Stiletto Race Prep

[simo71]

That sounds almost straight, do you mind posting a picture from the side? Mine is probably not setup correctly then:

95mm for the table to the bottom of the cav plate, measured at the back of the plate

26mm from the motor mount plate to the center of the lower trim bolt.

Which means that it's probably too high and too much positive angle. I do mount both batteries in front, which batts are you using (weight?) and how do you position them?

The measurement I used was from the center of the trim bolt to the outside of the motor mount so towards motor.

I did not use the mount on the transom for the trim measurement, only the bracket for steering & trim.

[GP73]

The measurement I used was from the center of the trim bolt to the outside of the motor mount so towards motor.

I did not use the mount on the transom for the trim measurement, only the bracket for steering & trim.

Mine is at 1cm exactly then. Here is a picture, it's a little blurry. that gives me more positive angle than you, I'm curious to try your setup and see the difference.

Anyone else willing to share their measurements? Darin perhaps?

Tonight a ran with a 2000Kv generic motor (from the Surge Crusher) on 4S with an X437/3, I took few videos with a tripod but they didn't turn out that great.

Again, it's hard to gauge the speed without a GPS/radar gun, but it looked definitely faster. Temps were 84 motor/ESC, 91 caps and 113 on batteries (2x 2S Flightmax 4K 30C), water temp was around 55.

I'll try to upload the videos later.

Tomorrow I'm going with a 5S on a Turnigy 1500Kv, weather permitting.

Wish me luck...

[GP73]

i got about the same measurements and the motor is very close to stright

Same as me or Simo?

[GP73]

Tomorrow I'm going with a 5S on a Turnigy 1500Kv, weather permitting.

Wish me luck...

WOW, with the Turnigy 1500Kv and a 5S 5K 30C Flightmax it was flying over the water! Using a GrimRacer 40x52/3.

Also very easy to hook and flip in turns.

After a 2 mins run temps were around 120F for everything.

I've tried Simo setup, 85mm and 12mm angle and it was running way too wet, stable in the corners but literally lost all the speed. Also the battery went down in just a minute or so.

The LVC on the stock ESC didn't kick in at all and the cells were in between 3.35v and 3.25v, not good. But the battery is not puffed at all and it's balancing fine as I write this, i just have to make sure to bring her in as soon as it slows down

So now I have 11mm angle as discussed before and 16mm up trim measured from the bottom of the leg mount to the top of the hull.

Pic is better than words, apologies for the quality:

[simo71]

If you are running it with 5s then the setup will probably not work due to the extra weight...so your on your own with that one.

Mine carries the nose in the straights & sets down in the turns dropping the inside sponson in...nice! People think I'm running a third channel for trim.

[GP73]

Understood, I just weighted the batteries:

2x 2S1P 4000mah 30C Flightmax hardcase: 531g

2x 2S2P 5200mah 30C Turnigy hardcase: 688g

1x 5S1P 5000mah 30C Flightmax: 670g


I'll avoid using the 4K ones, that should give me a more consistent weight to work with. Which batteries are you using?

BTW, I was doing some reading about tunnel hulls, according to what I'm reading a good starting point is having the prop shaft 1/8" above the bottom of the sponson and 1º negative angle. I'll reset mine to that and try again tomorrow.

[GP73]

BTW, I'll listen to you guys and run on 4S from now on , I'll just put back the 2000Kv motor I was using yesterday...

Video is coming.

UPDATE: Here it is

[GP73]

Did I kill this thread?

[ron1950]

dont think so......did u see the vid on here somewhere of the ul-1 motor in the stilleto? looked pretty fast..it mght be the way to go.....

[GP73]

Yes, that's where I got the idea of using a 2000Kv motor I had lying around. Next is going to be a 2075Kv with M440 (4S) and a 1620Kv with X642 (4S and maybe 5S).

I've also ordered an outrunner, I'm wondering if I can use that on the Stiletto:

Eventually I want to try changing ESC and running on 6S with a 1300Kv unit, just for the fun of it.

[Brushless55]

Yes, that's where I got the idea of using a 2000Kv motor I had lying around. Next is going to be a 2075Kv with M440 (4S) and a 1620Kv with X642 (4S and maybe 5S).

I've also ordered an outrunner, I'm wondering if I can use that on the Stiletto:

Eventually I want to try changing ESC and running on 6S with a 1300Kv unit, just for the fun of it.

Keep us posted, I love the looks of this hull

[Zlui]

2 questions from west of the Atlantic ...

Hi Guys, hi Darin,

I’m Christoph (or Zlui), I live in Germany, and I have followed your discussions on the Stiletto from day 1 – I was about to buy a small cat in June when I heard about this boat, and I ordered one. It has finally arrived yesterday (probably one of, if not THE first in Germany), and I will set it up over the weekend, trying to follow your advice …

The first things I noticed were the decals that are not applied right (bubbles and waves), paint seems to be OK, manual is only in English (which is not a problem for me, but might be for others), and another thing that I dislike is the fact that the Dean connectors are totally uncommon in Europe. None of my batteries fits … oh well.

But what annoys me the most: I find the Tupperware lid and the pull-pull cables that scratch over it really are a bad joke - I don’t know if Thunder Tiger Bandit boat sells in the US, but there you can see how that issue should have been solved. Take the time and google for pics of it, their solution is just brilliant (unlike the rest of that boat, though – I was considering to buy one before I heard of the Stiletto). Apart from that, the Stiletto looks fine and I’m looking forward to running it.

Only two question (for now), you guys suggest to block sand the sponsons, don’t you have to paint them again after that, or are you more polishing than sanding the surface? And would you say that initial changes are needed to the stub shaft in order to have the prop run freely, do I have to grease it, or can I start right out of the box?

Btw, I am being a little off-topic here, but you might be interested to see what other nice things we are doing here in Old Europe; take a look: http://www.dmax.de/video/die-modellbauer-episode-13-1/

TV series on rc modeling, showing (among others) a Mystic Cat, 1,85m (~6ft), 2 gas turbines with 8 kW each, 175 km/h (>100mph), made up of parts for 15.000 EUR (~20.000 US-$) … pretty neat. For the launch see 2nd half of episode 5.

Have a good day
Christoph

[ron1950]

after a crash into the rocks i noticed my propshaft has a wobble in it....i ordered the drive dog and stub shaft and brass ferral but wondered what made it so lose etc..... the prop never hit the rocks as far as i can tell as it was upsidedown after the nose hit the rocks.....anyone need a slightly damaged stiletto hull cheep? lol

[GP73]

I have the wobble too, about 2mm in each direction. I never crashed mine, so it could be a wear issue.

I bought a Hyperformance stub shaft here on OSE: it's a drop-in replacement and very well built, but it doesn't turn as freely as the stock one, even after greasing it. I'm hoping it will loosen up a little with usage.

Did you try the M445? How is it?

[ron1950]

the m445 is huge compared to the 642 not sure i want to burn up a motor or esc right yet ...lol