head of the river cat hull thread

[matti1983]

I have 7xl and i am going to buy 3S lipos so how that motor would work with 6S setup??. I am using Himodel 200A ESC.

[ozzie-crawl]

that would give you around 53,000 rpm
i have run a 7xl on 4s and its easy to get over 50 mph with that hull

[matti1983]

that would give you around 53,000 rpm
i have run a 7xl on 4s and its easy to get over 50 mph with that hull

Yes i know that it will give almost 53 000rpm but i want to know how well motor/ESC can take those rpm:s.

[Punisher 67]

unless you are doing a saws boat about this well..................................

[matti1983]

unless you are doing a saws boat about this well..................................

i want it to be kind of "fun run" boat but i dont want to burn it in first runs soooo what is best motor choice with 6S? 8XL or 9XL or maybe 10XL??

[ray schrauwen]

chart:
NEW KV'S FOR FIEGAO AFTER jUNE 2009 oops caps...

http://www.offshoreelectrics.com/conversion.htm

12xl gives approx. 32K rpm for 22.2vdc

[Alfa Spirit]

540 XL 10 to 540 XL 13 under 6S is right, approx. 33000 RPM

[lomdel]

In my oinion and acoording to FeCalc a 12XL is the fastest sensible motor to use with 6S. I run a 13XL on 6S in my TC31 and it is fast and reliable. With 7XL on 6S your electronics won't last long Do the math : kv x Volts (anything more than 35000 rpm would be too much...

[matti1983]

In my oinion and acoording to FeCalc a 12XL is the fastest sensible motor to use with 6S. I run a 13XL on 6S in my TC31 and it is fast and reliable. With 7XL on 6S your electronics won't last long Do the math : kv x Volts (anything more than 35000 rpm would be too much...

How fast it is with 12XL??

[ozzie-crawl]

dont take this to the bank as such but a 12xl on 6s with somthing like a y537 prop should see you close to mid 40s,with say 5000mah batts you should get fairly good run time.
if you wanted more speed later on you can prop up
just remember the faster you push it the less run time you get

[matti1983]

Do you have any video about this boat with 12xl+6S

[Christaphason]

http://www.youtube.com/watch?v=orUlosXr5sU

Bigdg357's Hotr cat with an 8xl on 6s.

Its possible to do this kind of thing, but VERY risky.

[Alfa Spirit]

http://www.youtube.com/watch?v=orUlosXr5sU

Bigdg357's Hotr cat with an 8xl on 6s.

Its possible to do this kind of thing, but VERY risky.

He installed 6S batteries for the video only one run. 540 XL 12 turns is perfect

[Tuslow1]

I'm no pro but if it isn't a serious saw boat why deal with the headaches? In my mind the more juice you put to it the faster things will blow. ( more power more heat ) Besides, I built my HOTR Cat because it was inexpensive and nice looking plus following the setups of others it's a safe fun 50+ mph boat. Trust me a 50 mph boat will chew a nice size pond faster then you know!!! The hull looks nice but it's thin and it will not take a front-end crash because you couldn't stop it @ 60 mph. Then again what do I know take some video and lets see what happens

[matti1983]

You have convinced me that the 7XL is too much with 6S, But what about 10xl??? is it still too much?? It gives about 38500rpm`s so it`s a pit more than 35000rpm.