CG my tunnel?

[Atious]

Am I suppossed to set the CG on a tunnel? Ya'll don't laugh at my newbie question. I'm thinking you don't as it has an outboard engine and getting up on plane with a tunnel basically means getting the hull out of the water. But.....Better to ask than wonder.

 

[waterbug]

Take the total length from the rear sponson to tip. The CG should be 30- 28 % from the rear forward. Start with it at 30% for first run then if you need to you can move it back a little at a time. If it blows off the water you went to far.

Look through the old posts and it's all there.

 

[Jimboat]

Have a look at the technical design articles on my website. Also, the Secrets of Tunnel Boat Design book will give you alot of what you're looking for in these calculations, including the formulae.