High Performance Self-Righting Trimaran: The Test Model

[Doug Lord]

Originally Posted by Schoonner

Now THAT sounds like something I'd like to try. Why not make a modular model that you just glass together after printing all the pieces?

Nice model Doug Lord!! I dunno why I didn't see it before. I admire the curved pieces between the main hull and ama. They remind me of the stub wings between the fuselage and engine nacelles of the P-38 Lightning WW2 fighter. Might even be able to get a little lift out of them when pointing windward. Just figure some foils for them that will be more effective on the leeward side at 45 degrees from straight on that way the windward side doesn't see as much lift as the leeward side. You could also use longitudinal fins on them to reduce their lift coefficient at angles you don't want as well as increase drag when running. (Just my two pesos)

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Thanks, Schoonner!

[Doug Lord]

Frank was a great sailor in the 60's when we were kids and we raced each other almost every day-every day when we got our Windmills. We didn't always see eye to eye as time went by and he got wanderlust and moved around a lot developing into an extremely competent printer.
He loved the Pacific Northwest and lived there for a long time. He recently moved to Omaha ,Nebraska because of work-and he didn't like it.
We've grown closer again over the last 20 years and he is my best friend.
He was found dead in his apartment yesterday ,apparently having died from a massive heart attack in his sleep. I'll miss our great discussions on boats, politics and women. I still can't get my head around the fact that my younger brother is gone.
I dedicate my work in design and invention to him and his memory.
Take Care, Frank......
-Thanks to some good friends of his, and to the extent it matters, his ashes will be scattered in the place he so loved in the woods in Oregon.
-Frank was found on the 17th but actually died on the 15th just hours after an e-mail conversation we had.

2009 picture-click on image:


I found this picture of my brother today-it was the last picture I took of him when he was here almost exactly one year ago today. I miss the guy terribly and I felt this picture adds to the tribute I've tried, in a small way, to make.
click on image:

[Corley]

My sincere condolences Doug. Take care and remember the good times.

[Doug Lord]

Thanks Corley-I just can't get over it....

[cavalier mk2]

Sad news Doug, my condolences as well. Staying busy helps, don't forget you have friends all over.

[Schoonner]

All things come to an end. =0( I am sorry to hear of your loss I know what it is like to loose someone. I find that working on projects and reading Psalms in the bible helps me when I am grieving. I don't know if you believe in God, but this always helps me:


KJV: Isaiah Chapter 41

[10] Fear thou not; for I am with thee: be not dismayed; for I am thy God: I will strengthen thee; yea, I will help thee; yea, I will uphold thee with the right hand of my righteousness.

[gypsy28]

Much condolences Doug, losing a loved one must be unbearable.

But what better way to honour your brothers memory than by dedicating a line of ultra cool foiling tris to him!

Keep your head up man,
DAVE

[Doug Lord]

Dave, Schoonner, Cav-thank you.....

[Doug Lord]

Finally got the matching halves of the curved foil molds. Next, the foil shape will be sanded into each surface, then they will be lightly glassed. Final "smoothing" then Partall#2 wax followed by poured PVA(not sprayed) and layup. I still have to get with Sam at Resin Research to get the right low exotherm resin(so it won't melt the styro). Both halves will be layed up at the same time and bonded. Section is a 9.5% T/C(thickness/chord) ratio..
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Here is the tentative laminate schedule for one half of my 3" chord, 9.5% T/c ratio 19" curved lifting foil for my test model. The T/C ratio is thinner than it would be full size(12%).
I'm using 5.8oz woven carbon-all laid double diagonally,.007" laminated thickness and 4.75 oz/sq.yd.(.033lb/sq') carbon uni,.012" thickness laminated:
Layers 1 & 2-5.8 -45/45
Layers 3-6 Uni
Layers 7-10-5.8 -45/45
Layers 11 & 12 Uni
Layers 13-16-5.8 -45/45
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Total: 6 layers Uni & 10 layers 5.8 for one half

Both sides total:
20 layers 5.8 @ .007" each= .14"
12 layers Uni @ .012" each= .144"
Total thickness= .284"
Chord=3" ; T/C= .284/3= 9.5% Solid carbon. This foil is highly loaded-supporting the whole boat(16lb).
As the half-foil is laid up the width of the pieces gets smaller due to foil curvature.
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Note: this is based on material I bought from Aircraft Spruce and Specialty some time ago-specs are the same now. http://www.aircraftspruce.com 1-877-477-7823




click on image:

[Schoonner]

Oh, I get it, they are upside down?

[Doug Lord]

No, sideways.

click on image to see important detail:

[Schoonner]

Originally Posted by Doug Lord

No, sideways.

click on image to see important detail:

OMG!!! THAT's EXACTLY what I wanted to do with mine! I started looking at your ama and it looks EXACTLY like what I want to do! (They are kinda shaped like ACWS cat hulls right? With a negatively slanted bow that is longer on the bottom than on the top? I wish we lived in the same area. Where do you live at?

Well, Mine are shaped like that on the ends of what amounts to a fin. I want to load the foil it in a specific way when the boat tries to heel so that it actually cavitates toward the top corners and creates a bubble that because it is sucked to surface of the edge creates lift and buoyancy as well as ease the flow around the ama by making it move past it's own surface tension rather than the top of the ama. Does that sound to hard to do?

[troy2000]

I'm sorry to hear about your brother, Doug. I lost one of my younger ones a couple of years ago, so I can understand some of what you're going through. Part of my pain was realizing the potential which had hung fire in his life for this reason and that was irretrievably gone. He'll never have a chance do the things I knew he was capable of....

[Doug Lord]

Originally Posted by Schoonner

OMG!!! THAT's EXACTLY what I wanted to do with mine! I started looking at your ama and it looks EXACTLY like what I want to do! (They are kinda shaped like ACWS cat hulls right? With a negatively slanted bow that is longer on the bottom than on the top? I wish we lived in the same area. Where do you live at?

Well, Mine are shaped like that on the ends of what amounts to a fin. I want to load the foil it in a specific way when the boat tries to heel so that it actually cavitates toward the top corners and creates a bubble that because it is sucked to surface of the edge creates lift and buoyancy as well as ease the flow around the ama by making it move past it's own surface tension rather than the top of the ama. Does that sound to hard to do?

========
Schoonner, see the PM I sent you......

[Doug Lord]

Well, guys my brothers death has been an awful thing to have to deal with but there has been a strange twist of fate. He left me as sole beneficiary on an insurance policy, that if it comes through, will change my plans dramatically. The owner and controller of my brothers company told me about it and have told me I will definitely get the money.
So on that basis I'm temporarily stopping the model/SRT project and begining
the design of a smaller lighter trimaran that I can actually have sailing relatively shortly. Most of the new boat will be assembled from existing parts-I'm starting a new thread to follow the design thru to sailing:
" 16' EagleFBL,an MPX Foiler-the Actual Boat". Much of the tech I have developed to be tested on the model will be tested on the new little boat-except the self-righting which will wait for the model or a larger boat.
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I want to thank everyone that has participated or checked into this thread.
This project is not over just temporarily put aside so I can get a boat to sail in a hurry.
Thanks to Jeff, this thread will be temporarily locked so I can concentrate on getting ready to sail-but it will be back!