up on plane

[pwgun]

I have a speedboat which appears to go very well. I have a question though. It has not got power t/t, and i appear to only use the two holes nearest the bottom of the boat. i saw in a pic the other day of a speedboat with not much more than its last quarter in th sea. ie. the nose sticking up at speed. should i use the other holes to bring the nose up? do i have a misunderstsnding of planing? would i possibley flip over with too much trim? please help the slightly confused novice.<br /><br />p.s i have 15' waverider(previously shakespear hull), with an 84 60hp johnson twin pot.

 

[crazy charlie]

Re: up on plane

the further down the motor is set,which would be the holes closest to the transom ,the better to get up on plane but this will keep the bow down when cruising.The higher the holes used will make it tougher to plane but it will lift the bow which will prevent bow steering and ride better in a chop.It depends what you are looking to accomplish and water conditions. Charlie

 

[Jdeagro]

Re: up on plane

Crazie Charlie is exactly correct. You may have electric tilt trim which will allow you to trim the motor while cruising, and also the rest pin with the various holes. The rest pin restrics the maximum down position. In this position the motor and prop will push up on the stern to give you starting lift ( better hole shot to plane) but if left in this position the lift will continue and push the bow down ( stern up/ bow down) which will cause steering issues and slow the boat. Is there a hydrofoil on the cavitation plate?

 

[pwgun]

Re: up on plane

their is no hyd on plate. i understand better now thanks, if whilst playing about though, is it possible that i could flip or does it just feel a bit dodgy(high trim full throttle).

 

[Dhadley]

Re: up on plane