Aluminum 8 meter beast

[Alexmach1]

Indeed...since that is only 55hp/tonne...which is "moderate" by any standards of measure for planning monohulls.
Just about any similar size boat with same power will be consistent with these performance values....

Of course it's not blazing speed, but as I said earlier it's really good result.
You can see weight is 2982kg with yamaha 250hp outboard engine but without fuel.

 

[Alexander Peter Bromley]

Alex! I think your boat looks great and you've done a great job on exterior styling. It's one of those looks the old-school sailors won't enjoy but if you like modern it really works.

Why do you guys fit such small Hp motors, why not rather 350-450hp range?

 

[Alexmach1]

Alex! I think your boat looks great and you've done a great job on exterior styling. It's one of those looks the old-school sailors won't enjoy but if you like modern it really works.

Why do you guys fit such small Hp motors, why not rather 350-450hp range?

Thanks a lot, Alexander! Small HP motors are just simply cheaper, this is a crucial factor for many buyers in our market. But the boat is designed for a maximum motor of 450hp.

 

[Alexander Peter Bromley]

I see! You might find with a bigger Hp your fuel consumption can improve, as the small Hp engine is working harder. Also I see there is provision only for single installation outboard. Might you want to design for a twin motors to use as a coastal runabout.

 

[Alexmach1]

I see! You might find with a bigger Hp your fuel consumption can improve, as the small Hp engine is working harder. Also I see there is provision only for single installation outboard. Might you want to design for a twin motors to use as a coastal runabout.

I designed A11 boat for 2 engines) but it's 11 meters.

Watch the video

 

[Alexander Peter Bromley]

Very cool, those renders you're doing are better than some of the big design offices are producing.

In that second photo below the render it looks your chine is very reversed, or downward angled is that correct?

 

[Alexmach1]

Very cool, those renders you're doing are better than some of the big design offices are producing.

In that second photo below the render it looks your chine is very reversed, or downward angled is that correct?

I am not understand

 

[Alexander Peter Bromley]

Hi Alex, this is very much subjective criticism as maybe this is the reason for such a design forum. I haven't seen an actual midship section of your hull but by the photo shown here it looks like your chine angle is angled down quite a bit.

 

[Alexmach1]

I came up with this on purpose)

 

[bajansailor]

@Alexmach1 would it not be better to have rounded corners on your hull and superstructure windows, rather than sharp angles, especially as your construction material is aluminium?
I am thinking that you might have good potential there for cracks to form in the aluminium, starting in these corners?

 

[Alexmach1]

@Alexmach1 would it not be better to have rounded corners on your hull and superstructure windows, rather than sharp angles, especially as your construction material is aluminium?
I am thinking that you might have good potential there for cracks to form in the aluminium, starting in these corners?

Which corners exactly?

 

[TANSL]

It seems that Alex has no idea what the problem could be, its causes or where they occur. But the renders are very nice, that must be recognized.

 

[bajansailor]

Which corners exactly?

I am assuming that the apertures in the hull, where the windows are located, have sharp corners, rather than being rounded, as the window glazing has sharp corners.
And a sharp corner is not a good thing to have on an aluminium boat - it should really be radiused.

 

[Alexmach1]

It seems that Alex has no idea what the problem could be, its causes or where they occur. But the renders are very nice, that must be recognized.

No, I'm just asking for specifics instead of poisonous comments like yours. Do you really think that place is involved in such heavy loads to crack in that place? Huh, it's very funny, guys. Well, that says a lot about your knowledge.

 

[TANSL]

I fully agree with you, what we wrote says everything about our knowledge. I'm sorry you didn't like it but I think my previous comment (post #42) is totally pertinent.
A 4 tons boat, jumping over the waves at 35 knots, it is subject to efforts that should be taken into account.