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CD25 props for twin HONDA 90s and WOT speed?

 
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Sea Angel



Joined: 29 Dec 2003
Posts: 734
City/Region: Virginia Beach, VA
State or Province: VA
Photos: Sea Angel
PostPosted: Tue Sep 21, 2004 11:52 am    Post subject: CD25 props for twin HONDA 90s and WOT speed? Reply with quote

Big question for the day.. after trying to find these answers thru the various threads... I must be lacking in sight tools....

1. Is the 15" pitch for the SS HONDA Prop the better setup for a moderately loaded CD25 with twin 90s, refrig., a/c, and 'stuff' for CGAUX facility work?

2. What would be the expected WOT speed, on the flat?

Sea Angel is abt to hit here for rigging and I am looking to optimize the instrumentation and cruising effeciency. Moments of truth for the pocketbook are abt to hit.

Thanks in advance and 73s.

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Art ka1rx
CBRAT #208
2005 CD25 #075 SEA ANGEL (SOLD)
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SKYPE: Art.Bartlett4
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mmitchell



Joined: 14 Sep 2005
Posts: 163
City/Region: Whittier
State or Province: AK
C-Dory Year: 2006
C-Dory Model: 25 Cruiser
Vessel Name: ShiRoz
Photos: ShiRoz
PostPosted: Mon Apr 20, 2009 12:35 am    Post subject: Reply with quote

We have the stock props (3x13.5x15) on our boat and would like to change to a 4 blade. Does any one with twin 90's have used other options. with this standard prop at WOT it runs about 5800 rpm's. Would like to increase our milage as we like to cruse at about 16-18 knots, 42-48rpm's
Any help would be greatly appreciated

Thanks,

Mark

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25 C-Dory ShiRoz 2006-sold 2012
32 Trawler Adirondack 2012-
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mmitchell



Joined: 14 Sep 2005
Posts: 163
City/Region: Whittier
State or Province: AK
C-Dory Year: 2006
C-Dory Model: 25 Cruiser
Vessel Name: ShiRoz
Photos: ShiRoz
PostPosted: Sat Feb 05, 2011 5:20 pm    Post subject: Reply with quote

We run the stock set-up and would like improve efficiency. Average 1.9 - 2 mpg on average at 16-18 mph anyone with twinns tried different options??

Thanks,
Mark
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Sea Angel



Joined: 29 Dec 2003
Posts: 734
City/Region: Virginia Beach, VA
State or Province: VA
Photos: Sea Angel
PostPosted: Sat Feb 05, 2011 8:19 pm    Post subject: Reply with quote

Hi Mark;

This is a link to Sea Angel's run curves in her album.

http://www.c-brats.com/modules.php?set_albumName=album736&id=2008_02_26_1941_37&op=modload&name=gallery&file=index&include=view_photo.php

The props I did buy were the SS 15", 4 blade. I'm very happy with the low end torque and high speed results. I also feel more confortable knowing if I hit something that the prop will survive better than an aluminum prop.

It should be noted that these SS props are not cheap, compared to others out there.

Art
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