looking to build a new cat- need advice

[kwiktsi]

I am looking to build up this cat- http://cgi.ebay.com/32-fibreglass-ca...742.m153.l1262

Now- I want advice on how to go about this. I have two Elite 30C 5300 5S packs for power supply. I wanted to run dual 8XL's with dual struts (think it looks badass with the twin struts :)) on 5S each, but am wondering if a single motor on 10S is better. I know HV ESC's and bigger motors like that get pricey, I wanted to keep the cost out of the stratosphere on this one which is why I was thinking the dual Feigao 8XL's with a couple of "cheaper" ESC's would be a good choice too. What are your thoughts guys?

[NorthernBoater]

I would suggest a Mean Machine over that hull. It is wider and will be less prone to rolling on the turns. For a motor I would recommend either a 10XL or 9XL if you want to go with 5s. I would suggest going 5s2p because I have found through experience with brushless boats that some extra weight is usually beneficial.

[kwiktsi]

I would suggest a Mean Machine over that hull. It is wider and will be less prone to rolling on the turns. For a motor I would recommend either a 10XL or 9XL if you want to go with 5s. I would suggest going 5s2p because I have found through experience with brushless boats that some extra weight is usually beneficial.

If you are talking about the Aeromarine Mean Machine, I agree, it would be a better hull but I'm being a)cheap and don't want to spend the money and b) finicky and don't really like the looks of the Mean Machine- the styling is too "80's" IMHO.

As for 5S2P- it would either be 5S2P or run them series for 10S- either way, both packs were going in the boat :D. Are you saying a single 9 or 10XL? I don't think that will get me the speed I want. I was thinking with the twin 8XL's on 5S each, it should scream and still be relatively safe on amp draw, especially with X438's-X440's on it since the motors would help take the load off each other. Am I wrong with my thinking here? If I didn't do this, then it would have to be some expensive motor and expensive HV ESC on 10S- which I am trying to avoid.

I have my 26" cat with an 8XL and 4S which runs low 50's. I originally bought these packs for that boat- but they are HUGE compared to my other packs and I don't know how the boat would like the weight from them. I may give it a shot anyway, but still want to go with a bigger hull to run them in too. Thanks.
Joe

[Fluid]

...I would suggest going 5s2p because I have found through experience with brushless boats that some extra weight is usually beneficial.

I agree about the extra weight, but lithium cells are a very expensive way to add it! I use lead myself, it's cheaper and takes up a lot less space.



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[kwiktsi]

I agree about the extra weight, but lithium cells are a very expensive way to add it! I use lead myself, it's cheaper and takes up a lot less space.



.

You guys missed the point- I have the packs already :). I have 2 5S 35C 5300 Elite packs. I just want to know if I am better off running two motors with 5S2P one with 10S. I would do twin motors with 10S- but the motors and ESC's for 10S get EXPENSIVE, no way am I doing it twice lol. I know voltage is preferred over amps- but HV controllers are EXPENSIVE!! If I can get it to work on twin 8-9XL on 5S2P, I can get two 125A Hextronics for less than one HV controller! The cat isn't overly large at 32", so I'd think I can get away with 5S and twin 8-9XL's, no?
Joe

[NorthernBoater]

I agree about the extra weight, but lithium cells are a very expensive way to add it! I use lead myself, it's cheaper and takes up a lot less space.



.

That is why I suggested the 5s2p because he said he already had the packs. Going with a dual drive setup adds a lot of costs and you will not see many performance increases.

[kwiktsi]

That is why I suggested the 5s2p because he said he already had the packs. Going with a dual drive setup adds a lot of costs and you will not see many performance increases.

dual Feigaos with dual Hextronics is less than just one HV ESC to run 10S :). That's what I'm thinking, the additional stinger, flex and ESC cooling plates don't add up to nearly the difference either. I also like the idea of the twin cat with dual stingers out the back- for looks more than performance. They do seem to handle nicely with twin counter rotating motors too from what I've seen.

Not trying to be hard headed or not heed the advice, just laying out my thoughts on this. I'm not set on any one particular way, but I am partial to the twins :D.

So, with the single in mind- will a single 9XL move it well on 5S? Man, the single motor with the 5S2P packs would give ridiculously long run times too with 10,600 mah! I just think if I go single, I may as well make it big and run 10S- but that is pricey as hell and this isn't really the hull for that kind of build. I don't know. I didn't have this confusion until I got my packs and realized they were pretty damn big for my 26" cat and decided to build something to use them in.

[Ub Hauled]

IMHO that 32" hull is small for 10s.
stick with the 5s2p... chose wisely and you'll have a bullet in your hands, even if you run 1 motor... besides, 1 ESC and 1 motor is cheaper, you may even get a little better ESC then the Hextronix.

[ozzie-crawl]

these hulls handle really well. i have one with a 7xl on 4s 2p does around the 60mph mark. and have another hull waiting for some more finances that will run twin ammo 2300s wont be real fast but just want to do a twin

[roussos.p.antonios]

Hi !!
this hull is a copy from the H&M agitator.
i have the agitator with feigao 9xl 5s lipo and x642 prop.
the speed with that set up is 55mph.
if you want take a look to my thread (h&m fast cat )
it is a very good hull!!

[kwiktsi]

IMHO that 32" hull is small for 10s.
stick with the 5s2p... chose wisely and you'll have a bullet in your hands, even if you run 1 motor... besides, 1 ESC and 1 motor is cheaper, you may even get a little better ESC then the Hextronix.

My thing is I was looking for ~60+ out of it and a single motor to move that is probably going to be a Neu or something, doubt a Feigao XL will do it reliably, even on 5S. That's why I was thinking twin 8-9xl's (leaning more towards the 9 after doing the math) would be a rocket in this thing and still give pretty good run time.

[ozzie-crawl]

stuffed my post up. i was running a 6xl 0n 4s2p with a x642 detounged wich put it in the 60mph mark but only for short runs. have changed to a 7xl for longer run times and more reliable. havent gpsd it yet but would say around mid 50s.have seen posts were people were goining for twins but i havent seen one finished

[focused]

Two 540xl versions are to big to put in de cat as a twin setup but you can put two feigao 380L8 as twin setup each on 3s lipo speed up to 55mph with 36k props and you dont need a big esc for it .

Michiel.

[ozzie-crawl]

iam also doing a twin cat. do you think 380s would be enough as this would make motor placement easier

[kwiktsi]

Two 540xl versions are to big to put in de cat as a twin setup but you can put two feigao 380L8 as twin setup each on 3s lipo speed up to 55mph with 36k props and you dont need a big esc for it .

Michiel.

Don't you think those motors are a little small, even for a twin setup? I'd think it would require at least 540L motors.