Project Apparition!

[FighterCat57]

Did you check the inlet on teh rudder and all the connections where the cooling lines hook up? Sometimes theres just a small blockage, be it from picking something up or some flashing left over. Doesnt take much to mess up the flow.

When mine was hopping, Im trying to remember what settled it down. I think I had to lower the strut. I remember it was backwards from what I thought it would be.

I lowered the strut 7mm down into the water and stayed with zero angle. I think this will help. It makes sense to me. See attached.

I also found that I was using 4mm bullets on my ESC and 3.5 on my Motor wires. That explains the heat!!

Like the splatter guard? Works really well and easy to clean/replace. It doesn't actually touch the shaft, but it's really close. =)
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MERCEDES-BENZ OM612 ENGINE HISTORY

[tiqueman]

Yeah, not sure what is messing it up. I can use the "pepsi bottle" and get it to flow, but it is much harder than my other systems. Each individual is OK, but all together it seems to be a slow flow. Maybe I'll skip the motor mount and see if that improves things a bit.

I ordered the Gundert and the Streamlined OSE pickups. The Gundert pickups look like they will do an excellent job on the bottom of the sponsons.

DO NOT USE THE GUNDERT!!!!!!!!! They will make your hull do all kindsa wierd stuff. I found out the hard way. Use the flush mount aluminum ones or make your own.

[tiqueman]

I lowered the strut 7mm down into the water and stayed with zero angle. I think this will help. It makes sense to me. See attached.

I also found that I was using 4mm bullets on my ESC and 3.5 on my Motor wires. That explains the heat!!

Like the splatter guard? Works really well and easy to clean/replace. It doesn't actually touch the shaft, but it's really close. =)

Typically, if you set the boat on a flat surface (ie, edge of a table) the bottom of the strut should not touch. Also this is a good way to find 0 degrees for your strut angle. Each set up will vary slightly, but Ive heard some guys running 3/8 to a half inch higher than the bottom of the sponsons on these. Thats also spinning larger props than your 38mm though.

Splatter gaurd looks to be a great idea. Good work! Theres a post on here somewhere about a gaurd built out of a heated and bent to a circle piece of lexan... but right along the lines of what you did.

And unless you were running really wet when you got that 150 on the ESC, lowering the strut is going to want to make things even hotter. So keep your run times very short at first until you have it trimmed right. And even then, for the first few runs, bring it in frequently and check temps.

The picture with the boat loaded w/ batteries.. is that where everythign sits and your cog is 7-3/4 inches?

[Rumdog]

The rudder pickup should be more than enough to coll everything in the boat. I use a single rudder pickup in my twin to cool 2 esc's and 2 motors.

[tiqueman]

The rudder pickup should be more than enough to coll everything in the boat. I use a single rudder pickup in my twin to cool 2 esc's and 2 motors.

Somethings not right somewhere.

[Rumdog]

The kv is too high. That is a 3s motor. You need a XL size can around 2000kv. You are pulling a LOT of amps with that setup which is why the esc is so hot.

[tiqueman]

The kv is too high. That is a 3s motor. You need a XL size can around 2000kv. You are pulling a LOT of amps with that setup which is why the esc is so hot.

I could be wrong but from the 3rd or 4th post, I think its runing 3S2P. But certainly a 3S motor. If it was run 4S, theres the issue no doubt.

Also just noticed.. first pic, post 31, meter is showing 11. something volts. Id say it was on 3S

[Rumdog]

AHH, ok. my bad

[FighterCat57]

Yeah, running 3s and just messing around with adjustments until the cooling can get's here for the 1515 and I figure out how to get the right prop on it.

I'm fairly confident that the bullet connectors on the ESC were causing a big heat issue. The heat issue started when I switched to the ESC with the larger connectors. (unwittingly)
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Michigan Marijuana Dispensaries

[FighterCat57]

The rudder pickup should be more than enough to coll everything in the boat. I use a single rudder pickup in my twin to cool 2 esc's and 2 motors.

Cool. That get's the flow thing out of my head. Water is flowing...

Sometimes these wierd ideas come along and mess up reality. Somehow it was in my head that the rudder pickup was too small.

FYI- the current setup is a 105a ESC, 3s2p 25c 5kmah, 2700kv w/38mm 2 blade plastic prop of an unknown pitch.
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Sierra rs cosworth

[tiqueman]

Yeah, running 3s and just messing around with adjustments until the cooling can get's here for the 1515 and I figure out how to get the right prop on it.

I'm fairly confident that the bullet connectors on the ESC were causing a big heat issue. The heat issue started when I switched to the ESC with the larger connectors. (unwittingly)

Yeah youll get it there. If it was easy everyone would do it. I remember my first tru setting up of a 32" cat.. what a P.I.T.A. that was... but once I got it right, its absolutely a fantastic running boat.

[FighterCat57]

Typically, if you set the boat on a flat surface (ie, edge of a table) the bottom of the strut should not touch. Also this is a good way to find 0 degrees for your strut angle. Each set up will vary slightly, but Ive heard some guys running 3/8 to a half inch higher than the bottom of the sponsons on these. Thats also spinning larger props than your 38mm though.

Splatter gaurd looks to be a great idea. Good work! Theres a post on here somewhere about a gaurd built out of a heated and bent to a circle piece of lexan... but right along the lines of what you did.

And unless you were running really wet when you got that 150 on the ESC, lowering the strut is going to want to make things even hotter. So keep your run times very short at first until you have it trimmed right. And even then, for the first few runs, bring it in frequently and check temps.

The picture with the boat loaded w/ batteries.. is that where everythign sits and your cog is 7-3/4 inches?

Yes, that's loaded up at the current COG. I measured it from the sponson transom to the balance point.
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Edsel villager

[tiqueman]

Cool. That get's the flow thing out of my head. Water is flowing...

Sometimes these wierd ideas come along and mess up reality. Somehow it was in my head that the rudder pickup was too small.

FYI- the current setup is a 105a ESC, 3s2p 25c 5kmah, 2700kv w/38mm 2 blade plastic prop of an unknown pitch.

How many amps are you pulling? You could be maxin out that ESC depending on what your pitch is.

[FighterCat57]

Yeah youll get it there. If it was easy everyone would do it. I remember my first tru setting up of a 32" cat.. what a P.I.T.A. that was... but once I got it right, its absolutely a fantastic running boat.

There's a lot to learn here. I'm loving it.
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Cancer - Cervical / Ovarian Forums

[tiqueman]

Yes, that's loaded up at the current COG. I measured it from the sponson transom to the balance point.

Just making sure. My 32" single drive cat has the batts much further back and the cog is at 8". Each boat and hull is a bit different. Have you checked for any twist or anything on the sponsons?