Quote:
Originally Posted by nitrostarter
Honestly, I highly doubt this is the case. Most guys there run boats that are setup to spec. N, P, Q classes, etc... They are listed as to which battery setups are used.
Have a look at this chart:
http://www.castlecreations.com/suppo..._boat_apps.pdf
This is a helpful tool for boating.
Honestly, I don't think A123's are worth there salt in boats... Most setups require high quality Lipo cells as boats can pull SIGNIFICANTLY more amps than the car world. For instance, most people that run 1515/1Y use a Hydra 240 because the amps spike up pretty high continuously. Its also very easy to use the wrong prop and burn up something in a heart beat.
Also, most FE boating setups only get 3-7 minutes of runtime. I would want to most mAh available.
Now on to your setup...
Aeromarine Titan 29, a beautiful mono with the ability to take a decent chop. In order to make boats work properly, you want to spin 28-33k rpm's. SO if you're insisting on pushing a 850kv motor, 10s will be necessary.
Honestly speaking tho I would opt for the 5s2p setup for not only more available amperage, but more than likely, more runtime.
Motor choice: The KB45 1700kv would be a great choice, KB's seem to be a hard to beat motor in boats when properly used. However, a Feigao 11XL would work just as well in this hull. This 29" hull doesn't really require more than a feigao 9XL for power. A 10XL would be optimal.
I don't know your asperations for the boat but for anything over 30mph I would run a Feigao 11XL on 5s2p, with a X445 prop. Should be a reliable setup with those A123's being the weakpoint...
Enjoy. |
Well, posting this same question on HV setups another OSE member looking to do a 10sLiPo setup got every response telling him HV is "not needed" or "I don't know" so I basically took this as not many FE guys are running or have experience with High Volt setups.
Since the whole build is around my A123's (because of charge time) I am trying to pick components to work with these cells in a 10s1p configuration.
This is a play boat as I don't have any clubs close by so high 30's-low 40's is my goal.
Plugging in my proposed setup here
http://www.offshoreelectrics.com/conversion.htm on the
Speed Estimate by Use of Voltage & Constant "Kv" table nets me 38mph
with
Medusa 36x70 880kv
10s A123 (33v)
and a X442 prop
should get 3+ min run times with under 15min charge times plus I have 2 sets of 5s Lipo to run as 10s as well.
Yes the 5s2p setup will have more available amperage but it will also consume 2x the Amps for the same Wattage. So how can it get more runtime having less efficiency?
The 5s2p setup you suggest comes out at 37mph which is bang on what I'm looking for just want to know why you feel 5s2p over 10s1p w/lower kv motor?
I think if the A123's in 10s can handle 2000+ watt loads in todays 3D helis
they can hold there own in my reasonable setup.