The official 36" zelos twin modding thread

[dasboata]

Thanks MADRCER, That's about what I was thinking too. Spun it up on the bench today after making the harness. Geez those motors hum don't they?

Did the sponson tips and tunnel nose as well with epoxy. Thanks for Travis for that little gem - yeah I put it in water... :-) Learned the necessity of needing that with my 48's. This hull feels stronger though I have to admit.

That seam though....... Who's strengthened that? Better than in my 48's.. but still looks a tad weak. Were you guys just pouring a little epoxy along it?

so let me understand this you just pour epoxy in the boat to make it stronger ? with no reinforcing cloth

[Mxkid261]

so let me understand this you just pour epoxy in the boat to make it stronger ? with no reinforcing cloth

I put like 2-4 oz in each sponson tip in a cat hull with some chopped cloth mixed in, should probably do the mono I'm building. And put it in cool water so the heat from the epoxy doesn't deform the hull. For the transom I like to put all the hardware on and then just pour some epoxy in till it covers the nuts. I've picked up on this stuff the past couple years from Travis' builds. My buddy had a sponson tip crack open down the seam on a v2 geico a couple years ago from a blow over, it has epoxy in the tips now after we fixed it. I bet it wouldn't have split if it had originally had epoxy in the tips!!

[banixj]

my mod for strut/transom: custom made carbon fiber plate!
quick job, good update!
no way to change bronze sleeves but at least one improvement was done!
transom mod.jpg
But i still have to do the left side... sigh......

Anyway today i'm so happy: i reach 112kmh 69,61mph!
Air temp: 26°C 79°F
Water temp: 22°C 72°F
ESC and LiPos temps: 60°C 140°F
Keda motors temp: 80°C 176°F

[dasboata]

[QUOTE=Mxkid261;697917]I put like 2-4 oz in each sponson tip in a cat hull with some chopped cloth mixed in, should probably do the mono I'm building. And put it in cool water so the heat from the epoxy doesn't deform the hull. For the transom I like to put all the hardware on and then just pour some epoxy in till it covers the nuts. I've picked up on this stuff the past couple years from Travis' builds. My buddy had a sponson tip crack open down the seam on a v2 geico a couple years ago from a blow over, it has epoxy in the tips now after we fixed it. I bet it wouldn't have split if it had originally had epoxy in the tips!![/Q,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,,,,, I don't use alot of epoxy I use polyester resin all that stuff when its setting up it makes heat,, but that sounds like a lot to me ,, anyway if it works for you, more power to you, I my self will stick to polyester resin and cloth for reinforcing and or pore in foam TY

[Erroneous]

I used 2" glass tape down the seams. From just in front of the water outlets to as far forward in the tips as I could reach. A few pages back you can see the roller tool I made to do this. Also hit the transom with two layers and the batt tray mounts.

[IRON-PAWW]

Yes - as the guys say - the sponson tips and tunnel nose are a point of weakness for many cat hulls. Time after time I've seen pics of hulls failing there, so a method of strengthening is to pour epoxy with chopped carbon in those places. I put maybe 25 - 30g in each tip and the tunnel nose. Seams - yes usually I put glass or carbon tape. But I thought I'd read someone was just pouring a little epoxy along that as well in this hull due mainly to difficult access for roller tools etc. But I'll check your method Erroneous and see what I can come up with as well.

[Mxkid261]

[QUOTE=dasboata;697932]

I put like 2-4 oz in each sponson tip in a cat hull with some chopped cloth mixed in, should probably do the mono I'm building. And put it in cool water so the heat from the epoxy doesn't deform the hull. For the transom I like to put all the hardware on and then just pour some epoxy in till it covers the nuts. I've picked up on this stuff the past couple years from Travis' builds. My buddy had a sponson tip crack open down the seam on a v2 geico a couple years ago from a blow over, it has epoxy in the tips now after we fixed it. I bet it wouldn't have split if it had originally had epoxy in the tips!![/Q,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,,,,, I don't use alot of epoxy I use polyester resin all that stuff when its setting up it makes heat,, but that sounds like a lot to me ,, anyway if it works for you, more power to you, I my self will stick to polyester resin and cloth for reinforcing and or pore in foam TY

2 oz might sound like a lot but it barely fills a geico sponson tip Lol. Think of a shot glass! I guess I shouldn't say "epoxy" because I do just use poly resin. Just call it epoxy sometimes lol

[dasboata]

[QUOTE=Mxkid261;697989]

2 oz might sound like a lot but it barely fills a geico sponson tip Lol. Think of a shot glass! I guess I shouldn't say "epoxy" because I do just use poly resin. Just call it epoxy sometimes lol

If it heating up too much reduce the hardener Mek !!!

[CraigP]

Note: epoxy that dries when hot has a harder surface but greatly reduced modulus of elasticity, or to put in other terms, its brittle. That's the trade-off between fast and slow setting exothermic reactions. It's basic chemistry... 5 minute stuff will shatter like glass when knocked about

[IRON-PAWW]

I just used used the west system 105 resin with the 206 slow hardener. Admit I pretty much always do the 1 part hardener to 5 parts resin mix with that stuff. Took a good few hours to set properly - winter and chilly here right now. But yeah - about a shot glass in each sponson tip. :-)

[rcboone2000]

Has anyone tried the new proboat 3831 motors I put them into mine today and picked up a little over 4 mph

[fweasel]

I'll let you know this weekend.

[fweasel]

New 8mm connectors on the ESC to motor wires. My old connectors would run upwards of 180* after a 4 minute run and routinely melted the foam flotation on the hatch. These are overkill, but it was the only size I had on had bigger than 5.5mm. The new 3831 motors ready to go in as well. I've had them on the bench for a few weeks now, but haven't had the time to get them installed. I need to clock the water jackets and put 90* water fittings on the bottom inlets. While it was all apart, I scuffed up the bottom of the motor mounts to help them grab a little better when installed. Mine don't move on me, but it's been known to happen.

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[fweasel]

Also made myself a new lake side boat stand from the foam packing material that comes with a Sonos subwoofer. It couldn't fit more perfectly if you hand carved it yourself. I was all set to trim it down to fit with a long hobby blade, but I didn't have to touch it. Works out great.

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[vinnyp]

Looking good Ryan. I have completed some mods myself this week. A few weeks ago, one of my stock 3910 motors burned up. Long story short, HH warrantied it for me. However, the new 3831's were out of stock. So, I ordered a set of 3930's because they were not sure when the 3831's would be available. As it turned out, this week a pair of 3831's showed up at my doorstep. Much faster than expected. Anyway, I have the 3930's installed since last week. I got to run them but the conditions were terrible. So, no usable data yet. Hopefully, this weekend will yield better results, but its not looking good.
Another little project I took on was to double the water cooling . I installed a pair of OSE's dual thru hull fittings. I wanted to allow separate water cooling to each ESC and motor, essentially doubling the cooling capability. Hopefully, it will work.