10s setups

[D. Newland]

First off, you can lobby your dual motor configuration to see if the rules can allow it. With your setup, the sum of the nominal voltage powering each motor fits within the rule, and you are not exceeding the overall cell weight limit.

You can power 2 motors with (1) 10S 5500 Hyperion pack if you use a buss bar type junction. The 10S1P pack gets plugged into the buss bar, then both ESC's plug in to the buss bar as well.

Or, as you mentioned, just make a Y adapter for each +/- lead on the pack so each ESC can be plugged in. However, the pack will be seeing an amp draw of around 140 or so, so you may want to use 8 mm connectors for everything. Maybe even directly solder the Y adapter to the battery leads to eliminate 1 set of connectors.

In order for that pack to make it, each motor cannot have an average amp draw higher than 70...give or take. This would give you 2 minutes full tilt runtime and burn 4500 mah's from the 5500 mah pack.

What motors fit that bill? I guess that's the million dollar question! I don't know of anyone running that type of dual motor rigger setup.
You may be close w/the 1527 2Y's, but it's a bit of a gamble.

Alan-what's the Kv of that Plett?

[AlanN]

800 approximately

[tth]

Mr Newland knows his stuff....very good advice.

[David Kingston]

I guess getting the right motor is the thing.
which one .... hummmm

Now that i have both ESC's working correctly off the 8s packs, im going to go out for a spin with it. 1527/1ys on 8s is going to be nuts. Amp draw will be heaps but a few short burst will be fine.

Put it this way...
If i go out and do a lap of a 300m oval (1/6th of race distance)
I find out that the setup uses 15% of battery... for that one lap.
that means at the end of 6 laps i would have used 100% of capacity. (NOT GOOD)
(we all know this is not perfect but it will also give me a ball park figure)

With my current setup i use between 9-12% pack for a lap.
Depending on prop and water conditions. Rough water it uses up more power than smooth. Each time that prop leaves the water than comes back down, it loads up so much more.

The boat was built more for wank factor than anything else

I should be able to head out for a full day boating on the 22nd of this month so i'll take the video camera and put more videos up of it.

Im also open to try other motors other than Nue as well.

If all else fails im more than happy to go get myself a few HR91's and run in X-hydro with this boat. If the new AA84's of 90 are out they might do the trick also.

Keep the tips coming
Dave

[Ub Hauled]

How viable is running in a SINGLE motor setup? Or that inflicts on another set of rules?

[David Kingston]

Single is possible...

What you got in mind. Ive thought about it a few times.
BAM (BIG ASS MOTOR)

Im going to have a play with the boat tormorrow if its not to windy.
Just to see if it will get up with the props i have to run.


Dave.

[Ub Hauled]

Here in the US the fastest guys around use a single motor, I am talking about Jay T. (Fluid) and Tyler (RaceMechaniX)... they have many Cat SAW records in the books, I've been seeing them at the events for the last 5 years and they always used a single motor.
A NEU 22xx or a Lehner 30xx would take care of biz. I am not sure how easy it is to get a Lehner down under but NEU motors are sold by Andrew (Fast Electrics dot com) and he seems to be a nice fella... besides, NEUs are becoming a favorite even in Europe these days...
about the cells... as long as you are under 1.5kg your are good right? So chk it out here...

30c 5000 packs all the way to the bottom

45c 5000 packs all the way to the bottom

or

get 4 or these for 6600mAh

35c 4s packs

[tth]

[QUOTE=Ub Hauled;217623]Here in the US the fastest guys around use a single motor, I am talking about Jay T. (Fluid) and Tyler (RaceMechaniX)... they have many Cat SAW records in the books, I've been seeing them at the events for the last 5 years and they always used a single motor.
A NEU 22xx or a Lehner 30xx would take care of biz. I am not sure how easy it is to get a Lehner down under but NEU motors are sold by Andrew (Fast Electrics dot com) and he seems to be a nice fella... besides, NEUs are becoming a favorite even in Europe these days...[/QUOTE]


Achim Kurrick (sp.) holds the German SAW record I believe with Neu motors in a HPR cat. First person to break 200kph.

[David Kingston]

Finally got the radar gun on my twin today.

It got clocked at 111kmph. So 70miles
Not bad for coming out of the corner and on to the main straight.
Was tested with my smaller worked props.
Still im happy with that. Guess by end of the straight it would be up to about the 120 mark

Its something to aim for, getting it to go faster

Might not seam fast, but if your a single rigger behind this, well good luck, cause it creates some massive holes for people to drive into. Its a MASSIVE TRACTOR in the corners. Carving up the water, just perfect.

I know that there are faster oval riggers out there. Hay we have single 6s riggers going 120kmph here in Aus. Using bugger all capacity. So prop up... At least this thing can run flat out in ROUGH conditions and not be bothered.

So what are the US guys riggers running at. My guess would be 80+ in oval trim. Is that 1p or 2p though. Is steve ressor (hope i spelt his name right) still running his 10s rigger. I remember a while back a youtube video of it.

Thanks
Dave

[RaceMechaniX]

Dave,

To be quite honest I bet there are only a handful of guys in the states that have 8S or 10S riggers. I know several have 6S and many have 4S riggers, but the cost versus speed is cubic in the 8S/10S class so not too many play with that kind of power. A solid 6S set-up will run quite fast. Several 4 cell riggers are running lap times equivalent to 7.5cc riggers, but against other electric which are not tearing up the water.

Very few riggers even nitro riggers run 80+ mph. C hydro (11cc) is probably the fastest class of any with competitive 6-lap times in the low 60 second range. Thats only averaging about mid 60's over a course. In 2-Lap competition the sub 10sec lap boats will run a tic over 80, but not much more.

In the states, if you want to run 8S or 10S set-ups you are usually only going to find competition in an open class where you will have nitro gas and electric. Here a FE cat or mono will fair much better in race water compared to a typical FE rigger. An open FE rigger would need to be very stable and probably oversize to handle the chop compared to a 2-lap or calm condition boat.

Tyler