005, 18:17   #56
Member
 
Hugh Jardon's Avatar
 
Country: UK - England
Town: Reading, Hants
Boat name: Juicy
Make: Sealine F43
Length: 10m +
Engine: 2 x 370hp
MMSI: TBC
Join Date: Sep 2005
Posts: 2,882
Quote:
Originally Posted by codprawn
Only if you were to mess about with mixtures etc - I remember one mechanic who was time served and qualified laughing at me when I mentioned water injection - then the subaru etc started using it again.....
i guess my experience comes from the aircraft industry where 20 years ago the technology in radial piston engines was far far ahead of the automotive industry and air pressures and temperature etc affect an engine more than in any other environment and how these changes are compensated for. i specialised in aerospace engineering and learnt all about engines and how they work, air pressures, airflows, etc etc for both piston and gas turbine, was fun and comes in handy when fixing the lawnmower!!! did 10 yrs in the RAF for my trouble!
__________________
Hugh Jardon is offline   Reply With Quote
Old 29 September 2005, 06:05   #57
Member
 
Country: UK - England
Town: scotland
Boat name: Leviathan
Make: Phantom
Length: 8m +
Engine: GM Diesels
Join Date: Jan 2003
Posts: 1,437
Quote:
Originally Posted by eupa
you can then calculate how much you have left in the tank.
Jonathan
I just look at the fuel gauge when it gets down to 1/4 full, I fill it up.

Am I making this all too simple for myself? should I complicate things?....I think not.
__________________
Jonny Fuller is offline   Reply With Quote
Old 29 September 2005, 06:14   #58
DGR
Member
 
Country: UK - Wales
Town: Barmouth
Boat name: Blue Marlin
Make: Ribcraft
Length: 7m +
Engine: Yanmar 315/Bravo 2X
MMSI: 235020218
Join Date: Jun 2003
Posts: 827
Quote:
Originally Posted by Jonny Fuller
I just look at the fuel gauge when it gets down to 1/4 full, I fill it up.

Am I making this all too simple for myself? should I complicate things?....I think not.


The only way you could make it simpler is to find someone to fill it up for you (and pay) - now THAT would be useful...
__________________
DGR is offline   Reply With Quote
Old 29 September 2005, 07:14   #59
Member
 
Country: UK - England
Town: scotland
Boat name: Leviathan
Make: Phantom
Length: 8m +
Engine: GM Diesels
Join Date: Jan 2003
Posts: 1,437
Quote:
Originally Posted by DGR


The only way you could make it simpler is to find someone to fill it up for you (and pay) - now THAT would be useful...

Is that an offer? only it's showing 1/4 full at the mo!

(If you can't do the filling bit in person, cheques payable to J. Fuller please)
__________________
Jonny Fuller is offline   Reply With Quote
Old 29 September 2005, 07:39   #60
Member
 
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Make: BLANK
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
Quote:
Originally Posted by Hugh Jardon
i guess my experience comes from the aircraft industry where 20 years ago the technology in radial piston engines was far far ahead of the automotive industry and air pressures and temperature etc affect an engine more than in any other environment and how these changes are compensated for. i specialised in aerospace engineering and learnt all about engines and how they work, air pressures, airflows, etc etc for both piston and gas turbine, was fun and comes in handy when fixing the lawnmower!!! did 10 yrs in the RAF for my trouble!
I have fiddled(restored)quite a few aero engines over the years - one of my sad little hobbies!!!

An aero engineer from the 30s wouldn't really see anything that would suprise him about modern engines. Just look at the RR type R or Merlin.

Yes hot and high doesnt mean much to most people unless they are a pilot - fly into Nairobi or Mexico city and people are stunned by the difference!!!
__________________

__________________
codprawn 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 13:09.


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