What would you do with this hull?

[siberianhusky]

It's about 70cm long.
I've watched a number of videos of these Euro style boats running, they look like a blast!
I can't seem to find much setup info about these designs.
I know they run a sub surface straight shaft drive and an under hull rudder, thats about it!
What kind of shaft angle do you think would work?
Power suggestions? Not concerned with any rules about battery capacity or anything, just for fun.
Where on earth do you think the CG would go?
Any idea what FSR-E21 might mean?
Looking for something to build from scratch, and I have the patterns for this thing.
I think with the right hatch and the left "wing" open at the transom with some air holes up front it should self right.
Most of the on-line translations of the Euro sites end up being to confusing for me to understand, they don't do technical translation very well.
Any links for info would be great.
PHOENIX Linesplan.jpg

[RayR]

Search for "Eco Expert" and you will find a bunch of info. It's a european Naviga class.

[Gromov]

Hi,

I let these boats as a professional. I even have a world champion 2010 NAVIGA in this class.

What questions - detailed answer.

[Race]

Eco expert plan
http://forum.modelarji.com/viewtopic...=4&t=74052

Sent from my HTC Wildfire S A510e using Tapatalk 2

[larryrose11]

Gromov,
I have an Graupner Eco Manta. I have a 1500 KV motor in it I run on 6S with a y534 prop. It has a straight driveshaft. I have a question about the drive. When it is up on plane, it seems like the nose is sticking to the water. I was thinking about installing a flex shaft and some sort of strut I setup so I can make the prop shaft parallel with the bottom of the hull, or at least more so. I thought it would plane better.
What to you think?

[viper1]

What kind of shaft angle do you think would work?

as positive (or 'flat') as possible, depends on the max prop size you want to run.

Any idea what FSR-E21 might mean?

Here is a list with classes: http://www.fsmr.ru/secm-eng.htm

"FSR-E21 - racing RC model with water propeller and electric motor.
Power up to 21 cells, race is 15 min."



This is my scratch build, but it is smaller, only about 50 cm,running 2s on a 3900kv motor;

[Gromov]

flex shaft

Hi!

Do not need any of flexible shafts. Just reduce your propeller to 30 - 32 mm. 34 - a big diameter for such a configuration motor/battery.

[larryrose11]

Gromov, youtr saying that the angle of the prop dost have that much effect on how these boats run?
Am I usaing a Tacon 3650-540-25T, 1500KV. Im running it on 6S.

http://www.hobbypartz.com/96m296-3650-1500kv-25t.html

Is this too big of a motor for this hull?

[Gromov]

big of a motor for this hull?

Hi.

1. angle output shaft to the boat (I also had a boat before) for your motor 9-11 degrees. No more need.
2. About the motor: this motor can be put on your boat. Propeller diameter should be about 29 - 30 mm. Pitch propeller - 34 - 36 mm.