I need some advice! - watertight cylinder

[uss silversides]

I received Greg Sharpe's watertight cylinder plans for Christmas, and they look really great, but I have one problem. How do I configure it to be used for a twin-screw boat?

Jonathan

[Guest]

Hi,

You have two choices,as I

Hi,

You have two choices,as I see it.

You can install two motors instead of one, which will mean modifying the original design slightly.

Or you can make a small gearbox to drive the props in counter rotation, located on the outside of the WTC in the wet area of the sub.

The gearbox will run just fine in water, just make sure you use plastic gears.

Andy

[uss silversides]

Hmmmm....... I'll have to think

Hmmmm....... I'll have to think about that. On the one hand I like the first thought, but on the other, I like the second too.

I have three major sticking points on the boat that I just haven't quite figured out yet]http://www.subcommittee.com/forum/icon_biggrin.gif[/img]

Suggestions anyone?


Jonathan

[bob the builder]

With little modification, you should

With little modification, you should be able to run the bow plane servo inside the WTC with no problems. Greg's plans are a good starting point, but there's no way that he can have it accomodate everyone's needs. If you need to, just extend the length by a few inches and put in another servo. I'm sure you can fit it in there.

The only thing I know about the battery is to put in the biggest capacity unit that you can fit. Typically you want it mounted in the bow so that the models center of gravity is as far forwards as you can get it. This will significantly help in your turning ability, as the rudders will have a larger mechanical advantage.

It sounds like you want a separate gearbox that will stay in the model, and a single output WTC. Build it for the two output shafts and have this gearing set up to stay in the model. That way you can run the WTC with a single screw in the future if you need to.

Hope this helps.

[uss silversides]

Great ideas!

With little modification,

Great ideas!

With little modification, you should be able to run the bow plane servo inside the WTC with no problems. Greg's plans are a good starting point, but there's no way that he can have it accomodate everyone's needs. If you need to, just extend the length by a few inches and put in another servo. I'm sure you can fit it in there.

You mean like parallel to the stern plane and rudder servos?

It sounds like you want a separate gearbox that will stay in the model, and a single output WTC. Build it for the two output shafts and have this gearing set up to stay in the model. That way you can run the WTC with a single screw in the future if you need to.

Sounds like a good idea! Would you mind if I try and email you a simple sketch of what I think you mean?

Thanks,
Jonathan