Setup for Whiplash GV or Backlash

[electric]

I am thinking about setting up a boat to run "Open Hydro" in the "1st Annual LSMBC RC Boat World Championship Series Race ". As the name implies, it is pretty much wide open Nitros, Gas, Electric so long as you adhere to Namba safety rules. I am starting to zero in on racing either a Backlash(48") or a Whiplash GV (44"). There is a budget, so I am thinking a Castle 2028 with a HVCastle ESC running 10s. First, I would like to hear from anyone who has some experience racing in this type of format on whether I can be competitive. I am also concerned about what type of batteries can be fit in these type boats to get 10s2p(leaning towards the Backlash). I have some 4000mah hyperions (6s) that I could match up to some 4s hyperions to get 10s. If you have done this before or something very simliar let me know your setup and what I can expect.
Thanks.

[RaceMechaniX]

I would heavily lean towards the whiplash or Backlash over the GV. The GV is a nightmare to set-up for FE due to the tight cockpit. The wood versions allow for more freedom in mounting positions during the build process. The extra length of the backlash may help locating all the batteries up front where the gas motor would normally sit giving you sufficient space in the rear to mount the motor.

The 2028 is a very solid choice on either 8S or 10S. I have run a 2028 with a Castle ICE esc in a thunderboat and prefered 8S over 10S becuase I could run gas size props which the hull was intended for. 8S is also more forgiving on proping if you over do it.

If I were to build one I would go with the Whiplash even though it is smaller. I have two Gen II wood whips and a GV all gas. One of the wood whips is a 2-time national champ and I love the way it drives.

TG

[electric]

I would heavily lean towards the whiplash or Backlash over the GV. The GV is a nightmare to set-up for FE due to the tight cockpit. The wood versions allow for more freedom in mounting positions during the build process. The extra length of the backlash may help locating all the batteries up front where the gas motor would normally sit giving you sufficient space in the rear to mount the motor.

The 2028 is a very solid choice on either 8S or 10S. I have run a 2028 with a Castle ICE esc in a thunderboat and prefered 8S over 10S becuase I could run gas size props which the hull was intended for. 8S is also more forgiving on proping if you over do it.

If I were to build one I would go with the Whiplash even though it is smaller. I have two Gen II wood whips and a GV all gas. One of the wood whips is a 2-time national champ and I love the way it drives.

TG

When you say you would go with a Whiplash, do you mean the 36" long version? I actually own one of those and currently race it in "Q" trim. Do you think it will manage okay in the chop generated by the big hydro's I will be up against in the race? I currently run a neu 1527 in that boat and I could easily drop in the Castle Motor and then just wire two 5000mah 4s batteries serial.

I figured to run open hydro I would need a bigger boat to handle the race conditions and be competitive. Hence looking at the Backlash and now maybe the Gen II as you have pointed out.

[RaceMechaniX]

I meant the Gen II 44" gas version. The 36" will not handle open class chop nearly as well as the 44" The added weight of an FE system over the gas system will not hurt you so long as the CG is maintained. I have raced my Gen II whips in very nasty chop with very little problems. In fact I got into more trouble when I lift and slow down in choppy water compared to when I just stay full tilt.

I have a nitro sport 40 whip as well, but compared to the 44" gas version there is little comparison in stability.

TG

[oscarel]

Hey Jim, glad I'm not going to be the only one running electric! I bought a used Speedfreek hydro I just finished setting up, ran for the first time today. I'm using the 2028 as well and am starting with 10s2p since I have them. I thought about running my Q whip but as stated I don't think it would fare as well with the chop. I was able to balance mine placing the motor in the same position as where the gas engine would go and the lipo's behind it. 6s with 4s on top X 2.

[electric]

Hey Jim, glad I'm not going to be the only one running electric! I bought a used Speedfreek hydro I just finished setting up, ran for the first time today. I'm using the 2028 as well and am starting with 10s2p since I have them. I thought about running my Q whip but as stated I don't think it would fare as well with the chop. I was able to balance mine placing the motor in the same position as where the gas engine would go and the lipo's behind it. 6s with 4s on top X 2.

Hey, we have to give those gas and nitro guys a run for their money right? I am curious to see how well an electric hydro can match up to the gas/nitro. All I know is it has to be a big hydro and very fast to have a chance. I can't imagine how you got all those batteries to fit? What mah are you using? I can barely squeeze two 6s 4000mah batteries into my whiplash.

[electric]

Has anyone run an electric backlash or whip II and managed to get all the batteries crammed in there? If so what mah and make? I am just double checking I can get the batteries into one of these boats and if the inventory of batteries I currently have might work.

[photohoward1]

I RUN A GEN ll gas whip with a NEU 2220 on 10S. All fits fantastic up front. 2 sets of 5S 3300 up front, 2 sets 5s 3300 behind and then the Motor. The controller sits on top of the batts. Schulze 41-60. You can definitely do it on 8s with the right turn motor and a cheaper high amp controller. Should be good for 60-70mph. Mine does 70 in race trim and I have no problem doing 8 laps on 6600mah.

[electric]

I RUN A GEN ll gas whip with a NEU 2220 on 10S. All fits fantastic up front. 2 sets of 5S 3300 up front, 2 sets 5s 3300 behind and then the Motor. The controller sits on top of the batts. Schulze 41-60. You can definitely do it on 8s with the right turn motor and a cheaper high amp controller. Should be good for 60-70mph. Mine does 70 in race trim and I have no problem doing 8 laps on 6600mah.

Thanks! Were the 3300's a tight fit in the front or back or was there a bit of room? Hoping I can get some 6s 3300 mah batteries in the front or back with some 4s batteries in the other location...

Ever measure the amp draw? I am thinking I need at least 70mph to even be in the hunt with these guys. Sound reasonable?

[oscarel]

Hey, we have to give those gas and nitro guys a run for their money right? I am curious to see how well an electric hydro can match up to the gas/nitro. All I know is it has to be a big hydro and very fast to have a chance. I can't imagine how you got all those batteries to fit? What mah are you using? I can barely squeeze two 6s 4000mah batteries into my whiplash.

They fit with LOTS of extra room. 5000mah 6s/4s pairs. And I made sure to add extra floatation, 3 pool noodles this time! The cowls on the whip and backlash look slim towards the outside so I would definitely see if someone's done it before.

As RaceMechaniX stated I'll probably settle on 8s as well, just waiting on 2 more lipos.

2013-01-30 21.08.09.jpg

[racerr73]

Any pics available of the interior and exterior of this boat available to see at all photohoward1??

Thanks
Trev

[electric]

Does anyone have experience running with the Neu 2215/2y? Any opinions as compared to the Castle 2028 I am looking at currently.

[RaceMechaniX]

The 2215 is not going to have the grunt of the 2028. If you running a 10S1P or 12S1P light boat that motor would be suitable, but the 2028 favors the larger gas boats and can push 2P worth of batteries around.

I have run a 2215 1.5Y and the Castle 2028 in a 10S2P cat. The 2215 has to work a lot harder with smaller props to achieve the same speeds.

[electric]

The 2215 is not going to have the grunt of the 2028. If you running a 10S1P or 12S1P light boat that motor would be suitable, but the 2028 favors the larger gas boats and can push 2P worth of batteries around.

I have run a 2215 1.5Y and the Castle 2028 in a 10S2P cat. The 2215 has to work a lot harder with smaller props to achieve the same speeds.

Thanks. Neu shows it on their website chart for "T" hydro, but nothing beats real world experience.

[electric]

Another question and a big one. What speeds would you expect to see out of the gas/nitro hydros racing in open class? I know there may be the exeptional one here and there that hauls, but what is typical?