4 point hydros

[cyberhoops]

I am thinking about building a 4 point hydro, along the lines of the 1980 Circus Circus boat or the 4 point Elam... I used to see a lot of them back a few years and they were very quick as I recall, but I have never built or run one.

As such I have a few questions:

Does anyone have any pictures/info on what type of ride surfaces were used on the front and back?

Do they have turn fins?

What might be the placement of the CG?

[raptor347]

That may be the ultimate 1/10 scale. Do you have a 3 view of the elam?

Try to get some pictures of the old fisher canards.

Not legal as a sport hydro.

[Fluid]

What you are referring to is a canard hull - all canards are 4-point but not all 4-pointers are canards. I ran one years ago with limited success due to low power and high weight. Canards run best when slightly over-powered.

This is the only photo I have of a bottom. The front sponson has a flat pad on it. The CG depends on the sponson design but is usually 30-35%. Turn fins were not usually installed, except for one model AFAIK.

http://i48.tinypic.com/aey5qs.jpg

[Simon.O.]

From the bottom pic that Jay showed mine is nearly identical, yet that is the first time I have eveer seen that pic.
Mine is a lot smaller 26" and has a 8S 4400 kv on 2-cell lipo.
Proped right will clear 70 kmh mid 40's mph
It was a blast to design, build, modify and setup. It is one of my favourite hulls and a XL powered one may happen next year for me.

[questtek]

You micht want to check out a previous posting on this forum:

http://forums.offshoreelectrics.com/showthread.php?t=6598&highlight=canard

If you go to the end of the above forum reference you can see a canard(s) I am working on that appears to be identical to the picture shown. I can provie more info if this is the type of FE you are interested in.