Supervee 7L , 220 prop, which batteries????

[jpracing1997]

I have a hydra 120 and was wandering which batteries to run on this boat? 4s , 5s, or 6s? What can it hanlde?

[D. Newland]

7L Nemesis/Fiegao motor? 2S is plenty.

If the 220 prop is a Prather prop, you'd be better off with a 215, or an Octura X442.

[calcagno45]

Is the 7L going to be enough motor for the SV27?

[D. Newland]

Yes.

The L motors have more mass than the AMMO motors, so I'm sure they have more mass than the stock SV 27 motor (though I've never seen any published weight for it).

Water cool a 7L and it will work very well with 2S Lipo's. I've run many years with this motor in a BBY Phantom 24, Ovalmaster 26 and even the BBY Patriot 28" mono. Works fine.

I would ballpark my 7L amp draw average to be around 80 amps with an X442, so if runtime is a concern, you may want to parallel up the packs to get better runtime. An X440 prop should drop the amp draw to around 70 amps. Your results may vary.

If you're looking for a 4S motor, then the Ammo, a 10L or a 9XL would also work IMO. However, any of these motors will over-power the SV 27 hull. You may just like the SV 27 on 2S w/the 7L! Or just stick w/the stock motor/ESC.

[Fluid]

It should be plenty. 3500 Kv and 2S is plenty of rpm and watts. He could go faster with a different motor and 4S, but he will probably be very happy with the 7L and 2s if he wants to stick to the H120.



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[jpracing1997]

Thanks for the replies! I just mounted the motor in and I guess I am gonna run two 2s packs in it.It's a 7l feigo motor and a hydra 120 esc. What prop do you suggest running on this setup?

[Darin Jordan]

Make sure you water cool whatever you put in that hull... Based on quite a few heats of racing... the SV27 hull seems to get setups hotter than those same setups in any number of other hulls...

[D. Newland]

X440 2 blade IMO. You'll have quite a good selection of props to choose from once you get the hull dialed in. X438, X437/3, X440, X442, X642, depending on how fast you want to go and how much runtime you want (don't want).

Get it dialed in as soon as possible. If you notice the setup isn't right, bring it in and tune it rather than keep running it as is. Use a stopwatch.

Once dialed in, start with fresh cells. Run for 1 minute and bring it in and check for excessive heat in motor, cells and ESC. If everything is OK, run it another minute. Bring it in, check for heat and charge the cells. See how much MAH drained for the 2 mintues. That will give you a ballpark idea about your amp draw.

3600 / (runtime in seconds) X Amp draw = average amp draw

3600 / 120 seconds X 2 amps (2000 mah) = 60 amp average

Random side note: If you charge your (2) 2S packs as a 4S pack on the charger, you'll need to multiply your mah input by 2 because the packs are being charged in Series, but you're running them in parallel.

[NorthernBoater]

Random side note: If you charge your (2) 2S packs as a 4S pack on the charger, you'll need to multiply your mah input by 2 because the packs are being charged in Series, but you're running them in parallel.

The mah will be the same if he charges the 2 2s packs in series. He will just have to set up the charger to charge a 4s pack.

[D. Newland]

This may not be relevant to JP's charging setup, but if you have (2) 2S packs that run in parallel in your boat, and charge them in series as a 4S pack, you have to add the amount of mah's put pack into each pack (or times the mah # X2) to determine the overall MAH usage of your 2S setup.

For instance, if you have a 2S2P setup that drained 3000 mahs and you charged the pack as a 2S pack, then the charger would put 3000 mah's back into the packs.

If you split off your packs and charged them as 4S1P, the charger would say that 1500 mah's went back in. That's the # I'm referring to that needs to be doubled.

[jpracing1997]

Prop

What prop would be the best for speed with the 7l and 2s or 4s packs with the hydra 120?

[Steven Vaccaro]

You cant run a 7L with 4s and a sv27. It will blow the esc. Thats why I said in emails not to run the X-power with that setup.

[SJFE]

AND THERE WE HAVE IT I'll shut up now before I get myself in any trouble....

[jpracing1997]

Thats all I've been asking! I bought a hydra 120 now and I am wandering if the 9xl I have is a faster motor than the 7L? 9XL on 4s and 7L on 2s?

[jpracing1997]

And it didnt blow on that setup. It blew on the 9XL with 2s2p in the sv27 with the grimracer prop!