Darin's Top Speed 2 FE Conversion...

[Stinger9D9]

anybody know where to get the mount? looks perfect for my next build

Check way back on post #48 of this thread.

[TRUNKMUNKY]

It was mother's day and after taking mom out to dinner she spied the boats already loaded in the back of the truck and asked to go with me to run them.I was like,you really want to go run boats?Instant camera man,and she was really curious as to the tech part of the whole thing,so I let her run the camera and explained the basics of rc boating as I went along,being a retired scientist from Corning,she quickly grasped the concept and was having as much fun as I was.Amazing woman for sure.I can see why dad married her.I raised up the motor quarter inch above recomended height and had much better handling as a result,ran cooler too.http://www.youtube.com/watch?v=3S7kvSJLiJU

[Stinger9D9]

Wow, so that's 3/8" above the bottom of the sponsons? I never would have thought to try it that high.

There's no denying that it's running well in that video though.

I installed my threaded inserts too low. I'll have to add another set of 4 just above them to get the lower unit any higher. It is doable though.

[Stinger9D9]

Ok, well here are the changes:

- moved the motor up until the prop shaft was 1/4" above the bottom of the boat
- changed the motor...I'm pretty sure the used SV motor I picked up a while ago on the Swap Shop forum was bad (after the puff of smoke that came out of it)
- changed to a detongued X642 prop
- re-peaked the packs (they are still a bit flat from sitting around all winter)
- increased water pickup diameter and tygon tubing all around

Now the results:

It ran a TON better, MUCH cooler, just a bit too slow, and way too wet. Although the CofG is exactly 9 1/2" from the stern, it runs like it's nose heavy. I haven't trimmed the motor up at all yet.

Also, it hooked pretty bad in the turns despite the fact that it has recovery pads.

In all though, it was a successful (though unexciting) trip to the pond, and, like I always say, I'd rather be bored than frustrated.

[Darin Jordan]

Guys... Just like any other hull-type running a surface drive setup... the boat is going to attempt to run down the centerline of the prop... Therefore, the deeper you run it, the "looser" the back of the boat will get...

In other words, when you lower the drive DOWN, you raise the hull up out of the water more... Conversely, when you raise UP the drive, you lower the hull in the water...

Your TS-2 should run really well with the drive about 1/8" or so above the setup board, with a slight angled up shaft angle. This is assuming a 42mm or so prop...

It'll be a little loose, but then, this is a tunnel... it's not suppose to run tight, but rather on the very backs of the sponsons...

Don't try to get all of the nose up using the lower unit angle... It should air out well at speed... Too much shaft angle will cause it to bounce at speed....

Expect about 38mph or so from a well tuned setup that can actually be raced through the turns.... Like I said, it'll be loose... you'll have to drive it... but that's about what you'll get...

[Stinger9D9]

Thanks Darin,

So back when I ran it the first time out (with the motor much lower...maybe too low) it probably ran so poorly because of a combination of a bad motor and flat cells (first time out after winter).

Here are some pics of today's run:




Also, here's a video of today's run:

http://www.youtube.com/watch?v=0delTLbB5VU

You can see it hook in the corner when it comes in close. It hooked a bit worse farther in the distance. It's also running really wet, but with the windy conditions, that was probably a good thing.

I also found that the servo is too weak (wouldn't readily pull out of turns at times), but that's an easy fix.

So next time out, I'll drop the motor down to 1/8" above the board, and angle the motor up about oh...say 2 degrees?

[calcagno45]

What servo were you running? as far as torque?

Looks good tho!

[Stinger9D9]

I was just using the servo that came with the Hitec FM radio...an HS-322. I didn't expect much of it.

After reading back a couple of pages of this thread, I'm going with Darin's advice of a Hitec HS-645MG. It'll be a direct replacement, and since it's equivalent to what the nitro guys use, it'll do the trick just fine.

[calcagno45]

Looks great! Nice action pics too!! Digital SLR?

Ok. I have pretty much the same, Hitec 325, thats I was intending on using. I guess I'll change that option out.

I have a 28" MRP Tunnel hull that I'm building for scale looks. I'm painting up and stickering an Aquacraft EP1 to look like a Merc 300 o/b. (maybe 2.5 instead) to use on there. I am using the SV27 motor/controller in it. I know the EP1 might not have the same performance as the REK o/b but I'm going for scale looks, (that first impression of D@mn!).

[Stinger9D9]

Well, at least it doesn't sink...

I took the boat out a couple of times this weekend. The first time with the prop shaft at 1/8" up, and angled at 1 degree. It ran well enough, just still a bit slow.

The next day, I angled the motor up to 3 degrees, then slow charged (1/10C) up 13 IB 4200 cells (I had a single "booster cell" wired up). The boat took off across the pond well enough, I turned it back toward me, and as soon as I went to turn in front of me it hooked, but now with the speed it had, it flipped.

I wasn't sure if it would stay afloat, and was preparing to watch it sink away forever. (I will never swim after a boat). The good news is, it floats great upside down, the bad news is, the receiver got soaked (the ETTI esc is crazy waterproof, so it was fine). The trip to the pond was over in about 1 minute and I never got a decent chance to see how it ran.

My real question is this video:

http://youtube.com/watch?v=kfEg7NWz5lw&feature=related

Is this guy really hitting 40 mph with only 3S? I know it looks like it could be 40mph, but the question is, is this possible with the setup he is describing? It doesn't seem like he'd get the prop speed needed.

[TRUNKMUNKY]

I like to be able to turn my boat,I guess if I just wanted to go as fast as possible I'd just throw the biggest motor on there I could find and a hv esc, crank the motor down, and get ready to go fishing alot.Anyone notice how some of these tunnel hulls are nicely bowed on the bottom,makes setup fun.I started keeping a setup logbook for my boats,with cause and effect.I found what works for some,didn't always work for me,and vise versa.

[ice329]

This thread is responsable for me needing to do a TS2.... I saw Darin doing one and needed one to. I finally finished or should I say refinished it. This time I think she is right. First time around I had to much weight forward and could not adjust it and the servo was not strong enough and I did not like how the stearing was set up. Took care of all of that and also put a better jack plate from the capt. Thanks to a few people on this forum for info and parts, I finally finished her again. I will be giving her a test tomarrow with a 1740-3..we will see what happens

[properchopper]

re :

Good luck & bon voyage, Joey. With a little dialing in, this boat is FUN ! Let us know how she does

[SLAUGHTER_AUS]

What type of outboard leg are you guys using on those?
That is the only type that seems to work?

[Ub Hauled]

There are a few option one can use, there is the:

REK lower unit (some sorta plastic) +- 100
Lawless lower unit (aluminum I believe) +-150
Angle Drive +- 100 (aluminum)