Bronco Type XXIII build

[bigdave]

Re: Bronco Type XXIII build

Well here I am changing my mind.
I have decided to add bow planes to the 23.
Not because I intend to use them but to show my Uni 2.5 system can do it with one of the slave cylinders.
Here is one of the cylinders mounted in the hull.
Also the tube the cylinder is mounted too will be used for trimming weight. BD.

[sam reichart]

Re: Bronco Type XXIII build

Dave- do you drill holes in the clear alignment tubes so water can drain more quickly?

[bigdave]

Re: Bronco Type XXIII build

Hi Sam.
Do you meant he two 1/2" Lexan tubes that help hold the front and rear together?
If so then no.
They are hollow and open on both ends.
They will naturally fill and empty very easily. BD.

[redboat219]

Re: Bronco Type XXIII build

Since it is a closed system you would not want to add any extra air.
There is no vent. You would never submerge. BD.

You could use the solenoid valve to vent the tank to the outside. Add an intake tube with a float valve to your pump chamber to protect it from flooding.

[bigdave]

Re: Bronco Type XXIII build

You may be able to do it but then you are drifting away from the KISS principle.
The system is simple and has more than enough lift as it sits.
But it comes down to the old saying "There is more than one way to skin a cat"
Sorry all you cat lovers.
It's just a saying. BD.

[bigdave]

Re: Bronco Type XXIII build

Testing the slave cylinder.

http://m.youtube.com/watch?v=CxxWYuWey20

[thor]

Re: Bronco Type XXIII build

Dave,

Could this system be adapted to a much larger boat such as my 1/32nd PIKE(72" LOA)?

[redboat219]

Re: Bronco Type XXIII build

You're right Big D. And there's many ways you can cook 'em.

Wonder how she'll behave with bow planes only

[bigdave]

Re: Bronco Type XXIII build

The bow planes are really small on the 23 so that is a good question.
I will know when I test my boat.
On any of my subs that have bow planes I usually have them on a slider control on my radio.
This way I can use them as more of a trim function and keep them at a set position.

Matt,
I have basically the same system in my 1/48 Balao hull.
I have designed the UNI 2.5 to be adaptable to different sized hulls.
The basic control cylinder stays the same but the motor changes.
There are two different sized ballast sections as well. One with a lower pressure and one with a higher pressure pump.
Using as many common parts as possible makes building a cylinder easier for me.
Hopefully I can bring the design fully to market. BD.

[thor]

Re: Bronco Type XXIII build

Dave,

That is excellent news! That's what I was hoping you would say. I won't have PIKE ready for her internals until late winter. Hopefully you will have something available that I can adapt by then? This is one of the best developments in the hobby in many years! Well done!!

How long does it take for a full dive and full surface with your 1/48th Gato?

Matt

[bigdave]

Re: Bronco Type XXIII build

Thanks Matt.

It will surface quite quickly which is a normal thing for the R system.
The dive takes longer which is how it should be.
The pump takes longer to compress and bladder air than the valve takes to empty the pressure tank.

I remember watching Skip dive a Marlin years back and it was the most realistic dive I had ever seen.
All he did was hit dive.
He had the sub trimmed out so well it was amazing. BD.

[bigdave]

Re: Bronco Type XXIII build

I made and installed some penny tubes.
These are used for adding keel weight.
I use lexan that has an ID almost exactly the same as a penny.
I can add and subtract them and move them between the bow and stern to trim the hull.
A good use for spare change. BD.

[bigdave]

Re: Bronco Type XXIII build

[redboat219]

Re: Bronco Type XXIII build

Eager to see your boat in the water. Want to learn how yours will behave as it"s without an automatic leveller.
Another builder in another well known site has trouble with his Type XXIII porpoising but this is possibly due to a faulty leveler.

[bigdave]

Re: Bronco Type XXIII build

All of the shorter boats tend to do that.
We run them at a much faster speed than the hulls are designed for (scale speed).
I think this makes them behave like flipper!

I have never run a 23 but it is quite long for its width.
Not like the 212.
But it has the oval hull like my 17B and it porpoises badly. BD.