westbeach

But you're also running a bigger jet drive in there, right? Love the vid clip of your test in the bathtub. That rocks seeing that NDQ boat jump out of the tub like that! LOL

ryanwilson277

oh i feel dumb. i didnt know that those had tubes. sorry ((((

ok ill stop asking dumb questions

Wheelnut

My Feedback: (81)

That is insanely fast!!
A jet boat like that would be worth having.

Wheelnut

My Feedback: (81)

There are no dumb questions. Nomobux was just being helpful. I was just having a good laugh at the way het put it.

sundogz

That is right nice! Watch out prop boats, the jet drive has arrived! [X(] Thx, Sdg.

Wheelnut

My Feedback: (81)

Hey, have you guys seen the Dolphin boat? I saw it on the Discovery channel. I think it is the best thing since butter
When I first saw it, I couldn't stop thinking that it would make a nice RC boat.
In case you don't know what I'm talking about, here is the Dolphin boat.
http://www.geekologie.com/2008/07/do...t_thing_co.php
Then I found this.
http://www.bananahobby.com/1881.html

It looks about as fast as a Zig Zag, I'm sure it needs some tweaks.

DRAGONFIRE81M

yeah toysrus has one two

its called the aqua dodger from nikko

Mike writes: The unique feature of this specialty boat from Nikko is that it can dive on demand up to 12" under water for about 10 feet. That's a cool way to avoid crashes with other RC boats, bridges, and inflatable pool toys. It's 1:30 scale, has a fully functional controller with forward, reverse cruising, left/right turn, stop, and a diving function. The futuristic looking body sports a high visibility, bright neon yellow color. Ready to use right out of the box, the 9.6 volt battery pack and charger are included along with the battery for the transmitter. It comes in both 27MHz and 49MHz so get a pair for some competitive racing. This diving boat RC could be a great new summer water toy for the beach or pool. Recommended for ages 8+.

wrangellboy

Anyone know where I can get an aluminum coupling to replace the stock on? I drilled one end of mine out for a 3mm shaft and now I'm using a 2.3mm shaft. I put some k&s tube in as a shim but it's not as smooth as I'd like it to be.

I was looking at this one:
http://www3.towerhobbies.com/cgi-bin...?&I=LXTTR9&P=7

But there are no specs regarding it's size...

Wheelnut

My Feedback: (81)

well, since it's for a mini rio, I would guess it has a 2mm shaft holes. You could drill them out larger
Have a look at some of these.
http://www.offshoreelectrics.com/products.php?cat=68

Haven't most of you guys converted this to a flex cable by now?? or did it come that way already?

wrangellboy

It's pretty tight for a flex cable. There's only about 1/2" between the end of the motor shaft and the prop shaft. I would think the solid coupling it comes with would be the most efficient.

Wheelnut

My Feedback: (81)

Could I get some pics of the drive line set-up from the motor all the way to the prop? I am pretty sure there is a way for a flex cable and that would be way more effecient than a solid shaft.
Is that was it has? A solid drive shaft?

llDemonll

you cant run a flex cable IMO because it needs to have a "bearing" on each side of the prop to keep it centered in the housing. any play will be scraping on the sides and unnecessary force on the prop and will break it

wrangellboy

wheelnut, there's a pretty decent photo of the setup on page 1 of this thread. Basically though, the motor mounts straight to the jet unit, leaving minimal distance between the end of the motor shaft and the end of the prop shaft. I did see a setup where someone used a flex shaft, but they didn't mount the motor directly to the jet, they moved it forward to a custom motor mount. I'd prefer to avoid making that drastic of a mod.

Wheelnut

My Feedback: (81)

My appologies, I didn't realize it was a jet drive. That is a whole different story.

ryanwilson277

one more question...

or two....

how do you make the water pickup in the drive????

and...

will the steering rod work wth a different servo or do i need a different pushrod?

llDemonll

rod is fine just mount the servo in accordance to where the rod meets the servo arm

DRAGONFIRE81M

you can use a flext cable on a jet drive . but the mini jet drive is just two small if you plan on using the mounting flang thats on the drive .

littlepiston

My Feedback: (12)

Well im done with my jet pump, i have machined a brass coupler, center bearing housing also on the inpeller i drilled it out and made a brass bushing so that it woudnt slip. Im using a jetscreamers DF motor and a CC 35 ESC with the tunigy water cooler heat sink

goldswim5

Well I just ordered a pair of these, hopefully they'll be good, my first experience with Lipos. Now I just need to get a Radio and a charger and I'll be ready to go.

Less than $25 total.
http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWNX:IT

llDemonll

those are some super bare-bones lipo's haha

goldswim5

Haha what can I say, I'm cheap

sundogz

All looks good. Post some vids when you're up and running!


I always have reservations about lipos that have the 'burst' rate (30C) listed on the label instead of the continuous rate. Not a good policy.[sm=71_71.gif] I hope they turn out to be good ones.

goldswim5

They may very well suck, but for $25 i'll be the guinea pig. I'll keep you guys updated on how they're doing though, just in case they turn out to be good.

ryanwilson277

is there a special way to put the water pickup in the drive

DRAGONFIRE81M

i drilled a 1/8" hole in the stater housing and inserted a 1/8x1/2 " alum tubing in the hole and super glued it in place also i ground the tuding at an angel to scoop up the water has its coming out the drive