NEW Pro Boat Impluse 31 RTR V2

[Darin Jordan]

well darrin? lol… what is going on here manny….?

Manny.. I'm still trying to understand your point here???

To answer your question directly?? TOO MANY!

But you ask the wrong question... WHY do they burn??

Because people aren't fully aware of the technology they are working with, think their boats will work just like their cars or planes, and run them under conditions that perhaps they shouldn't.

And, Yes, sometimes, there are also electrical/mechanical issues that contribute as well.

Now, if you'd like to know how many of these "ships" I'VE burned?? A few, but in EVERY case, it was because I was pushing them well beyond what I should have been, or TRYING to find the limits....

Personally, I would NEVER take one of these boats out of the box, throw 6S into it, and expect it to survive. I WOULD eventually run 6S in it, but I'd build up to it, once I knew that I had the boat 1) worked out of any bugs, 2) setup correctly and handling "loosely" enough to attempt 6S, and 3) was willing to push it to it's absolute limit.

But, hey, that's just me... what do I know??

[Darin Jordan]

I WOULD eventually run 6S in it, but I'd build up to it, once I knew that I had the boat 1) worked out of any bugs, 2) setup correctly and handling "loosely" enough to attempt 6S, and 3) was willing to push it to it's absolute limit.

IN fact... I DID run my IM31 on 6S, on 6S... and I ended up melting off a contact... BUT, I found out that I had a water-line pinched, so the motor wasn't cooling, which melted the glue on the endbell, allowing the motor to rotate, binding the flexshaft, all of which increased the amps, and melted the solder out of the contact.

HAD I been more careful and inspected the setup (threw it in at the Nats just to see what it would do on the 2-Lap TT.... Ran 34-seconds with the stock prop, which is only about a 35mph average), I am certain it wouldn't have had these issues. It can happen to anyone. You have to pay attention to the WHOLE system...

[bob_t]

Darin,
Talking about "whole system", maybe you can help me with this ... sort of off topic, but still very much relevant to new purchases of these RTR boats. In the "features and specs" it says you don't need to balance the Stainless Steel prop (PRB4019) that comes stock on the Impulse and a variety of other models (Mystic, BJ29, etc), unless you want optimum performance and acceleration. My friend's brand new Mystic, after only a couple of runs, developed a lot of "slop" in the rear strut bushing, even though it was greased every 2 runs (5 minutes per run 4S, 2-2S, stock setup). We hit the throttle one time, boat just sitting in the stand, and it just about vibrated off the table! The prop was visually not centered - it wobbled when you spun it. So, we got a new PRB4019 and I put it on my balancer and it too was WAY off. Just spinning it by hand or blowing on it, it would shake the balancer pretty bad. Checked closer with calipers and dial indicator and found out the bore was off center in the hub by .015" making one side really heavy. (Didn't check the original one that close, I assumed it just got damaged.) I ordered another one and that one was much better, but still not close to being balanced. (The marking on the prop was different, too, maybe different stock?) I got the new prop balanced pretty good, fooling with it for about an hour. Since that unbalanced mass is overhung at the aft most strut bushing, it seems to sense that it would wear the bushing alot more quickly, than if the prop was balanced. Without balancing these, I'm pretty sure the strut bushings would prematurely "wear out". Do you run these props "right out of the package", or "as received" on the RTR boats right out of the box? Have you seen the bushings wear out more quickly that what you think they should? I'm looking into getting some cast bronze sleeve bearings that match those in the strut and replacing the worn ones. Any thoughts/experience on doing that?
Thanks,
Bob

[Darin Jordan]

Do you run these props "right out of the package", or "as received" on the RTR boats right out of the box? Have you seen the bushings wear out more quickly that what you think they should? I'm looking into getting some cast bronze sleeve bearings that match those in the strut and replacing the worn ones. Any thoughts/experience on doing that?
Thanks,
Bob

Unless I'm testing something that needed to be in absolute stock trim, I don't run, ever, the stock props... They are not conducive to making the boats perform. THAT being said, I was told that there may be some better options in the works from Pro Boat, but I don't know their status.

Generally speaking, you really should always have your props balanced and sharpened. I have to wear protective gloves to install/handle mine in most cases. They are that sharp.

Getting them PERFECTLY balanced is open for debate.... Only one blade is loaded at a time, so it's debatable how much that really matters. I get mine very close, but don't obsess over it.

As for the strut bushing. The stock ones do seem to get loose. I'm not sure what they are made of. If you have the tools/talent to do it, you can ream out the stock strut to .250" and install some Octura Lead-Teflon bushings and then you'll have trouble-free operation.

Measure (Mic.) the diameter of the stub shaft. The stock ones can vary, and some are smaller than the .1865 that they should be. A replacement Octura piece or ??? from OSE is a good option and upgrade.

These things are not unlike a Traxxas Stampede or any other R/C RTR... There are compromises on them, and plenty of upgrade opportunities.

To answer your question more generally... YES, it's optimal to have the prop balanced, and to have the driveline slop-free.

[Niky]

Hi Guys,
could someone tell me please; why the Proboat installed the ESC80A & 1800kv motor saying that it is compatible with 6s?
The same thing did the Traxxas too with the Spartan, and we know how it ended.
Is it possible that now when we have the technology of brushless motors,LiPo batt. and the new hard materials, they can't make a boat with no issues, naturally under condition that also the modellers must handle it carefully.
Salute all,Niky.

[Fluid]

Uh, no, it can certainly be done. There are numerous examples in current RTRs....you can see that. I cannot say why PB states that 6S is suitable with an 1800 Kv motor....it is not for 90 percent of users. Like the Spartan that is an invitation for disaster....a poor decision IMO. But that has nothing to do with running that boat on the proven 4S voltage.




.

[bob_t]

Darin,
Thanks for the response. I have the tools and ability to modify the strut. Thanks for the info about a better bearing solution - will need to give that a try. Thanks for the candid answers, too, I appreciate that. Hopefully I didn't sound like I was bashing PB, because I'm not. I really like their product(s) and understand that some compromises are necessary to stay "competitive" with the market. I think, in general, they do a good job of picking which compromises to make. I was sort of suprised that the literature/description for the prop said that additional balancing was not a necessity, as is usually stated with "as purchased" cast props.
Thanks again!
Bob

[Darin Jordan]

Darin,
Thanks for the response.

Good Luck! Here are the bushings I use: http://www.offshoreelectrics.com/pro...od=oct-oc6ltsb

I have a .2505 reamer that seems to do the trick... If you end up with the hole a tad loose, you can use some good Loctite sleeve retainer to hold them in place. Use a minimum of one at each extreme end of the stub-shaft. I usually use three for full support, and lube them with a good oil lube...

[mannytx1]

hi all
Impulse 31 v2 is a good boat, just in
5S and propeller 42mm
4s propellers in 45mm
6s is a design error
Motor A3630- 1800Kv no torque for 47mm

Darin you have more experience than me
Why Proboat? Not publish all the technical characteristics of the motor and esc dynamite

Constant Current:
Burst Current:
Resistance: .
Battery: 2-6S Lipoly
BEC:
Motor Type:
Size:
Weight:
*Speed:
Timing
Max rpn

100_0186.jpgThanks,
manny

[formulafastech]

I am undecided i have a Proboat Formula Fastech it runs great but im looking for something faster im thinking of the impulse or spartan my friend has the spartan he broke the shaft twice then upgraded the shaft it runs good now no problem. What do you think impulse or spartan?

[mannytx1]

100_0182.jpg
HI formulafastech

impulse 31 v2

Spartan is a toy

[formulafastech]

How is the impulse speed wise compared to the spartan

[formulafastech]

Any upgrades necessary for the impulse

[hobby_man]

[ATTACH=CONFIG]87246[/ATTACH]
HI formulafastech

impulse 31 v2

Spartan is a toy

TOY? do u own a Spartan?

[mannytx1]

impulse 31 v2 5s = spartan 6s

impulse 31v2 50+mph in 5S only