M supervee is acting funny. When i put it in the water it does whatever it feels like. It takes off and dosent stop when you want and it dosent recognise the throtle after you touch it. It just takes off at full speed. The stearing goes funny too. It turnes whatever way it wants when it wants making it an outof control boat. I know that there is not another frequency interfearing with it. I made sure that my brother got a different frequency and we have had no problems until now. Which had been about 3 months or about 7-8 hours of run time forone of the supervees and about 1hor runtime for the one that is going crazy.

Please help.[&o]

check your tx batteries they might be low on juice
also check you rx antenna wire to make sure it is clear of any power wires
hope this helps

what do you mean by powerlines

if your antenna wire is touching any wires wire power going through them like the servo or esc it could cause interference.
try to make sure your antenna wire is not touching anything with power.

Actually the best thing to do is to keep your receiver as far away from your esc as possible. That radio box is pretty small. I have removed mine totally and put my receiver in a receiver balloon on the other side of the hull. The esc is water proof and you don't need to worry about it. The radio box just adds weight anyway.

Are you running in a new area? There might be underwater powerlines? Did you get the reciever wet? How many cells are you running on?

One other thing,
If you are still running that piece of crap stock radio, ditch it and get a decent radio. Yes it may have ran fine in the past, but it is a ticking time bomb.

The stock radio is fine, I have been running mine for over a year without a single problem. Make sure that your receiver isn't wet, and you may try unplugging the ESC and steering servo from it, then plugging them back up (do one at a time so you don't mis the connections up) to make sure that you ahve a good connection. Do this with the crystals on the receiver and transmitter as well, and also the bullet connectors on the motor. You may just have a loose connection somewhere. You could change your radio if you want, but many of us use the stock radio and are very happy with it, and have no problems whatsoever.

*Your results may vary*

You may have more problems based on where you run (other RC equipment, broadcast center, powerlines etc.)

I never had a problem with mine but I love my Agressor.

*Your results may vary*

Exactly, just stating my opinion, which happens to be different than Wheelnut's. Just wanted traxxas4ever to know that not everyone believes that the stock radio is "a piece of crap", and that some of us like it, and have great success with it, and he/she may not necessarily need to run out and replace it with a high dollar FM or digital radio. You are correct in that problems/issues can very likely be location specific, I just choose to disagree with the blanket statement that the stock radio is "a piece of crap".

To each his own.

You are VERY LUCKY, Many of us have had problems with the stock radio and several guys reported watching their $300.00 dollar boat go flying into a wall on the other side of the pond. I had the same radio in my aquacraft profisherman and it glitched tiill I put in a better radio. I didn't even try my SV27 with the stock radio, once I seen it was the same as my other radio I switched it out right away. I don't like tempting fate.
If any of you guys want to risk your boat by keeping the stock radio, then by all means do so and may I say good luck to you, I will not reply about radio glitches on stock radios. I will however continue to warn new guys of the potential disaster involved by keeping the stock radio.

My stock radio gear was fine until it spent over an hour under water on its second time to the pond. I agree with you on the profisherman the setup in that boat definitely does not work well.

no glitches with my JR but I would like to upgrade to a 2.4gig radio

Yep, I have never had anything glitch with any of my JR radio's. Planes, boats, cars or trucks. I have had about 5 different models of JR radios.

Wheel, you are more than welcome to warn others' of the risk. I have no problem with that. I have had perfect success with many stock radios (including the SV radio) in my 18+ years of RC, and I will continue to use them as long as they work perfectly for me, in my locations. I have run just about every type of radio that you could ever imagine in those years and if the stock radio works without trouble for me, I see no need in spending half the boat's original cost (if not more) to upgrade the radio. I have even purchased a second Aquacraft radio system to run in a BL hydro (a 1990-era MRP Mr. Pringles hydro that I am converting from brushed to BL) because I have been so pleased with the cost vs. performance ratio of the AQ radio. You are more than welcome to your opinion, and to state said opinion, as am I, and I was merely doing so, not being critical of you in the least, and I apologizie if you took my comments at criticism of you personally. Avanti even stated that his/her stock radio worked fine until submerged, so I would venture to say that many folks have good luck with stock radios. SV27Dayton said it best, your mileage may vary, and everyone has to take their own specific and unique situations into account. Stock radios, in most cases, work perfectly for me, and I will continue to use them as long as they do.

im keeping my stock radio.

I hope that you have good luck with it for a long time!

Anyone know what the output voltage is on the sv27 ESC BEC for the receiver ? I lost my paper work on my boat !

It's rated at 5v 2A. I measured around 5.2-5.6v unloaded, under load this drops proportionally.

I'd also ditch the stock radio, especially for a boat over 35mph.

Ryan

Hey thanks , I already trashed the stock radio and the hull . The hull was not on purpose though . I hit a seawall wide open and smashed the front of the boat ! I was wanting to run my 2.4 radio system in it but I have to have 6 volts on it . I guess I can run a receiver battery on it or buy a new esc that supports 6 volt output .

I've asked this in other threads before but have never gotten an answer, so I figured that I would try again. I run 7 cell packs on the SV all day long without a receiver battery pack, yet there are those on the baords that swear that they are a "must-have". Can anyone tell me why? Does the reeceiver not like 16.8 volts as opposed to 14.4? I have been really curious about this for a while now, in regards to the SV and the BJ as well. I have a buddy running 9.6v packs (19.2v total) in the BJ without a receiver battery pack, and I wondered if the same thinking applied to the BJ receiver as well.

The esc should regulate the voltage going to the receiver no matter if you run 14.4,16.8,0r19.2 . If the esc is rated at 12-16 cells then the bec should put out 4.8 or 6 volts . The only time I would run a receiver pack is if I needed 6 volts and the esc would not supply that amount of voltage .

See, that's what I have always thought as well but there are enough people on the boards here that swear that you need a receiver pack that it makes me wonder what's up. I figured that if the voltage was too high for the receiver, it would fry and the tiny mushroom cloud of smoke would be my indication that I pumped too many volts into it! :-)

The esc should regulate the volts going to the receiver . I have never smoked a receiver from the volts coming off the esc . Now if you supply 14 cells to a 12 cell rated esc it may fry the receiver !

This is incorrect.

Most BEC's only function correctly to spec up to around 12NiMh/3-4 LiPo cells. The ESC may be able to operate up to 20 cells NiMh but the BEC must be disabled. Perfect Example is the Castle Creations line of boat ESC's.

As battery pack voltage increases, it is much harder for the BEC to drop the input voltage to servo/receiver voltage. This in turn creates heat. To much heat will destroy any electrical component and most definitely shorten the life span. Another point to keep in mind is the BEC may not be able to provide a regulated voltage to spec while over volting it. This will lead to higher voltages then normal at the receiver. Too much voltage may cause twitch, studdery servos, or interference.

You should run a receiver pack in these cases:

Voltage exceeds BEC limit
Current drawn by Servo(s) exceeds BEC limit

Ryan

Great explanation Ryan, very interesting! I guess that, simply put, 6 cells (or whatever a boat's manual (if the stock ESC is used) states) is fine, 7 is realistically at (or even slightly beyond) the upper limits, and anything above that (NiMH wise) is just asking for trouble. Higher quality ESCs (read: aftermarket) would equate to a better chance of riding the edge and living to tell the tale, consistently versus a lower quality ESC included with a RTR.