Sprintcat .20/.40

[Rumdog]

getting there:

[Rumdog]

......

[mm123521]

Rumdog
I just set up the same hull with a Leopard 4074, 2000KV, 6S, T180, and a Octura 442 prop(detounged).
Thats 44,000 RPM unloaded. Started out with a .187 flex drive and couldnt get it running smooth at 44,000 rpm. Switched to .078 wire drive, and the viabration problems went away.
I got about 8 runs on this setup and still working out the bugs. Motor and ESC run cool, but I had to water cool the stuffing tube. The hull runs LIGHT on the water and goes like heck!

Mark

[Brushless55]

Rumdog
I just set up the same hull with a Leopard 4074, 2000KV, 6S, T180, and a Octura 442 prop(detounged).
Thats 44,000 RPM unloaded. Started out with a .187 flex drive and couldnt get it running smooth at 44,000 rpm. Switched to .078 wire drive, and the viabration problems went away.
I got about 8 runs on this setup and still working out the bugs. Motor and ESC run cool, but I had to water cool the stuffing tube. The hull runs LIGHT on the water and goes like heck!

Mark

holly crud, tha's a lot of revs

[dasboata]

I 'm still undecided on what I will do to seal her up. I'm either going to run a sub hatch, or mod the turbine hatch. I'd have to cut off the front of the cokpit and attach it to the hull, and seal up the turbine and build a lip in the rear to tape.

I am suprized you went for the turbine hatch the classic is easer to tape down where are you putting the Lipos behind the motor,,, Great boats I must have built 10 of them from 40-80 Nitro they handle well into the 60"S good luck and keep us posted

[Rumdog]

I hate the looks of the classic hatch. It would have been MUCH easier though. My lipos fit into the sponsons. I finished up the hatch and maidened her yesterday. Ran 2 sets of lipos through. 4s2p and 5s2p. I cut pool noodle for the sponsons and they hold the lipos firmly in place.
49.1 mph with 4s and a x645. 60.4 with 5s and the same prop. x440/3 wouldnt hook up worth crap. same for a H6. p220 cavitated a bit too. Going to try a m447 today and a x548.
And the turns!! It's all I hoped for! Handles just like big brother!

A little paint on the hatch and maybe some cowl locks and she's done!

[Rumdog]

couple more:

I used thick lexan and cut the shapes that I wanted to fit the turbine opening and to go across the deck.
I used several layers of light glass to stiffen it up and to attach it to the canopy.
Afterwards, I used a mixing stick masking taped to the rear of the deck so I could lay a little glass on the top side of the deck lip and flood it with resin. I attempted to dye the resin yellow with some acrylic paint. Worked well till it started curing then turned brownish.

[carlcisneros]

very nice set up and it looks like it is on its' way for sure.

I was thinking of putting a CC1520 in one on 5s and 6s.

Any thoughts and recommendations?

[Rumdog]

Thanks.
I think the 1520 would work well. It would fly with 6s for sure.
I'm going to try my setup on 6s as well, but with a smaller prop. Prob a x442. I'm really diggin this boat!

[carlcisneros]

cool

thanks Rummy.

If you can get a hold of one, try an ABC 1614/3 Chopper prop when you go 6S.

[HOTWATER]

I hate the looks of the classic hatch. It would have been MUCH easier though. My lipos fit into the sponsons. I finished up the hatch and maidened her yesterday. Ran 2 sets of lipos through. 4s2p and 5s2p. I cut pool noodle for the sponsons and they hold the lipos firmly in place.
49.1 mph with 4s and a x645. 60.4 with 5s and the same prop. x440/3 wouldnt hook up woth crap. same fo a H6. p220 cavitated a bit too. Going to try a m447 today and a x548.
And the turns!! It's all I hoped for! Handles just like big brother!

A little paint on the hatch and maybe some cowl locks and she's done!

Oh man...that's fricken awesome!!!! 5S at 60 mph ?! Nice job!!!!!!!!!!!!

[Rumdog]

Couple shots. Have some new cells on the way to give 6s1p a whirl!

[Jacked1]

Lookin good Rummy!
You an sprint cats are made for each other!

[Rumdog]

Thanks.
Yep, they're my favorite!

[jingalls007]

Sprincats are also my favorite. Do you have any video yet?