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RC multihulls?

Old 12-30-2006, 08:03 AM
  #76  
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Default RE: RC multihulls?

I'm here and alive!!!

Waiting for some positive imput from outside!

"Nightmare-F48-fan forever!"

Let 2007 become the year of the rc-multihulls!
Old 12-30-2006, 08:21 AM
  #77  
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Default RE: RC multihulls?

lol Ernst thought youd deserted us haha,by the way you never did answer my questions regarding how you shape the foam hulls.like i said ive made hulls using foam blocks glued between the frames but from your pics you didnt do it that way so can you share your tecnique with us? or is it a secret lol .what kind of positive input are you talking about?is my input not positive enough for you lol?.i promise you once i start my build you will be sick of me that i can promise .
happy new year to you and everyone else!!yea i know its early but hey no harm in starting the party early cheers!!
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Old 12-31-2006, 06:44 AM
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Default RE: RC multihulls?

lol hi.yes you are right it is a modified Dave Cread Slim chance.Weighs about 3.75lbs.floats weigh 110gwith cross beam mounting fitted
Sails very well,does not lack bouyancy either at the bows or floats.Very rarely capsizes unless somebody starts to talk to me when in heavy weather.Will easily see a 1m mono off in most conditions,even to windward.has been know to sail in winds gusting 30knts without capsizing.[Very hairy]The cross beams give in water but not in air is the reason it can sail on one float.they are quite stiff
for normal sailing conditions.The reason the tris pitch-pole is that the whole boats stability footprint is wrong.you must let the 3 centres of bouyancy make a good triangle.the fit in a box rule makes it more like a hinge and offers little in stability if the bows are all of a fine
nature,that is why our hulls are set forward of the centre hull.More info if required.Please remember these tris are just test beds for what makes a tri tick we can adjust most parts at the waterside including the rocker on the floats.see latest photo.
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Old 12-31-2006, 07:03 AM
  #79  
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Default RE: RC multihulls?

HI!
There are no secrets at all!
It is only about UNDERSTANDING all involved FORCES!

More precisely there are lots of UnderstandingS - plural - not a big SINGLE Understanding (singular)
of what is going on with a trimaran -...-

On Thuesday, 2nd February 2007 I will add a lot of new building pics of my second and third mainhull-plug,
which will show/explain the building technology I developed myself -
it doesn't need plywood crossframes + foam -

->it just needs the coordinates I allready gave to you +
+ a precise sequence of drawing these dimensions directly onto the foam block +
+ about one hour of sanding (with enough feeling for harmonic hullshapes)
+ and then glass and epoxy.

Happy New Year + a lovely Party to you!!!
Old 01-01-2007, 07:53 AM
  #80  
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Default RE: RC multihulls?

Now we are actually here: -> 2007!!!

Greetings from Austria/Vienna!
_____________________________________________

We are planning several RC-Multihull-Meetings in Germany and Austria for the upcoming sailing season -
in addition to the events at France!

And I also have good building-news for you from Germany:

Another Mini40 Trimaran (of 3 planned boats out of these moulds) is on it's way!!!

Here are the first pics:
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Old 01-01-2007, 07:57 AM
  #81  
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Default RE: RC multihulls?

And some more pics of the first RC-Multihull-Meeting 2006 in Northern Germany:
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Old 01-01-2007, 08:00 AM
  #82  
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Default RE: RC multihulls?

Even more:
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Old 01-03-2007, 12:20 PM
  #83  
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Default RE: RC multihulls?

from the pics it looks like the boat is just sailing on the main hull? i dont see any pics of her sailing on one float?do you have any pics or videos of her doing this?.also do you have any pics of the boat out of the water .thanks for the pics Ernst i knew it would be complicated measuring and drawing arent my strong point so ill stick to what i know.which is wood!!.
Old 01-04-2007, 06:34 AM
  #84  
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Hi Martin!

Which boat do you mean? - In these pics are more than ten different boats!

These are basically all pics I have for the moment!

(There is a DVD available, where you can see the yellow/purple trimaran sailing -...-)

Best regards, Ernst
Old 01-04-2007, 07:14 AM
  #85  
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sorry for the confusion Ernst i was talking about the boat tricat has been modifying your pics by the way are great and only feed my hunger to build one even more.i was in such a rush i forgot to add his name to my post doh!!.my point was tricat that rather than modify a mono hull sailboat by adding floats etc wouldnt the best way to go be to use a properly designed trimaran!! either from plans or a kit.i also dont see how moving the floats forward of the main hull will make much difference when the boat is sailing on one float .if that were the case then all tris would surely be designed this way?.that said if the boat sails well in 30 knots it sounds like your doing something right.id really like to see it on one float though!!.a video of it would help convince me it works .
Old 01-04-2007, 08:48 AM
  #86  
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Hi Martin!

If you still want to use the plans of the 'Nightmare Mk.VII' - >

You can build it in 3mm Balsa Stripplanking and glassing it over as well!!!

1)you just need to print the pdf-files of it!

2)use the coordinates I gave to you, to draw the side-views directly onto your buildingboard(s) - minus 3mm all around.

3) draw the cross frames directly on the 3 mm Balsa as well - again 3mm minus all around!

4) plank the hullhalves up, like you are used to.

5) After completion of the planking, remove the hullhalves from the buildingboard(s),
seal the inside(s) one time with epoxy-resin, and glue the hullhalves together.
Don't forget the reinforcements for Crossbar-attachment and shrouds.

6) after curing, sand the outsides/surfaces of the hulls, untill you are satisfied with it.
Then glass the outsides with two layers of 80gr. glass.
Old 01-04-2007, 11:35 AM
  #87  
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Default RE: RC multihulls?

thanks for the tip mate i allready printed all the plans and taped them up ready to use.i will use balsa more than likely.do i need to do the hulls in two halves? i was considering building them in one peice and attaching a ply deck onto the hulls.ill follow the curv of the frames till i get to where i need to attach the deck.this is how ive done mono hulls before so it should be fine.
Old 01-04-2007, 01:12 PM
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Hi Martin! -

I can only tell you about my own experience:

Please do NOT - I repeat: DO NOT - build your hulls as single shells with ply decks!!!
Definitely!!!
The rounded decks are a mandatory prerequiste for high speed sailing!!!

If you make flat decks, this will cut the sailing- and speed-performance of you trimaran down to 50 %!!!
Yes, indeed - this is what will happen!!!

No matter, if you are sailing in flat or choppy waters - if you want to sail your boat 'on-the-edge',
the bows of the hulls - sometimes all three of them - will be submerged sometimes. -
And these rounded decks are the ONLY chance you have, to get them THROUGH the water and out again; -
- without flipping the boat over -and simply keep on sailing!!!

With flat decks the boat won't recover itself from being submerged!!!
__________________________________________________ _____________________________________

I can only tell you as frankly as I can - and as a real friend, that you shouldn`t sapotage your own intentions of a good trimaran by being too lazy to build SIX precise and lightweight shells!!! -

In fact, from my own experienced point of view I need to tell you:
If you aren't willing to build it the way I'm trying to teach you,
IT ISEN'T WORTH IT, TO START THE BUILDING AT ALL!!!

You will be disappointed to the bones!
Just because the flat deck hulls will fail right at the point, where the REAL multihull-fun should begin!!!

DO IT RIGHT - OR DON'T DO IT!!!

Look at this pic of the ORIGINAL NIGHTMARE 'Code RED'!!!
The bows are submerged as a gust hits the boat -
but the boat keeps up the speed AND comes out again -
-...- and just keeps on sailing at it's high speed. -

A flat-deck boat gets STUCK in the water, while the wind keeps on pushing.
The boats stops, like it had blockbrakes and just flips over -no chance, to cure that -
except rounded - sixshell building!!!
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Old 01-04-2007, 01:42 PM
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Default RE: RC multihulls?

hi Ernst i didnt mean i would make the deck flat i was still going to keep the rounded shape i realise the curves do a job.maybe ill just use balsa and carry on all the way round after removing the majority of the frames .or i guess i could do a top and bottom half for the main hull.my intention for the floats was to remove most of the frames apart from near the attach points and the centre of the float(halfway) and after strengthening at these points carry on planking till its all done then cover it in glass as normal.i like the idea of not having to join anything if i can.im sure it can be done without changing the shape any.what do you think about this?.im not lazy if it has to be done by making 6 shells i will.im just exploring possibilitys as ive said im not starting till spring.i may yet even decide on a foam build yet using polyester resin and cloth ,i know ill need to protect the foam from the resin but i can get it more easy and cheaper .
Old 01-04-2007, 01:49 PM
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Default RE: RC multihulls?

OK! - Sounds better!!!
Old 01-04-2007, 01:58 PM
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Ernst my problem is i know what i have in my head it just doesnt allways translate to my keyboard lol.dont worry i will make a boat i can be proud of and hopefully one you will like too.
Old 01-04-2007, 03:12 PM
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That's what I have in mind as well all the time!
(Otherwise I wouldn't have given so much help to you at all -...-)
In fact, I never gave so much help to a single person before. -

And actually you should be cutting cross sections by now -...- HAHAHAHA
Old 01-04-2007, 05:18 PM
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sounds ominous i guess im on my own from now on !
Old 01-05-2007, 02:26 AM
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No, - not really!

Just get started, buddy!!!!!!!!!!!!!!!!!!!!!!!

Then you may need help again -..............-
Old 01-05-2007, 04:59 AM
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Default RE: RC multihulls?

Hi Martin,Got your views on the multihull.One the multi was put together as a cheap way of getting a test bed on the water.The first thing to do was stablize it,as yes it pitchpoled.This we did by moving the floats forward.we think that if the drive force from the centre of pressure is in front of the lee float centre of bouyancy the bows it will most likely go down.So we move the whole float so that max bouyancy can be applied.No in a 30knt wind it did not sail well,it was survival sailing all the time but it did not capsize.I am at the moment looking at building a radiacal design multi but have yet to get my act together.I will ty and get a video of the multi sailing on one float.Hope this clears up any misunderstanding of my descriptions. Scotty
Old 01-05-2007, 06:52 AM
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Default RE: RC multihulls?

nice to hear from you Scotty dont think im rying to shoot you down im just asking the questions.a video would be good mate,in my opinion the more people who start building these multi hull boats the better for the sport as i beleive they are the way forward for sailing .the speeds these things can get upto are fantastic and i guess thats what is so exiting about them.i for one cant wait to get mine done so i can leave all the IOM s and such like lagging behind at the lake .
Ernst stop rushing me man im just sorting out all my materials for my sons gas boat which i promised would be done by spring .THEN ill start the tri and have it done by summer with luck. youll probably have all yours afloat by then,dont forget to keep us updated as you go and we want videos of the maiden voyage!!
Old 01-06-2007, 01:23 AM
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Default RE: RC multihulls?


ORIGINAL: martno1fan


Ernst stop rushing me man im just sorting out all my materials for my sons gas boat which i promised would be done by spring .THEN ill start the tri and have it done by summer with luck. youll probably have all yours afloat by then,dont forget to keep us updated as you go and we want videos of the maiden voyage!!
And then there's that Coroplex Blue Pea simmering on the back burner. Methinks that might take a bit longer now
Old 01-06-2007, 04:52 AM
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Default RE: RC multihulls?

Martin the pea pod hull is done just needs deck and keel fin (weight) fitting then i can fix a rig.i have to admit that one will be the last on my list now lol mind you it took olguy 30 yrs to finnish his i doubt it will take me that long lol.now stop causing trouble you beggar by the way i had a chance to see one close up in the autumn at a boat show she looked pretty nice for an old fashioned sailboat.right now my focus is on the tri i guess im hooked lol.
Old 01-06-2007, 05:42 AM
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Default RE: RC multihulls?

Hi guys,Just to let you know,I have posted a short video where my multi goes duck hunting.Also another picture to my gallery showing a close up of it at speed.I don't recon sailing and camera
work on a cold windy day go together as I nearly dropped the camera,ran ashore and nearly walked off the jetty.
Old 01-06-2007, 08:10 AM
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Default RE: RC multihulls?

wheres the video?

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