Scratch cat 36"

[Jesse J]

As always, I thought of taking some shots before any sheeting, but then never did. I ran out of 1/8" balsa for tonight so had to stop (right now it kinda looks like the deathstar in the Empire Strikes Back). These are made from Shockerman's plans I have up on my website for free if anyone dares.

This will run twin Proboat motors on 4-6S each and CR x442 props. This ought to allow me to approach 60mph if not give it a big !!

I will update progress as we go, and try to inspire others out there that have never built a scratch cat to give her a go. It gives you a whole new appreciation for the glass/gel coat hulls out there.

I am gonna see if I can get some resemblance of a Mystic out of this, need to round the sides, so stay tuned to see how it comes out.

[blackcat26]

Cool Jesse! I was thinking of a build like this in either the 36" or scale that one up to 45". You gonna glass over it or marine ply?

[Jesse J]

right now it is 3/32" ply formers with 1/8" balsa. I will then cf the inside tunnel and motor mounts and then glass the outside and probably deck with the heavier glass. I want it bullet proof rated for 80mph, even though I am shooting for 60ish.

Lemme know if you wanna scale up, I can help ya.

[shockerman80]

boat looks good i would probably fiberglass it if i were you. I have an updated design ive been working on of this boat that im currently at the same place as you with. ive relocated the steps raised the rear deck to give it a little more room inside and majorly changed the tunnel. I changed alot of this stuff so she runs alot better in rough water as i live on the shores of lake erie. Glass water is in short supply here unless i run in ponds.

[Jesse J]

that is great Alan, I would like to try this revised version once you get a prototype or two out in the waves. I am super happy with even this version - looks AND handling! I will be working with the transom area to approximate the more tapered Mystic design that I so love - the rear end is one of the most important parts for me!

Yes will be glassing the exterior - a buddy and I were talking about some motor hatches for the twinskies - need to be able to get in there and move around. At 36" there is A LOT more room to work with inside there now.

[shockerman80]

i am changing the rear to narrow it as well to replicate the mystic style.

[Jesse J]

Hey Alan (or anybody!), Do you have a good place to get/make the drives for this? Any less ridiculously expensive option would be interesting.

I am looking at the ones at MHZ and for $270 a pair I have a hard time selling a whole boat for just the drives on another... But, they are absolutely gorgeous...



I am thinking of this rudder too ($115).



AND a paint scheme of the Platinum Princess.

[blackcat26]

Hey Jesse, what about those from tough racing? They are the ones pictured in those plans...

[Jesse J]

ya, but they are still $118 each! unless you know of a better line on em...



they don't have any specs on em and the transom mount is larger footprint.

thanks for the idea, will keep it in mind.

[blackcat26]

I was actually thinking of these that you have recommended to me before. Not as cool but cheaper.

[Jesse J]

.............. well I have a pair of $25 ones that look pretty similar, but this is the "Platinum Princess" and if I have to sell a boat to have scale drives then I will. I see what you mean, and I appreciate the clarification bro. Also, if you notice the footprint is even bigger. I need to get the shafts to exit as close to the tunnel as possible. The farther apart, the more difficult the turning at speeds, or so I have found with the Twintruder.

[shockerman80]

i have speedmaster stingers in my 42 inch mti that work awesome and are pretty easy to adjust. ive also used the older sv27 stingers with good success on the 36" mti i built. All you need to do is make a box into the bottom of the hull for the higher parts. I really cant see spending that kind of money for drives on a model boat. If i ever built twins again i would without a doubt use the speedmaster stingers.

[Jesse J]

how do you adjust the speedmaster stingers with the overhang?

I can see using the SV27 stingers, maybe black ones or painting them black and making a fake support.

[shockerman80]

ask and ye shall receive. this is the way i do it. They are brass plumbing fittings with allen head set screws epoxied into the hull. its a tapered thread so that as you tighten down they seal themselves. Simple quick and easy.

[shockerman80]

some more pics of the same setup