Help me choose motor/esc for this boat

[tlandauer]

If the silicone tube is "squeezed" a bit where it enters the hull, you don't need to worry too much, chances are that there will be no leak.
I assume that there is a flat spot on your motor shaft, that's really important. I hope there is also a flat spot on the shaft as well. Use medium strength thread locker on all these spots. You don't want to strip the threads by over tightening these set screws. Also when you take the shaft out for maitainence, you have to make sure to re-apply the thread locker. ( U-joint--shaft side)
Your method of securing the ESC is fine.
Looks real good!

A tip: Get yourself an eye-drop bottle and but some heavy motor oil , I mix 10w-30 with STP High Viscosity Oil Treament ( oil additave sold at Auto supply shop. 50-50 mix) , this will come in handy when you pull the shaft out for ludrication. For this type of shaft, I find it is better to have heavy oil than grease, for one thing it's difficult to get grease in the tube having to pass the bushing. Unless you have this grease gun: sold at Horizon Hobby;http://www.horizonhobby.com/products...0B#t4-OPTIONAL
For the applcation of oil, this will work :http://www.rockler.com/workshop-glue-injector-3-pack

[corsara]

Hi Tlandauer,

Thanks for the tips. I read your message early in the morning right before I did the first test. Btw, yes, both the motor shaft and the shaft have flat spots, and I've made sure to align them perfectly with the holes before putting the set screws. One thing I didn't think of is to use thread locker, which is strange since I use threadlocker religiously on my motorcycles. Speaking of which, I suppose Loctite Blue will be a good choice, it is medium strength?

Regarding the lubrication---I got the Pro Boat Grease Gun (http://www.offshoreelectrics.com/pro...rod=dh-prb0100), and I used that to lube the shaft really well. I like your idea about having the motor oil mix though, I might try that out later. (looking at your link, seems like the grease gun you linked is the same as what I have).

Now on to my test report:

My pool (18 x 36 feet) is obviously not enough to test performance and other properties, my goal was to make sure it floats, and no water gets inside. Btw, sorry, didn't make a video as I couldn't find where my wife put the camera extra battery and charger, but when I go to the lake soon, I'll make a video for sure.

I gotta say---lol, what a monster! I didn't try any of the extra props I bought (CF that screw to the end, which will make the prop stand too far out, gotta think how to try those). Even on 2S battery, I couldn't get more than just fractions of the second on the throttle before letting go not to hit the wall. I turned over the boat by hand, but obviously (as you mentioned very early in this thread), I need to have some weight on the port side, because like this it just sits upside down. I also tested going backwards. Also pushed with my hand the hole boat underwater for a second. When I opened her up (used hockey tape for the hatch), there wasn't even a single drop of water inside! Such a relief!!!

Basically, I feel excited like a little kid (which I'm not, mid thirties and two kids). Spoke to my wife, as soon as the u-joint coupler arrives and I pick up the big battery, we're going to the lake. Just need to pick up a fishing pole and see how to attach a tennis ball to it. Worst comes to worst, I have one of these: http://www.amazon.com/Intex-Seahawk-.../dp/B006IXB73C

I'll be posting a video when I go to the lake. Btw, you were right---no water went in through the cooling tube hole :D

[corsara]

Alright guys, today we finally went to some pond to try the boat. It didn't go well, and I'm not sure if it's because it's my first time driving such a boat, or because of something else. You can see in the video below. Am I supposed to gradually let go off the throttle when I want to slow down? Cause I let it off completely, and that's when it went down. Also, the pond is small, so I never even pulled the trigger all the way in (except at the end I guess..). The end result was a missing propeller and shaft end (lesson: use thread-locker next time for the shaft end), and also the u-joint got disconnected from the shaft after the crash (I used blue loctite on the set screw, but I guess it wasn't tightened enough?!). Anyway, here it is:

[capnswanny]

Hehehe....I love how the kids help by throwing rocks at the end of the video :)
Gotta love 'em!! :-P