CG for different style boats
06-30-2004, 10:42 AM
#1
Senior Member
Thread Starter
My Feedback: (37)
Join Date: Jul 2002
Location: Ionia,
MI
Posts: 638
Likes: 0
Received 0 Likes
on
0 Posts
CG for different style boats
Hello All,
I have never strayed from building and flying airplanes before so boating is new to me, so please bare with me here. Also I never thought I would stray from airplanes, but I got bit by the boat bug after seeing them on the water....cool stuff...and not easy to get right either. Should be right up my alley!
My question is about Center of Gravity for different styles of boats, do different boats balance in different places. For example does a Deep Vee balance at the same place as a Hydro, Cat, or Tunnel.
What % do they balance at, and if different boats balance different %, what are they.
Also I know that they balance from the rear (opposite as aircraft) but do you measure from the most rear part of the hull in the water or from the prop, trim tabs, or airfoils that may be behind the hull.
Thanks for the input.
Tim
I have never strayed from building and flying airplanes before so boating is new to me, so please bare with me here. Also I never thought I would stray from airplanes, but I got bit by the boat bug after seeing them on the water....cool stuff...and not easy to get right either. Should be right up my alley!
My question is about Center of Gravity for different styles of boats, do different boats balance in different places. For example does a Deep Vee balance at the same place as a Hydro, Cat, or Tunnel.
What % do they balance at, and if different boats balance different %, what are they.
Also I know that they balance from the rear (opposite as aircraft) but do you measure from the most rear part of the hull in the water or from the prop, trim tabs, or airfoils that may be behind the hull.
Thanks for the input.
Tim
07-01-2004, 07:05 PM
#2
RE: CG for different style boats
Measure from the transom, we seem to use that as a general rule of thumb. Most of the hulls that you mentioned have the CG from 27-30% forward of the transom. Some of the newer mono hulls can go upwards of 33% that don't use trim tabs.
We can't do all of the tricks that planes do (on purpose anyway) but we seem to have a lot of fun.
We can't do all of the tricks that planes do (on purpose anyway) but we seem to have a lot of fun.
07-02-2004, 05:48 AM
#3
Senior Member
My Feedback: (1)
Join Date: Dec 2002
Location: nottingham, NH
Posts: 148
Likes: 0
Received 0 Likes
on
0 Posts
RE: CG for different style boats
ORIGINAL: Ron Olson
Measure from the transom, we seem to use that as a general rule of thumb. Most of the hulls that you mentioned have the CG from 27-30% forward of the transom. Some of the newer mono hulls can go upwards of 33% that don't use trim tabs.
We can't do all of the tricks that planes do (on purpose anyway) but we seem to have a lot of fun.
Measure from the transom, we seem to use that as a general rule of thumb. Most of the hulls that you mentioned have the CG from 27-30% forward of the transom. Some of the newer mono hulls can go upwards of 33% that don't use trim tabs.
We can't do all of the tricks that planes do (on purpose anyway) but we seem to have a lot of fun.
07-02-2004, 07:23 AM
#4
Senior Member
Thread Starter
My Feedback: (37)
Join Date: Jul 2002
Location: Ionia,
MI
Posts: 638
Likes: 0
Received 0 Likes
on
0 Posts
RE: CG for different style boats
Thanks for the input. As far as boats not doing all the "stuff an airplane will do" I have seen some very fast "loops" and maybe even something that could be call a "snaproll" so far.
Fun Stuff!
Tim
Fun Stuff!
Tim
