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RE: Prop / gear ratio / HP / fuel consumption / speed  Ron Sheridan
 Aug 13, 2007 13:05 PDT 

Scott,
this was YOUR QUESTION; 4 years ago!

It and others were answered absolutely...in depth.

You asked me not to feel that your blast was personal.

It was a Blast and Yes, it was personal when you say directly, RON!
then challenge the HP statement I made.   YES, it was personal and
Scott, while we remain friends and I hope will, even as a friend, I will
defend all that I have said on this list as all.. was well thought out
and I therefore stand by it all.

Gail D Penfield wrote:
 
Good evening,
Anyone out there in cyberspace giving this info out to Pete & Don would
you
please include us in the answer to this post. Chanticleer moves along
at
4.9 at 1800 RPMs with our Perkins 4-154 and the Borg Warner trany and
about
5.3 at 2100RPM. I know the ins and outs of certain type props has been
discussed before. Regardless, we would also like to know what kind of
performance others are getting. Thanks
Gail & Scott Penfield
Chanticleer WO 134

-----Original Message-----
From: Don Stoughton <ddstou-@adelphia.net>
To: pet-@comcast.net <pet-@comcast.net>
Cc: cs-@topica.com <cs-@topica.com>
Date: Wednesday, October 01,:38 AM
Subject: RE: [CSY] Prop / gear ratio / HP / fuel consumption / speed


 Pete,

I'm a little slow in my response, but am very interested in the subject.
My boat is a 44 walkover, hull #114 launched in November 1978. I am the
original owner, but it was in charter service in Tonga for seven years.

The engine is the original Perkins 4-154, rebuilt in 1999.

Unfortunately I don't know the gear ratio since I have lost the original
manual, but the transmission is the original.

The prop is a feathering Maxprop, 3 blade, 24 inch dia., presently
adjusted to a 13 inch pitch.

I cruise at 2100 RPM with a flat water speed of 6.9 knots. Fuel
consumption at cruise speed is approximately 1 gal/hr.

Maximum RPM out of gear is 3000. Max. RPM in gear is 2600. This is of
concern to me, but I have been running it this way for the past two
years.

The flat water speed at Max RPMS (2600) is 7.3 knots.

I will be hauling the boat soon for bottom paint, and am considering
returning the pitch to 11.2 inches to reduce strain on the engine.
Assuming I can thus increase the RPM's under load, and cruise at a
higher RPM while being kinder to the engine. However, will I still get
6.9 knots and use only 1 gal/hr at 2400 RPMS? I love my maxprop for
the feathering under sail and the good bite in reverse, but I wish I had
the new type that can be adjusted underwater. I'm looking forward to the
results of your inquiry, and any experienced advice I can get.

Regards, Don Stoughton "Stargazer"



-----Original Message-----
From: Pete Schmidt [mailto:pet-@comcast.net]
Sent: Thursday, September 18, 2003 6:11 PM
To: cs-@topica.com
Subject: [CSY] Prop / gear ratio / HP / fuel consumption / speed

Greetings all,

I dug thru the archives of this list looking (unsuccessfully) for prop
size
vs. transmission gear ratio and resulting speed and fuel consumption for
a
CSY44. If folks will reply to me with the following information, I'll
compile and post it in some sort of sumarized table format for all to
see:

Boat name

Engine HP / model
Gear ratio
Prop size (dia x pitch) and type (# blades, fixed/folding/feathering)

Cruise RPM
Cruise speed
Fuel consumption at cruise RPM

Max RPM (WOT)
Max speed (if you've got it)

Thanks!
-Pete
pet-@comcast.net
CSY44 W/O "Imagine"



http://memoryrose.blogspot.com
http://csysailboats.blogspot.com
http://ron-sheridan.blogspot.com
S.V. MEMORY ROSE, PILOTHOUSE KETCH, #2
	
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