Rumdog's sprintcat

[Fluid]

...I wonder how much speed this hull is capable of.

I've had it in the 80s on 6S but it needed some add-ons to get there. That wasn't on glassy water either.



.

[knpc]

knpc, you going with a 1527?

Yes, 1527/1Y, Hydra 240HV, 6s2p.
I had a 1521/1.5D on 4s2p, it ran a consistant 50mph. Motor is going in my df33 now.

[Jeepers]

Yes, 1527/1Y, Hydra 240HV, 6s2p.
I had a 1521/1.5D on 4s2p, it ran a consistant 50mph. Motor is going in my df33 now.

what prop??

[knpc]

what prop??

With the 1521/1.5d I tried a m645, x450, and P230. I got the best performance out of the x450, it ran 50mph and temps were good.. With the 1527 I'll start at the x450 and work my way up.

[racerr73]

Rumdog / Knpc,

What is the weight of your sprint cats with batteries ready to run please.

Thanks
Trev

[Rumdog]

I never weighed mine. I'm not really ever too concerned with weight actually. I know a lot of guy's run similar setups and it has been proven to work, so i went with it. I does seem quite heavy for a 34" cat though. I think it helps it handle well at speed.

[racerr73]

Thats cool, mine weighs a little over 14 pounds ready to run and i just felt that was a bit heavy for a 34" cat. Was just interested to know if i was in the ballpark weight wise with the other sprintcat 34inch owners.

Trev

[knpc]

Mine was 12lbs with the 4s setup, with 6s the packs are 1/2lb more each plus a bigger motor and esc so I should be just over 13lbs rtr.

[Bigmaxy]

Hi All
Running a Sc40 with a Neu 1527/1Y, X450 (and a few other slightly larger props), Turnigy Marine 180A and 2 Turnigy x 6S 5000 20C Packs in parallel.
The thing handles brilliantly and turns like its on rails but mainly because it is slow.
I would say around 40mph. Even if it were not set up properly with strut height etc I would have expected a badly handling boat that was still faster than this.

Now the packs are quite new and should be able to deliver around 200amps as they are in parallel. I am running 8AWG wire in the parallel adapter with deans ultra connectors.

1. What amp draw should I be expecting? (I want to run around 60mph or more)
I have an eagle tree 100a but dont want to blow it up by pushing too much through it

2. What C rating packs do you folks run? I am planning to purchase some 40c packs but cant get any at the moment for a decent price

p.s. Just adding that everything comes back cool/slightly warm. Nothing seems to be working too hard, not even the packs.
(now I wonder if I am getting 100% throttle from my M8 with spectrum module, must check throttle trim)

Cheers

[crabstick]

Now the packs are quite new and should be able to deliver around 200amps as they are in parallel. I am running 8AWG wire in the parallel adapter with deans ultra connectors.

Cheers

Get some proper plugs, ie Gold Bullets, Deans are good for 50amps max..

http://icare-rc.com/connectors.htm

[Rumdog]

Strut should be 1/2" above the sponsons. Run a x455 or x457 for FAST runs! Definately need bullets!!

[bustitup]

mine weighs right at 11lbs with 6s2p including gps

[bustitup]

Strut should be 1/2" above the sponsons. Run a x455 or x457 for FAST runs! Definately need bullets!!

r u saying your bottom of stuffing tube is 1/2" above bottom of sponsons?

[Rumdog]

yes sir, bottom of the STRUT.