Simon's 30"mono build

[Simon.O.]

My plan is for this one to be 30" long but we shall see once it is skinned and the nose is tipped with hardwood.

I have the ability to add a flood chamber as marked below and would like to hear if it will do the job of righting the hull.

I know that most flood chambers run further forward but I have chosen to make the hull water tight from amidships-forward, with the exception of the battery tunnel that gives me the ability to move a 4S pack to alter the Cg of the boat.

My Plan
9xl on 4S
440 prop for starters and upwards from there.

[Simon.O.]

More pics

More pics

[andym]

A flood chamber in a Wild Thing, YES PLEASE. I would love to see how it goes.

[ED66677]

Master Builder you are Simon! If you were living in France I would offer you to make a complete drive line for free for this project!
If it's light weight, and it should be as it's balsa, go for a 8XL it will be a blast!
Just a question as I'm comparing to my DF copy, did you "flaten" the rear of the Vee, at transom? Looks like you kept the same Vee angle all along the hull? not sure it's a good idea! I'd have more angle (deeper V as my DF copy) at the amidship section for "wave breaking" purpose!

[Gerwin Brommer]

hm, hopefully the volume of the floodchamber is large enough...............
Wouldn't be surprised if not.

[Simon.O.]

ED The vee is constant on this one. I used the bottom profile of the Wild thing as a design cue. The info I have picked up so far tells me to go with the vee keel, no pads, rails or rocker / hook. This will give me a "clean peice of paper" as such and I can alter or add from there.
As for wave-breaking, no-way. I am a flat water boater, although the 4S rigger screams on 1-2" ripples.

Gerwin I fear you may be right.
I'll wait and see if anyone fires me a PM with some more opinions on the flood chamber.

[Gerwin Brommer]

Why not make it larger , till the next bulkhead ?

[crabstick]

Looking good!

I will take some Pics of inside my Oval Master for you Simon

the flood chamber on that doesnt run any further forward than the hatch opening and It would right itself in about 2-3 seconds.

The other thing to consider is with the COG where It was in my OM the bow was out of the water when the boat was upside down, I actually think you might be ok if the opening in the transom is large enough, My Friend (Zero Limits) and I built our OM's together and we figured the hole in the transom needs to be roughly about 1/3 of the transom...

Lots of bathtub testing is the way we got it in the end.

[Simon.O.]

Why not make it larger , till the next bulkhead ?

The flood chamber came as an idea after the build began. The centre bulkhead is framed in such a way that even if I cut a hole there is still 4mm of hardwood strip across the bottom that would affect water flow out.
Í have a few days to decide if I want to go ahead with the FC so I'll read a bit more about them.

[Zero_Limits]

Looking good!

I will take some Pics of inside my Oval Master for you Simon

the flood chamber on that doesnt run any further forward than the hatch opening and It would right itself in about 2-3 seconds.

The other thing to consider is with the COG where It was in my OM the bow was out of the water when the boat was upside down, I actually think you might be ok if the opening in the transom is large enough, My Friend (Zero Limits) and I built our OM's together and we figured the hole in the transom needs to be roughly about 1/3 of the transom...

Lots of bathtub testing is the way we got it in the end.

Bath tub testing, frustrating times, but worth it in the end. Nothing better than a flood chamber if you’re just running for fun!

The other thing you can do to help the flood chamber work is put as much weight on that side of the boat as you can, receiver battery, esc etc. The only problem with this is if you do get any water in your boat and it stops in the middle of the pond It will sit to that side and all the water will be sitting where the electronics are, aye Matt

[crabstick]

yeah so the moral of the story is : Run a dry boat... the cause of my leak was a pinhole in the water cooling tube, I now use a electric nitro pump to pressure test the cooling system LOL

[Simon.O.]

It has been a busy morning here.
The R&D team directed the design department to make alterations to the plans.
The manufacturing shop was notified and the fabrication engineers called in to remove a portion of bulkhead to make the flood chamber run longer.
The materials aquistion officer has been fired as there is not enough balsa sheet in stores to complete the FC today.

This is where I am at now.

Oh and I too know about good tape downs and pinholes in water lines, been seen done.

[tylerm]

Looks good Simon, the flood chamber should be sweet, sweet as bro.

With the light weight of the lipo and brushless, weight placement will most likely be critical. Unlike our ovalmasters(i copied Bruce and Matt, although i think i have a larger total area due to not knowing what i was doing), which had 12 cells and 700s in them which would sink the boats further down in the water, this will most likely sit higher up on the water? So after all that my suggestion is to make the opening as close to the deck as possible. Try not to leave a lip, what i did was reinforce the whole area by bending a single stainless steel bike spoke to fit round the opening, from the bottom, up the side and round the top. Then i glued this in. Spokes are cheap, bout a $1 each. Or free for a broken one They also make GREAT pushrods.

Whew, that was more of a workout than the gym

[tylerm]

BTW Simon, are you a member of Intlwaters? If so i have some good info for you regarding the setup.

[Simon.O.]

my suggestion is to make the opening as close to the deck as possible. Try not to leave a lip,

I hear ya on the opening. I am not keen to set the top of the hole any higher as I will lose the strength in the transom. I will do some float testing before paint on this so If I really have to I can adjust the hole.

BTW Simon, are you a member of Intlwaters? If so i have some good info for you regarding the setup.

Member. PM me any link you have.

Thanks
Simon.