NAMBA rule question

[sjslhill]

AquaCraft UL-1 Superior, can you run A123 packs? If so, how many cells, 4? Is this a 1P class or is 2P allowed? The same with SV27?

Not saying that I would not run LiPoly, just curious.

Steven is working on me real hard to go to MI for the Nats.

thanks,
Steve

[Ub Hauled]

There isn't a class for the UL as it comes in NAMBA... you'd have to change back to a 700 can and NiMh (14.4v). You could use A123 cells, with the equivalent of a of 14.8v max and 10,000mAh total.

[sjslhill]

I thought the UL-1 was the LSH class boat? scratching head And I thought the LSO was the SV-27. Is it the motor package or what exactly? Or maybe these are local rules that I am thinking about. 700? I thought those were voted out in NAMBA but the IMPBA still had them. I have a 700 in a classic hydro now.

[sjslhill]

Well, I went to the rules section and it's totally different that I thought.....

Where did I get the idea that the Aqua Craft drive packages were in the rules for classes, is that local events?

[Boatman]

Well, I went to the rules section and it's totally different that I thought.....

Where did I get the idea that the Aqua Craft drive packages were in the rules for classes, is that local events?

exactly, clubs are "allowing" that drive combo.

[sjslhill]

Nevermind...I see the rules now from the MMEU site 2009 N.A.M.B.A. FE Nationals

LSO= ** NAMBA LSO accept 4s1p Lipo allowed
additional motors allowed Aquacraft SV27, ProBoat Black Jack, and AC UL1 motor


LSH=*** NAMBA LSH accept 4s1p Lipo allowed
additional motors allowed Aquacraft SV27, ProBoat Black Jack, and AC UL1 motor

OPC=*Motor options Aquacraft sv27,Proboat Blackjack,and AC UL-1 motor
4s1p lipo.

[sjslhill]

other questions

what is Production? Ult Offshore, Ult Sprint, N2 Sport (hydro?)

[sjslhill]

http://www.mmeu.com/MCX2009Nationals.htm

[Bill-SOCAL]

A123 cells have proven themselves in other RC applications. However, for boats they are not as neat a solution as lipos are.

They are rated at 3.3 volts per cell nominal. So a 4 cell pack is 13.2 volts and 5 cells are 16.5 volts. A 5 cell configuration is too high for "P" power so you would be stuck with a 4 cell pack at 13.2 volts.

Capacity is the second issue. The largest cells are 2300 mAh, so to get enough for a decent heat run you would need to run them at 4S2P to get a 13.2 volt pack with 4600 mAh capacity. The cells are pretty large and I doubt you could fit them in many boats.

[Darin Jordan]

The cells are pretty large and I doubt you could fit them in many boats.

However... if you CAN fit them in... the UL1 NEEDs the weight in the nose... from what I've seen...

[sjslhill]

thanks

Thanks Bill, I understand the limitations of A123 but since I have hundreds and that's what we sell for many applications, I figured that's what I would use. 4 fully charged LiPoly cells is 16.8V but 5 fully charged is 18V. However, at 2.3AH the voltage drop and weight disadvantage would offset a 5000mah LiPoly pack. The rules in my opinion should allow for 5 A123 cells in series but that's not going to happen. I'll stop at right there.

Anything thoughts on the those classes I had listed?

thanks,
Steve

A123 cells have proven themselves in other RC applications. However, for boats they are not as neat a solution as lipos are.

They are rated at 3.3 volts per cell nominal. So a 4 cell pack is 13.2 volts and 5 cells are 16.5 volts. A 5 cell configuration is too high for "P" power so you would be stuck with a 4 cell pack at 13.2 volts.

Capacity is the second issue. The largest cells are 2300 mAh, so to get enough for a decent heat run you would need to run them at 4S2P to get a 13.2 volt pack with 4600 mAh capacity. The cells are pretty large and I doubt you could fit them in many boats.