Best Whiplash Lipo Location

[LuckyDuc]

crabstick,
Thanks for your input. I may try it your way, but one thing that worries me about your motor being so far up front is driveline vibration. It seems that the longer the drive cable the more vibration no mater how much grease I use? Wouldn't a shorter stuffing tube and cable run smoother and vibrate less? Anybody have the answer? What is the best way to prevent a vibration free drive train other than perfect balance?


...

RE: vibration on longer drive cables... Many of the nitro racers mount the motor flat and put an "S" bend in the stuffing tube to reduce flop and harmonics. I have also seen some use additional strut bushings inside the stuffing tube itself and at the motor end.

[sailr]

I'm working on mine now. two 2S Hyperion 5500's up front. They are HEAVY. Still need some nose weight! It will be even worse with my Flighpower 5000's....much lighter. DANG! Boat is built and closed up. too late for weight in the sponsons.

[LuckyDuc]

I'm working on mine now. two 2S Hyperion 5500's up front. They are HEAVY. Still need some nose weight! It will be even worse with my Flighpower 5000's....much lighter. DANG! Boat is built and closed up. too late for weight in the sponsons.

Yep. It is hard to get the forward weight on this hull. You could drill a small hole in the bottom of the sponson tips and add BBs and epoxy. Then seal the hole up.

[highndry]

My batteries are 4" back from the nose..bulkhead is removed, Mine is also lsh power although I'm not sure if that matters

[highndry]

Are you trying to get 4s2p in there?

[detox]

Are you trying to get 4s2p in there?

Yes. For longer run times using the Nue 1515 1y motor. For LSH class I will have to use 4s1p to be legal. How well does your LSH Whiplash run?

[Jeepers]

Raydee did quite a bit of testing with his and confirmed that the CG needs to be around 1" behind the sponsons to keep stability at 60+mph speeds. BUT like you said. It is hard to know until you run it.

And Raydee said his boat has always ran wet I believe.

[Jeepers]

Yep. It is hard to get the forward weight on this hull. You could drill a small hole in the bottom of the sponson tips and add BBs and epoxy. Then seal the hole up.

Dont put the weight forward add the weight on the CG. Directly on it, it works good!

[sailr]

I may have to. I added 3.5 oz. in the front of the tub today and still enough. The other alternative is to move my servo way forward.

Yep. It is hard to get the forward weight on this hull. You could drill a small hole in the bottom of the sponson tips and add BBs and epoxy. Then seal the hole up.

[sailr]

That would require an enormous amount of weight!

Dont put the weight forward add the weight on the CG. Directly on it, it works good!

[Jeepers]

That would require an enormous amount of weight!

not as much as you think!

[Raydee]

My 2 cents is get the cells as far forward as possible. Anything less and the butt end will drag around the pond. My cells are now way up into the nose of the hull with the motor right behind them and it is the best running hydro I have ever owned. It will run wide open all the way around the pond and will turn like it is on rails at 60mph. My Whip was built a little heavy to withstand some abuse so it did run wet at first but once I figured out how to properly load a 1515 1Y on 4s it became a water rocket.

[jesflorida]

Whiplash 20 Lipo

My 2 cents is get the cells as far forward as possible. Anything less and the butt end will drag around the pond. My cells are now way up into the nose of the hull with the motor right behind them and it is the best running hydro I have ever owned. It will run wide open all the way around the pond and will turn like it is on rails at 60mph. My Whip was built a little heavy to withstand some abuse so it did run wet at first but once I figured out how to properly load a 1515 1Y on 4s it became a water rocket.

Kit just arrived and build is starting. My basics are Neu 1515 1Y on 4s. What prop are you using to properly load the motor and where did you locate the 2s2p or 4s1p cells?

Thanks for the info:

jesflorida

[Raydee]

This is where my cells are, and the motor is right behind them.

[jesflorida]

This is where my cells are, and the motor is right behind them.

Raydee:
]Thaks for the schematic, very helpful.

Are your G3lipos 3300 mAh or something else?

Can you tell me about your prop?

Thanks again,

jesflorida