Mini Hydro

[boater76]

Got the holes drilled for the strut, rudder and antenna holder. I need to drill hole for water exit and turn fin. Do I mount the turn fin vertical or at an angle?

[REBAR]

Depends on the style of fin. Got a pic?

[Jesse J]

You probably don't want much more than 10deg angle. If possible, make it adjustable, the more the angle, the more it hooks in the turn, try different angles. I have experimented a little and found 5-10 deg works good, but I agree with Rebar, need pics to see if it is curved or hooked already.

[REBAR]

Id mount it vertical then modify the fin to what you need.

Heres the style I use.

http://www.jrcbd.com/showthread.php?t=5343&page=6

[Jesse J]

That's puuurdy! I like a lot. looks like good surface area, did you polish on purpose?

[boater76]

I have to get a fine yet. Will post when I do.

Ken

[boater76]

Would that angle be inward toward the hull or away from it?

[REBAR]

That's puuurdy! I like a lot. looks like good surface area, did you polish on purpose?

Not mine. But mine look the same.

Toward the hull boater 76

[Jesse J]

Yep, just like a "7" looking from the back of the boat along the bottom.

[boater76]

Well if you are worried, you could reinforce the inside with fg, but don't know if really necessary.

If I coat the inside of the hull with expoxy would that help and be sufficent so I would have to cf or glass it more? Or would it be wiser to use cf?

[REBAR]

Epoxy wont make it stronger. You need some fibers in the mix. Either FG or CF if you think the area is weak. Can you even reach the back or inside of the right sponson?

[bustitup]

Epoxy wont make it stronger. You need some fibers in the mix. Either FG or CF if you think the area is weak. Can you even reach the back or inside of the right sponson?

if I am not mistaken just epoxy WILL add some strength....yes adding fg or cf will be MUCH better but epoxy by it self will add some rigidity and strength

in fact I have read that if you have a hull that is famous for coming apart at the seam then you should take deluted epoxy and put it in the hull and "roll" the hull around on its seam like a big clock and let the epoxy flow over the inside seam .......that this helps

[Jesse J]

Yeah, I was picturing a thin strip of glass cloth - we are talking about the tunnel floor just at the transom, yes? This was referring to the question about removing the hump (which I still don't quite understand why it was there in the first place). I reckon this could be done for the turn fin, but with a boat of that mass and the small surface area of the fin, I don't think it would be necessary (my opinion without seeing this one) What I did to my minicat hydro was to add a 1/8" piece of ply with blind nuts for the fin screws. This allowed me to reinforce it and not have to worry about having my nuts come loose and fin come off.

[boater76]

I just put up a thread about glassing. Also I took out the hump. How should I go about filling the void in with glass after I get the stuff tube setup?

[Jesse J]

I would put a piece of tape across the sanded and perfectly flat bottom on the outside. Then on the inside fill the void with epoxy and along the inside where you can spread out the glass, maybe an inch wide by 3 inches long.

Then take your glass and use a cheapo brush (probably the same one you used to spread the epoxy) and push the glass down into it so the epoxy oozes up through and let cure. You can add another thin layer of epoxy if you want but you want this operation to add as LITTLE weight as possible.

when all cure, remove tape and you should have a nice flat base and and even stronger hull.