Good evening has all, I am ashamed, but me puts you a link towards a video of my boat.
Having said that, I began only for approximately one year!

I need your help!

I think that the back is too much in the water and that the engine should advance(move) little?

ps : i use a translator to write in english , also excuse me if that isn't very Understandable





the video :

www.dailymotion.com/fredetnoe/...luneville_sport

Normally a center of gravity (CG) of about 32-34% works well on most monos I find. Looks like the motor could be moved forward some, but also looks like the boat isn't quite up to speed yet. Seems like it's running wet until it hits a wave, then it looks like it too lite in the nose. I would shoot for a CG of 33% and play with the rest, including tuning the pipe for best performance and trying different strut depths and props. Try keeping your strut angle at 0 degrees and if you have tabs, start neutral with them also. You should only need minor adjustments to the tabs. If you need to input too much tab to get the attitude you want, change props and or strut depths.

thanks to your help.

the propeller is an K70 graupner ,not in metal.
i can begin to use an men propeller

but between octura, abc, propshop, and many other i don't know the model i can use.

that isn't simple


i can't use more of 70mm diameter , because the rudder isn't far.

i put an picture of the rear of the hull

the hull do 8kg RTR

normaly , the engine is including with the tunned pipe , hanson put an line in yellow paint to show the good setting.

the picture to show you, and know what propeller can i use.

i looking this evening were is the C.G and a say you.

thanks.

another

How big is the boat and what is the engine? Zenaoh modified?

the boat is 1200 mm of lenght with rudder.

the engine is a zenoah g230 pum modified by hanson with pipe hanson too.

hanson call this modification " gold" the top (water circuit)of the cylinder is in gold colour.
this modification was made between 5 or 6 years ago.

i don't have the number part of the carburetor in head but i look this evening.

can see the engine on a picture when i have bought the boat.

I would probably leave the engine where it is then...or make sure not to go much more than 30% with CG. I would thing some of the following props should work ABC G20, Prather 270, Octura 470, 472, 670. These should be in the ballpark...

ok , also i leave the engine where it is.
and i'll try with prather or other, and maybe add of weight has the front
and maybe adjust the L and R screw to adjust correctly the carburation.
thats right ?

thanks

also , the carburator is a walbro WA 167 A

the hull lenght without rudder , is 48.031 Inch and the canter of the engine is at 11.811 Inch of the back board.

this make 24,6% It is a little bit just not?

i join a litle draw (don't laught!)

Here is a good article on finding the CG of your boat: www.modelgasboats.com/Magazine...er_Balance.html

Find out where yours balances and let us know. I would shoot for about 30% to start. The distance of engine to transom really means nothing. You have to know where the entire boat balances...that is your CG.

If memory serves me well, the 167 should be set at about 1-1/4 turn on the Low Needle and about 1-1/8 turn on the high. This will be a good starting point and optimum settings shouldn't be too far from that.

Keep us posted!