Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length.

[DickyD]

Pete the amount of prop shaft you have exposed at the rear of the hull looks to be approx twice the normal length and the props are way to far forward.

[Mankster]

I can beat that   Building a sub with 22" shafst and a 8" prop tubes. I went for a 5mm shafts and its also supported by A frames and a ball race bearing at the motor end. The motor are located as per the full sized sub.

[Pete25]

umm i wil chop a few inches of the back of my boat then so i dont have to use long drive shafts lol its the easier option i can think of lol

[portside II]

make your own shaft and two piece tube.
Where the two pieces are joined by a bush which will act as a stabilizer and stop the shaft from oscillating (wobbling) .
ten mins on the lathe should sort the job out, or 4 hours if i did it .
daz

[wartsilaone]

What's wrong with two shafts connected by a universal joint. If they are supported properly, wouldn't this work?

[Umi_Ryuzuki]

You don't need to chop the back of the boat,... just change the angle of the shafts.

Take a nice side picture of the boat, and one of us can draw on it and show you how to place the shafts.
With u-joints, with out u-joints, with u-joints outside... there are several options besides 20" shafts.

 

[wartsilaone]

I wouldn't cut the boat up.

[portside II]

Noo theres no reason to make the cut , true a 2 piece shaft would do the job with the UJ outside you can play around with the angle of the shaft that exits the boat .
Just put the profile of the hull on some paper and lay out the angles.
daz