Project: MMM radioshack boat! lol
 

heheheheheheh yup! That's right! My friend got the crazy and stupid but funny and amazing idea! lol soo...today we started building and got it done!

LOOKIE!!!!

Hardest part, mounting the motor and drivetrain:
http://i31.tinypic.com/10dgq61.jpg
http://i29.tinypic.com/2cejcaq.jpg
http://i28.tinypic.com/2rqzntl.jpg
http://i26.tinypic.com/25heblc.jpg

Comparison shot of stock motor and MMM:
http://i32.tinypic.com/20740ew.jpg

Droped a Hi-Tec micro servo in the rear to turn it (also a hard part)
http://i25.tinypic.com/25ibx8p.jpg
http://i30.tinypic.com/34ypnyq.jpg

Mounted ESC:
http://i26.tinypic.com/ked7o2.jpg

Mounted receiver and sealed it from water:
http://i32.tinypic.com/a308sn.jpg

My 5s 4000mah LiPo in it:
http://i31.tinypic.com/22jj2g.jpg

All togather:
http://i25.tinypic.com/193txv.jpg
http://i25.tinypic.com/n2fifc.jpg

yea, i've got some work to do to the top to keep water out! lol

Video!!!

hopefully me and my friend can get one soon! but we are only going to test it in a pool for now. so if something goes wrong, we can save it!

at the slowest rev speed i can run it, the propeller is already spining was looks to be as fast as it did full throttle stock

:lol:

Awesome!

I have a feeling that running gear isn't going to last long! I want to see the carnage in action!

Have you done any tests in the bathtub to see how the boat sits in the water with all that gear in there?

I bet $10 on it moving six feet after something breaks with the first pull of the trigger.. :lol:

But if it does get moving good, I guess about 40mph before it flips over.

Ummm I'll guess 2.43E^12745 knots... Am I close?

prop cavitation at 1/4th throttle, boils water round prop at 1/2.

gonna be soooooooooooooooooooooooooo cool:yipi:

I used to have the same boat...

Warpspeed ahead!!!

I bet that you're right... I have tried something similar with a KB45 and a $20 ebay boat....melted the drive system and mounts..

Yes, i put it in the my dogs kittie pool to see if it would float and the back of the boat is half above water but as for the front:

http://i27.tinypic.com/2qatesx.jpg

water starts to ease up onto the top becouse it sits so low. the MMM motor is too heavy to be mounted that far up on a boat as small as that one. plus the drivetrain has a HARIBLE vibration in it at like 1/8 throttle so i'm getting out my other radioshack boat witch is bigger and wider and i'm putting it all in their and mounting the thin boat beside it to keep it from flipping (the prop on it is at like a 45 degree angle and the stock motor will flip it if the water's not very calm).

screw on some side pontoons longer than the boat like the Hawaiians. You gotta video some of this. its just funny and cool

Awesome, this should be good!

"Muay Caliente"!

love it!

haha me and my friend will def have a video camera (or at least my phone) when we test it!

thanks for the comments guys!

good news! the new boat should be much much better! plus the new boats driveshaft is 4mm thick, not 3 and the propeller is extreamly agressive and made for speed! My friend is comming over tomarrow (hopefully) to help build some more (and he has a lathe and band saw that would really help on some things. all i got in a drill)

pics so far:

http://i27.tinypic.com/qrzwpi.jpg
http://i27.tinypic.com/2llc47l.jpg

That'll work much better. Looking forward to more progress!

I'm no boat expert but I think your gonna need to get that shaft much straighter or suffer from a severe vibration ?
Looks like a fun prodject, looking forward to seeing video !
Good luck Captain.

thanks! but the shaft is strait, i just had to put all kinds of spacers (aka shock pistons and 2 lst spacers lol) on it so i could mount the motor farther back, and the free spinning spacers and what's not strait.

here you go:

http://i32.tinypic.com/2ex9ag8.jpg
http://i31.tinypic.com/of10ns.jpg
http://i26.tinypic.com/2pype38.jpg
http://i31.tinypic.com/1247l90.jpg
http://i28.tinypic.com/290u6i0.jpg
http://i29.tinypic.com/5kkm14.jpg
http://i32.tinypic.com/2igdnkj.jpg

Looks stock doesn't it???

http://i28.tinypic.com/2hi6lab.jpg

video:
http://www.youtube.com/watch?v=Jo691Iyns_U

Nice. Get that thing to a lake so you can get a top speed!

its going to need those rear wings it has when you floor that puppy

you turned a deep single prop into a surface piercing prop!! :lol:
it like moved the water from around the prop at one stage!

that thing is gonna be farkin sick!

Yeah that seems about right... Oh, and watch out for torque-spin. :lol: We don't need any mid-pond barrel rolls.

Yes we (the viewers, not boat retrievers) do!

haha that happened today, but not becouse i hit the throttle. turns out that the boat will get up to about 15mph and start hopping on the water and it you go the least big faster than when it starts to hop, it flips :yes: anyone know of any way i could keep it from hopping and jumping on the water? but luckaly we did deal it all off with duct tape that sealed it off real well! But right now, i've got to mount the motor better to keep the motor from shifting backwards and the driveshaft from comming out :wink: so that and the fact that it hops on the water is what i need to fix, untill then, i'm only able to hit 1/4 throttle constant and bump it for a split sec up to 1/3 (and it litteraly jumps ontop of the water at that point):lol:

Maybe you can make some sort of keel.

how exactly would that work?

"anyone know of any way i could keep it from hopping and jumping on the water?"

A bigger hull.

Or less power...

Cool project... gotta respect a guy trying a 454 in a canoe!

I don't think a keel is gonna help ya Dude...

The down angle on your prop, with stock power is made to push the boat up in order to plane. With so much power you are muscling it out of the water, simple as that. You either need some kind of trims (like an airplane's elevator, but applied to water) or a variable angle outdrive.... you see why this really can't work to well. Not to shoot it down either, I think it's worthy of doing, just with a different boat.

throw some weight in the front... and try that

I vote for dual turn fins... http://www.offshoreelectrics.com/pro...od=ose-506b80a :yes: Basically they stay in the water when the boat hops around and keep it from rolling.

humm....i mite try that or something similar. maybe if i mounted a peice of lexan underneath the front to keep the front out of the water keeping it from hopping?

the front end allready goes underwater when i get off the throttle :lol:

that's what i thought it mite be. maybe i can somehow move the propellerso it comes out the rear and sticks way out behind it??

first test video:

http://www.youtube.com/watch?v=Xy-26qCJaRU

I'm afraid the boat is just too small... you have enough power to easily push a 40+ inch boat around, and still have serious speed. These projects are fun, and they will show you the practical limits of power. You did a great job, I just don't want to see you waste a lot of time and effort if it's not going to do what you want it to. I would look on ebay maybe for a deepvee hull that included controls & linkages, might be able to find one pretty cheap. I know it might sorta defeat the purpose of what you are trying to do, but if you want a performer.....

And putting the prop behind the rudder will make for even more weirdness. You can try it... but I don't think it'll steer at all :lol:

Replace the whole drive shaft with a .150 flex shaft and put a proper propellor on there and you'll be able to use much more of your power, right now you're wasting too much on cavitation.

Trade up to a real boat, like a mini Miss Buddweiser :mdr: Man that would be sick with that setup. Or snag one of those old Traxxas V hulls and modify it. I'm sure you could get one of those for cheap!

hopping is called "proposing" and is caused when a submerged prop is given waayyy too much power and causes the nose to rise too far, it then walks on the prop, prop begins surface piercing and it flips over.
best bet is to move the prop further back IMO.

If he's got an adjustable outdrive or trim tabs he could also try to bury the bow better, that will keep it from porpoising as badly as well.

CHECK IT OUT

Similar project. My MMM system would mount right up to the stock mount I just can't see putting that much money with just a few mm of plastic seperating it from sudden death. I solute you! LOL

i think that the rpm level is too high for a flex shaft! lol it the drivetrain's not perfictly balanced, you hit the throttle and the whole thing feels like it's going to fly apart! :lol: i had to take the rubber dust boot off the shaft becouse it would try to fly off and it'd make the driveshaft out of balance.

true, forgot about that! :lol:

haha, that's what i was most afraid of but after it flipped the first time, i realized that it can't get fast enough to do any real damage



I wonder if it would be posible to get like 2 of the origanal caliente boat and put them togather to give me a very long, more stable boat. the first caliente boat was longer and close to half as wide as the second one that i used