GP335V2 20 SPORTS Hydro

[BAZCNG]

Hi would any one have the best motor position for am GP335V2 20 SPORTS Hydro

[ray schrauwen]

Best to get all your components (motor, esc, batts, etc.) to lay into the hull before you mount anything. There is no exact location for the motor mount since you could be using any motor, battery or esc and they all can vary in weight.
Basically finish the hull, add hardware except stuffing tube, lay components in to try and get the COG in correct position. I don't know the exact COG position for this hill, sorry.

[electric]

I have one of these boats built by MLBoatworks. Get the motor as far forward as you can and still have room for the batteries. The back of the motor can on mine is just a bit off the wood bulkhead. Watch the height of the batteries to ensure you have clearance for the lid.

[ray schrauwen]

What motor are you running? There is a fair bit of weight difference between a 1515 and a 1521.

I have one of these boats built by MLBoatworks. Get the motor as far forward as you can and still have room for the batteries. The back of the motor can on mine is just a bit off the wood bulkhead. Watch the height of the batteries to ensure you have clearance for the lid.

[BAZCNG]

I am using an Aqustar 3974-2200kv motor

[ray schrauwen]

That would be very similar in weight to a 1515 so like electric says, try to keep it as far forward as possible.

[BAZCNG]

Ok thanks for your help I will lay the batteries in and make the motor as close as I can to them.

[electric]

I took some pictures for you tonight. I hope this helps out. Note the lead weights in the boat. I just stuck some batteries in there to give you a sense of how it all fits in there. We are running these hydro's very fast in my club and it is a challenge to keep them down on the water. I would say we are over 65+mph(on a perfect day) and I found the additional weight actually has given me a bit more reaction time when the hull lifts to get off the throttle and have it settle back down. This particular boat is doing really well right now and is competing against another GP335 and in a strong field.

With the GP400 (we race those, three in my club) the people who put the heavier foam in the sponson's are generally doing better, but not the end all be all. I built my hull (GP400) lighter and have since been working on getting less lift and more mass in the boat to handle the speeds it's doing.

Here is a video of it running. The antenna had come lose and was rubbing against the metal on the control rod and messing up the radio. You will see it stop a few times, but stuck with it..

https://www.facebook.com/photo.php?v=701710919849020&set=vb.448732121813569&type=2&theater

[BAZCNG]

Thanks for your reply and the pictures. Can you please give me your COG

[electric]

The Cog is roughly about 1/2" back on the turn fin mount bracket. I have others in the club running the same boat and their COG is as far back as the rear portion of the turn fin. Their COG is further back because they mounted the motor a bit further back and as I recall they have the servo sitting back close to the rudder which shifts the COG back a bit further as well. They are just as fast as me and its an even race. They do have more weight in their sponsons than I do which I think adds some stability and reduces the "take flight" mode.

By the way, notice the elimination of failure points. 1. Receiver in waterproof container 2. Servo is a HiTec water proof servo 3. ESC is sprayed down with CorrosionX

Also, if you could get the esc mounted on top of the motor that is a good idea to protect it if you get a leak somewhere.

Looking at my pictures makes my realize the boat is showing the wear and tear of racing on the ol' paint job. When I got it from MLBoatworks it was a flawless. Chuckle.

[ray schrauwen]

You are running a 1521 1.5D yes? no?

The Cog is roughly about 1/2" back on the turn fin mount bracket. I have others in the club running the same boat and their COG is as far back as the rear portion of the turn fin. Their COG is further back because they mounted the motor a bit further back and as I recall they have the servo sitting back close to the rudder which shifts the COG back a bit further as well. They are just as fast as me and its an even race. They do have more weight in their sponsons than I do which I think adds some stability and reduces the "take flight" mode.

By the way, notice the elimination of failure points. 1. Receiver in waterproof container 2. Servo is a HiTec water proof servo 3. ESC is sprayed down with CorrosionX

Also, if you could get the esc mounted on top of the motor that is a good idea to protect it if you get a leak somewhere.

Looking at my pictures makes my realize the boat is showing the wear and tear of racing on the ol' paint job. When I got it from MLBoatworks it was a flawless. Chuckle.

[BAZCNG]

Thanks very much for all your help. I will set it up as you recommend. will post photo's when finished

[electric]

Yes, a 1521 1.5D.

[electric]

Thanks very much for all your help. I will set it up as you recommend. will post photo's when finished

Great, you are going to love the boat, really a nice hydro. We race these where they are going so fast, they are almost right there with the Q hydro's we are running. This hydro is the one boat(besides my backlash) that can leave me shaking a bit after a race. Great fun.

[785boats]

Fast Electric Addict.

We race these where they are going so fast, they are almost right there with the Q hydro's we are running.

What's your set up that gets you those speeds? Or is it a secret.

Cheers.
Paul.