JON BOAT TUNNEL DESIGN/ EXTENSION

[czuniga]

HELLO TO ALL

RECENTLY HAD A CUSTOM TUNNEL WELDED ON A 2072 JON BOAT.
HOWEVER TUNNEL HAS LEFT FLUSH WITH REAR OF BOAT SEE PICTURES. I
HAVE BEEN HAVING SOME OVERSPLASH AT TAKE OFF AND MY PROP CAVITATES FROM
TIME TO TIME. IM THINKING OF A FEW MODS TO MY VESSEL AND IM SEEKIG ANY IDEAS FROM
ANYONE WITH A SIMILAR SETUP. I HAVE SEEM ON OTHER VESSELS WHERE TUNNEL EXTENDS A FEW INCHES OUT THE BACK.

ONE OF MY DEAS IS TO WELD A PLATE ACROSS THE TOP TUNNEL . SPONSOON TO SPONSOON HOWEVER SHOULD I WELD THIS AND AT ANGLE OF SHOULD I WELD AT A 90 DEGREE SEE PIC ( OPTION A OR B

OPTION 2 IS TO JUST ESTENT THE ENTIRE TUNNEL A FEW INCHES ABOUT AROUNT THE TUNNEL,

I APOLIZGED FOT THE CONFUSION ANY HELP WOUL BE APPRECIATED.

THAKS

 

[jtf]

Have a couple pics, here one on my 1648.

 

[turbotodd]

tunnel extension works pretty good on jet drives; not so much on prop drives. You'll really want to play with it before adding an extension to your tunnel if you're using a prop. Tunnel/prop never impressed me; at least not like a tunnel/jet

 

[czuniga]

MOST TUNNELS I HAVE LOOKED AT ONLY EXTEND A FEW INCHES OUT THE BACK. IM THINKING ABOUT COMING OUT ABOUT 5 O 6 INCHES DUE TO THE SIZE OF THE BOAT.
THANKS FOR THE INFO

 

[czuniga]

will let you guys know how it turns out

 

[GSPdog7]

Look up Ott Defoe River boat on YouTube if you don’t know what I’m talking about. He has a pretty cool river boat with a prop and a huge tunnel.