working over my mean machine ....

[gsbuickman]

Why in the heck are we watching some European guys Sprintcat?


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ha ha ha ha ha , actually if you want to get technical, Jorn' is Norwegian .
Because the sprint cat is essentially the same as the !mm. I talked to him about his setup on his Aeromarine's, and decided to try something similar with mine on 5s, just not as fast

[Fella1340]

I'm thinking he just wanted to share a video with us, it's his thread after all.

[flraptor07]

I'm not sure I'm getting what it has to do with "Working over my Mean Machine" ????

[Luck as a Constant]

working over my mean machine ....

Why in the heck are we watching some European guys Sprintcat?


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[gsbuickman]

Here is Jorn's 29" sprint cat. He's running a 4040 1800kv on 6s, pulling a 440/3 prop.
After this he swapped in a 4074 2000kv mill, and a x645 prop & broke 75 mph . Jorn races FE across the pond. I follow his vids :-) .

https://m.youtube.com/watch?v=dCNAphiIyN8I

[gsbuickman]

In post 48 it says M455..

Typo

[tlandauer]

In post 48 it says M455..

lol... m445 says post #19

[flraptor07]

It's a good ol' m445 w/ a 1\16" back cut, to cut down on the low speed amp draw & gives it a Lil' more rpm

1.4 x 1.77" = 2.478"

I also like the Octura 440/3 blade on this setup, with 4s & 5s. A 1.6 pitch x645 on 5s is smokin' fast with this hull, or the sprint cat, but squirrley and hard to hadle

In post 48 it says M455..

[gsbuickman]

Did you say M455 prop? that's 55mm 1.4 pitch?

It's a good ol' m445 w/ a 1\16" back cut, to cut down on the low speed amp draw & gives it a Lil' more rpm

1.4 x 1.77" = 2.478"

I also like the Octura 440/3 blade on this setup, with 4s & 5s. A 1.6 pitch x645 on 5s is smokin' fast with this hull, or the sprint cat, but squirrley and hard to handle

[flraptor07]

Did you say M455 prop? that's 55mm 1.4 pitch?

[Luck as a Constant]

working over my mean machine ....

Yeah maybe it's the angle of the camera playing tricks. Your strut height sounds right, good prop choice... Etc

The rpm still sound a bit low to me but if you can get a different vantage point Thad be great.
Most of us in here have/had mean machines including myself, so we know what it should look like at full throttle


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[tlandauer]

"... I do realize I need a deeper rudder with the higher power setup. I was testing my turn radius when the power alarm on my r radio started beeping. "

In my opinion you won't realize the full potential of this hull's turning ability until you install a longer rudder, you will be amazed at the difference it makes , also the threshold between spinout and no spin out is surprisingly narrow.
A 5" rudder may do the trick, I had the Speed Master http://www.offshoreelectrics.com/pro...d=ros-spdr-001 and no more spin out.

BTW, vid. is nice, like your location

[gsbuickman]

I almost forgot . The hull is 29" long, and the balance point I s set a th 30%, which I s 9 1/4" from the rear, or 19 3/4" from sponson tip. After notching the slot in the strut the prop is 3/16" above t he ride pads.

[gsbuickman]

Sorry guys let me clear up some of your confusion, sorry .

It is a 2350kv / m445 prop on 2 thunder power 3850mah 30/60c 4s1p cells in parallel, s OK its basically 7700mah 4s2p. The rudder is a 4 1/2" swing away, that hangs 2 1/2" below the ride pads.

CharacteristIcs of a stepped hull is that it snaps turns at speed like it's on rails, whi c h it does at lower power/ kV like the 2s x 2 4s series and 2030kv that was in it.

Its a lot faster than it was before, way faster than the 35mph traffic In the street. I do realize I need a deeper rudder with the higher power setup. I was testing my turn radius when the power alarm on my r radio started beeping.

I do need a better camera angle, like a side view that shows a full speed pass, rather than a front diagonal. I was filming off a tripod, so I couldn't track with the boat. I also need to film at a larger pond, this is just the pond I use for shakedown test runs.

As soon as I get my new 200A ESC I ordered, I'll shoot some vids at Julius kleiner park, and I may give my venom 5000mah 25c 5s1p packs a try in parallel.

[Luck as a Constant]

It almost looks like it's running with the lvc kicked in


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