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Search: Posts Made By: bobperry
Forum: Sailboat Design and Construction   48 Minutes Ago
Replies: 1,160
Views: 52,877
Posted By bobperry
Re: Steel vs Fiberglass

Overboard:
Yes, originally the coaming top was sized for Harken 48's and 60's.

We are using Andersen winches. The primaries and two of the house top winches will be powered and the other four...
Forum: Sailboat Design and Construction   11 Hours Ago
Replies: 1,160
Views: 52,877
Posted By bobperry
Re: Steel vs Fiberglass

I like a good fight. I'm ready for it every day. It stimulates me. It engages my mind.
I don't care for weasels.
Forum: Sailboat Design and Construction   14 Hours Ago
Replies: 1,160
Views: 52,877
Posted By bobperry
Re: Steel vs Fiberglass

We found out with Britt Chance's MARINER that the tank can produce erroneous results. But designers for years have tank tested boats. In the early days it was a bit experimental but by the time I got...
Forum: Sailboat Design and Construction   14 Hours Ago
Replies: 1,160
Views: 52,877
Posted By bobperry
Re: Steel vs Fiberglass

Not a chance BS. You are far too entertaining to put on ignore.

For the record, I do not offer any advice on steel boats. Home built steel boats do not interest me at all. I do comment on piss...
Forum: Sailboat Design and Construction   15 Hours Ago
Replies: 1,160
Views: 52,877
Posted By bobperry
Re: Steel vs Fiberglass

"I guess I wouldn't make a very good kindergarten teacher."

You would not qualify BS.
Forum: Sailboat Design and Construction   15 Hours Ago
Replies: 1,160
Views: 52,877
Posted By bobperry
Re: Steel vs Fiberglass

BS: You have never done any tank testing. You simply do not know. Of course a tank test is irrelevant to you. You will never get to do one so it's academic. If you can't do it , then it must be...
Forum: Sailboat Design and Construction   15 Hours Ago
Replies: 1,160
Views: 52,877
Posted By bobperry
Re: Steel vs Fiberglass

No BS, he was not talking about a BS boat at all. Don't think he is interested. I believe the poster has one of my boats.
Nice attempt though.
You cling on my every word.
Forum: Sailboat Design and Construction   22 Hours Ago
Replies: 1,160
Views: 52,877
Posted By bobperry
Re: Steel vs Fiberglass

What "knuckle" are you referring to? Not sure we are talking about the same thing

I do my best not to put "harsh" lines on my boats. My knuckle is subtle and not harsh. Where the coaming meets the...
Forum: Sailboat Design and Construction   1 Day Ago
Replies: 1,160
Views: 52,877
Posted By bobperry
Re: Steel vs Fiberglass

Left the boat yard yesterday after having a long discussion with client and plug builders about the cockpit coaming. I have kind of a knuckle designed into the side of the coaming so I can reduce the...
Forum: Sailboat Design and Construction   1 Day Ago
Replies: 1,160
Views: 52,877
Posted By bobperry
Re: Steel vs Fiberglass

" Want them toed in relative to sail angle? Sheet in a bit , and point higher."

There you have it. Science from BS. It makes zero sense but he believes it. And, he expects YOU to believe it.
When...
Forum: Sailboat Design and Construction   1 Day Ago
Replies: 1,160
Views: 52,877
Posted By bobperry
Re: Steel vs Fiberglass

Yep, those work. Those in the photo appear to be too close together for me. The AC work said that the "gap" had to be 7 times the chord for it to be effective. The second fin can' be living in the...
Forum: Sailboat Design and Construction   1 Day Ago
Replies: 1,160
Views: 52,877
Posted By bobperry
Re: Steel vs Fiberglass

"Testing for toe in or toe out in a testing tank is irrelevant. A model in a tank is towed from a fixed poin,"


Words from someone who has never even been in a test tank. I have. I am not expert...
Forum: Sailboat Design and Construction   1 Day Ago
Replies: 1,160
Views: 52,877
Posted By bobperry
Re: Steel vs Fiberglass

Funny: BS says we are on his "ignore" list but he seems to track everything we say. He is just full of BS. His attempts at "science " are laughable. This is the guy who brought you 182 degs of...
Forum: Sailboat Design and Construction   5 Days Ago
Replies: 1,160
Views: 52,877
Posted By bobperry
Re: Steel vs Fiberglass

Over:
Many thanks form that tip. I'l go after it today.

Got one on Ebay, third edition./ I look forward to reading what he says about the IOR. His sections in the early edition on the RORC was...
Forum: Sailboat Design and Construction   5 Days Ago
Replies: 1,160
Views: 52,877
Posted By bobperry
Re: Steel vs Fiberglass

Mike:
Ok. I'll go on a mission to find that edition. I did not know that it existed. Can't wait to read it.
Thanks for the tip.

BS is like a bad politician. He lies and when challenged he is not...
Forum: Sailboat Design and Construction   5 Days Ago
Replies: 1,160
Views: 52,877
Posted By bobperry
Re: Steel vs Fiberglass

That's very interesting Mike.
I became aware of BLUEBIRD of THORNE when I was a kid in high school. I loved that boat. I still have Douglas Phillips-Birt's book right here, 4' away from me. I'm...
Forum: Sailboat Design and Construction   5 Days Ago
Replies: 1,160
Views: 52,877
Posted By bobperry
Re: Steel vs Fiberglass

Picture BS answering a technical question.
Picture BS defending a technical absurdity.
Picture BS actually knowing what he is talking about.
Picture BS actually producing design drawings.
...
Forum: Sailboat Design and Construction   5 Days Ago
Replies: 1,160
Views: 52,877
Posted By bobperry
Re: Steel vs Fiberglass

Where does 100% come from? I'd need to see the math on that. I can't imagine you will provide any as you made up that number. Looking at your boats with twin keels each fin seem as big as most...
Forum: Sailboat Design and Construction   5 Days Ago
Replies: 1,160
Views: 52,877
Posted By bobperry
Re: Steel vs Fiberglass

Yeah,,,,right,,,,,,but,,,,,,,

If you have twin keels the chances you will have the same draft as a single keel are very slim. That's part of the point, i.e. reduce draft.
So, the reality is the...
Forum: Sailboat Design and Construction   5 Days Ago
Replies: 1,160
Views: 52,877
Posted By bobperry
Re: Steel vs Fiberglass

Brent says, "Now then, this was only one make and one model, but in theory, there is a whole lot more drag on a fixed bilge keeled boat since as Bob points out, there is always one foil that is only...
Forum: Sailboat Design and Construction   6 Days Ago
Replies: 1,160
Views: 52,877
Posted By bobperry
Re: Steel vs Fiberglass

Out:
South of me? I have them right here. They can be as big as a small island. And they can bring any boat to a halt.

Pano:
Yes, I think you could consider it a cannard type geometry.
The...
Forum: Sailboat Design and Construction   6 Days Ago
Replies: 1,160
Views: 52,877
Posted By bobperry
Re: Steel vs Fiberglass

Pano: Great information as usual. You are so smart you scare me. When you screw up , you fall out of the sky. I hate it when that happens. I heard once after AC research, that the chord gap distance...
Forum: Sailboat Design and Construction   6 Days Ago
Replies: 1,160
Views: 52,877
Posted By bobperry
Re: Steel vs Fiberglass

320
We, meaning my office, have designed numerous boats with Kevlar in the laminate. We bought into the hype. I'm sure and I know that Kevlar has valid uses but it has not proven effective in an...
Forum: Sailboat Design and Construction   6 Days Ago
Replies: 1,160
Views: 52,877
Posted By bobperry
Re: Steel vs Fiberglass

Good information when it is specific like that Jeff. I had never heard that about twin keelers being hard to get off the mud but it sure makes sense. Perhaps that's why we see so many BS boats...
Forum: Sailboat Design and Construction   6 Days Ago
Replies: 1,160
Views: 52,877
Posted By bobperry
Re: Steel vs Fiberglass

Seems reasonable.
Average speed difference is .25 knots which would be very important racing but not so much cruising. I'd need to see polars.
I would assume this is just speed through the water...
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