Largest Motor/ESC Combo In JAE Mini Sprint

[SweetAccord]

ok so which one would you advise on the outside of the ski, silicone or epoxy?

Epoxy is best!

[riversidedan]

well ya know what , the more I look at it the more am doubtful about getting it to drip inside, so will have to do with sealing it from the outside, if that makes any sense

[SweetAccord]

well ya know what , the more I look at it the more am doubtful about getting it to drip inside, so will have to do with sealing it from the outside, if that makes any sense

You drip epoxy in the inside the ski channel and let it fill in the ditch where the drive tube lays inside the hull and it will flow to the back on the inside where the shaft tube exits the back. Put in enough to reach the top on the inside of the ski and level with the hulls floor. Then let the tub lay on a flat table level it (the hull) and the epoxy will level out and cure. 30 min epoxy is what I used. Keep checking it every 3 min to be sure it's level and does not move. Once that is dry you are supposed to do the outside spot you are referring to. This will do a few things, add strength to your drive line and never move, give strength to the bottom of the hull, seal the exit side of the drive tube in the rear where it exits the hull/ski.

[riversidedan]

ok I hear ya and we gotta couple things going on Im concerned about, #1 if I dump glue in the ski its gonna be real hard to install the collect on the motor cuzz rear sponson tube is in the way Ive already tried it, but could be wrong? that means the stuff tube wont be able to move in order to put the collect on........aside from that was thinking I could just put some tape over the outside of the ski to stop the glue from dripping out, whatdoya think?

BTW I made the servo removable and is siliconed to the floor just incase "servo floor not glued in yet"

[SweetAccord]

Much better on the rudder support. You are supposed to tack the drive tube down with CA glue once it's all straight so it won't move. Use very little as a lot is not needed. Yes tape the back, take servo out so not in the way. You can do this two ways;

1. Make enough epoxy for whole channel. Pour in the epoxy and let it fill in the ski channel, start with the rear and then place hull horizontal to let the epoxy flow to the back to seal in the read ski that is deep in the rear end of the hull. Then lay tub flat and lay more in there so it's all filled in.

2. Make enough epoxy for just the rear area. Pour a little of the epoxy and let it fill in the ski channel, place hull horizontal to let the epoxy flow to the back to seal in the read ski and let that part dry. Once dry, make enough to do the rest of the ski channel, then lay tub flat and pour in the ski channel to fill in the rest up to the motor to the rear.

#2. May be easier for you, but on my first attempt I did #1 and was worried but epoxy flowed evenly front to back in one shot and came out nice. I poured front to back and went back and forth like pouring honey and it will lay down evenly I promise. Don't be scared. Just watch how much you pour in that it does not go over the tub floor level is all. Less is more in this case!

[riversidedan]

ok but how am I spose to hookup the collect/motor with the drive tube glued in??
like I said tried hooking them up but had to move the tube around, ohwell will find a way

[SweetAccord]

Install the motor, install wire drive, with collet and drive line installed, line everything up. Then tack down the drive tube. Remove everything, motor and collet. Do the above #1 or #2.

[riversidedan]

Ha, that's where I was mistaken cuzz I don't have the motor yet but now I see your point>>>>>>>>>dope slap

[SweetAccord]

Yes! LOL. You need it!! Can't really move forward then. Can't align anything up.

[riversidedan]

no motor yet and still tweaking boom deminsions to get it square but its coming along

[SweetAccord]

Looks good!

[riversidedan]

thanx man will be back with more questions BTW whats the normal AUW weight for these boats?

[SweetAccord]

Less than 2 lbs I'm sure is ideal and can be achieved. The first one was built I think is tad heavy as I did epoxy inside and out per instructions and is 1.9 lbs, 861 grams in running trim. The second one I built, and learned from the first one, built it for speed and lightness, so I did thicker balsa support bars on the inside frame, and not epoxy the inside to ease off on weight. I have not weighed it but I can easily feel and tell it's a lot lighter than the first one.

[SweetAccord]

no motor yet and still tweaking boom deminsions to get it square but its coming along

I don't seem to see the overhangs on the sponsons? Can't tell in the pic, but did you shave them even? Not per the spec again. Page 23, " Note that these overhangs don't get sanded off"

[riversidedan]

your right looks like I spaced it out , back to the shop and should be an easy fix, thanx