1/10 Crackerbox brushless build

[venom*one]

yes that was a typo... cant wait...
First coats of paint are on... drying now...

[poobs]

I just picked up a couple of props bym Aquacraft P/N AQUB7765

They are supposed to be 30mm x 1.65 pitch

What do you guys think of these props for the Cracker box on 2S ???

[befu]

1.65 seems a bit high on pitch if it is dia x pitch. But if it is 1.65" of travel, then that is what I am running. 30mm x 1.4 = 42mm of travel or 1.65" of pitch. How about that, answered my own question.

Yep, those should work perfect. tonight the boys ran thiers again also. 2s-2200 with a 30mm x 1.4pitch (same as yours). the boats ran a nice 17mph on glass water while sipping about 12 amps at full speed. That is one nice running boat and everything is very cool when done. Not much stress for a 30A ESC or 28amp motor. Tabs were pretty level, maybe slightly down, battery all the way in back. They only flipped one boat once! Lots of potential left in the boat, but that is a fun speed for them right now.

Eagle tree graph of a couple of passes.

[poobs]

1.65 seems a bit high on pitch if it is dia x pitch. But if it is 1.65" of travel, then that is what I am running. 30mm x 1.4 = 42mm of travel or 1.65" of pitch. How about that, answered my own question.

Yep, those should work perfect. tonight the boys ran thiers again also. 2s-2200 with a 30mm x 1.4pitch (same as yours). the boats ran a nice 17mph on glass water while sipping about 12 amps at full speed. That is one nice running boat and everything is very cool when done. Not much stress for a 30A ESC or 28amp motor. Tabs were pretty level, maybe slightly down, battery all the way in back. They only flipped one boat once! Lots of potential left in the boat, but that is a fun speed for them right now.

Eagle tree graph of a couple of passes.

That is great man!! glad you guys are having fun....

I'm dead in the water - my one and only pack got bloated and I'm trying to get it replaced.
The packs from HK have not arrived.

Hey, have you ever adjusted your Mystery speed controls for proper cut off with those 2200 packs ? http://www.suppomodel.com/ESC/escmenu.html

[poobs]

My kid had a great time today. I packed the two boats and a tool box with jusy about everything we would need for the boats and drove a to a really nice pond that I'd seen.

We found a concrete structure on the shore and used it a s a base and launching point.

my Cracker box has the stock prop and Ebay Mystery outrunner. With two lipos it was plenty fast for him. After the 2nd pack we tried a 3S and shure enough he managed to flip it but the tape kept the expensive bits fairly dry.

There was a small gator in the water that kept peering out to see what the racket was.

[adamb]

What motors do you run in these? I have a 20t brushed r/c car motor in mine but would like a bit more power and brushless efficiency.

[befu]

adam, go back to the first link, I updated the motor source info on ebay since the old link was outdated.

Poobs, glad you are having fun with yours and your kid. I was going to go running today, but it was 95 degrees and humid today. Going to be a few days before I brave the heat after working in it all day.

I haven't tried 3s since I submarined it on launch. Charlie's is running much better since I adjusted the trim tabs back down. Doesn't do wheelies anymore.

Brian

[poobs]

I used the motor that befu describes elsewhere in this thread.

I really like them.

What size prop are you using with the 20T ?

[poobs]

My 3S packs are 25C and rather heavy. The crackerbox still seems to go airborne at full power.

There was a slight breeze and chop. I tried it down wind and it still felt like it would leave the water.

The same boat with nicads is fast but does not seem to leap out of the water as much.

I also ran the weird looking little boat in the pic very briefly with a 3S pack.
It was faster than the cracker box but it takes most of the pond for it to turn so I brought it back to shore...

[poobs]

Thanks Befu

My 3S packs are 25C and rather heavy. The crackerbox still seems to go airborne at full power.

There was a slight breeze and chop. I tried it down wind and it still felt like it would leave the water.

The same boat with nicads is fast but does not seem to leap out of the water as much.

I also ran the weird looking little boat in the pic very briefly with a 3S pack.
It was faster than the cracker box but it takes most of the pond for it to turn so I brought it back to shore...

[adamb]

Thank you!

[poobs]

I ran the Cracker box boat again today with my kid and two of his little friends. Everything went well until I put in a 3 Cell Li-Po pack.

It seems that the sub surface drive lifts the rear out of the water and when it comes down again it walks the back of the boat to the side and that's when it flips.

We wanted to run two boats today but I only have one TX and two receivers on the same frequency. Still, the other blue and yellow boat will take the cracker box but the Cracker box will take it on turns.