BL Pro Boat Mini-Cat (Now the Mini-C)

[pisimi]

oh i just checked out this one to i think this one should be the one but i am waiting for someone more experience to reply.
http://www.offshoreelectrics.com/pro...prb3309&cat=75

[Diegoboy]

That ESC is a bit heavy and may be too big (size). Let me try to come up with an alternative ESC since they are so hard to come by...

[pisimi]

thx man thats alot of help.

[keon718nyc]

Mini C

Hey, Just wanted to see if you guys can give me a link to where i can get the u-joint link that will fit the stock mini c. The first thing to go it seemed was this as the 1.5mm screw stripped the plastic. also what other brushless motors will fit the stock set up that can run 7.4v-11.1 lipo's and nimh ? Any help would be appriciated...

[Diegoboy]

Pull out the straight shafts & U-joints, replace them with a flex cable.

[Dale Koblitz]

Any 380 size BL motor will fit but you don't want to get to crazy with the KV's. And by asking what works with the stock set-up I'm assuming you know you have to get a BL ESC and a standalone reciever?

[cafe00]

Hi guys, I'm new to the forum and RC boats. I race 1/5 scale cars and fly RC electric planes with lipos. The youtube video had me hooked. This is my first RC boat. I'm not toally clueless to RC stuff but have some questions on this build. I have the mini c boat already and ordered all parts on page 1 except for the hardware outrigger set.

*What kind of epoxy is good to seal the hull hole you need to make for the foam install? I'm not aware of many glues other than goop that will work on this type of plastic. I've read there is a permatex plastic welder epoxy? Is that good for this plastic? Also do I use same glue to glue in the replacement stuffing tube?

*Does the .098 flex cable fit in the stock stuffing tube? Kind of unclear from some of the replies. Also if I don't buy the mini outrigger setup, can I run the flex cable thru the stock steerable outdrive? Even with a lipo and brushless? What ultimately will happen?

TIA.

[ray schrauwen]

Hi guys, I'm new to the forum and RC boats. I race 1/5 scale cars and fly RC electric planes with lipos. The youtube video had me hooked. This is my first RC boat. I'm not toally clueless to RC stuff but have some questions on this build. I have the mini c boat already and ordered all parts on page 1 except for the hardware outrigger set.

*What kind of epoxy is good to seal the hull hole you need to make for the foam install? I'm not aware of many glues other than goop that will work on this type of plastic. I've read there is a permatex plastic welder epoxy? Is that good for this plastic? Also do I use same glue to glue in the replacement stuffing tube?

*Does the .098 flex cable fit in the stock stuffing tube? Kind of unclear from some of the replies. Also if I don't buy the mini outrigger setup, can I run the flex cable thru the stock steerable outdrive? Even with a lipo and brushless? What ultimately will happen?

TIA.

*EPOXY, I use a Permatex product from the auto section called COLD WELD. Be careful if you use ut since it sets quite fast. Treat it like 5 minute epoxy.
Always sand the area to be glued with rough paper 80 grit or so and clean with alcohol before gluing.
You can use JB Quick Weld, it is about the same as the permatex stuff. There are other epoxies but its good to go with a good name brand and from a place that turns its stock alot.
You can use the same glue for the stuffing tube or some very thick CA like Slow ZAP.
I used a new piece of tubing because the teflon fit better.

Yes you can use the stock outdrive but for brushless it depends how insane you want to make it. You don't want to have to fish it out after it flips, that a drag ....Also with brushless you may need to lube the cable more often if you are spinning alot faster.

I would try to post pictures but I'm a little busy this moment.

Of course I did this for my buddies Mini-V but, no fear the same setup will work on the cat too

Now that I fixed his boat up he is 200% more satisfied than before.

If you haven't changed the battery connector to a full size Dean, I would, seems to help alot.

You may need a new coupler that is 2mm at the motor and .098" at the flex end.

I made my own, I have a lathe.

Hope I was some help.

P.S. Don't use a Mamba BL system, at least not the motor... the ESC is o.k. (Sidewinder is cheaper). The mamba motor is too small and will overheat.

This is a nice motor, https://www.unitedhobbies.com/UNITED...hless_Inrunner

It is 24mm in diameter, not too shure if the stock motor is 24 or 28mm. If it is 28mm Steve has some nice feigao 380 motors in his online shop OSE, just click over to see them.

[cafe00]

Thanks Ray, thats a lot of help. Couple of more questions from the noob. Sorry if they are stupid :) Except for the outrigger, I have all the same equipment as Diegoboy

*what kind of lube should I use for the flex cable?
*what does the outrigger do exactly? That's for stability while turning to avoid flipping? It seems that thing could add more weight on the back which would cause the front to lift at speed and flip end over end?
*What spec lipo did you run for your buddies build? I have an extra thunderpower 910mah 11.1v but am thinking it will last a total of a minute with this setup? Does the electronic compartment get much leakage in these boats even if no flipping?
gracias,
ms

[Dale Koblitz]

Just skimming over the reply 2 your ? I didn't see an answer 2 your stuffing tube dilema. The answer is no. You'll need a 1/8" tube and of course the liner that comes with the flex cable. And b carefull when removing the old tube cuz I cracked my hull doing this step. Nothing a little marine epoxy didn't take care of though. I just grabbed the tube on the motor shaft end with a needle nose pliers and twisted till it broke loose. You'll also need 2 remove the bushings in the outdrive and replace it with brass bushings large enough to accomidate the larger prop shaft unless your using different running gear all together. I built the mini-v with a 2500kv feigao, 45amp pulso esc, and 3s lipo's turning I believe a detounged Octura x432 prop. This boat is ballistic 4 it's size. It will keep up with my moderately modded supervee if you can keep it right side up. It tends to flip or barrel roll if you give it 2 much finger upon take off. I plan on getting a micro mogli hull 2 accomidate the electronics to better handle the power. This hull is just not meant for the power my set-up delivers. Maybe a mini-cat would be much better suited being it is a cat and would have less of a tendancy to roll. Good luck! If you want pictures let me know but it's not nearly as clean as diego's old cat!

[cafe00]

For those copying this build, I found out the hard way. The flex shaft setup mentioned will not fit the bearings for the outrigger. Here is the info for what's needed from the distributor below. Also a 1/8 stuffing tube is probably better suited as well. The one listed is also too big unless you want to seal it off with a lot of shoe goo...
The bearings are for a 3mm shaft. You need to order the flex shaft with a 3mm shaft like this one.
http://www.offshoreelectrics.com/pro...?prod=mcr-mhfs

[ray schrauwen]

I found that a piece of 5/32" K&S tubing made a great bearing sleave for the strut.
It seemed loose so I put a dab of goop to keep it in place. That way an Octura flex cable system would fit nicely and then I could use any standard 1/8th" props.

Also, if you drill out a Graupner Carbon prop with a 7/64 drill bit(new bit) and then use a 5-40 Tap (from local supply store) you can thread it easily so they will go onto the shaft, just put a 5-40 locknut behind it.

[thegreat1]

hey if anyone is still looking for one of thos captain-45's i found a website today that has them in stock pm me if you want to know.

[cafe00]

OK, yet another noob question. What's the best angle of attack for the prop? Should it be deeper in water or higher up? If I angle the outdrive similar to angle of shaft - making it Deeeper in water - it seems to go slower. Is this right? i'm trying to find balance between angle and putting too much bind on the shaft. I'm running bushings and not bearings so want as little friction as possible but still as much speed as possible :)

[jfabcustom]

She may go faster when the prop gets lowered and has more Bite!

Hey Diego, do you mean lowering the whole strut, or just changing the angle?