19Ft Nemesis Cat Build

A1ex
Posts: 173
Joined: Sun Apr 23, 2017 9:51 am
Boat: 22' Nemesis Cat
Best catch: 350lb Black Marlin
Location: Noordhoek, Cape Town

Re: 19Ft Nemesis Cat Build

Post by A1ex »

More Water pics.
Attachments
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20220619_074702728_iOS (3).jpg
20220619_130700000_iOS.jpg
L Hooker
Posts: 136
Joined: Tue Apr 08, 2014 9:31 am
Boat: Tomcat 19ft 2x 115hp Suzuki 4 strokes, TTop, Raymarine autopilot Evo100, Garmin 721xs with TM150
Best catch: No particular fish!

Re: 19Ft Nemesis Cat Build

Post by L Hooker »

Well done , looking great!!
Mombakkie
Posts: 467
Joined: Mon Nov 28, 2011 6:13 pm

Re: 19Ft Nemesis Cat Build

Post by Mombakkie »

She sits very nicely, congrats on what looks to be a solid boat. Motors obviously not run in but any idea sensitivity to trim, WOT numbers, cruise speed/revs ... ?
If you think going on an adventure is dangerous, try routine .... its leathal !
A1ex
Posts: 173
Joined: Sun Apr 23, 2017 9:51 am
Boat: 22' Nemesis Cat
Best catch: 350lb Black Marlin
Location: Noordhoek, Cape Town

Re: 19Ft Nemesis Cat Build

Post by A1ex »

Hi Mombak,

She performs well with her current 17p props but for the current weight I feel like she is slightly under-propped and could easily push 19's.

Top speed we got with the 17's is 36 knots, two people and about 75L of fuel onboard but I feel with 19's we should get about 40kts as she is hitting 36kts before she is at full rpm of 6150. At 3800rpm she is doing about 23kts.
Mombakkie
Posts: 467
Joined: Mon Nov 28, 2011 6:13 pm

Re: 19Ft Nemesis Cat Build

Post by Mombakkie »

A1ex wrote: Tue Jun 21, 2022 1:05 pm Hi Mombak,

She performs well with her current 17p props but for the current weight I feel like she is slightly under-propped and could easily push 19's.

Top speed we got with the 17's is 36 knots, two people and about 75L of fuel onboard but I feel with 19's we should get about 40kts as she is hitting 36kts before she is at full rpm of 6150. At 3800rpm she is doing about 23kts.
For fuel efficiency I think the 17's are a better option, especially when running in lumpy seas or when you have a full crew. Will also require less throttle management. Very seldom are you going to run at more than 28knots. Higher pitched props will only give you better fuel numbers if you are travelling fast with a light load.
If you think going on an adventure is dangerous, try routine .... its leathal !
Wardo
Posts: 2
Joined: Fri Jun 17, 2022 3:02 pm

Re: 19Ft Nemesis Cat Build

Post by Wardo »

Lets see more pics Alex
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