Spartan, tear it down to build it up

[Brushless55]

Exactly

If it was just being sucked out it wouldn't be all over the right side of the transom.
The glob will always be on the strut, I don't use the grommet method and still have it on mine. You can also make the K&S stuffing tube longer to take up that space.

The first batch of plastic liners did seem tight, I also think that the smaller ID brass tube would not allow the teflon or anything else to expand slightly due to heat, then extrude any remaining runny grease.
The stock tube also seems to be what most call brass-is. It may be a little "soft" and maybe what caused the golden brown teflon flakes.

I would also say, based on what I note from running my MG, with an OSE cable(not an entirely valid direct comparison), the the relatively high drive line temps (vs. 85*f 5s) causes the grease to break down, discolor, and run. After running the MG a few times the blue pro boat grease is still fairly blue without a green tint that I get when I run the spartan.

I am hopeful a whole new drive line will solve the heat issue

I've forgotten about this other problem with this boat..
What about a stinger like what is on a SV27, but a Speedmaster..?
they work correctly
http://www.offshoreelectrics.com/pro...os-stinger-str

[GeoVW72]

BL55: JPriami had good luck with his speedmaster, but that was with wire drive. I don't really see the strut as an issue, as long as it's level and lubed it is fine, the rest of the drive line is the problem.

mave: we're not looking to re-invent the wheel, work with/around what's there. I don't think it is the length of the shaft, just the way it is made.

dag-nabit: not challenging the design, we all know how the stock one ends up

Got bored waiting for parts... dug around the parts bin and got some inspiration.



I will say it's the first brushed spartan, but with the stock prop it will only just outrun my friends Villain, about 22mph.
Plenty of grunt left, have to prop it up and see what it'll do.

[dag-nabit]

With the mods, I had a reasonable amount of grease residual left on the flex drive after two runs today.

Posted here: http://forums.offshoreelectrics.com/...ad.php?t=25497

Kevin

[GeoVW72]

Looks great Kevin

Proped the brushed spartan up, got 30mph with a P225.
amp load didn't change anyone have any info on E theory.
I'll also say that it's silent too

[Brushless55]

Looks great Kevin

Proped the brushed spartan up, got 30mph with a P225.
amp load didn't change anyone have any info on E theory.
I'll also say that it's silent too

how were the temps bro!

[GeoVW72]

how were the temps bro!

Temps are good

106*f on the esc fets (standard temps for villain)
~80* on the motor with the jacket
burns through about 3500mah in 12min on the stock prop and 9min with the P225 (using lipos without a cut off so I stop short, no cells for me anymore)
JB welded the slot in the torque ring, but the jacket leaks a little bit. Stock jacket may work, but I'm thinking it's too wide.



did some more tweaking; added brush cooling and did a Y setup.
stock drive line has no problem with this setup, rpms are low, motor has no problem either, why isn't this on the shelves!

George

[dag-nabit]

how were the temps bro!

Temps were great Brushless, 20-24*C (70-75F) on motor, esc, and batts. (27*C on caps if I recall correctly)

But I wasn't going hard because of water conditions.

Kevin

Ooops, I see you were asking George.

[GeoVW72]

Wow Kevin, those temps sound really good. You may have not been on it but you had proped it up, caps do get hot when you run on and off the throttle. poped the ones on a proboat 45A from my friends BJ26 running in too much chop.
I'm anxious to hear how your weekend goes, I really think a real drive line will make the boat run 100% better.
I've even seen, just changing the brass stuffing tube, a 1-3mph increase on 4s.

Still impatiently waiting for Jeff's cable.

official broke 30mph with the brushed spartan.
The Y-ed line and the brushed cooling weren't the best idea, changed them back.
Still think it has more, preped the x448 I have, largest prop I have other than huge gas props.

See how it goes

[Brushless55]

Wow Kevin, those temps sound really good. You may have not been on it but you had proped it up, caps do get hot when you run on and off the throttle. poped the ones on a proboat 45A from my friends BJ26 running in too much chop.
I'm anxious to hear how your weekend goes, I really think a real drive line will make the boat run 100% better.
I've even seen, just changing the brass stuffing tube, a 1-3mph increase on 4s.

Still impatiently waiting for Jeff's cable.

official broke 30mph with the brushed spartan.
The Y-ed line and the brushed cooling weren't the best idea, changed them back.
Still think it has more, preped the x448 I have, largest prop I have other than huge gas props.

See how it goes

Very cool mam
now you have me wondering how a Dewalt 14V motor would do
you know, that esc will take 5s

[GeoVW72]

Well, didn't go so well.

prop is too much for the motor, x448, so the boat is somewhat smelly now. motor cooked a little bit, but everything is ok.

Here's the Vid

only got 32mph out of it, so diameter is the wrong direction to go with the motor.
Most people run dewalts in their summits as a replacement to the 775, I guess they have more torque and last longer.
Not looking to push the esc that far, may try it at some point.

[Brushless55]

Well, didn't go so well.

prop is too much for the motor, x448, so the boat is somewhat smelly now. motor cooked a little bit, but everything is ok.

Here's the Vid

only got 32mph out of it, so diameter is the wrong direction to go with the motor.
Most people run dewalts in their summits as a replacement to the 775, I guess they have more torque and last longer.
Not looking to push the esc that far, may try it at some point.

the Dewalt is a better built motor that is easier on the esc and run better

[GeoVW72]

Well, had the first "casualty"


bored waiting for the cable, added the second trim tabs(a body reamer and close enough works well) and cleaned the hull with Meguiar's PlastX, which got some good speeds:



34mph on 4s



and the 5-0 on 6s


brought it in after it hit lvc and checking temps, starts creaking and cracking, pop the straps and the pack splits.

Found that a piece of lexan can keep most of the transom clean:


I don't feel that the extra trim tabs do much for chine walking, they keep it in check to some degree. I think that most of the issue is coming from the drive line.

When does the new one come out Peter

[Brushless55]

Hey Geo, what motor and prop were you using to get those numbers??
thanks!!

[Doug B]

Just read this thread start to finish, awesome work geoWV72! I just bought a Spartan that I am sure is from the first run of them, and this info is exactly what I was hoping to find. I am anxious to hear your results after blueprinting the driveline, both how it affects motor temps, and the chine walk. Anyway, just wanted to thank you for saving me alot of trial and error, I'll be lurking :)

[dag-nabit]

Just read this thread start to finish, awesome work geoWV72! I just bought a Spartan that I am sure is from the first run of them, and this info is exactly what I was hoping to find. I am anxious to hear your results after blueprinting the driveline, both how it affects motor temps, and the chine walk. Anyway, just wanted to thank you for saving me alot of trial and error, I'll be lurking :)

Welcome to the Forum Doug.

Don't just lurk, participate, we like hearing of the experiences of other members of the community.

Kevin