hi i built this rigger from scratch and need more info on out riggers
any help will be good
http://www.modelboatmayhem.co.uk/for...?topic=23679.0

Can you attach more photos?

3300kv on a 4s using a 37mm prop is going to draw a heck of a lot of amps. I would use a different motor.

I would also not be running a plastic prop. The load and high speed could rip it apart.

What is the length of your hull? Is this for SAW or Oval?

Ryan

HI the length of this rigger is 68cm X 36cm
well i do not intend raising it in any category fore now its jast for fun

when i started building this rigger my intention was to go fast in a straight line

there is a small issue with the boats i build i have no Budget now and i have to figure out a dissent hull to accommodate the equipment that i all ready have
well i have running this setup on a mono hull with 40mm plastic prop its not the best setup but when i bay the equipment i was new to RC boats so now i understand that i have made a big mistake choosing this setup

i have built 3 mono hulls around this setup only 1 is a good hull i made a mould from old pvc boat turbo panda it is running good so fare my boat is a good opponent of the king of shaves fore a short run
we are a small community of rc enthusiasts taking the challenge of pushing the RC boat sport in Israel well i started several years ego and now we have several fast boats that tearing the lake

we also running sail boats the sailing is more popular tanks to hobby city with the MONSOON900 there are 8 of those and 2 kiosho sea wind

well the forums is my only hope of finding information regarding rc boats there are no professional RC boaters

i will post more photos soon

we are in the beginning of the sport development in Israel so any help will be good fore as

more pics the green boat is one of the bad boats that i have built
i was using a 60A ESC with 3s30c2800ma the ESC now rest in peace in one of the runs it capsized and and was not sealed properly so i burned the ESC

the sail boats
http://www.youtube.com/watch?v=MaL_lEN7nMQ
enjoy

The members of the forum here can address any questions you may have. Just be specific with your questions, what are you looking to find out?

Ryan

OK with the rigger i have a problem connecting the sponsons i don't know what should be the angel of attack and if i have to offset the motor and drive to prevent prop walk ???

Personally I can't remember what my rigger has for AOA. I believe I'm somewhere around 3 degrees. My Front sponson is 13.5" on a 34" hull and has 5" of the 3 degree AOA.

The more angle of attack will give higher speeds but increased chance of lifting off the water. Lower increased AOA will provide great stability.
Lowering the Strut will artificially lower your AOA. Raising or lifting the strut will artificially increase your AOA. This works best on riggers with no rear ride pads (sponsons)

I would not offset the drive. When you trim out the boat properly you will not really notice prop walk. I personally have never had a problem with prop walk. Usually my hardest problem to solve is prop bounce. (for the smaller riggers)

Ryan

WOW thanks that's the info i was missing
the main hull off the rigger has to be allso in 3 degree AOA or the front sponsons only??
and do i have to be able trim the sponsons or its have to be permanent ??

thanks Ram Aram

The tub should not even be in the water so the AOA is not relevant in most cases. I'm sure there are some that may argue it will make differnce You still shape it so it doesn't plough the water on the nose. (Quite Obvious)

You can set your sponsons to be adjustable or not. I use carbon fiber booms that are permanent with no adjustability. Any adjustment will make things easier to trim the hull out.

Ryan

if you have the battery mounted towards the nose then you can use that for adjustment backwards and forwards

there is one more what should be the length of the shaft from transom to the engine mount??
i understand that the CG have to be some ware in the end of the front sponsons or not??

and i intend to remove the foam from the tab and do more reinforcements
the ESC is a air cooled heat sink i isolated the electronic with RTV hi heat resistant silicone only the heat sink is e exposed to air and the electronics is water resistance
i have run my boat with the same 3300 setup and it have a tendency to roll over in half throttle deep-v 70 cm hull but its another story ...

It should be however long it needs to be to reach your motor. As long as this is long enough in order to not have a tight bend you should be good to go.

Ryan